ML20198B027

Univ of Missouri Research Reactor,Murr

ML20198B027
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Site:	05000000, University of Missouri-Columbia
Issue date:	10/07/1983
From:	Brugger R MISSOURI, UNIV. OF, COLUMBIA, MO
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.s THE UNIVERSITY OF M]SSOURI 1

RESEARCH REACTOR, MURR

~ Robert M. Brugger, f

i University of Missouri

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Columbia, Missouri 65211 U.S.A.

i Abstract The University of Missouri Research Reactor (MURR) which is located near the Columbia campus is the highest powered, highest flux 3teady state university reactor in the U.S. A.

The reactor d

i operates at ten megawatts.

The flux in the flux trap reaches 6 x 1014 n/cm2 set and the source flux for beams is as high as l

1.2 x 1014 n/cm2 sec. The reactor supports research in neutron activation analysis, neutron scattering, radioisotope applications, effects of radiation, neutron radiography, nuclear engineering and nuclear science.

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Introduction I

The University of Missouri's research reactor is located in the i

Research Park one mile south of the Columbia campus.

This reactor is the highest powered, highest flux steady state reactor at a -

1 U.S. A. university. Known throughout the world by its call letters -

MURR, the facility provides. intense sources of neutron, gama and neutrino radiation for research and applications.

The facility com-piements other radiation sources--X-rays, infrared and ultraviolet light and ultrasound--to provide academic researchers a complet set j

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of diagnostic capabilities.

Experimenters from all four campuses of z

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the University of Missouri (Columbia, Kansas City, Rolla 'and St.

Louis) in more than two dozen departments, conduct research at the 1

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reactor.

The facility is also available to researchers from other j

gR universities and from government and industry.

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EE The three major parts of the KIRR organization are Reactor 2$

Operations, Health Physics, and Research and Applications.

The re -

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l An invited paper at the. international Symposium on the Use' and Development of Low and Medium Flux Research Reactors, Boston, MA (October 17-19, 1983).

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s.f actor manager and staff see to the safe, efficient, continuous oper-ation of the reactor while the health physics manager and staff pro-vide control of radiation exposure.

Research and applications l

groups and programs develop and maintain equipment and procedures to

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ef ficient use of the radiation capability.

promote The Reactor j

The central research tool at the research reactor facility is a.

The neutron irradiation reaches ten meoaJatt flux trap reactor.

also con-6 x 1014 n/cm2 sec in the central flux trap. The facility irradiation facilities, a hot cell and several tains other neutron for radionut. ide l

1aboratories totaling 26,000 square feet, designed and ionizing radiation work.

The various radiation facilities in-clude a thermal column, six beam ports, twelve irradiation baskets -

and four pneumatic tube systems to the laboratories.

The hot cell contains 800 Ci and 3,000 Ci 60Co irradiation sources.

Construction started on the facility in 1963, and the reactor first went critical in October 1966.

Operation started at a maximum power of 5 W, and the operating schedule was increased in steps to 100 hrs /wk by 1969.

In July 1974, maximum power was increased to 10 W; in September 1977 the operating schedule was increased to 150 hrs /wk.

A program to evaluate the possibility of an addition up-grade and define the upgrade target are now in progress at MURR (see spaper by D.

M. Alger at this meeting).-

Figure I shows the

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Figure 1.

Operating Experience of the KIRR.

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a The solid line shows the build up of operating history of the PJRR.

total m'D while the histograms show the rate of producing power.

The reactor now operates at a rate of 100% of the scheduled time and t

Seldom is time lost to unscheduled shut-91% of all available time.The dip in the rate in 1968 was because inadequ was allowed in ordering fuel.

The dip in 1974 was a two week downs.

scheduled shutdown to make modifications for the escalation of power j

l' to 10 W.

The dip in 1982 was a 8-2/3 day shutdown to replac.e the Be reflector.

l Figure 2 shows on the left a horizontal section through the i

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center of the core and on the right a vertical section of the re-l

' actor core, pressure vessel and reflector. Eight fuel elements in The active core is 29.77 cm in diameter the fuel zone are the core.

De-ionized j

and 60.96 cm tall.

The. active core volume is 33 liters.

the core 3,600 gallons per minute through water flows at a rate of This primary water exchanges heat with a to remove the 10 W heat.

The secondary system ex-secondary system through a heat exchanger.

the reactor changes the heat to air in a wet cooling tower south ofremoved through the builoing.

Ninety three percent of the heat is Pressure

, primary system and seven percent through the pool system. inlet temperature o in the primary system is 70 psi.

The normal the primary is 120*F; normal outlet temperature is 138'F.

i Each fuel element-i's assembled from 24 fuel plates; each pl. ate is a sandwich of highly enriched uranium fuel between aluminum 1

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plates, held together by side plates and end boxes.

The core has 6.2 kg of 235U fuel.

About 62 gms of 235U are fissioned each week and 24 percent of the 235U in each element is used during the 1200 megawatt-day life of each core, i

Research The MURR supports research in a number of areas.

Over one hundred papers have been published or submitted since July 1982 from

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Details of the research can be found in the biblio-i research.

such the meeting graphy *of these publications which will be available at l

or will be sent by the author upon request.

t of the i

The Neutron Activation Analysis (NAA) Group supports one In kAA, samples are irrad--

l active areas of research at tne reactor.

the elements in the samples are disting-iated with neutrons, then vished by the characteristic gamma rays that are emitted. Two pneu-laboratory stations l

matic, inpile irradiation tubes leading to four which accomodate instrumental neutron activation analysis and radio-I I

chemical neutron activation analysis.

A filtered beam of thermal neutrons is used for prompt genna neutron activation analysis.

Major, recent programs in NAA include forensic investigations, trace

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I identifications in milks, trace element identifications in element silicon crystals and essentiality level studies of Se related to hu-man and animal health.

detecte'd by sensing 77mse.

Tiace amounts of selenium are Samples are irradiated for 5 see then counting for 29'sec following a 15 sec decay.

The high flux of MORR makes these.short irradi-ations feasiable. With this technique 300 samples per day can be run with high accuracy and preci sion.

The selenium essentiality measurements cover a wide range of animal and human studies designed to elucidate the roles that this element has with respect to health.

The Nuclear Analysis Program is now directed toward applying NAA methods to archaeological studies.

One strength of the MURR extensive collection of obsidian samples from the program is the The trace. ele-l prehistoric obsidian mines in Meso-America.

major element analy -

ments i~n these are being characterized so that trace ses of obsidian artifacts can be compared to the trace element pat-tern in the collection and identified for origin of the source of obsidian.

A second thrust is the identification of trace elements in

• ancient bones to identify nutritional patterns and diseases.

Studies of chert (flint) sources in the United States are also in

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' progress.

The Neutron Scattering Program. uses both slow neutrons and

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gama rays to study sne properties of condensed matter.

Both in-elastic and elastic scattering of neutrons and gamma rays are used as diagnostic techniques.

In addition the neutron scattering pro-gram includes basic physics measurements with a neutron interfero-meter.

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3 shows a cross section of the RIRR with the six beam l

Figure tubes in-The neutron scattering instruments at these beam tubes.

ciude a triple axis spectrometer (3XE), two single crystal isiffrac-tometers (2XE and 2XD'), two powder diffractometers (2XC and 2KD),

(one with a multi detector and one with a position sensitive de-l tector) and a small angle scattering diffractometer (SANS) (with two dimensional position sensitive detector).

In addition three gamma scattering instruments are now in operation, a single crystal dif-with Mossbauer fractometer (MUGS), a single crystal diffractometer (QUEGS), and a Compton spectrometer (COGS).'

At energy analysis beamport B a double crystal monochrometer feed a beam to the neutron interferometer.

With MUGS, absolute intensities of Bragg peaks have been measured in addition to the mosaic spread of Bragg. peaks.

With J

QUEGS, the fraction of inelastic scattering in a Bragg peak is

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measured.

With COGS, the momentum distribution of the valence electrons in samples is being measured.

With the SANS instrument, studies are being pursued of biological materials and of polymers.

l powder diffraction instruments, studies are being pursued With the of adsorption of gases on graphite, magnetic properties of hard mag-l nets, fatigue in bulk samples and phase modifications in the binders in cermets.

The single crystal diffractometers are focusing toward measuring hydrogen bonding in metal organics.

The triple axis spectrometer is being dsed to study V 0.

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_The neutron interferometer has been used for several signifi-1 i

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Figure 3.

Beam port arrangement at MURR.

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cent studies; the relation between the gravitational and inertial neutron and mass of the neutron, the interaction of the spin of theneutron), the the spin of the earth (the Sagnac effect on the of the scattering length of a nuclear measurement of the real part resonance, and the length of the wave packet of the neutron.

khe Radiation Effects Program studies the effect on materials of the i rradi ation produced by the reactor, i.e.,

neutrons and gama rays.

Recent studies have focused on identifying and measuri'ng the energy levels in the band gap of semiconductor sili-con.

New innovations in deep level transient espectrocopy (DLTS) have been realized with charge transient spectroscopy (QTS) and cur-rent transient spectroscopy. In addition uniaxial stress has been introduced to establish the atomic symetry of the defect ' site re-sponsible for the deep. level.

Figure 4 is a diagram of the instru-ment and an example of the data.

uses the high neutron fluxes of the The Radioisotopes Group _

These are then used in the MORR to make neutron rien radioisotopes.

many experiments where radioisotopes are used as tracers or are used Recent em-as diagnostic markers or therapeutic agents in medicine.

toward developing new medical generators for body phasis has beenscanning by the Unive.'sity's nuclear medicine department, for can-of radioisotopes to be,used as an in vivo radiation source ter therapy, and for tracers in hypertension studies.

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_The Instrument Development Group _ develops digital electronics 1

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Press used to apply uniaxial stress and example of DLTS data.

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data manipula-radiation detection, ' signal identification and ti on.

Major successes have been the stepping motor controler for the 25 cm x 25 cm position systems for the several saectrometers, sensitive detector for the SANS instrument and the position sensi-Figure 5 shows a i

tive detector (PSD) for the powder diffractometer.

spectrum taken with the PSD.

This spectrum covering 20'<26< 120' Before the PSD when was t'aken in four settings of three hours each.

a single detector was used, this spectrum would have taken two weeks The rate has been increased by about 3D. and the re~ solu-to collect.

l tion. has.been improved.

Neutron Radiography uses the neutron' flux from the thermal l

tne NRR to make radiographs of objects.

The program has column of the capability of direct images and transfer images.

Recent de-velopr.ent has been the development and. application of.an on line in-j age system that is now operational.

and re-Nuclear Engineering picks up the teaching, development power fission search associatec min operating and upgrading a highavailable for many of -

A set of filtered neutron beams is reactor.

these measurements.

Research has focused on neutron spectrum mea-l surements, deep penetration in shielding, measuring the Doppler broadening of nuclear resonances, development of neutron computed axial tomography (CAT) and the development of capture gama emission focused on improved l

A. number of thesis and dissertations have CAT.

methods for and diagnosis of the behavior of the PtlRR.

i Nuclear Science encompasses experiments to explain nuclear forces using the radiation from MURR.

Recent experiments have i

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the position sensitive detector.

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y focused on shake off reactions and ionization during electron cap-ture decays.

Conclusions khe P.'JRR is in its eighteenth year of operation.

The reactor continues to operate safely, reliably and with excellant operating The research programs are meeting numerous national experi ence.

needs with several unique experiments and many signigicant resdits.

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s... o Bibliography of Recent Publications The Reactor University of Missouri Research Reactor (MU?.R), Annual Report, Juli 1982-June 1983.

Reactor Operations Univers-ity of Missouri Research Reactor Facility, Reactor Operations, Annual Report, August 1983.

Neutron Activation _ Analysis M. Alauddin, W. Ehmann, W. Markesbery, T. Hossain, " Variation of Trace Element Levels with Age in Normal Human Brains", Proc.

17th Annual Conf. on Trace Substances in Enviromental Health, Columbia, MO June 1983, in press.

A. DuChemin, 5. Langhorst, S. Morris, V. Spate, " Tritium Mon-itoring at the University of Missouri Research Reactor", Pro-ceedings of the 9th Biennial Conference,of Campus, Radiation Safety Of ficers, accepted.

W. Ehmann, W. Markesbe'ry, T. Hossain, M. A1 uddin, D. Goodin,

" Trace Elements in Human Brain Tissue by INAA", J. Radioanal.

Cher.c. Vol., 3, No.1-2, pp. 57-65,1983.

W. Ehmann, T. Hossain, D. Goodin, W. Markesbery, " Neutron Activation Analysis for Aluminum in Brain Tissue", Proc. Conf.

" Aluminum Analysis -in Biological Materials," Charlottesville.

VA, June 1983, in press.

W. Ehmann, M. Alauddin, T. Hossain, " Brain Trace Elements in Pick's Disease", Annals of Neurology,1983, in press.

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W. Ehmann, W. Markesbery, T. Hossain, M. Alauddin, D. Goodin,

" Brain Trace Element Studies of Aging and Disease by INAA",

Transa'ctions of the kn. Nuclear Soc. 3 206-207, IS82.

Glascock, "The Use of' Capture Gamma Rays for Laboratory Ele-M.

mental Analysis", Nuclear Technology, submitted.

M. Glascock, " Analytical Applications of PGNAA", Trans. An.

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. Nucl. Soc. 43, 255, 1982.,

C. Graham, M. Glascock, J. Carni, J. Vogt, T. Spalding, " Deters-T.

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ination of Elements in National Bureau of Standards Geological Standard Reference Materials By Neutron Activation Analysis",

l Analytical Chemistry, 54, 1623, 1982.

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E. Heimann, M. Smith, J. Morris, T. Gall, R. Elmore, R. Morrow,

" Seminal Selenium Concentrations and Spermatozoal Abnormalities in Seef Bulls", Theriogenology, 18:3, 297-302, 1982.

E. Heimann, M. Smith, J. Morris, T. Gall, R. Elmore, R. Morrow,

" Relationships knong Sperma ozoal Abnormalities and the Selenium Concentration of Blood Plasma, Semen and Reproductive Tissues in Young. Bulls", Animal Reproduction Science, accepted.

5. Koirtyohann, S. Morris, Environmental Carcinogens-Selected Some Elements and Their Compounds". Vol. 7 Methods of Analysis:

Chapter vill, " General Review of Analytical Methods", Internat-ional Agency for Research on Cancer, World Health Organization, submitted.

Computer Programs for In-D. Lindstrom, R. Korotev, "TEABAGS:

strumental Neutron Activation Analysis", J. Radicanal' Chem. 3,

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439-458.

W. Parkesbery, W. Ehmann, M. Alauddin, " Bulk Brain Aluminum Concentrations in Alzheimer's Disease", Proc. Conf. " Aluminum Analysi~s in Bioingical Materials," Charlottesville, VA, June 1983, in press.

W. tarkesbery, W. Ehmann, T. Hossain, M. Alauddin, " Brain Manga-nese-Concentrations in Human Aging and Alzheimer's Disease".

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Vol. IV, Neurotoxicology,1983, in press.

U. Parvin, M. Lindstrom, " Rock 67105:

A Feldspathic Fragmental

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Breccia with KREEP-Rich Pelt Clasts", J. Geophys. Res. 88, A659-670.

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5. Morris, M. Stampfer, W. Willett, " Toenails as an Indicato Dietary Selenium", Biological Trace Element Research, accepted.

S. Morris, W. Willett, M. Stampfer, " Utilization of Toenails as a Dietary Marker for Selenium". Trans. of the Amer. Nuc. Soc.

i June 1983.

A P. Salpas, L. Haskin,1. McCallum, "Stillwater Anorthosites:

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Lunar Analog", J. Geophys. Res.

D. Sears, K. Weeks, A. Rubin, "The First ELS Chondrite, Evidence for a Dual Genetic Sequence of Enstatite Chondrites", Nature.

submitted.

2. Sheng, W. Sullee, D. Sears, " Trace Element Data on Enstatita Chondrite Components and the Qingzhen Enstatite Chondrite",

Lunar and Planetary Science X111,1982, 718-719.

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V. Spate, S. Langhorst, A. Duchemin, "! terr.41 Dcse Determina-tion for S-35 Contaninetion", Proceedings of the 9th Biennial Conference of Campus Radiation Safety Officers, accepted.

W. Tian, W. Ehmann, " Observations Relative to Epithermal and Fast Neutrons in INAA", J. Radioanal. Chem., submitted.

W. Walsh, M. Lipschutz, " Chemical Studies of L Chondrite II.

Cosmochim.

Shock-Induced Trace Element Pebilization", -Geochim.

Acta, 46, 2491-2500, 1982.

W. Willett, B. Polk, S. Morris, M. Stampfer, S. Pressel, B. Rosne'r, J. Taylor, K. Schneider, C. Hames, " Prediagnostic 130-133, Serum Selenium and Risk of Cancer", The Lancet July 16, 1983.

Nu' clear Analysis M. Glascock, T. Spalding, M. Cornman, J. Byers, " Analysis of Copper-based Metallic Artif act by PGNAA", Archaeometry.

M. Glascock, M. Cornnan, " Nondestructive Analysis of Ancient Roman Artif acts Using. Neutron Capture Gamma Rays", Radiochem.

Radioanal. Lett.

D. Ives, "The Crescent Hill Prehistoric Chert Quarryi,n,tinent,g Area",

Prehistoric Chert Exploitation-Studies from the Midcor.-

May, M.D. editor, Southern Illinois Press 1982.

R. M. Rowlett, " Prehistoric Cultural Continuity in the Missouri The Truman Reservoir", Gray Literature Publication Ozarks:

Division of American Archaeology and U.S. Corps of Engineers-1983.

R. Rowlett, H. Thomas, " Northwest Europe: Chronologies in Old World Archaeology", University of Chicago Press, ed. R. Ehrich.

submitted in June 1983 to Ancient T. L.

R Rowlett, P. Drury, C.. Peters, " Thermoluminescence of l>

Lightening Struck Soil", Ancient TL, June 1983.-

J.* Vogt, C. Graham, M. Glascock, R. Cobean', " Determination of Elemental Compositions of Mesoamerican Obsidian Sources by

'l.

Neutron Activation Analysis" Actas de Sympesio "La Obsidiana En7ksoamerica, Pachuca, Hidalgo, Mexico", in press.

u J. Vogt, C. Graham, R. Cobean, M. Glascock, D. Ives, " Sources.,

~

of Error in the Trace Element Characterization of Lithic 5

Materials", Actas de Coloquis "Perspectivas en el Estudio de la

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Litica, Mexi.co City", in press.

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J. Vogt C. Graham, M. Glascock, R. Cobean, "A Study of l

Mesoamerican Dbsidian Sources Using Activation Analysis", J.

Radioanal. Chem. g, 271, 1982.

Neutron Scattering R. Alkire, W. Yelon, J. Schneider, " Determination of the Ab-solute Structure Factor for the Forbidden (222) Reflection in Silicon Using 0.121 y. rays, Phys. Rev., B26, 3097-3104,1982.

_ R. Alkire, W. Yelon, " Design and Performance of a Gamma-ray 14 362, 1982.

Dif f ractometer at 0.12 A", J. Appl. Cryst.

T. Brun, 'J. Jorgensen, M. Misawa, F. Rotella, S. Susm:n, D.

1 Mildner, " Defects and Disorder in the Fast-lon Electrode.

j Lithium-Aluminum", J. Electrochem. Soc., 129, 2509-2517, 19B2.

Yelon, "A Powder Neutron Dif-C. Crowder, B. Kebe, W. James, W.

fraction Study of Antiferromagnetism in Er6 n23 23", heutron M

D 318-320, 1982.

Scattering 1981 AIP Conference Proceedings, Crowser, W. James, W. Yelon, " A Powder Neutron Diff raction Structure at 298 and 77*K", J. Appl.

C:

Phys., 53, 2637,198{4.5 Study of LaNi 4.5Al 0 C. Crowder, W. James, W. Yelon, "A Powder Neutron Diffraction Structure at 298 and 77'K",2 02 Appl.

O D AI.5 4.5 Study of LaNi4.5 Phys., 53, 2637, 1982.

Yelon, " Magnetic and C. Crowder, B. Kebe, W. James, W.

Structural Properties of Y Mn23 23", The Rare Earths in Modern 6

D Sci. & Tech.

Vol. III, 473, Plenum Publishing, New York,1982.

B. DeCrop, J. Deportes, B. Kebe, C. Crowder, W. James, W. Yelon,

" Magnetic Properties of ErM : M = (Ni, Fe, Co)" The Rare Earths 3

j in Modern Sci. 8 Tech., Vol. 111, 361, Plenus Publishing, New

/

York, 1982.

E. Epperson, D. Mildner, H. Chen, "The Decompcsition of a Ni-12.5 at % Si Alloy", Neutron Scattering 1981 AIP' Conference Pro-ceedings 392-294, 1982.

P. Hall, D. Mildner, R. Borst, " Pore Size Distribution of Shale 1

Rock by Small Angle Neutron Scattering", App. Phys. Lett.

J. Herbst, J. Croat, W. Yelon, "Crystall'ographic and Magnetic 53 250, 1982.

Ordering in Nd (Co Fe3.x)17", J. Appl. Phys.

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v J. Herbst, T. Croat, W. Yelon, B. van Laar, "The t'agnetic Structure of Er6 e23", J. Appl. Phys.

F H. Kaiser, S. Werner, E. George, " Direct Measurement of the Longitudinal Coherence length of a Thermal Neutron Beam", Phys.

Rev. Lett. 50, 560-563, 1982.

B. Kebe, C. Crowder, W. James, J. Deportes, R. Lemaire, W.

Yelon, '" Evidence for the Non-Collinearity of the Magnetic 5tructure of Er6 n23", The Rare Earths in Modern Sci.1 Techn.,

M Vol. 111, 377, Plenum Publishing, New York,1982.

H. Kim, 8. Danner, " Lattice Vibrations of a Monolayer of

~

r n-Butane Adsorbed on Graphite", J. Chem. Pnys. 77, 4169, 1982.-

A. Klein, S. Werner, " Neutron Optics", Rep. Prog. Phys., 46, 259-335, 1982.

A. Krawitz, E. Drake, R. DeGroot, C. Vasel, W. Yelon, " Neutron Diffraction Studies of Cemented Carbide Composites", Science of Hard Paterials, Plenum Press, pp. 973-990, 1983. -

A. Krawitz, J. Brune, M. Schmank, " Measurement of Stress in the Interior of Solids with Neutrons", Sagamore Army Patis. Conf.,

Plenum Press, Vol. 28, 139-156, 1982.

A. Levi, A. Burger, M. Schieber, W. Yelon R. Alkire, ". improved Nuclear Radiation Detectors by Machine Fabrication of H Ig2 Cleaving", Jerusalem Workshop on H 1g 2.(June 1982), Nucl.

Instrum. & Meth., 213, 31, 1983.

C. McCarthy, C. Tompson, F. Ross, 2. Fisk, " Structure and Magnetic Properties of TbB ", Neutron Scattering 1981 AIP 4

Conference Proceedings, 327-329, 1982.

D. Mildner, " Comments on Sc311-Angle Scattering at a Pulsed Neutron Source: Comparison With a Steady State Reactor",

J. Appl. Cryst.

~

D. Mildner, " Neutron Gain for Converging Guide Tubes", Nucl. In-str. & Peth., 200, 167-173, 1982.

i D. Mildner, " Efficient use of Two-Dimensional Detectors for Small Angle Neutron Scattering Contours from Polymers Under External Constraint", Macromolecules,16 in press,1983.

K. Poepplemeier, M. Leonowicz, J. Scanlon, J. Longo, W. Yelon, j

" Structure Determination of CaMn03 and CaMn0.5 by X-Ray and 2

Neutron Methods", J. Solid State Chem. 3,711982.

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6

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F. Ross, W. Yelon, "The Scintillation Counter and Other Solid State Detectors", Trans. ACA g, 127-139, 1982.

F. Rqss, W. Yelon, "The Stinti11ation Counter and Other Solid State' Detectors", Trans. ACA y, 127-139, 1982.

~~

M. Sefcik, J. Schaefer, E. Desa, W. Yelon, " Effects of Sorbed Gasses 'on the Molecular Dynamics and Structure of Glassy Polyiners", Am. Chem. Soc. 24, 85, 1983.

W. Yelon, M. Crow, S. Nha, C. Holmes, G. Schupp, "A High Intensity Mossbauer Instrument", Proceedings of the Indian National Academy, Pnysical Sciences-Special Volume XVII, VII, 1982.

G. Summerfield, D. Mildner, J. Carpenter, " Mixing of Phases in Non-Crystalline Materials: Application to Carbon", J.

Non-Cryst. Solids.

G. Summerfield, D. Mildner, "Small Angle Scattering with Azi-muthal Asymmetry", J. Appl. Cryst., H, 384-389.

~

P. Hall, D. Mildner, "On the Analysis of Small Angle Stattering with Azimuthal Symmetry", J. Appl. Phys., y,,427-428,1983.

B. van I.aar, W. Yelon, "The Peak in Neutron Powder Dif tr, action",

Submitted to J. Appl. Cryst.

T. van Schalkwyk, W. James, C. Crowder, W. Yelon, "The Effect of Stoichiometric Variations on the Magnetic Structure of the Intermetallic Compound Y Mn23", 28th Conf. on Magnetism and 6

Magnetic Materials, Montreal, Canada (July 1982), J. Appl. Phys.

(to be published).

R. Wang, H. Taub, H. Shechter, R. Brener, J. Suzanne, F. Hansen, "Orientational Ordering of Commensurate Fe(CO)5 Monolayers on Graphite", Pnys. Rev. B27, 5864,1983.

R. Word, S. Werner, "A Phonon Density of States Effect in Resonant Neutron Interferometry: Theory and Measurement for Isotropically Pure Samarium 149", Phys. Rev.- 826, 4190-4198, 1982.

R. Word, T. Trammel, "The Potential of Resonant Neutron Scattering as a Condensed Matter Probe" Neutron Scattering L

1981 Al Conference Proceedings, 141-143.

R. Word, S. Werner, " Neutron Interferometric Measurement of the Real Part of the Scattering 1.engths of Natural and Isotopically Pure Sm-149", Neutron Scattering 19b1 AIP Conference Proceedings, 144-145, 1982.

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g.

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T. Wu, J. Cohen, W. Yelon, "Phonon Dispersion and the Ther-

. codynamic Properties of a Au-Ni Alloy", Acta Metall. ),0, 2065-2070, 1982.

r W. Yelon, B. van Laar, F. Paniawski, S. Kaprzyk, " Treatment of Seconpary Extinction and Multiple Scattering in Polarized Neutron Scattering, An Improved Vethod, I Pethod". Acta Cryst..,

in press.

W. Yelon; B. van Laar, F. Maniawski, S. Kaprzyk, " Treatment of Secondary Extinction and Multiple Scattering in Polarized Neutron Scattering, An Improved Pethod 11 Application to Nickel", Acta Cryst, in press'.

W. Yelon,' B. van Laar, iSecondary Extinction and Absolute Structure Factors in X-ray Diffraction: Determination by Polarization Variation" Acta Cryst., submitted.

W. Yelon, F. Ross, " Gar.rna Ray Crystallography and Related Techniques", Nuclear Inst. and Methods, 193, 285-292, 1982.

M. Yethiraj, S. Werner, W. Yelon, J. Honig, " Phonons in V 02 3 and Tip0 ", Neutron Scattering - 1981 AIP Confe.rence Proceedings, 3

343-345, 1982.

Radiation Effects J. Farmer, D. Lamp, J. Meese, " Charge Transient Spectroscopy",

Appl. Pnys. Lett., 41, 1063-1065, 1982.

J. Farmer, J. Meese, " Deep Level Transient Spectroscopy of l

Neutron Irradiated Semiconductors", J. Nucl. Materials,107 700-714, 1982.

C. D. Lamp, J. W. Fariner, J. M. Meese, " Uniaxial Stress Apparatus for DLTS Studies", Submitted to Rev. Sci. Instrum.

J. Meese, " Processing of Semiconductor Materials and Devices by Neutron Irradiation", J. Nucl. Materials, 108 & 109, 715-725, 1982.

J. M. Peese, J. W. Fariner, C. D. Lamp, " Defect Symmetry from Stress Transient-Spectroscopy", Phys. Rev. Lett., Oct. 3,1983.

i S. Thaler, H. Chandrasekhar, M. Chandrasekhar, J. Meese, "A Detailed Annealing Study of NTD-Si Utilizing Raman Scattering",

Neutron Transmutation Doping in Semiconductors, ed. by R. Larrabee, Plenum Press, N.Y.

s

..S e

m_

s i

s..

E. T. Garwitz, A. W. Jongs, "The Ef fects of DIDS and Anion Substitution on Arctic 3'Cl Turnover in Aldosterone-induced Hypertensive Rats", Recent Advances in Hypertension Mechanisms.

~

M. Sambhi & H. Villarreal, ecs. hew lork, KPN lhr0R/McDI A corp.

5. Th'aler, H. Chandrasekhar, M. Chandrasekhar..J. Meese.

j

" Suggested Annealing Mechanisms in Neutron Irradiated Silicon",

l Defects and Radiation Effects in Semiconductors, ed. by l

R. Larranee Plenum Press, N.Y.

j

~

i H. Yousif, D. Cowan, J. Meese, Cluster Center Formation in

' Neutron Damages. Silicon", J. Appl. Phys., submitted.

Radioisotopes P. Aaronson, A. Jones, " Effects of Forskolin and Diltiazem on l

Polyionic Fluxes in Rabbit Arterial Smooth Muscle", Fed. Proc.

_42:3546, 1983.

J. Brannon, "The Degree of Heterogeneity in Basalts Near the Hayes Fracture Zone, Mid-Atlantic Ridge: Holes 561', 562 and 564 of Leg 82, DSDP", Deep Sea Drill. Proj. Initial Rep. 82.

M. 5. Chi A. W. Jones, R. H. Freeman, " Effects of Reduced Renal J

Mas:;-c.'IK Flux in the Aorta of Hypertensive Rats", Fed. Proc.

42:3519, 1983.

P. Datta, A. W. Jones, " Altered Calcium Movements in the Aorta of the Rat During Deoxycorticosterone Acetate Hypertension",

submitted.

G. Ehrhardt, W. Volkert, W. Goeckeler, D. Kapsch, "A New J

Cd-115/In-115m Radionuclide Generator" J. of Nucl. Med. 24, t

349-352, 1983.

1

6. Ehrhardt, M. Li, W. Goeckeler, S. Benner, "A New Cd-109/Ag-109m Generator System", Proceedings of the Second International Symposium on Single Photon Ultrashort-lived I.

Radionuclides, in press. -

E. T. Garwitz, A. W. Jones, " Chloride Exchan9e Diffusion in Arterial Smooth Muscle from Aldosterone Hypertensive Rats". Fed.

f I

Proc. 4,2:5162, 1983.

E. T. Garwitz, A. W. Jones, " Altered Electrolyte Transport i

During Aldosterone-induced Hypertension in the Rat", in Cellular Handling of Ions, Transmitter Release, Mineralocorticoids.

5mootn Muscle contract 111ty and Hypertension.

5. Berglund and B. Hood, eds. Malmo Swede, 5earle, pp. 133-142, 1983.

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E. T. Garwitz, A. W. Jongs, "The Effects of DIDS and Anion 30C1 Turnover in Aldosterone-induced Substitution on Arctic Hypertensive Rats", Recent Advances in Hypertension Mechanisms.

KPr: Ihrok/M:.DI A corp.

M.' Sambhi & H. Villarreal, eos. New tort, A. W. Jones, D. B. Bylund, L. R. Forte, D. Shinholster,

)

"Inhitiitory Action of Forskolin on 16repinephrine Stimulated 3548, -

lonic Fluxed f rom Vascular Smooth Muscle" Fed. Proc. 3:

1983.

A. W. Jones, " Arterial Tissue Cations" In Hypertension:

~

Physiopathology and Treatment.

J. Genest, O. Kuchel, P. Hamel &

M. Cantin, eds. New York, McGraw Hill.

A. W. Jon'es, J. M. Smit, D. B. Bylund, E. T. Garwitz, " Membrane Transport in Vascular Smooth Muscle and its Relation to Normal and Altered Excitation During Hypertension", submitted. R. Korotev, M. Lindstrom, D. Lindstrom, L. Haskin, " Antarctic Meteorite ALHA81005-Not Just Another Lunar Anorthositic Norite", Geophys. Res. Lett. R. Korotev, " Comparative Geochemistry of Apollo 16 Surfaces Soils and Samples From Cores 64002 and 60002 Through 60007", Proc. Lunar Planet. Sci. Conf.13th, J. Geophys. Res. 87, A262-%278. M. Li, "A Brief Review of Commonly Used Radionuclide ner-ators", in preparation. M. Lindstrom, P. Salpas, " Geochemical Studies of Feldspathic Fragmental Breccias and the Nature of North Ray Carter Ejecta", Proc. Lunar Planet. Sci. Conf.13th, J. Geophys. Res. 88,, A671-683. i g H. Mullen, "The Role of T Cell in Induction of B Hemory Cells", I Cellular Imunology, 68, 234-243, 1982. J. M. Smith, A. W. Jones, " Pharmacologic analysis of the basis , for Norepinephrine Supersensitivity in Aldosteron Hypertensive Rats", Fed. Proc. 3:1918, 1983. D. H. Warden, A. W. Jones, " Temperature. Dependence of lonic Transport and Norepinephrine Stimulation of Rat Aorta During i Deoxycorticosterone Acetate Hypertension", submitted. 86Rb Efflux and H. Yamamoto, R. A. Harris, " Calcium-Dependent Studies of Human Red Biced Cells and Ethanol intoxications: Rodent Brain Synaptosomes", European Journal of Pharmacology, i _EB, 357-353, 1982. ..) i

Instrument Development R. Berliner, J. Sudol, G. Moum, "A Multi-microprocessor Neutron Spectrometer Computer Interf ace System", Nucl. Inst. & Meth. Neutron R'adiography J. Lindsay, D. Alger, W. Miller, S. ' Bull, "MTF Analysis of the - MURR. Real-Time Neutron Radiography Facility", Proceeding of the' First World Conference on Neutron Radiography, San Diego, CA, December 1981. Nuclear Engineering D. Alger, " Upgrade of MURR Neutron Source", Proceedings of this meeting. Y. Fujita, T. Dhsawa, R. Brugger, D. Alger, W. Miller, " Measurement of the Inelastic Scattering Cross Section of Thorium-232 for 144 kev Silicon Filtered Neutrons", J. of Nuclear Science and Technology,1983. Y. Fujita, R. Brugger, D. Alger, W. Miller, " Measurement of the Relationship Between the Doppler and the Self-Shielding Effects 232Th for 24 kev Iron-Filtered in the Total Cross Section of Neutr.ons", J. of Nuclear Science and Technology,1983. J. Korsah, W. Miller, " Derivative Pethod Unf olding of Gamma-Ray Spectra from NE213 Spectrometers", IEEE Transaction on N.S. W. Miller, W. Law, R. Brugger, " Thermal Neutron Driven 14.1 MeV Neutron Generator". Nucl. Instr. & Meth.,1983. W. Miller, J. Sohl, R. Brugger, " Experimental Tests of the Bonner Sphere Spectrometer Using Filtered Beams", Nucl. Inst. & 5 Meth. Nuclear Science 60. Choe, G. Schupp, "K-Shell Ionization in the S J. Kim, S. Nhe s Co", Phys. Rev. C27, 804,1983. Beta Decay of i l " Double K-Shell lonization in the Electron H. Nagy, G. Schupp l Capture Decays of gSZn", phys. Rev. C27, 2887,1983. H. Na "K-Shell Electron Shakeoff in the

5. Nha, G. Schupp,5B o",gy, Phys. Rev. C27,1276,1983.

Positron Decay of C 4

5. Nha, G. Schupp, H. Nagy, "K-Shell lonization in the Positron 65 n", Phys. Rev. C27, 2879,1983.

Z Decay of t s } n}}