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Polarized targets and polarized low energy neutrons at WNR

Description: A description of the experimental setup used at the WNR facility to study the interaction of polarized neutrons with polarized samples is given. Planned measurements of the magnetic moments of compound nuclear resonances are discussed.
Date: January 1, 1980
Creator: Delheij, P. P. J.; Morgan, G. L. & Lisowski, P. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Polarized neutron beam at LAMPF

Description: The polarization of neutrons produced from the reaction pd ..-->.. anti n was measured at a laboratory angle of 20/sup 0/ at an incident proton kinetic energy of 800 MeV. For the highest energy neutron peak at approx. 665 MeV, as well as for the broad pion production peak at approx. 325 MeV, the neutron polarization has been found to be approx. 0.20. The measured polarization for the quasielastic process has been found to be in good agreement with the free np analyzing power measurements. Such … more
Date: January 1, 1980
Creator: Bhatia, T. S.; Glass, G. & Hiebert, J. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement of K/sub NN/, K/sub LL/ in p vector d. -->. n vector X and p vector /sup 9/Be. -->. n vector X at 800 MeV

Description: The spin transfer parameters, K/sub NN/ and K/sub LL/, have been measured in p vector d ..-->.. n vector X and p vector /sup 9/Be ..-->.. n vector X at 0/sup 0/ and 800 MeV. The rather large values of K/sub LL/ demonstrate that this transfer mechanism will provide a useful source of polarized neutrons at LAMPF energies.
Date: January 1, 1980
Creator: Riley, P.J.; Hollas, C.L. & Newsom, C.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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B-10 analysis

Description: A method was developed to determine if boron-loaded polymeric material contained enriched boron or natural boron. A prototype analyzer was constructed, and initial planning was done for an actual analysis facility.
Date: February 1, 1980
Creator: Holland, W.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mechanisms affecting swelling in alloys with precipitates

Description: In alloys under irradiation many mechanisms exist that couple phase instability to cavity swelling. These are compounded with the more familiar mechanisms associated with point defect behavior and the evolution of microstructure. The mechanisms may be classified according to three modes of operation. Some affect cavity swelling directly by cavity-precipitate particle association, others operate indirectly by precipitate-induced changes in sinks other than cavities and finally there are mechanis… more
Date: January 1, 1980
Creator: Mansur, L.K.; Haynes, M.R. & Lee, E.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pulsed neutron sources for condensed-matter research

Description: The efforts around the world to provide higher neutron intensities are now focussed on accelerator-driven spallation sources in which neutrons are produced by bombardment of heavy metal targets with high energy protons. Spallation sources can be pulsed or quasi-continuous depending on the nature of the proton accelerator. Pulsed spallation sources, based on rapid cycling synchrotrons or storage rings, are especially attractive since a moderate average proton current (10/sup -5/ - 10/sup -3/A) c… more
Date: January 1, 1980
Creator: Price, D.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ADIP ORNL contribution: 12th ADIP quarterly progress report for period October-December 1980. [Nb-1Zr]

Description: The following ADIP tasks are reported on: MFE-5 in-reactor fatigue crack growth in 316 SS in ORR, titanium alloy tensile properties after neutron irradiation in EBR-II, voids in neutron-irradiated Ti alloys, fabrication of ferritic alloys for RB-1 experiment in HFIR, microstructural examination of commercial ferritic alloys irradiated to very high fluence, microstructural examination of HT-9 archive material from the AD-2 test, and swelling of commercial alloys irradiated to a very high fluence… more
Date: January 1, 1980
Creator: Puigh, R.; Duncan, D.; Ermi, A.M.; Gelles, D. & Zimmerchied, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Voids in neutron-irradiated metals and alloys

Description: Small-angle x-ray and neutron scattering are powerful analytical tools for investigating long-range fluctuations in electron (x-rays) or magnetic moment (neutrons) densities in materials. In recent years they have yielded valuable information about voids, void size distributions, and swelling in aluminum, aluminum alloys, copper, molybdenum, nickel, nickel-aluminum, niobium and niobium alloys, stainless steels, graphite and silicon carbide. In the case of aluminum, information concerning the sh… more
Date: January 1, 1980
Creator: Hendricks, R.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Structure and composition of phases occurring in austenitic stainless steels in thermal and irradiation environments

Description: Transmission electron diffraction techniques coupled with quantitative x-ray energy dispersive spectroscopy have been used to characterize the phases which develop in austenitic stainless steels during exposure to thermal and to irradiation environments. In AISI 316 and Ti-modified stainless steels some thirteen phases have been identified and characterized in terms of their crystal structure and chemical composition. Irradiation does not produce any completely new phases. However, as a result … more
Date: January 1, 1980
Creator: Lee, E. H.; Maziasz, P. J. & Rowcliffe, A. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement of uranium and plutonium in solid waste by passive photon or neutron counting and isotopic neutron source interrogation

Description: A summary of the status and applicability of nondestructive assay (NDA) techniques for the measurement of uranium and plutonium in 55-gal barrels of solid waste is reported. The NDA techniques reviewed include passive gamma-ray and x-ray counting with scintillator, solid state, and proportional gas photon detectors, passive neutron counting, and active neutron interrogation with neutron and gamma-ray counting. The active neutron interrogation methods are limited to those employing isotopic neut… more
Date: March 1, 1980
Creator: Crane, T. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Induced magnetization density in the 5f system UA1/sub 2/

Description: A polarized-neutron diffractometer was used to study the induced magnetization density in the unit cell of the 5f system UA1/sub 2/. Measurements have been made on single crystals at 4.2/sup 0/K with an applied magnetic field of 42.5 KOe (induced magnetic moment 0.0344 ..mu../sub B/ per mole). Neutron wavelengths of 1.067 and 0.785 A and different crystal thicknesses have been used to correct for and eliminate any effects from extinction. It is found that the major part of the magnetization den… more
Date: September 1, 1980
Creator: Rakhecha, V. C.; Lander, G. H. & Moon, R. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radiation-induced phase development in AISI 316

Description: During irradiation at temperatures between 460 and 650/sup 0/C, the alloy AISI 316 decomposes into an austenite matrix of altered composition and some mixture of six possible precipitate phases. These phases are ..gamma..', G, eta-silicide, M/sub 23/C/sub 6/, M/sub 6/C, and Laves. The balance of phases developed is exceptionally sensitive to a large number of material and environmental variables and frequently varies within a single grain. All of these phases are found to be either naturally ri… more
Date: September 1, 1980
Creator: Yang, W. J. S.; Brager, H. R. & Garner, F. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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