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1,191 Matching Results
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INTERACTIONS OF DETONATION WAVES IN CONDENSED EXPLOSIVES
None
Date:
January 1, 1965
Creator:
Gardner, S.D. & Wackerle, J.
Object Type:
Report
System:
The UNT Digital Library
Proton Capture Gamma Rays From Si$Sup 28$ in the Region of the Photonuclear Giant Resonance
The Livermore 90 deg inch variable-energy cyclotron was used to measure the 90 deg excitation function for the Al/sup 27/(p, gamma )Si/sup 28/ reaction. Proton energies between 5 and 13 Mev were used which gave excitation energies in Si/sup 28/ corresponding to the region of the photonuclear giant resonance. Two gamma rays were observed: gamma /sub O/, the groundstate gamma ray and gamma / sub 1/ resulting from deexcitation through the first excited state of Si/sup 28/ at 1.78 Mev. They were detected by a 5-in.-diam by 6-in.-long NaI(Tl) crystal. A Pb collimator was used to improve the resolution of the detector. The results indicated that both gamma /sub O/ and gamma /sub 1/ display the giant resonance behavior; the gamma /sub O/ carve reached a peak value of approximately -8 mu barns/sr at E/sub p/ = 8.75 Mev, while the gamma /sub 1/ peak was approximately -14 mu barns/sr at E/sub p/ = 10 Mev. Both curves displayed the fine structure previously reported by Gove et al. A detailed balance calculation was made, using the gamma /sub O/ data. A comparison with the measurements of Johansson on the total yield of protons from the Si/sup 28/( gamma ,p)Al reaction …
Date:
May 1, 1961
Creator:
Gardner, C. C.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
THE HEAT TREATMENT OF PLUTONIUM
Two groups of plutonium bars, one group containing 165 ppm iron and the other 678 ppm iron were end-quenched from the beta, gamma, delta, delta-prime, and epsilon phases. In general, cooling rate was found to have three striking effects on microstructure. The alpha grain size was found to decrease with increasing cooling rate during cooling from all phases. Upon cooling high-iron plutonium from the epsilon phase, the size of the Pu--Pu6/sub 6/Fe eutectic network decreased with increasing cooling rate. Cooling high-iron plutonium from temperatures between 413 and 460 deg C produced a wide variety of Pu --Pu/sub 6/ Fe configurations in the microstructure. Finally, the size of an unidentified spheroidal inclusion, soluble in the delta and higher temperature phases, decreased as cooling rate increased across the delta to gamma transformation. These effects of cooling rate can be used to indicate the cooling rate or thermal history that a particular plutonium specimen has encountered. A linear relationship between the alpha grain size and the Pu--Pu/sub 6/Fe eutectic network size was observed. The network size was roughly two times larger than the alpha grain size. Hardness traverses on each of the bars indlcated no apparent effect of coollng rate during quenchlng on …
Date:
February 1, 1961
Creator:
Gardner, H.R.
Object Type:
Report
System:
The UNT Digital Library
Physical and Mechanical Metallurgy Studies on Delta-Stabilized Plutonium- Gallium Alloys
None
Date:
April 1, 1965
Creator:
Gardner, H. R.
Object Type:
Report
System:
The UNT Digital Library
THE IMPACT PROPERTIES OF UNALLOYED PLUTONIUM
The effect of temperature on the unnotched and notched Charpy impact properties of plutonium was studied in the alpha, beta, gamma, and delta phases encompassing a temperature range of -43 to 330 deg C. Impact energies for unnotched specimens generally increased with increasing test temperature in the alpha and beta phases. Brittle failures were obtained in these phases. The specimen tested in the gamma phase did not fracture but bcnt in ofi U-shape and pulled through the anvil. lmpact energies for the Charpy V-notched specimens were much lower than for the unnotched spcc(mens.dt corresponding temperatures. Brittle failures were obtained in the alpha and beta phases; some ductility was evidenced in the gamma phase while the specimen tested in the delta phase did not fracture but bent in a U-shape. It was concluded that the beta phase is quite sensitive to both strain rate and notch effects. Fracture appearance in the alpha and beta phase is discussed from the standpoint of grain boundary effects and microcracking. (auth)
Date:
October 1, 1961
Creator:
Gardner, H.R.
Object Type:
Report
System:
The UNT Digital Library
Role of Mass Selection and Mutagenic Treatment in Modern Corn Breeding.
None
Date:
January 1, 1969
Creator:
Gardner, C. O.
Object Type:
Report
System:
The UNT Digital Library
Compositional and Pressure Effects in the Plutonium-Gallium System
This report addresses the compositional and pressure effects in the plutonium-gallium system.
Date:
June 1, 1965
Creator:
Gardner, H.R.
Object Type:
Report
System:
The UNT Digital Library
The Gravimetric Determination of Hydrogen in Molybdenum Metal
None
Date:
January 1, 1965
Creator:
Gardner, R. D.; Ashley, W. H. & Bergstresser, P.
Object Type:
Report
System:
The UNT Digital Library
THEORY OF CORROSION PRODUCT GENERATION, DISPERSION, AND ACTIVATION PROCESSES.
None
Date:
January 1, 1968
Creator:
Bartlett, J.W.
Object Type:
Report
System:
The UNT Digital Library
IMPACT TESTS OF PLASMA FIRED $sup 238$PuO$sub 2$ MICROSPHERES.
None
Date:
January 1, 1969
Creator:
Dalby, W.J.
Object Type:
Report
System:
The UNT Digital Library
The Rockdale Reporter and Messenger (Rockdale, Tex.), Vol. 97, No. 18, Ed. 1 Thursday, May 1, 1969
Weekly newspaper from Rockdale, Texas that includes local, state, and national news along with advertising.
Date:
May 1, 1969
Creator:
Cooke, J. W.
Object Type:
Newspaper
System:
The Portal to Texas History
The Spectrophotometric Determination of Trace Amounts of Gallium in High-Purity Plutonium Metal
None
Date:
February 1, 1965
Creator:
Gardner, Ross D.; Apel, Charles T. & Ashley, William H.
Object Type:
Report
System:
The UNT Digital Library
Effects of gamma-ray irradiation on M1 propellant
Samples of M1 single-base propellant were exposed to 10{sup 5}, 10{sup 6}, and 10{sup 7}r of Co{sup 60} gamma rays. Burning rates were determined over a pressure range of 600 to 2600 psi at -40{degrees}, 21{degrees}, and 71{degrees}C. A statistical study indicated no significant change in the burning rate and a small but statistically significant increase (6%) in the exponential factor n after the 10{sup 7}r dose. Visible deterioration resulted, as the color changed from yellow to dark brown and the surface became uneven. In view of these marked visible effects, the slight change in burning rate is surprising. One sample exposed to 5 {times} 10{sup 8}r showed severe blistering, swelling, and contraction, and embrittlement causing fracture. Nitrogen Taliani tests conducted at 110{degrees}C indicated that the decomposition rate is decreased by exposure to 10{sup 5}r, is decreased less by 10{sup 6}r, and remains unchanged after 10{sup 7}r exposure. Chemical analysis showed that the percentage of 2-nitrodiphenylamine increases with dose by a factor of 7 at 10{sup 7}r, while, at the same time, the nitrogen content of the nitrocellulose decreases with increasing dose. This indicates that a substantial part of the nitrocellulose decomposition product had reacted with the diphenylamine stabilizer. It …
Date:
April 1, 1964
Creator:
Abel, J.E.; Mapes, J.E. & Levy, P.W.
Object Type:
Report
System:
The UNT Digital Library
THE INTERNAL FEEDBACK OF EBR-I MARK-III
None
Date:
February 1, 1960
Creator:
Carter, J. C.; Sparks, D. W. & Tessier, J. H.
Object Type:
Report
System:
The UNT Digital Library
IRRADIATION BEHAVIOR OF ZIRCALOY-2 CLAD THORIUM--URANIUM--ZIRCONIUM FUEL ELEMENTS. Interim Report No. 1.
None
Date:
January 1, 1967
Creator:
Goffard, J.W. & Marshall, R.K.
Object Type:
Report
System:
The UNT Digital Library
DESIGN STUDY [OF] ELECTRICAL COMPONENT TECHNOLOGY FOR 0.25 TO 10.0 MEGAWATT SPACE POWER SYSTEMS. POWER CONDITIONING: PARAMETRIC SCREENING STUDY.
None
Date:
January 1, 1967
Creator:
Swiderski, E. F. & Gyurek, J. W.
Object Type:
Report
System:
The UNT Digital Library
Hanford Radiological Sciences Research and Development Annual Report for 1964
None
Date:
January 1, 1965
Creator:
Pearce, D.W. & Green, J.K. (eds.)
Object Type:
Report
System:
The UNT Digital Library
Advanced SR-90 Space Power Supply Study
This report addresses details of the Advanced SR-90 Space Power Supply Study
Date:
January 1, 1964
Creator:
U.S. Atomic Energy Commission
Object Type:
Report
System:
The UNT Digital Library
SODIUM TECHNOLOGY SUPPORT PROGRAM FOR PACIFIC NORTHWEST LABORATORIES, BATTELLE MEMORIAL INSTITUTE FFTF STUDIES, FY 1965
None
Date:
July 1, 1965
Creator:
Simons, E. M.; Stang, J. H.; Basham, S. J.; Glaeser, W. A. & Bell, J. C.
Object Type:
Report
System:
The UNT Digital Library
$sup 252$Cf. Proceedings of a Symposium, New York City, October 22, 1968.
None
Date:
January 1, 1969
Creator:
Barker, J.J. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Transit Analysis.
None
Date:
January 1, 1969
Creator:
Holland, J. R.; Northrup, C. J. M., Jr.; Stark, W. A. & Williams, D. C.
Object Type:
Report
System:
The UNT Digital Library
Panhandle Herald (Panhandle, Tex.), Vol. 74, No. 7, Ed. 1 Thursday, September 1, 1960
Weekly newspaper from Panhandle, Texas that includes local, state, and national news along with extensive advertising.
Date:
September 1, 1960
Creator:
Collins, Richard W.
Object Type:
Newspaper
System:
The Portal to Texas History
Brayton-Cycle Radioisotope Heat Source Design Study, Phase I (Conceptual Design) Report.
None
Date:
January 1, 1967
Creator:
Robinson, R. A.; Beaver, R. J.; Burton, D. W.; Chapman, T. G.; Craven, C. W., Jr.; Ewing, S. T. et al.
Object Type:
Report
System:
The UNT Digital Library
The Data of Nuclear Reactor Physics. A Bibliography.
None
Date:
January 1, 1967
Creator:
Furnish, J.
Object Type:
Report
System:
The UNT Digital Library