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2,028 Matching Results
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Two Dimensional Simulations of Plastic-Shell, Direct-Drive Implosions on OMEGA
Multidimensional hydrodynamic properties of high-adiabat direct-drive plastic-shell implosions on the OMEGA laser system [T. R. Boehly et al., Opt. Commun. 133, 495 (1997)] are investigated using the multidimensional hydrodynamic code, DRACO. Multimode simulations including the effects of nonuniform illumination and target roughness indicate that shell stability during the acceleration phase plays a critical role in determining target performance. For thick shells that remain integral during the acceleration phase, target yields are significantly reduced by the combination of the long-wavelength ({ell} < 10) modes due to surface roughness and beam imbalance and the intermediate modes (20 {le} {ell} {le} 50) due to single-beam nonuniformities. The neutron-production rate for these thick shells truncates relative to one-dimensional (1-D) predictions. The yield degradation in the thin shells is mainly due to shell breakup at short wavelengths ({lambda} {approx} {Delta}, where {Delta} is the in-flight shell thickness). The neutron-rate curves for the thinner shells have significantly lower amplitudes and a fall-off that is less steep than 1-D rates. DRACO simulation results are consistent with experimental observations.
Date:
September 27, 2004
Creator:
Radha, P. B.; Goncharov, V. N.; Collins, T. B.; Delettrez, J. A.; Elbaz, Y.; Glebov, V. Y. et al.
Object Type:
Article
System:
The UNT Digital Library
[News Script: Management consultant's new venture]
Script from the WBAP-TV/NBC station in Fort Worth, Texas, relating a news story.
Date:
November 27, 1970, 10:00 p.m.
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Script
System:
The UNT Digital Library
RAPID DETERMINATION OF ACTINIDES IN URINE BY INDUCTIVELY-COUPLED PLASMA MASS SPECTROMETRY AND ALPHA SPECTROMETRY: A HYBRID APPROACH
A new rapid separation method that allows separation and preconcentration of actinides in urine samples was developed for the measurement of longer lived actinides by inductively coupled plasma mass spectrometry (ICP-MS) and short-lived actinides by alpha spectrometry; a hybrid approach. This method uses stacked extraction chromatography cartridges and vacuum box technology to facilitate rapid separations. Preconcentration, if required, is performed using a streamlined calcium phosphate precipitation. Similar technology has been applied to separate actinides prior to measurement by alpha spectrometry, but this new method has been developed with elution reagents now compatible with ICP-MS as well. Purified solutions are split between ICP-MS and alpha spectrometry so that long- and short-lived actinide isotopes can be measured successfully. The method allows for simultaneous extraction of 24 samples (including QC samples) in less than 3 h. Simultaneous sample preparation can offer significant time savings over sequential sample preparation. For example, sequential sample preparation of 24 samples taking just 15 min each requires 6 h to complete. The simplicity and speed of this new method makes it attractive for radiological emergency response. If preconcentration is applied, the method is applicable to larger sample aliquots for occupational exposures as well. The chemical recoveries are typically …
Date:
May 27, 2009
Creator:
Maxwell, S. & Jones, V.
Object Type:
Article
System:
The UNT Digital Library
[News Clip: TCU tricycle]
Video footage from the WBAP-TV station in Fort Worth, Texas, covering a news story about tricycle races at TCU's Parents Day. Women representing different sororities compete in the races.
Date:
October 27, 1956
Creator:
WBAP-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Interpolation of probability densities in ENDF and ENDL
Suppose that we are given two probability densities p{sub 0}(E{prime}) and p{sub 1}(E{prime}) for the energy E{prime} of an outgoing particle, p{sub 0}(E{prime}) corresponding to energy E{sub 0} of the incident particle and p{sub 1}(E{prime}) corresponding to incident energy E{sub 1}. If E{sub 0} < E{sub 1}, the problem is how to define p{sub {alpha}}(E{prime}) for intermediate incident energies E{sub {alpha}} = (1 - {alpha})E{sub 0} + {alpha}E{sub 1} with 0 < {alpha} < 1. In this note the author considers three ways to do it. They begin with unit-base interpolation, which is standard in ENDL and is sometimes used in ENDF. They then describe the equiprobable bins used by some Monte Carlo codes. They then close with a discussion of interpolation by corresponding-points, which is commonly used in ENDF.
Date:
January 27, 2006
Creator:
Hedstrom, G
Object Type:
Report
System:
The UNT Digital Library
Water Sorption and Gamma Radiolysis Studies for Uranium Oxides
During the development of a standard for the safe, long-term storage of {sup 233}U-containing materials, several areas were identified that needed additional experimental studies. These studies were related to the perceived potential for the radiolytic generation of large pressures or explosive concentrations of gases in storage containers. This report documents the results of studies on the sorption of water by various uranium oxides and on the gamma radiolysis of uranium oxides containing various amounts of sorbed moisture. In all of the experiments, {sup 238}U was used as a surrogate for the {sup 233}U. For the water sorption experiments, uranium oxide samples were prepared and exposed to known levels of humidity to establish the water uptake rate. Subsequently, the amount of water removed was studied by heating samples in a oven at fixed temperatures and by thermogravimetric analysis (TGA)/differential thermal analysis (DTA). It was demonstrated that heating at 650 C adequately removes all moisture from the samples. Uranium-238 oxides were irradiated in a {sup 60}Co source and in the high-gamma-radiation fields provided by spent nuclear fuel elements of the High Flux Isotope Reactor. For hydrated samples of UO{sub 3}, H{sub 2} was the primary gas produced; but the total gas pressure …
Date:
February 27, 2002
Creator:
Icenhour, A.S.
Object Type:
Report
System:
The UNT Digital Library
The Oklahoma Daily (Norman, Okla.), Vol. 94, No. 120, Ed. 1 Friday, March 27, 2009
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 27, 2009
Creator:
Simons, Meredith
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Lamar University Press (Beaumont, Tex.), Vol. 29, No. 15, Ed. 1 Friday, October 27, 1978
Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local and campus news along with advertising.
Date:
October 27, 1978
Creator:
Shockley, Tara
Object Type:
Newspaper
System:
The Portal to Texas History
The Optimist (Abilene, Tex.), Vol. 32, No. 31, Ed. 1, Friday, April 27, 1945
Weekly student newspaper from Abilene Christian College in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
April 27, 1945
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Oklahoma Daily (Norman, Okla.), Vol. 40, No. 123, Ed. 1 Saturday, March 27, 1954
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 27, 1954
Creator:
Logan, Kuyk
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The War Whoop (Abilene, Tex.), Vol. 55, No. 8, Ed. 1, Thursday, October 27, 1977
Weekly student newspaper from McMurry College in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
October 27, 1977
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Oklahoma Daily (Norman, Okla.), Vol. 15, No. 8, Ed. 1 Saturday, September 27, 1930
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes local and campus news along with advertising.
Date:
September 27, 1930
Creator:
Pearce, Dick
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Daily (Norman, Okla.), Ed. 1 Thursday, April 27, 1922
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes local and campus news along with advertising.
Date:
April 27, 1922
Creator:
Nettleton, Tully A.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Redbird (Beaumont, Tex.), Vol. 7, No. 2, Ed. 1 Friday, September 27, 1957
Weekly newspaper from Lamar State College of Technology in Beaumont, Texas that includes local and campus news along with advertising.
Date:
September 27, 1957
Creator:
Barnes, Dorothy
Object Type:
Newspaper
System:
The Portal to Texas History
University Press (Beaumont, Tex.), Vol. 63, No. 34, Ed. 1 Friday, March 27, 1987
Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local and campus news along with advertising.
Date:
March 27, 1987
Creator:
Faulkner, Georganne
Object Type:
Newspaper
System:
The Portal to Texas History
The Redbird (Beaumont, Tex.), Vol. 18, No. 7, Ed. 1 Friday, October 27, 1967
Weekly newspaper from Lamar State College of Technology in Beaumont, Texas that includes local and campus news along with advertising.
Date:
October 27, 1967
Creator:
Goode, Charles
Object Type:
Newspaper
System:
The Portal to Texas History
The University Press (Beaumont, Tex.), Vol. 26, No. 16, Ed. 1 Friday, February 27, 1976
Semiweekly newspaper from Lamar University in Beaumont, Texas that includes local and campus news along with advertising.
Date:
February 27, 1976
Creator:
Daniels, Cheryl
Object Type:
Newspaper
System:
The Portal to Texas History
Lamar Tech Redbird (Beaumont, Tex.), Vol. 12, No. 24, Ed. 1 Friday, April 27, 1962
Weekly newspaper from Lamar State College of Technology in Beaumont, Texas that includes local and campus news along with advertising.
Date:
April 27, 1962
Creator:
Stark, Molly & Hair, Floyd
Object Type:
Newspaper
System:
The Portal to Texas History
The Oklahoma Daily (Norman, Okla.), Vol. 25, No. 79, Ed. 1 Thursday, January 27, 1949
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
January 27, 1949
Creator:
Bert, Leon
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Lone Star Lutheran (Seguin, Tex.), Vol. 51, No. 18, Ed. 1 Friday, February 27, 1970
Student newspaper from Texas Lutheran College in Seguin, Texas that includes news of interest to students and staff along with advertising.
Date:
February 27, 1970
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Oklahoma Daily (Norman, Okla.), Vol. 62, No. 134, Ed. 1 Saturday, March 27, 1976
Student newspaper of the University of Oklahoma in Norman, Oklahoma that includes national, local, and campus news along with advertising.
Date:
March 27, 1976
Creator:
Williams, Grant
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The North Texas Daily (Denton, Tex.), Vol. 54, No. 102, Ed. 1 Tuesday, April 27, 1971
Daily student newspaper from the North Texas State College in Denton, Texas that includes local, state, and campus news along with advertising. Formerly The Campus Chat.
Date:
April 27, 1971
Creator:
Kelly, Terry
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 104, No. 10, Ed. 1 Thursday, March 27, 2014
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
March 27, 2014
Creator:
Howard Payne University
Object Type:
Newspaper
System:
The Portal to Texas History
The Optimist (Abilene, Tex.), Vol. 89, No. 18, Ed. 1, Friday, October 27, 2000
Tri-weekly student newspaper from Abilene Christian University in Abilene, Texas that includes local, state and campus news along with advertising.
Date:
October 27, 2000
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History