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Measurement of energy deposited by charged-particle beams in composite targets
We have measured the energy deposited in two types of composite targets by a number of charged-particle beams: targets made of /sup 238/U, Lucite, and polyethylene were exposed to 0.26-GeV protons and 0.33-GeV deuterons, and aluminum-Lucite composites were exposed to 0.5-GeV electrons. In addition, we measured neutrons and gamma rays emitted from solid targets of various materials (including /sup 238/U and iron) exposed to 0.26-GeV protons and 0.33-GeV deuterons. We used passive detectors (thermoluminescence dosimeters, Lexan fission track recorders, and photographic emulsions) to measure the nonfission dose and the fission-fragment dose from the primary beam and its shower of products. Measurements were made at various depths and radial positions in the targets. Plots and numerical values of the measured doses are presented. The emission of neutrons and gamma rays was measured with a liquid-deuterated-benzene detector. In general, the dose profile with depth is similar for 0.26-GeV protons and 0.33-GeV deuterons. The ratio of return neutrons to gamma rays increases with increasing target mass number. Deuterons, however, produce from 1.7 to 5.8 times as many neutrons and gamma rays per particle as do protons.
Date:
July 2, 1980
Creator:
Farley, E.; Becker, J.; Crase, K.; Howe, R. & Selway, D.
Object Type:
Report
System:
The UNT Digital Library
Transducer characterization
This report has been prepared specifically for ultrasonic transducer users within the Nondestructive Testing Evaluation (NDE) community of the weapons complex. The purpose of the report is to establish an initial set of uniform procedures for measuring and recording transducer performance data, and to establish a common foundation on which more comprehensive transducer performance evaluations may be added as future transducer performance criteria expands. Transducer parameters and the problems with measuring them are discussed and procedures for measuring transducer performance are recommended with special precautionary notes regarding critical aspects of each measurement. An important consideration regarding the recommended procedures is the cost of implementation. There are two distinct needs for transducer performance characterization in the complex. Production oriented users need a quick, reliable means to check a transducer to ascertain its suitability for continued service. Development groups and the Transducer Center need a comprehensive characterization means to collect adequate data to evaluate theoretical concepts or to build exact replacement transducers. The instrumentation, equipment, and procedures recommended for monitoring production transducers are utilitarian and provide only that information needed to determine transducer condition.
Date:
July 2, 1980
Creator:
Cross, B. T.; Eoff, J. M.; Schuetz, L. J. & Cunningham, K. R.
Object Type:
Report
System:
The UNT Digital Library
Dissociative recombination of interstellar ions: electronic structure calculations for HCO/sup +/
The present study of the interstellar formyl ion HCO/sup +/ is the first attempt to investigate dissociative recombination for a triatomic molecular ion using an entirely theoretical approach. We describe a number of fairly extensive electronic structure calculations that were performed to determine the reaction mechanism of the e-HCO/sup +/ process. Similar calculations for the isoelectronic ions HOC/sup +/ and HN/sub 2//sup +/ are in progress. 60 refs.
Date:
July 2, 1985
Creator:
Kraemer, W.P. & Hazi, A.U.
Object Type:
Article
System:
The UNT Digital Library
Investigations of glass structure using fluorescence line narrowing and moleuclar dynamics simulations
The local structure at individual ion sites in simple and multicomponent glasses is simulated using methods of molecular dynamics. Computer simulations of fluoroberyllate glasses predict a range of ion separations and coordination numbers that increases with increasing complexity of the glass composition. This occurs at both glass forming and glass modifying cation sites. Laser-induced fluorescence line-narrowing techniques provide a unique probe of the local environments of selected subsets of ions and are used to measure site to site variations in the electronic energy levels and transition probabilities of rare earth ions. These and additional results from EXAFS, neutron and x-ray diffraction, and NMR experiments are compared with simulated glass structures.
Date:
July 2, 1982
Creator:
Weber, M. J. & Brawer, S. A.
Object Type:
Article
System:
The UNT Digital Library
[News Clip: KS storms]
B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date:
July 2, 1994, 6:00 p.m.
Creator:
KXAS-TV (Television station : Fort Worth, Tex.)
Object Type:
Video
System:
The UNT Digital Library
Proposed LLNL electron beam ion trap
The interaction of energetic electrons with highly charged ions is of great importance to several research fields such as astrophysics, laser fusion and magnetic fusion. In spite of this importance there are almost no measurements of electron interaction cross sections for ions more than a few times ionized. To address this problem an electron beam ion trap (EBIT) is being developed at LLNL. The device is essentially an EBIS except that it is not intended as a source of extracted ions. Instead the (variable energy) electron beam interacting with the confined ions will be used to obtain measurements of ionization cross sections, dielectronic recombination cross sections, radiative recombination cross sections, energy levels and oscillator strengths. Charge-exchange recombinaion cross sections with neutral gasses could also be measured. The goal is to produce and study elements in many different charge states up to He-like xenon and Ne-like uranium. 5 refs., 2 figs.
Date:
July 2, 1985
Creator:
Marrs, R.E.; Egan, P.O.; Proctor, I.; Levine, M.A.; Hansen, L.; Kajiyama, Y. et al.
Object Type:
Report
System:
The UNT Digital Library
The Mangum Star. (Mangum, Okla.), Vol. 21, No. 1, Ed. 1 Thursday, July 2, 1908
Weekly newspaper from Mangum, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1908
Creator:
Taylor, J. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Oklahoma State Register. (Guthrie, Okla.), Vol. 12, No. 27, Ed. 1 Thursday, July 2, 1903
Weekly newspaper from Guthrie, Oklahoma Territory that includes local, territorial, and national news along with advertising.
Date:
July 2, 1903
Creator:
Golobie, John
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Logan County News. (Crescent, Okla.), Vol. 12, No. 34, Ed. 1 Friday, July 2, 1915
Weekly newspaper from Crescent, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1915
Creator:
Frishman, Joseph
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat. (Altus, Okla.), Vol. 2, No. 15, Ed. 1 Thursday, July 2, 1908
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1908
Creator:
Williams, Bob & Ruthruff, C. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Mangum Star. (Mangum, Okla. Terr.), Vol. 15, No. 52, Ed. 1 Thursday, July 2, 1903
Weekly newspaper from Mangum, Oklahoma that includes local, territorial, and national news along with advertising.
Date:
July 2, 1903
Creator:
Echols, R. C. & Townsend, G. B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Oklahoma Democrat (Altus, Okla.), Vol. 7, No. 18, Ed. 1 Thursday, July 2, 1914
Weekly newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1914
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Foss Enterprise. (Foss, Okla.), Vol. 8, No. 34, Ed. 1 Friday, July 2, 1909
Weekly newspaper from Foss, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1909
Creator:
Huddlestun, Fred M.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guthrie Daily Star (Guthrie, Okla.), Vol. 9, No. 97, Ed. 1 Tuesday, July 2, 1912
Daily newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1912
Creator:
Hornaday, W. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Twice-A-Week Sun. (Guthrie, Okla.), Vol. 2, No. 44, Ed. 1 Wednesday, July 2, 1913
Semi-weekly newspaper from Guthrie, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1913
Creator:
Hubbard, J. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 24, No. 17, Ed. 1 Thursday, July 2, 1914
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1914
Creator:
Zimmerman, Warren
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Crowder City Guardian (Crowder, Oklahoma), Vol. 4, No. 35, Ed. 1 Friday, July 2, 1909
Weekly newspaper from Crowder, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1909
Creator:
Barrow, A. E.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Cushing Independent. (Cushing, Okla.), Vol. 7, No. 30, Ed. 1 Thursday, July 2, 1908
Weekly newspaper from Cushing, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1908
Creator:
Holland, Al. H.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Hooker Advance (Hooker, Okla.), Vol. 6, No. 21, Ed. 1 Friday, July 2, 1909
Weekly newspaper from Hooker, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1909
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Guymon Herald. (Guymon, Okla.), Vol. 18, No. 16, Ed. 1 Thursday, July 2, 1908
Weekly newspaper from Guymon, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1908
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Hobart Republican. (Hobart, Okla.), Vol. 6, No. 19, Ed. 1 Thursday, July 2, 1908
Weekly newspaper from Hobart, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1908
Creator:
Benedict, Roy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Navy Littoral Combat Ship (LCS) Program: Background and Issues for Congress
Report that provides background information and potential issues for Congress on the Littoral Combat Ship (LCS).
Date:
July 2, 2013
Creator:
O'Rourke, Ronald
Object Type:
Report
System:
The UNT Digital Library
Harmon County Tribune (Hollis, Okla.), Vol. 5, No. 45, Ed. 1 Friday, July 2, 1915
Weekly newspaper from Hollis, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 2, 1915
Creator:
Baldwin, A. A.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Cimarron News. (Boise City, Okla.), Vol. 16, No. 50, Ed. 1 Thursday, July 2, 1914
Weekly newspaper from Boise City, Oklahoma that includes local, state, and national news along with advertising. Established at Kenton, Oklahoma and moved to Boise City, March 24th, 1910.
Date:
July 2, 1914
Creator:
Thomas, Roscoe C.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History