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Determination of the beta energy (E/sub max/) using thin window instruments
The use of simple survey instruments for beta-energy analysis is complicated by large differences that exist in the beta spectra shapes. These spectral shapes are often complex and change continuously as the betas are absorbed in air. Changes are also caused by absorbing material between the source and the detector. One may frequently encounter a combination of beta energies, either from multiple emissions from a single isotope or from several isotopes in the sample being evaluated. There may also be monoenergetic conversion electrons present in the sample or low-energy X rays which are absorbed in a similar fashion to betas. Obviously, a complete analysis of compelx beta spectra cannot be performed using only survey instruments. We present two methods which will give the approximate E/sub max/ of the beta energy responsible for the most significant portion of the beta dose. Either technique should give adequate information about the beta spectra to provide necessary guidance for the health physics evaluation of the exposure.
Date:
August 12, 1983
Creator:
Hankins, D.E.
Object Type:
Article
System:
The UNT Digital Library
Recent results from the PEP4-TPC on quark fragmentation
The physics goals for the PEP-4/PEP-9 experiment concentrate on two areas: the fragmentation properties of quarks and gluons produced in e+e- annihilation, and the investigation of hadron production in 2-photon collisions. Only the first of these topics is addressed. Despite the many successes of QCD in the description of deep inelastic reactions, the basic fragmentation process of quarks and gluons is not very well understood. This lack of knowledge has been shown to jeopardize precise test of QCD, such as the accurate determination of the strong coupling constant. With its ability to disentangle complex hadronic events and to identify most of the final state particles, the TPC allows new and more sensitive tests of fragmentation models. A brief description of the detector is given and particle identification by ionization energy loss is described. Next, the inclusive production of stable hadrons and of resonances is discussed, and limits on the inclusive production of fractional charged particles are given. A new analysis of long-range correlations in e+e- annihilation is given.
Date:
November 12, 1983
Creator:
Hofmann, W.
Object Type:
Article
System:
The UNT Digital Library
Large aperture optical switching devices
We have developed a new approach to constructing large aperture optical switches for next generation inertial confinement fusion lasers. A transparent plasma electrode formed in low pressure ionized gas acts as a conductive coating to allow the uniform charging of the optical faces of an electro-optic material. In this manner large electric fields can be applied longitudinally to large aperture, high aspect ratio Pockels cells. We propose a four-electrode geometry to create the necessary high conductivity plasma sheets, and have demonstrated fast (less than 10 nsec) switching in a 5x5 cm aperture KD*P Pockels cell with such a design. Detaid modelling of Pockels cell performance with plasma electrodes has been carried out for 15 and 30 cm aperture designs.
Date:
December 12, 1983
Creator:
Goldhar, J. & Henesian, M.A.
Object Type:
Article
System:
The UNT Digital Library
[Photograph 2012.201.B0142.0283]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
December 12, 1983
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0162.0608]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Heather Dinstbir , left, and Deborah Ogle are chairmen .."
Date:
November 12, 1983
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0166.0505]
Photograph used for a story in the Daily Oklahoman newspaper.
Date:
October 12, 1983
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0161.0156]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Students at Dewey Fifth Year Center return to class after a fire drill Wednesday."
Date:
October 12, 1983
Creator:
Howell, Paul S.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0161.0236]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Joe Dial / OSU pole vaulter."
Date:
February 12, 1983
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0134.0420]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Lisa Christoph practices against her new BNC teammates .."
Date:
September 12, 1983
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0043]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Stan Constant . . . Possesses a drive to excel"
Date:
May 12, 1983
Creator:
Lynn, Renee
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0152.0211]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Fishing below Ft. Gibson Lake spillway & dam open releasing water"
Date:
April 12, 1983
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0581]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 12, 1983
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0135.0605]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "It was a Spring Fling!"
Date:
March 12, 1983
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0147.0091]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Dr. and Mrs. Gregory Cox admire the main centerpiece at the buffet table."
Date:
February 12, 1983
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0142.0349]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Mrs. Mike (Cathy) Cross, Mrs. Greg (Janie) Cook and Mrs. Zane (Ann) Fleming look at the unusual centerpiece at a recent luncheon held by Mrs. Fleming to announcing the pending birth of the Cooks' fourth child."
Date:
January 12, 1983
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0138.0061]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
April 12, 1983
Creator:
Klock, Roger
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0583]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 12, 1983
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0136.0140]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Principal Sue Clark cuts the cake for retiring teachers Ona Mae Van Vliet, center, and Virginia Beene."
Date:
May 12, 1983
Creator:
Beckel, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0141.0389]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Don't play with matches--That will-known admonishment about children and fire is not the point of this demonstration by Mrs. William Conover. The naturalist is showing Jason Easley, 7, the old-fashioned way of making fire without matches. ."
Date:
February 12, 1983
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0144.0184]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "OCU sophomore Kimberly Cornell of Dallas was crowned Miss OCU Saturday night at Kirkpatrick Auditorium."
Date:
February 12, 1983
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0137.0582]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 12, 1983
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0322.0007]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Mardi Cornman, left, passes sample sandwiches to Mrs. Charles B. McFarland, second from left, hostess, Mrs. Kenny Kaaiohelo, and Mrs. Louis W. Patterson, right, at a recent meeting of Freedom Foundation at Valley Forge."
Date:
May 12, 1983
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0325.0145]
Photograph used for a story in the Oklahoma Times newspaper. Caption: "Ken Kellett checks joints on his reproduction of Wright brothers' plane."
Date:
October 12, 1983
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Vacuum measurements on the Tandem Mirror Experiment Upgrade (TMX-U) fusion experiment
The gas inventory of the Tandem Mirror Experiment Upgrade (TMX-U) must be carefully controlled, if it is to successfully create various plasma configurations for thermal-barrier experiments designed to provide an improved performance for tandem-mirror experiments. This paper is a progress report on the calibration methods and pressure measurements of machine conditions deriving from recently improved neutral-beam gas control, and changes to the internal baffling geometry and the gettering system.
Date:
August 12, 1983
Creator:
Calderon, M. O.; Hunt, A. L.; Lang, D. D.; Nexsen, W. E.; Pickles, W. L. & Turner, W. C.
Object Type:
Article
System:
The UNT Digital Library