Low Energy Nuclear Physics : Second Annual Report for the Period February 1, 1959 to January 31, 1960

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The general expression for the angular correlation between radiations produced in successive cascade transitions is derived by use of Racah algebra. The result is then specialized to the beta - gamma correlation and applied to two cases in which additional properties of the photon are specified, the circular polarization and the plane polarization. The prospect of testing time reversal and determining nuclear matrix element ratios by beta - gamma correlation measurements is explored using the nuclide Tm/sup 170/ as an example. The directional angular correlation between the 2.31-Mev beta and the subsequent 0.605-Mev gamma emitted in the decay of Sb/sup … continued below

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125 pages : illustrations

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Jastram, Philip S. (Philip Sheldon), 1920-1992 January 23, 1960.

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  • Main Title: Low Energy Nuclear Physics : Second Annual Report for the Period February 1, 1959 to January 31, 1960
  • Series Title: AECU (Series)
  • Series Title: Atomic Energy Commission Reports
  • Added Title: Atomic Energy Commission Report AECU-4676

Description

The general expression for the angular correlation between radiations produced in successive cascade transitions is derived by use of Racah algebra. The result is then specialized to the beta - gamma correlation and applied to two cases in which additional properties of the photon are specified, the circular polarization and the plane polarization. The prospect of testing time reversal and determining nuclear matrix element ratios by beta - gamma correlation measurements is explored using the nuclide Tm/sup 170/ as an example. The directional angular correlation between the 2.31-Mev beta and the subsequent 0.605-Mev gamma emitted in the decay of Sb/sup 124/ was measured as a function of the beta energy. The K-conversion coefficient of the 279-kev gamma following beta decay of Hg/sup 203/ was measured by comparing the x-ray and gamma intensities in a scintillation spectrometer. The measured valve of alpha /sub k/ = 0.195 plus or minus 0.014 indicates that the transition is M1 with E2 mixed to the extent of 63%. The angular correlation of the 107-1.24 Mev gamma cascade in Zn/sup 68/ following the decay of 68-min Ga/sup 68/ is shown. The Legendre polynomial expansion coefficients were deter-gular correlation in the decay of Sb/ sup 118/ was studied between the 1.03-1.22 Mev gammas and between the 0.260-1.22 Mev gammas in an attempt to deduce the spins of the corresponding levels of Sn/ sup 118/. Apparatus: A linear amplifier employing triode pairs connected in cascade and R-C clipping was designed for applications to scintillation and proportional counter gamma and x-ray spectroscopy in the kilovolt region. The circuit design and performance are described. A wideband distributed amplifier which uses twelve 6688/E180F pentodes is described. Design, construction, and performance details are discussed. A thin lens beta spectrometer designed particularly for beta - gamma coincidence spectroscopy and angular correlation measurements was constructed.

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125 pages : illustrations

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Digitized from microopaque cards (4).

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  • Report No.: AECU-4676
  • SuDoc Number: Y 3.At 7:22/AECU-4676
  • Grant Number: AT(11-1)-605
  • Accession or Local Control No: metadc1248795
  • Archival Resource Key: ark:/67531/metadc1248795

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  • January 23, 1960

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  • July 9, 2023, 6:09 p.m.

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  • March 27, 2024, 12:13 p.m.

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Jastram, Philip S. (Philip Sheldon), 1920-1992. Low Energy Nuclear Physics : Second Annual Report for the Period February 1, 1959 to January 31, 1960, report, January 23, 1960; Columbus, Ohio. (https://digital.library.unt.edu/ark:/67531/metadc1248795/: accessed September 16, 2026), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.

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