The beta decay asymmetry parameter of /sup 35/Ar

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The beta decay asymmetry parameter for /sup 35/Ar = /sup 35/Cl + e/sup +/ + nu/sub e/ has been remeasured in order to resolve a long standing puzzle. Previous asymmetry measurements, when combined with the comparative half-life, yield a value for the vector coupling constant, G/sub v/, that is in serious disagreement with the accepted value. We produced polarized /sup 35/Ar by a (p,n) reaction on /sup 35/Cl using the polarized proton beam provided by Lawrence Berkeley Laboratory's 88-Inch Cyclotron. The polarization of the /sup 35/Ar was determined by measuring the asymmetry of the positrons produced in /sup 35/Ar decay ... continued below

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Pages: 85

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Garnett, J.D. November 1, 1987.

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Description

The beta decay asymmetry parameter for /sup 35/Ar = /sup 35/Cl + e/sup +/ + nu/sub e/ has been remeasured in order to resolve a long standing puzzle. Previous asymmetry measurements, when combined with the comparative half-life, yield a value for the vector coupling constant, G/sub v/, that is in serious disagreement with the accepted value. We produced polarized /sup 35/Ar by a (p,n) reaction on /sup 35/Cl using the polarized proton beam provided by Lawrence Berkeley Laboratory's 88-Inch Cyclotron. The polarization of the /sup 35/Ar was determined by measuring the asymmetry of the positrons produced in /sup 35/Ar decay to the first excited state in /sup 35/Cl (branching ratio = 1.3%) in coincidence with a 1219.4 keV gamma ray. Our result, A/sub 0/ = 0.49 +- 0.10, combined with the comparative half-life yields a value for G/sub v/ in agreement with the accepted value.

Physical Description

Pages: 85

Notes

NTIS, PC A05/MF A01; 1.

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  • Other Information: Thesis (Ph.D.). Portions of this document are illegible in microfiche products. Thesis

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  • Other: DE88003859
  • Report No.: LBL-24217
  • Grant Number: AC03-76SF00098
  • DOI: 10.2172/5582089 | External Link
  • Office of Scientific & Technical Information Report Number: 5582089
  • Archival Resource Key: ark:/67531/metadc1092625

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  • November 1, 1987

Added to The UNT Digital Library

  • Feb. 10, 2018, 10:06 p.m.

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  • April 24, 2018, 5:46 p.m.

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Garnett, J.D. The beta decay asymmetry parameter of /sup 35/Ar, report, November 1, 1987; [Berkeley,] California. (digital.library.unt.edu/ark:/67531/metadc1092625/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.