Determination of the {sup 51}Cr source strength at BNL

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Neutron activation analysis (NAA) and {gamma}-ray counting have been used to measure the activity of 24 samples removed from the GALLEX radioactive Cr neutrino source. In 9.86% of the disintegrations, {sup 51}Cr decays with the emission of a 320-keV {gamma}-ray. Counting this {gamma}-ray provides a direct means to obtain the disintegration rates of the Cr samples. Based upon these disintegration rates, the authors obtain a strength of 63.1 {+-} 1.0 PBq for the entire Cr source. The Cr source activity has also been obtained through measuring the {sup 51}V content of each sample by means of NAA. {sup 51}V is ... continued below

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25 p.

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Boger, J.; Hahn, R.L. & Chu, Y.Y. November 1, 1995.

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Description

Neutron activation analysis (NAA) and {gamma}-ray counting have been used to measure the activity of 24 samples removed from the GALLEX radioactive Cr neutrino source. In 9.86% of the disintegrations, {sup 51}Cr decays with the emission of a 320-keV {gamma}-ray. Counting this {gamma}-ray provides a direct means to obtain the disintegration rates of the Cr samples. Based upon these disintegration rates, the authors obtain a strength of 63.1 {+-} 1.0 PBq for the entire Cr source. The Cr source activity has also been obtained through measuring the {sup 51}V content of each sample by means of NAA. {sup 51}V is the decay daughter for all decay modes of {sup 51}Cr. Through neutron bombardment, radioactive {sup 52}V is produced, which decays with the emission of a 1,434-keV {gamma}-ray. By counting this {gamma}-ray from NAA, they obtain a disintegration rate of 62.1 {+-} 1.0 PBq for the entire source. These values are consistent with all other measurements of the source strength done at other GALLEX Laboratories.

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25 p.

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INIS; OSTI as DE96003724

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  • Other Information: PBD: Nov 1995

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  • Other: DE96003724
  • Report No.: BNL--62491
  • Grant Number: AC02-76CH00016
  • DOI: 10.2172/188617 | External Link
  • Office of Scientific & Technical Information Report Number: 188617
  • Archival Resource Key: ark:/67531/metadc671799

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  • November 1, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Nov. 30, 2015, 7:18 p.m.

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Boger, J.; Hahn, R.L. & Chu, Y.Y. Determination of the {sup 51}Cr source strength at BNL, report, November 1, 1995; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc671799/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.