Determination of the {sup 51}Cr source strength at BNL
- Brookhaven National Lab., Upton, NY (United States). Chemistry Dept.
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.
- Research Organization:
- Brookhaven National Lab., Upton, NY (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 188617
- Report Number(s):
- BNL--62491; ON: DE96003724
- Country of Publication:
- United States
- Language:
- English
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