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Title: Study of radionuclides created by /sup nat/Ni(. gamma. ,xn yp) reactions for bremsstrahlung photons produced by 140-MeV electrons

Technical Report ·
DOI:https://doi.org/10.2172/6139729· OSTI ID:6139729

Twelve radionuclides from /sup 48/V to /sup 57/Ni produced by photon interactions with a sample of elemental Ni have been studied to obtain relative yields of these reaction products. Precision half lives were determined for /sup 56/Ni and /sup 57/Ni. For /sup 56/Ni, T/sub 1/2/ = 6.08 +- 0.03 days, in agreement with previous measurements. For /sup 57/Ni, T/sub 1/2/ = 35.54 +- 0.05 h, in agreement with the 1982 measurement of Grutter but approx. 0.5 h shorter than earlier measurements. relative yields of the 127-keV, 1758-keV, and 1919-keV gamma rays following decay of /sup 57/Ni were determined with respect to the 1338-keV gamma ray of that decay and the results agree better with measurements of Grutter and of Gatrousis et al. than they do with the Lederer et al. evaluation.

Research Organization:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
DOE Contract Number:
AC05-84OR21400
OSTI ID:
6139729
Report Number(s):
ORNL/TM-9764; ON: DE86008480
Country of Publication:
United States
Language:
English

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