Elsevier

Nuclear Physics A

Volume 103, Issue 2, 30 October 1967, Pages 417-426
Nuclear Physics A

The new radioisotope 99Ag and some measurements on 100Ag

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Abstract

Production of 99Ag with a (p, 4n) reaction on 102Pd targets has been observed. A half-life of 106±10 sec has been measured for gamma transition at 660(30), 750(15), 1040(100), 1525 (30), 1700(90) and 3315(35) keV. The growth and decay of the daughter 99Pd has been observed. A positon spectrum was resolved into three branches at 3.32(59.2), 2.43(23.9) and 1.69(16.9) MeV. A level scheme has been proposed for the levels in 99Pd.

A high-energy positon branch at 6.5±0.5 MeV with a 7.5±1 min half-life was observed and has been ascribed to 100Ag. The threshold for this production indicates a (p, 3n) reaction. In addition, two intense gamma transitions at 556 and 728 keV with the same half-life are ascribed to the decay of 100Ag.

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Work supported in part by the Office of Naval Research Contract NONR-233(44).

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