Elsevier

Nuclear Physics A

Volume 500, Issue 1, 14 August 1989, Pages 90-110
Nuclear Physics A

Alpha decay properties of light einsteinium isotopes

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Abstract

The light einsteinium isotopes, with mass numbers 249, 248, 247, 246, 245 and 243, were produced by irradiating 249Cf with protons, 238U with 14N, 237Np with 12C and 233U with 14N, and have been studied by means of α-ray spectroscopy. An analysis of the complex α-peaks of the einsteinium isotopes gave new α-branchings. The tentative assignments of 72+ → 72+, 92+) in the α-decay of 249Es, (72+ → 72+, 92+, 112+) in 247Es, (32− → 72+, 32−, 52−, 72−) in 245Es, and (32− → 72+, 32−) in 243Es were made.

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    Present address: Institute for Nuclear Study, University of Tokyo, Tanashi, Tokyo 188 Japan.

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