Elsevier

Physics Letters B

Volume 163, Issues 5–6, 28 November 1985, Pages 327-330
Physics Letters B

A g-factor measurement of the 239Am fission isomer

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Abstract

The g-factor of the t12=163(16) ns fission isomer in 239Am has been measured using the time-differential perturbed angular distribution method. The values obtained are: g=(+)0.74(5), and anisotropy parameter, A2=(−)0.20(7), where the signs have been obtained from systematics. To explain the g-factor one requires a Nilsson orbital with Λ⩾4 and anti-parallel coupling of Σ and Λ. The [404]72 level which is near the Fermi level in some calculations is a possible candidate. The anisotropy is consistent with ω=72 at the second saddle point.

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Supported in part by the National Science Foundation.

1

Present address: Weizmann Institute, Rehovot, Israel.

2

Present address: EMR Corporation, Princeton, NJ, USA.

3

Present address: Konstanz University, Constance, Germany.

4

Present address: Atomic Energy Institute, Beijing, China.

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