Elsevier

Nuclear Physics A

Volume 567, Issue 3, 24 January 1994, Pages 685-700
Nuclear Physics A

High-spin spectroscopy of the reflection-asymmetric nucleus 221Ac

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Abstract

The high-spin state structure of the nucleus 221Ac was investigated by means of the 209Bi(14C, 2n) reaction at 63 and 65 MeV. Measurements consisted of in-beam γγ coincidences using the Château de Cristal multidetector array and of eγ coincidences. Two alternating parity bands could be established in 221Ac up to spin 352h̷. Almost all of the states may be regrouped into parity doublets and the origin of these doublets is discussed.

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1

Now at CENBG, Gradignan, France.

3

Permanent address: Departamento de Fisica, Comision de Energia Atomica, Buenos Aires, Argentina.

4

Permanent address: Institute of Physics, Jagellonian University, Cracow, Poland.

2

Now at Siemens AG, München, Germany.

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