Elsevier

Nuclear Physics A

Volume 399, Issue 1, 9 May 1983, Pages 1-10
Nuclear Physics A

The 249Bk(p, t)247Bk reaction

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Abstract

The 249Bk(p, t)247Bk reaction was performed with a 15 MeV proton beam from the Princeton University AVF cyclotron. The outgoing tritons were magnetically analyzed by a QDDD spectrometer. A DWBA analysis was performed, and a good L = 0 angular distribution was observed populating the 72+[633] bandhead in 247Bk. Levels up to the 152 member of this rotational band were populated at 41, 84, 137, 196 and 265 keV. No other peaks were observed. The absence of strength in the 52+[642] band is shown to be consistent with the degree of mixing expected from calculation of the Coriolis interaction. The ground state of 249Bk is discussed in terms of the gap in the neutron Nilsson levels at N = 152.

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    On leave from Institut Max von Laue-Paul Langevin, F38 Grenoble, France.

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