Evidence for a Doubly Magic O-24

Document Type

Article

Publication Date

2-9-2009

Publication Source

Physics Letters B

Volume Number

672

Issue Number

1

First Page

17

Last Page

21

Publisher

Elsevier Science BV

ISSN

0370-2693

Abstract

The decay energy spectrum for neutron unbound states in O-24 (Z = 8, N = 16) has been observed for the first time. The resonance energy of the lowest lying state, interpreted as the 2(+) level, has been observed at a decay energy above 600 keV. The resulting excitation energy of the 2(+) level above 4.7 MeV. supplies strong evidence that O-24 is a doubly magic nucleus. The data is also consistent with the presence of a second excited state around 5.33 MeV which can be interpreted as the 1(+) level.

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