Observation of Enhanced Monopole Strength and Clustering in Be12

Z. H. Yang ((杨再宏)) et al.
Phys. Rev. Lett. 112, 162501 – Published 22 April 2014

Abstract

In a recent breakup-reaction experiment using a Be12 beam at 29MeV/nucleon, the 0+ band head of the expected He4+He8 molecular rotation was clearly identified at about 10.3 MeV, from which a large monopole matrix element of 7.0±1.0fm2 and a large cluster-decay width were determined for the first time. These findings support the picture of strong clustering in Be12, which has been a subject of intense investigations over the past decade. The results were obtained thanks to a specially arranged detection system around zero degrees, which is essential in determining the newly emphasized monopole strengths to signal the cluster formation in a nucleus.

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  • Received 10 December 2013

DOI:https://doi.org/10.1103/PhysRevLett.112.162501

© 2014 American Physical Society

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Vol. 112, Iss. 16 — 25 April 2014

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