Observation of Enhanced Monopole Strength and Clustering in Be-12
- Yang, Z. H.
- Ye, Y. L.
- Li, Z. H.
- Lou, J. L.
- Wang, J. S.
- Jiang, D. X.
- Ge, Y. C.
- Li, Q. T.
- Hua, H.
- Li, X. Q.
- Xu, F. R.
- Pei, J. C.
- Qiao, R.
- You, H. B.
- Wang, H.
- Tian, Z. Y.
- Li, K. A.
- Sun, Y. L.
- Liu, H. N.
- Chen, J.
- Wu, J.
- Li, J.
- Jiang, W.
- Wen, C.
- Yang, B.
- Yang, Y. Y.
- Ma, P.
- Ma, J. B.
- Jin, S. L.
- Han, J. L.
- Lee, J.
DOIAbstract
In a recent breakup-reaction experiment using a Be-12 beam at 29 MeV/nucleon, the 0(+) band head of the expected He-4 + He-8 molecular rotation was clearly identified at about 10.3 MeV, from which a large monopole matrix element of 7.0 +/- 1.0 fm(2) and a large cluster-decay width were determined for the first time. These findings support the picture of strong clustering in Be-12, 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.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNE...
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