Freer M, Casarejos E, Achouri L, Angulo C, Ashwood NI, Curtis N, Demaret P, Harlin C, Laurent B, Milin M, Orr NA, Price D, Raabe R, Soić N, Ziman VA. Alpha:2n:alpha molecular band in 10Be.
PHYSICAL REVIEW LETTERS 2006;
96:042501. [PMID:
16486811 DOI:
10.1103/physrevlett.96.042501]
[Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2005] [Indexed: 05/06/2023]
Abstract
The 10.15 MeV resonance in 10Be has been probed via resonant 6He+4He elastic scattering. It is demonstrated that it is the Jpi=4+ member of a rotational band built on the 6.18 MeV 0+ state. A Gammaalpha of 0.10-0.13 MeV and Gammaalpha/Gamma=0.35-0.46 were deduced. The corresponding reduced alpha width, gamma2alpha, indicates one of the largest alpha-cluster spectroscopic factors known. The deformation of the band, including the 7.54 MeV, 2+ member, is large (h2/2I=200 keV). Such a deformation and the significant degree of clusterization signals a well-developed alpha:2n:alpha molecular structure.
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