A new cluster model interpretation of the anomalous lifetime of C-14

作者：Robson D^*

来源：European Physical Journal A, 2011, 47(8): 95.

DOI：10.1140/epja/i2011-11095-2

A new cluster model solution to the long-standing nuclear structure problem of describing the anomalously long lifetime of C-14 is presented. Related beta-decay data for O-14 to states in N-14, gamma-decay data between low-lying positive parity states in N-14 and the elastic and inelastic magnetic dipole electron scattering from N-14 data are all shown to be very accurately described by the model. The shapes of the beta spectra for the A = 14 system are also well reproduced by the model. The model invokes four-nucleon tetrahedral symmetric spatial correlations arising from three- and four-nucleon interactions, which yields a high degree of SU(4) singlet structure for the clusters and a tetrahedral intrinsic shape for the doubly magic O-16 ground state. The large quadrupole moment of the N-14 ground state is obtained here for the first time and arises because of the almost 100% d-wave deuteron-like-hole cluster structure inherent in the model.

• 出版日期2011-8