experimental investigation of a linear-chain structure in the nucleus 14c
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ID: 252468
2017
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Abstract
It is a well-known fact that a cluster of nucleons can be formed in the interior of an atomic nucleus, and such clusters may occupy molecular-like orbitals, showing characteristics similar to normal molecules consisting of atoms. Chemical molecules having a linear alignment are commonly seen in nature, such as carbon dioxide. A similar linear alignment of the nuclear clusters, referred to as linear-chain cluster state (LCCS), has been studied since the 1950s, however, up to now there is no clear experimental evidence demonstrating the existence of such a state. Recently, it was proposed that an excess of neutrons may offer just such a stabilizing mechanism, revitalizing interest in the nuclear LCCS, specifically with predictions for their emergence in neutron-rich carbon isotopes. Here we present the experimental observation of α-cluster states in the radioactive 14C nucleus. Using the Be10+α resonant scattering method with a radioactive beam, we observed a series of levels which completely agree with theoretically predicted levels having an explicit linear-chain cluster configuration. We regard this as the first strong indication of the linear-chain clustered nucleus.
| Reference Key |
yamaguchi2017physicsexperimental
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| Authors | ;H. Yamaguchi;D. Kahl;S. Hayakawa;Y. Sakaguchi;K. Abe;T. Nakao;T. Suhara;N. Iwasa;A. Kim;D.H. Kim;S.M. Cha;M.S. Kwag;J.H. Lee;E.J. Lee;K.Y. Chae;Y. Wakabayashi;N. Imai;N. Kitamura;P. Lee;J.Y. Moon;K.B. Lee;C. Akers;H.S. Jung;N.N. Duy;L.H. Khiem;C.S. Lee |
| Journal | ACS chemical biology |
| Year | 2017 |
| DOI |
10.1016/j.physletb.2016.12.050
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