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Characteristic alpha and He-6 decays of linear-chain structures in C-16

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Title: Characteristic alpha and He-6 decays of linear-chain structures in C-16
Authors: Baba, Tomoyuki Browse this author
Kimura, Masaaki Browse this author →KAKEN DB
Keywords: Alpha decay
Heavy-particle decays
Nuclear structure & decays
Nuclear physics
Issue Date: 14-May-2018
Publisher: American Physical Society (APS)
Journal Title: Physical Review C
Volume: 97
Issue: 5
Start Page: 054315
Publisher DOI: 10.1103/PhysRevC.97.054315
Abstract: The linear-chain states of C-16 and their decay modes are theoretically investigated by using the antisymmetrized molecular dynamics. It is found that the positive-parity linear-chain states have the (3/2(pi)(-)) 2(1/2(sigma)(-))(2) configuration and primary decay to Be-12(2(1)(+)) as well as to Be-12(g.s.) by alpha-particle emission. Moreover, we show that they also decay via the He-6 + Be-10 channel. In the negative-parity states, it is found that two types of linear chains exist. One has the valence neutrons occupying the molecular orbits (3/2(pi)(-))(2)(1/2(sigma)(-))(3/2(pi)(+)), while the other's configuration cannot be explained in terms of the molecular orbits because of the strong parity mixing. Both configurations constitute the rotational bands with a large moment of inertia and intraband E2 transitions. Their alpha and He-6 reduced widths are sufficiently large to be distinguished from other noncluster states although they are smaller than those of the positive-parity linear chain.
Rights: ©2018 American Physical Society
Type: article
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 木村 真明

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