|
Hokkaido University Collection of Scholarly and Academic Papers >
Theses >
博士 （理学） >
Linear-Chain Structure in Carbon Isotopes
|
Files in This Item:
|
|
|
Related Items in HUSCAP:
|
| Title: | Linear-Chain Structure in Carbon Isotopes |
| Other Titles: | 炭素同位体における直鎖クラスター構造 |
| Authors: | 馬場, 智之 Browse this author |
| Issue Date: | 25-Mar-2019 |
| Publisher: | Hokkaido University |
| Abstract: | To establish the existence of the linear-chain structure, we theoretically investigate excited states in 14C and 16C by using the antisymmetrized molecular dynamics. For 14C, it is found that two types of linear-chain formation, π-bond and σ-bond linear chains, appear in positive-parity states. The calculated excitation energies, moments of inertia, and α-decay widths of the linear-chain states are compared with the observed data reported by recent experiments. The properties of the π-bond linear-chain states reasonably agree with the observation, which convinces us of the linear-chain formation in 14C. In addition, we suggest characteristic decay patterns and Coulomb shifts as the way to distinguish the π-bond and σ-bond linear chains. As a result, the σ-bond linear chain is a good candidate for the higher-lying resonant states reported by a cluster-transfer experiment. For 16C, it is found that the positive-parity linear-chain states have the (3/2π−)2(1/2−σ )2 configuration and primary decay to 12Be(2+1 ) as well as to 12Be(g.s.) by α-particle emission. Moreover, we show that they also decay via the 6He + 10Be channel. In the negative-parity states, it is found that two types of the linear chains exist. One has the valence neutrons occupying the molecular orbits (3/2−π )2(1/2−σ )(3/2+π ), while another configuration cannot be explained in terms of the molecular orbits because of the strong parity mixing. Their α and 6He reduced widths are sufficiently large to be distinguished from other non-cluster states although they are smaller than those of the positiveparity linear chain. |
| Conffering University: | 北海道大学 |
| Degree Report Number: | 甲第13565号 |
| Degree Level: | 博士 |
| Degree Discipline: | 理学 |
| Examination Committee Members: | (主査) 准教授 木村 真明, 教授 小林 達夫, 教授 鈴木 久男, 講師 堀内 渉 |
| Degree Affiliation: | 理学院（宇宙理学専攻） |
| Type: | theses (doctoral) |
| URI: | http://hdl.handle.net/2115/74297 |
| Appears in Collections: | 課程博士 (Doctorate by way of Advanced Course) > 理学院(Graduate School of Science)
学位論文 (Theses) > 博士 （理学）
|
|
