2012 Fiscal Year Final Research Report
Coexistence phenomena of chemical-bonding-like structures in neutron excess systems
| Project/Area Number |
21740211
|
|---|
| Research Category |
Grant-in-Aid for Young Scientists (B)
|
| Allocation Type | Single-year Grants |
|---|
| Research Field |
Particle/Nuclear/Cosmic ray/Astro physics
|
|---|
| Research Institution | Kansai University |
|---|
Principal Investigator |
ITO Makoto 関西大学, システム理工学部, 准教授 (30396600)
|
|---|
| Project Period (FY) |
2009 – 2012
|
| Keywords | 中性子過剰核 / クラスター構造 / 化学結合 / 共鳴反応 / チャンネル結合計算 |
|---|
| Research Abstract |
The generalized two-center cluster model (GTCM), which can treat covalent and atomic configurations in general two center systems, is applied to the light neutron-excess system, 12Be = . + . + 4N. The intrinsic structure of the excited energy levels is investigated. We found that, in an unbound region, the ionic structures of .+8He and 5He+7He, the atomic structure of 6He+6He are generated although the covalent structures are dominant in the bound region. An exotic superdeformation, which has a hybrid configuration of both the covalent and He-dimer structures, is also realized in the same energy region. The level scheme of these unbound states reveals a strong degenerate feature with a considerable mixture of the different configurations. The present result strongly suggests that such a degenerate feature can be generalized to general neutron-excess systems in the lighter mass region.
|
