1996 Fiscal Year Final Research Report Summary
Microscopic multicluster description of light nuclei with stochastic variational method
| Project/Area Number |
06640381
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
素粒子・核・宇宙線
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| Research Institution | Niigata University |
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Principal Investigator |
SUZUKI Yasuyuki Niigata University, Department of Physics, Professer, 理学部, 教授 (70018670)
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| Co-Investigator(Kenkyū-buntansha) |
YABANA Kazuhiro Niigata University, Graduate School of Science and Technology, Associate Profess, 自然科学研究科, 助教授 (70192789)
IKEDA Kiyomi Niigata University, Department of Physics, Professer, 理学部, 教授 (40011548)
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| Project Period (FY) |
1994 – 1996
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| Keywords | stochastic variation / unstable nuclei / halo structure / cluster model |
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| Research Abstract |
A Precise variational solution has so far been limited to 3-4 body system. This is mainly because an important configuration space becomes vast with increasing number of particles and accordingly because a setup of a good variational trial function becomes difficult. This problem has been thoroughly studied and resolved as follows :
(1) The correlated Gaussian basis is advantageous for describing correlation between particles and for evaluating matrix elements analytically.
(2) Nonlinear parameters of the variational function are determined in a trial and error process of the stochastic variational method we have developed.
With this development it has become possible to get a precise solution for nuclear fewbody problems.
The stochastic variational method has been applied to the study of light nuclei in a microscopic multicluster model. Some of the results obtained include
(1) the confirmation of halo structure in ^6Li, an analog of ^6IIe.
(2) the analysis of the properties of a mirror pair in A=7-9 nuclei, such as density distribution, magnetic and quadrupole moments.
(3) the determination of resonance parameters of ^9Be and ^9B.
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