1999 Fiscal Year Final Research Report Summary
Study of single particle and collective states in nuclei near drip lines
| Project/Area Number |
09640369
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
素粒子・核・宇宙線
|
|---|
| Research Institution | UNIVERSITY OF AIZU |
|---|
Principal Investigator |
SAGAWA Hiroyuki University of Aizu School of Computer Science and Engineering, Professor, コンピュータ理工学部, 教授 (50178589)
|
|---|
| Project Period (FY) |
1997 – 1999
|
| Keywords | Drip Line Nuclei / Giant Resonances / Effectine Charges / Gamow Teller State / Isobaric Gnalogue States |
|---|
| Research Abstract |
In this project, the following terms have been studied intensively :
1) proton-neutron RPA response function and excited states in skin nuclei.
The existence of thick skin has been observed in He-isotopes and A=20 isobars. In these nuclei, one-body field is very different from those of stable nuclei. For example, the radial dependence of the one-body potential is different from that of Woods-Saxon potential and rather close to harmonic oscillator one. In this study, the response of drip line nuclei ^<24>O, ^<48>Ni and ^<60>Ca have been studied especially focusing on the threshold strength.
2) Pigmy resonances and Giant resonances in drip line nuclei We have studied dipole states of oxygen-isotopes in large scale shell model calculations. The calculated photoreaction cross sections in ^<16>O and ^<18>O give reasonable agreement with experimental observations both in the low energy region below hω=15 MeV and in the high energy giant resonance region (15 MeV<hω【less than or equal】30 MeV).
3) Isospin violation and restoration in thermal compound systems
Explicit relations between the isospin mixing probability, the spreading width Γ^↓_<IAS> of the Isobaric Analog State (IAS) and the statistical decay width Γ_c of the compound nucleus at finite excitation energy, are derived by using the Feshbach projection.
|
Research Products
(43 results)
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Publications] H.Orihara, C.C.Yun, A.Terakawa, K.Itoh, A.Yamamoto, K.Kawami, H.Suzuki, Y.Mizuno, H.Kamurai, Y.Tajima, K.Ishii, Y.Fujii, H.Sagawa, T.Suzuki and H.Ohnuma: "Isospin Mixing in the Isobaric Analog State Derived from the (p, n_<IAS>p^^-) Reaction on ^<140>Ce, ^<172,174,176>Yb and ^<208>Pb"Phys.Rev.Lett.. 81. 3607-3610 (1998)
Description
「研究成果報告書概要(欧文)」より
-
-
-
-
[Publications] T.Minamizono, Y.Nojiri, K.Matsuta, M.Fukuda, K.Sato, M.Tanigaki, A.Morishita, T.Miyake, Y.Matsumoto, T.Onishi, K.Ishiga, F.Ohsumi, H.Kitagawa and H.Sagawa: "Electromagnetic moments of the β-emitting nucleus ^<19>O"Phys.Lett.. B457. 9-16 (1999)
Description
「研究成果報告書概要(欧文)」より
-
-
-
-
