Isospin and spin-orbital structures of J(pi)=1(+) states excited in Si-28

被引：36

作者：

Fujita, Y

Akimune, H

Daito, I

Fujiwara, M

Harakeh, MN

Inomata, T

Janecke, J

Katori, K

Luttge, C

Nakayama, S

vonNeumannCosel, P

Richter, A

Tamii, A

Tanaka, M

Toyokawa, H

Ueno, H

Yosoi, M

机构：

[1] OSAKA UNIV, NUCL PHYS RES CTR, IBARAKI, OSAKA 567, JAPAN

[2] KERNFYS VERSNELLER INST, NL-9747 AA GRONINGEN, NETHERLANDS

[3] UNIV MICHIGAN, DEPT PHYS, ANN ARBOR, MI 48109 USA

[4] TH DARMSTADT, INST KERNPHYS, D-64289 DARMSTADT, GERMANY

[5] UNIV TOKUSHIMA, DEPT PHYS, TOKUSHIMA 770, JAPAN

[6] KYOTO UNIV, DEPT PHYS, SAKYO KU, KYOTO 606, JAPAN

[7] KOBE TOKIWA JR COLL, KOBE, HYOGO 653, JAPAN

来源：

PHYSICAL REVIEW C | 1997年 / 55卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.55.1137

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Gamow-Teller (GT) states with J(pi) = 1(+) excited by a (p,n)-type charge-exchange reaction on N=Z nuclei with ground-state isospin T = 0 have isospin T = 1, while M1 states excited by inelastic scattering of electrons or protons can have either T = 0 or T = 1. The latter are the isobaric analog states of the GT states. By comparing the GT states observed in the good-resolution (He-3,t) reaction at 150 MeV/nucleon with the M1 states observed in inelastic electron and proton reactions, the isospin structure of the 1(+) states in Si-28 has been determined. From an analysis of the strengths of corresponding 1(+) states observed in the (He-3,t) and (e,e') reactions, the spin and orbital contributions to the M1 excitations have been deduced.

引用

页码：1137 / 1145

页数：9

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