Gamow-Teller strength in the continuum and quenching problem

被引：0

作者：

Sakai, H. ^{[1
]}

Wakasa, T. ^{[1
]}

Okamura, H. ^{[1
]}

Otsu, H. ^{[1
]}

Uesaka, T. ^{[1
]}

Sakamoto, N. ^{[1
]}

Satou, Y. ^{[1
]}

Hatanaka, K. ^{[2
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

[2] Osaka Univ, Res Ctr Nucl Phys, Ibaraki, Osaka 5670047, Japan

来源：

NUCLEAR PHYSICS A | 1999年 / 654卷 / 01期

关键词：

D O I：

10.1016/S0375-9474(00)88537-1

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：

Differential cross sections at theta(lab) = 0.0 degrees - 12.3 degrees and a complete set of polarization transfer observables at theta(lab) = 0.0 degrees are measured for the Zr-90(p, n) reaction at T-p = 295 MeV. A multipole decomposition analysis (MDA) technique is applied to the cross sections to deduce the Gamow-Teller (GT) strength B(GT). The obtained S-beta- = Sigma B(GT) value is 28.0 +/- 1.6. The total spin transfer E is obtained for the continuum by using polarization transfer measurements. The S beta(-) - S beta+ value is deduced to be 27.0 and this is 90% of Ikeda's sum rule value of 3(N - Z)=30. Thus the quenching of the GT strength is small and the quenching mechanism due to the Delta N- admixture seems to play a minor role.

引用

页码：731C / 734C

页数：4

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