Isoscalar giant dipole resonance in 90Zr, 116Sn, and 208Pb -: art. no. 031301

被引：92

作者：

Clark, HL ^{[1
]}

Lui, YW ^{[1
]}

Youngblood, DH ^{[1
]}

机构：

[1] Texas A&M Univ, Inst Cyclotron, College Stn, TX 77845 USA

来源：

PHYSICAL REVIEW C | 2001年 / 63卷 / 03期

关键词：

D O I：

10.1103/PhysRevC.63.031301

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：

Strength functions for isoscalar dipole excitations in Zr-90, Sn-116, and Pb-208 have been measured with inelastic scattering of 240 MeV alpha particles at small angles. The isoscalar E1 strength distribution in each nucleus is found to consist of a broad component at E-x similar to 114/A(1/3) MeV containing approximately 100% of the E1 EWSR and a narrower one at E-x similar to 72/A(1/3) MeV containing 15-28% of the total isoscalar E1 strength. The higher component is the compression mode E1 strength previously reported only in Pb-208, whereas the lower component may be a new mode not reported previously, but suggested by recent RPA-HF and relativistic mean field calculations.

引用

页码：313011 / 313015

页数：5

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