ISOVECTOR-E2 RESONANCE IN PB-208

被引：27

作者：

DALE, DS

LASZEWSKI, RM

ALARCON, R

机构：

[1] UNIV ILLINOIS,NUCL PHYS LAB,CHAMPAIGN,IL 61820

[2] UNIV ILLINOIS,DEPT PHYS,CHAMPAIGN,IL 61820

[3] ARIZONA STATE UNIV,DEPT PHYS & ASTRON,TEMPE,AZ 85287

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.68.3507

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Polarization asymmetries observed in elastic tagged photon scattering at excitations between 16 and 30 MeV were used to identify the isovector giant electric quadrupole resonance in Pb-208 through its interference with underlying electric dipole strength. Resonance parameters reflecting the distribution of the E2 (T = 1) transition strength were extracted in a manner that has minimal sensitivity to uncertainties in the Delbruck amplitudes or in the q dependence of the modified Thomson amplitudes. The isovector E2 resonance was found at an excitation of 20.2 +/- 0.5 MeV, with a width of 5.5 +/- 0.5 MeV, and a strength corresponding to 1.4 +/- 0.3 times the isovector quadrupole sum rule.

引用

页码：3507 / 3510

页数：4

共 43 条

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