Unresolved dipole strength in spectra of the 157Gd(γ,γ′) reaction

被引：23

作者：

Enders, J ^{[1
]}

Huxel, N

Kneissl, U

von Neumann-Cosel, P

Pitz, HH

Richter, A

机构：

[1] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[2] Univ Stuttgart, Inst Strahlenphys, D-70569 Stuttgart, Germany

来源：

PHYSICAL REVIEW C | 1998年 / 57卷 / 02期

关键词：

D O I：

10.1103/PhysRevC.57.996

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：

A recently proposed fluctuation analysis of resonant photon scattering spectra [J. Enders et al., Phys. Rev. Lea. 79, 2010 (1997)] is applied to the Gd-157(gamma,gamma') reaction. Evidence for unresolved strength in the experi mental background is found which amounts to a total dipole excitation strength of Sigma g Gamma(0)(red) = (30(-10)(+6)) meV/MeV3 in the excitation energy range 2.5-4 MeV. Assuming a smooth variation of the M1/E1 strength ratio in the neighboring even-mass nuclei, the M1 part can be estimated to be B(M1) = (2.0(-0.7)(+0.4)) mu(N)(2). This value is close to the expectation of sum rules. We discuss possible sources of errors which suggests that the obtained value represents a lower limit only.

引用

页码：996 / 999

页数：4

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