학술논문
Low-energy electric dipole response in 120Sn
Document Type
article
Author
A.M. Krumbholz; P. von Neumann-Cosel; T. Hashimoto; A. Tamii; T. Adachi; C.A. Bertulani; H. Fujita; Y. Fujita; E. Ganioglu; K. Hatanaka; C. Iwamoto; T. Kawabata; N.T. Khai; A. Krugmann; D. Martin; H. Matsubara; R. Neveling; H. Okamura; H.J. Ong; I. Poltoratska; V.Yu. Ponomarev; A. Richter; H. Sakaguchi; Y. Shimbara; Y. Shimizu; J. Simonis; F.D. Smit; G. Susoy; J.H. Thies; T. Suzuki; M. Yosoi; J. Zenihiro
Source
Physics Letters B, Vol 744, Iss , Pp 7-12 (2015)
Subject
Language
English
ISSN
0370-2693
Abstract
The electric dipole strength distribution in 120Sn has been extracted from proton inelastic scattering experiments at Ep=295 MeV and at forward angles including 0°. It differs from the results of a Sn120(γ,γ′) experiment and peaks at an excitation energy of 8.3 MeV. The total strength corresponds to 2.3(2)% of the energy-weighted sum rule and is more than three times larger than what is observed with the (γ,γ′) reaction. This implies a strong fragmentation of the E1 strength and/or small ground state branching ratios of the excited 1− states. Keywords: Sn120(p,p′), Ep=295 MeV, Relativistic Coulomb excitation, E1 strength below neutron threshold