Low-energy electric dipole response in 120 Sn
Low-energy electric dipole response in 120 Sn
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DOI：
10.1016/j.physletb.2015.03.023
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发表时间：
2015-02
影响因子：
4.4
通讯作者：
A. Krumbholz;P. Neumann-Cosel;T. Hashimoto;A. Tamii;T. Adachi;C. Bertulani;H. Fujita;Y. Fujita;E. Ganioğlu;K. Hatanaka;C. Iwamoto;T. Kawabata;N. Khai;A. Krugmann;D. Martin;H. Matsubara;R. Neveling;H. Okamura;H. Ong;I. Poltoratska;V. Ponomarev;A. Richter;H. Sakaguchi;Y. Shimbara;Y. Shimizu;J. Simonis;F. Smit;G. Susoy;J. Thies;T. Suzuki;M. Yosoi;J. Zenihiro
中科院分区：
文献类型：
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作者：
A. Krumbholz;P. Neumann-Cosel;T. Hashimoto;A. Tamii;T. Adachi;C. Bertulani;H. Fujita;Y. Fujita;E. Ganioğlu;K. Hatanaka;C. Iwamoto;T. Kawabata;N. Khai;A. Krugmann;D. Martin;H. Matsubara;R. Neveling;H. Okamura;H. Ong;I. Poltoratska;V. Ponomarev;A. Richter;H. Sakaguchi;Y. Shimbara;Y. Shimizu;J. Simonis;F. Smit;G. Susoy;J. Thies;T. Suzuki;M. Yosoi;J. Zenihiro
从能量为295 MeV的质子非弹性散射实验中提取了120 Sn的电偶极强度分布。它不同于Sn 120（γ，γ′）实验的结果，峰值在8.3MeV激发能处。总强度相当于能量加权和规则的2.3（2）%，比（γ，γ′）反应所观察到的强度大三倍多。这意味着E1强度的强烈碎裂和/或激发1−态的小基态分支比。
The electric dipole strength distribution in 120 Sn has been extracted from proton inelastic scattering experiments at E p= 295 MeV and at forward angles including 0°. It differs from the results of a Sn 120 (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.