Physics Letters B (May 2015)
Low-energy electric dipole response in 120Sn
- 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
Affiliations
- A.M. Krumbholz
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany
- P. von Neumann-Cosel
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany; Corresponding author.
- T. Hashimoto
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan; Rare Isotope Project, Institute for Basic Science, 70 Yuseong-daero, 1689-gil, Yuseong-gu, Daejeon, Republic of Korea
- A. Tamii
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- T. Adachi
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- C.A. Bertulani
- Department of Physics, Texas A&M University-Commerce, Commerce, TX 75429, USA
- H. Fujita
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- Y. Fujita
- Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
- E. Ganioglu
- Physics Department, Faculty of Science, Istanbul University, 34459 Vezneciler, Istanbul, Turkey
- K. Hatanaka
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- C. Iwamoto
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- T. Kawabata
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- N.T. Khai
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan; Institute for Nuclear Science and Technology, 179 Hoang Quoc Viet, Hanoi, Viet Nam
- A. Krugmann
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany
- D. Martin
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany
- H. Matsubara
- National Institute of Radiological Sciences, Chiba 263-8555, Japan
- R. Neveling
- iThemba LABS, PO Box 722, Somerset West 7129, South Africa
- H. Okamura
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- H.J. Ong
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- I. Poltoratska
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany
- V.Yu. Ponomarev
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany
- A. Richter
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany
- H. Sakaguchi
- Department of Physics, Miyazaki University, Miyazaki 889-2192, Japan
- Y. Shimbara
- Cyclotron and Radioisotope Center, Tohoku University, Sendai 980-8578, Japan
- Y. Shimizu
- RIKEN, Nishina Center, Wako, Saitama 351-0198, Japan
- J. Simonis
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289, Darmstadt, Germany
- F.D. Smit
- iThemba LABS, PO Box 722, Somerset West 7129, South Africa
- G. Susoy
- Physics Department, Faculty of Science, Istanbul University, 34459 Vezneciler, Istanbul, Turkey
- J.H. Thies
- Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, D-48149 Münster, Germany
- T. Suzuki
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- M. Yosoi
- Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
- J. Zenihiro
- RIKEN, Nishina Center, Wako, Saitama 351-0198, Japan
- Journal volume & issue
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Vol. 744
pp. 7 – 12
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
