Spectroscopic factors of neutron-hole and proton-hole states in Sn131 and In131, respectively, were measured using one-nucleon removal reactions from doubly magic Sn132 at relativistic energies. For In131, a 2910(50)-keV γ ray was observed for the first time and tentatively assigned to a decay from a 5/2-state at 3275(50) keV to the known 1/2-level at 365 keV. The spectroscopic factors determined for this new excited state and three other single-hole states provide first evidence for a strong fragmentation of single-hole strength in Sn131 and In131. The experimental results are compared to theoretical calculations based on the relativistic particle-vibration coupling model and to experimental information for single-hole states in the stable doubly magic nucleus Pb208.
Fragmentation of Single-Particle Strength around the Doubly Magic Nucleus Sn 132 and the Position of the 0f5/2 Proton-Hole State in In 131 / V. Vaquero, A. Jungclaus, T. Aumann, J. Tscheuschner, E.V. Litvinova, J.A. Tostevin, H. Baba, D.S. Ahn, R. Avigo, K. Boretzky, A. Bracco, C. Caesar, F. Camera, S. Chen, V. Derya, P. Doornenbal, J. Endres, N. Fukuda, U. Garg, A. Giaz, M.N. Harakeh, M. Heil, A. Horvat, K. Ieki, N. Imai, N. Inabe, N. Kalantar-Nayestanaki, N. Kobayashi, Y. Kondo, S. Koyama, T. Kubo, I. Martel, M. Matsushita, B. Million, T. Motobayashi, T. Nakamura, N. Nakatsuka, M. Nishimura, S. Nishimura, S. Ota, H. Otsu, T. Ozaki, M. Petri, R. Reifarth, J.L. Rodriguez-Sanchez, D. Rossi, A.T. Saito, H. Sakurai, D. Savran, H. Scheit, F. Schindler, P. Schrock, D. Semmler, Y. Shiga, M. Shikata, Y. Shimizu, H. Simon, D. Steppenbeck, H. Suzuki, T. Sumikama, D. Symochko, I. Syndikus, H. Takeda, S. Takeuchi, R. Taniuchi, Y. Togano, J. Tsubota, H. Wang, O. Wieland, K. Yoneda, J. Zenihiro, A. Zilges. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 124:2(2020 Jan 13), pp. 022501.022501-1-022501.022501-8. [10.1103/PhysRevLett.124.022501]
Fragmentation of Single-Particle Strength around the Doubly Magic Nucleus Sn 132 and the Position of the 0f5/2 Proton-Hole State in In 131
R. Avigo;A. Bracco;F. Camera;A. Giaz;
2020
Abstract
Spectroscopic factors of neutron-hole and proton-hole states in Sn131 and In131, respectively, were measured using one-nucleon removal reactions from doubly magic Sn132 at relativistic energies. For In131, a 2910(50)-keV γ ray was observed for the first time and tentatively assigned to a decay from a 5/2-state at 3275(50) keV to the known 1/2-level at 365 keV. The spectroscopic factors determined for this new excited state and three other single-hole states provide first evidence for a strong fragmentation of single-hole strength in Sn131 and In131. The experimental results are compared to theoretical calculations based on the relativistic particle-vibration coupling model and to experimental information for single-hole states in the stable doubly magic nucleus Pb208.
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