Intermediate-energy Coulomb excitation of 104Sn : Moderate E2 strength decrease approaching 100Sn

Doornenbal, P. and Takeuchi, S. and Aoi, N. and Matsushita, M. and Obertelli, A. and Steppenbeck, D. and Wang, H. and Audirac, L. and Baba, H. and Bednarczyk, P. and Boissinot, S. and Ciemala, M. and Corsi, A. and Furumoto, T. and Isobe, T. and Jungclaus, A. and Lapoux, V. and Lee, J. and Matsui, K. and Motobayashi, T. and Nishimura, D. and Ota, S. and Pollacco, E. C. and Sakurai, H. and Santamaria, C. and Shiga, Y. and Kunné Sohler, Dorottya and Taniuchi, R. (2014) Intermediate-energy Coulomb excitation of 104Sn : Moderate E2 strength decrease approaching 100Sn. PHYSICAL REVIEW C, 90 (6). ISSN 2469-9985

Preview

Text 1305.2877.pdf Available under License Creative Commons Attribution. Download (245kB) | Preview

Abstract

The reduced transition probability B(E2)↑ of the first excited 2+ state in the nucleus 104Sn was measured via Coulomb excitation in inverse kinematics at intermediate energies. A value of 0.163(26) e2b2 was extracted from the absolute cross-section on a Pb target, while the method itself was verified with the stable 112Sn isotope. Our result deviates significantly from the earlier reported value of 0.10(4) e2b2 and corresponds to a moderate decrease of excitation strength relative to the almost constant values observed in the proton-rich, even-A 106–114Sn isotopes. Present state-of-the-art shell-model predictions, which include proton and neutron excitations across the N = Z = 50 shell closures as well as standard polarization charges, underestimate the experimental findings.

Actions (login required)

Edit Item