Enhanced strength of the 2(1)(+) -> 0(g.s.)(+) transition in Sn-114 studied via Coulomb excitation in inverse kinematics

Summary, in English

The 2(1)(+) states of Sn-114,Sn-116 were excited in two consecutive experiments by means of Coulomb excitation in inverse kinematics on a Ni-58 target. A precise determination of the reduced transition probability B(E2; 0(g.s.)(+) -> 2(1)(+)) of Sn-114 relative to the well-known 2(1)(+) excitation strength in Sn-116 was achieved by comparing the relative projectile to target 2(1)(+) -> 0(g.s.)(+) decay intensities. The obtained B(E2 up arrow) value of 0.232(8)e(2)b(2) for Sn-114 confirms the tendency of large B(E2 up arrow) values for the light tin isotopes below the midshell Sn-116 that has been observed recently in various radioactive ion beam experiments. The result establishes most clearly the discrepancy between the current B(E2 up arrow) value predictions from large-scale shell-model calculations and the experimental deviation, which commences already for the stable Sn-114 isotope.

• Author: P. Doornenbal; P. Reiter; H. Grawe; H. J. Wollersheim; P. Bednarczyk; L. Caceres; Joakim Cederkäll; Andreas Ekström; J. Gerl; M. Gorska; A. Jhingan; I. Kojouharov; R. Kumar; W. Prokopowicz; H. Schaffner; R. P. Singh
• Department/s: Nuclear physics
• Publishing year: 2008
• Language: English
• Publication/Series: Physical Review C (Nuclear Physics)
• Volume: 78
• Issue: 3
• Links: http://dx.doi.org/10.1103/PhysRevC.78.031303
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 0556-2813