학술논문
Observation of isotonic symmetry for enhanced quadrupole collectivity in neutron-rich 62,64,66Fe isotopes at N=40
Document Type
Working Paper
Author
Rother, W.; Dewald, A.; Iwasaki, H.; Lenzi, S. M.; Starosta, K.; Bazin, D.; Baugher, T.; Brown, B. A.; Crawford, H. L.; Fransen, C.; Gade, A.; Ginter, T. N.; Glasmacher, T.; Grinyer, G. F.; Hackstein, M.; Ilie, G.; Jolie, J.; McDaniel, S.; Miller, D.; Petkov, P.; Pissulla, Th.; Ratkiewicz, A.; Ur, C. A.; Voss, P.; Walsh, K. A.; Weisshaar, D.; Zell, K. -O.
Source
Phys.Rev.Lett.106:022502,2011
Subject
Language
Abstract
The transition rates for the 2_{1}^{+} states in 62,64,66Fe were studied using the Recoil Distance Doppler-Shift technique applied to projectile Coulomb excitation reactions. The deduced E2 strengths illustrate the enhanced collectivity of the neutron-rich Fe isotopes up to N=40. The results are interpreted by the generalized concept of valence proton symmetry which describes the evolution of nuclear structure around N=40 as governed by the number of valence protons with respect to Z~30. The deformation suggested by the experimental data is reproduced by state-of-the-art shell calculations with a new effective interaction developed for the fpgd valence space.
Comment: 4 pages, 2 figures
Comment: 4 pages, 2 figures