Evidence for the microscopic formation of mixed-symmetry states from magnetic moment measurements

Werner V., Benczer-Koller N., Kumbartzki G., Holt J. D., Boutachkov P., Stefanova E., ...Daha Fazla

PHYSICAL REVIEW C, cilt.78, sa.3, 2008 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 78 Sayı: 3
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1103/physrevc.78.031301
  • Dergi Adı: PHYSICAL REVIEW C
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • İstanbul Üniversitesi Adresli: Evet

Özet

Using the transient field technique, the magnetic moments of the second excited 2(+) states in (92,94)Zr have been measured for the first time. The large positive g factors, g( 2(2)(+); (92)Zr) = + 0.76(50) and g(2(2)(+); (94)Zr) = + 0.88( 27), which are in contrast to the known negative g factors of the 2(1)(+) states, are found to be a consequence of weak proton-neutron coupling combined with the Z = 40 subshell closure. From their large M1 transition strengths to the 2(1)(+) states, in earlier works an assignment to the 2(2)(+) states as proton-neutron symmetric and mixed-symmetry states has been made, which are now found to be polarized in their proton-neutron content. This fact allows to identify the underlying microscopic main configurations in the wave functions, which form the building blocks of symmetric and mixed-symmetry states in this region as valence nucleons are added and shell structure changes.