TY - JOUR
T1 - Strong M1 components in 3i-→31- Transitions in nearly spherical nuclei
T2 - Evidence for isovector-octupole excitations
AU - Scheck, M.
AU - Butler, P. A.
AU - Fransen, C.
AU - Werner, V.
AU - Yates, S. W.
PY - 2010/6/4
Y1 - 2010/6/4
N2 - An evaluation of data obtained in (n,n′γ) experiments reveals strong M1 3i-→31- transitions in nuclei near the N=50 (Zr92, Mo94, and Mo96), Z=50 (Cd112 and Cd114), and N=82 (Nd144) shell closures. The observed 31-||M1||3i-matrix elements scale with the 21+||M1||2ms+matrix elements connecting the mixed-symmetric and symmetric quadrupole excitations. In accordance with a picture of a mixed two-component quantum system, the energy difference between the initial 3i- state and the 31- octupole phonon is proportional to the |31-||E3||0gs+|matrix element. The possibility of assigning the 3- states of interest as octupole isovector states is discussed.
AB - An evaluation of data obtained in (n,n′γ) experiments reveals strong M1 3i-→31- transitions in nuclei near the N=50 (Zr92, Mo94, and Mo96), Z=50 (Cd112 and Cd114), and N=82 (Nd144) shell closures. The observed 31-||M1||3i-matrix elements scale with the 21+||M1||2ms+matrix elements connecting the mixed-symmetric and symmetric quadrupole excitations. In accordance with a picture of a mixed two-component quantum system, the energy difference between the initial 3i- state and the 31- octupole phonon is proportional to the |31-||E3||0gs+|matrix element. The possibility of assigning the 3- states of interest as octupole isovector states is discussed.
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U2 - 10.1103/PhysRevC.81.064305
DO - 10.1103/PhysRevC.81.064305
M3 - Article
AN - SCOPUS:77953494832
SN - 0556-2813
VL - 81
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
IS - 6
M1 - 064305
ER -