TY - JOUR
T1 - Anomalous behavior of the 2+ mixed-symmetry state in Zr94
AU - Elhami, E.
AU - Orce, J. N.
AU - Mukhopadhyay, S.
AU - Choudry, S. N.
AU - Scheck, M.
AU - McEllistrem, M. T.
AU - Yates, S. W.
PY - 2007
Y1 - 2007
N2 - The low-spin structure of Zr94 has been studied with the (n,n'γ) reaction, and branching ratios, lifetimes, multipolarities and spin assignments were determined. The 22+ state at 1671.4 keV has been identified as the lowest mixed-symmetry state in Zr94. The 752.5-keV transition from this state to the 21+ level has a large B(M1) value of 0.33(5) μN2, and the B(E2) of the transition to the ground state has an unusually large value of 8(1) W.u. The M1 transition strength is in agreement with IBM-2 predictions in the U(5) vibrational limit, whereas the large B(E2;21,MS+→01+) value significantly exceeds the E2 strength predicted by the IBM-2. For the first time, the 21,MS+→01+E2 transition is observed to have a larger E2 transition strength than the 21+→01+ decay.
AB - The low-spin structure of Zr94 has been studied with the (n,n'γ) reaction, and branching ratios, lifetimes, multipolarities and spin assignments were determined. The 22+ state at 1671.4 keV has been identified as the lowest mixed-symmetry state in Zr94. The 752.5-keV transition from this state to the 21+ level has a large B(M1) value of 0.33(5) μN2, and the B(E2) of the transition to the ground state has an unusually large value of 8(1) W.u. The M1 transition strength is in agreement with IBM-2 predictions in the U(5) vibrational limit, whereas the large B(E2;21,MS+→01+) value significantly exceeds the E2 strength predicted by the IBM-2. For the first time, the 21,MS+→01+E2 transition is observed to have a larger E2 transition strength than the 21+→01+ decay.
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U2 - 10.1103/PhysRevC.75.011301
DO - 10.1103/PhysRevC.75.011301
M3 - Article
AN - SCOPUS:33846401776
SN - 0556-2813
VL - 75
JO - Physical Review C - Nuclear Physics
JF - Physical Review C - Nuclear Physics
IS - 1
M1 - 011301
ER -