Abstract
A photon scattering experiment with bremsstrahlung has been performed on the vibrational nucleus 142Ce up to a photon endpoint energy of 4.1MeV. Fourteen dipole excitations have been observed between 2.1 and 3.9MeV, five of them for the first time. A candidate for the 1−dipole member of the recently proposed quintuplet of negative parity (2+1,ms⊗3−1)(J−), involving the 2+1,ms
isovector quadrupole excitation in the valence shell, has been identified. This exotic 1−msstate has been predicted within the sdf-IBM-2 and is expected to be accessible to photon scattering measurements. Solely one of nine J=1 states in the energy region of interest shows a decay pattern compatible with the model predictions for the 1−ms state.
isovector quadrupole excitation in the valence shell, has been identified. This exotic 1−msstate has been predicted within the sdf-IBM-2 and is expected to be accessible to photon scattering measurements. Solely one of nine J=1 states in the energy region of interest shows a decay pattern compatible with the model predictions for the 1−ms state.
Original language | English |
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Article number | 054321 |
Journal | Physical Review C |
Volume | 69 |
Issue number | 5 |
DOIs | |
Publication status | Published - May 2004 |
Externally published | Yes |