Hurst, A.M., Butler, P.A., Jenkins, D.G. et al. (43 more authors) (2007) Measurement of the sign of the spectroscopic quadrupole moment for the 21+ state in 70Se: no evidence for oblate shape. Physical Review Letters, 98 (7). Art. No. 072501. ISSN 1079-7114
Using a method whereby molecular and atomic ions are independently selected, an isobarically pure beam of 70Se ions was postaccelerated to an energy of 206 MeV using REX-ISOLDE. Coulomb-excitation yields for states in the beam and target nuclei were deduced by recording deexcitation rays in the highly segmented MINIBALL -ray spectrometer in coincidence with scattered particles in a silicon detector. At these energies, the Coulomb-excitation yield for the first 2+ state is expected to be strongly sensitive to the sign of the spectroscopic quadrupole moment through the nuclear reorientation effect. Experimental evidence is presented here for a prolate shape for the first 2+ state in 70Se, reopening the question over whether there are, as reported earlier, deformed oblate shapes near to the ground state in the light selenium isotopes.
|Institution:||The University of York|
|Academic Units:||The University of York > Physics (York)|
|Depositing User:||York RAE Import|
|Date Deposited:||31 Jul 2009 12:50|
|Last Modified:||31 Jul 2009 12:50|
|Publisher:||The American Physical Society.|