Deformation of the proton emitter 113Cs from electromagnetic transition and proton-emission rates
Hodge, D., Cullen, D. M., Taylor, M. J., Singh, B. S. N., Ferreira, L. S., Maglione, E., . . . Uusitalo, J. (2016). Deformation of the proton emitter 113Cs from electromagnetic transition and proton-emission rates. Physical Review C, 94 (3), 034321. doi:10.1103/PhysRevC.94.034321
Published inPhysical Review C
© the Authors, 2016. This is an open access article published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License.
The lifetime of the (11/2+) state in the band above the proton-emitting (3/2+) state in 113Cs has been measured to be τ = 24(6) ps from a recoil-decay-tagged differential-plunger experiment. The measured lifetime was used to deduce the deformation of the states using wave functions from a nonadiabatic quasiparticle model to independently calculate both proton-emission and electromagnetic γ -ray transition rates as a function of deformation. The only quadrupole deformation, which was able to reproduce the experimental excitation energies of the states, the electromagnetic decay rate of the (11/2+) state and the proton-emission rate of the (3/2+) state, was found to be β2 = 0.22(6). This deformation is in agreement with the earlier proton emission studies which concluded that 113Cs was best described as a deformed proton emitter, however, it is now more firmly supported by the present measurement of the electromagnetic transition rate.