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., Smith, J. F., Scholey, C., Rahkila, P., Grahn, T., Braunroth, T., Badran, H., Capponi, L., Girka, A., Greenlees, P., Julin, R., Konki, J., Mallaburn, M., Nefodov, O., . . . Uusitalo, J. (2016). Deformation of the proton emitter 113Cs from electromagnetic transition and proton-emission rates. Physical Review C, 94(3), Article 034321. https://doi.org/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.