Deformation of the proton emitter 113Cs from electromagnetic transition and proton-emission rates

D. Hodge, D. M. Cullen, M. J. Taylor, B. S. Nara Singh, L. S. Ferreira, E. Maglione, J. F. Smith, C. Scholey, P. Rahkila, T. Grahn, Th. Braunroth, H. Badran, L. Capponi, A. Girka, P.T. Greenlees, R. Julin, J. Konki, M. Mallaburn, O. Nefodov, G. G. O'NeillJ. Pakarinen, Phillipos Papadakis, J. Partanen, P. Ruotsalainen, M. Sandzelius, J. Sarén, M. Smolen, J. Sorri, S. Stolze, J. Uusitalo

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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.
Original languageEnglish
Article number034321
Number of pages8
JournalPhysical Review C
Early online date21 Sept 2016
Publication statusPublished - 21 Sept 2016


  • collective models
  • electromagnetic transitions
  • lifetimes and widths
  • nuclear structure and decays
  • proton emission
  • spectroscopic factors andelectromagnetic moments


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