Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf

1 Publication
The structure of 113Sn from proton and alpha-particle induced reactions
Käubler, L.; Lobach, Y. N.; Trishin, V. V.; Pasternak, A. A.; Kudojarov, M. F.; Prade, H.; Reif, J.; Schwengner, R.; Winter, G.; Blomqvist, J.; Döring, J.;
The result of in-beam investigation of 113Sn using the (p,n),
(p,3n), (alpha,n) and (alpha,2n) reactions are summarized. Excited states
have been identified until Ex=4715 MeV and JPi=(27/2-).
For a large number of levels mean lifetimes tau have been determined with
the DSA method. For the JPi=25/2+ state at Ex=4059
MeV, tau=1.0(4) ns has been measured with the gamma-RF method. The experimental
results are compared with the predictions of shell-model calculations.
Most of the positive-parity states may be considered as one- or three-quasiparticle
neutron excitations of the 2d5/2, 1g7/2, 3s1/2
and 2d3/2 shells, the negative-parity states asthe coupling
of one 1h11/2 neutron to the two- or four-quasiparticle neutron
excitations in even-mass 112Sn core. For the 25/2+
isomer the three-quasiparticle neutron configuration v(h211/2g-17/2)
has been proposed on the basis of a shell-model analysis using the mass-formula
formalism. The experimentally observed yrast states in 11350Sn63
are compared with the corresponding states in the valence mirror nucleus
14563Eu82 giving remarkable similarities
although the parameters for the shell-model calculations differ considerably.
The analysis of nearest.neighbour spacing distributions of experimentally
obtained 5/2+ states in 113Sn does not allow definite
conclusions about regularity or chaos.
  • Zeitschrift für Physik A 358, 303-315 (1997)

Publ.-Id: 845 - Permalink