Bibcode
Nouicer, R.; Beck, C.; Sanders, S. J.; Szanto de Toledo, A.; Cavallaro, Sl.
Bibliographical reference
eprint arXiv:nucl-ex/9711002
Advertised on:
11
1997
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Description
Fragment-fragment-$gamma$ triple coincident measurements of the
$^{28}$Si + $^{28}$Si reaction at E$_{lab.}$ = 111.6 MeV carefully
chosen to populate J = 38$^{+}$ resonance have been performed at the
VIVITRON tandem facility by using Eurogam Phase II $gamma$-ray
spectrometer. In the $^{28}$Si + $^{28}$Si exit-channel, the resonance
behavior of the $^{28}$Si + $^{28}$Si reaction at the beam energy is
clearly confirmed. An unexpected spin disalignment has been observed in
the measured angular distributions in the elastic, inelastic, and mutual
excitation channels. This disalignment is found to be consistent with
particle-$gamma$ angular correlations and supported by the molecular
model prediction of a "butterfly motion". The K$^{pi}$ = 0$^{+}_{3}$
band corresponding to the large prolate deformation of the $^{28}$Si is
more intensely fed in the resonance region. The selective population of
high-excited states are discussed within a statistical fusion-fission
model. In the $^{32}$S + $^{24}$Mg exit-channel, the spectroscopic study
of the $^{32}$S, has revealed the contribution of a new $gamma$-ray
transition $0^{+} (8507.8 keV) o 2^{+}_{1} (2230.2 keV) $.