Bibcode
Rousseau, M.; Beck, C.; Bhattacharya, C.; Rauch, V.; Dorvaux, O.; Eddahbi, K.; Enaux, C.; Freeman, R. M.; Haas, F.; Papka, P.; Szilner, S.; Stezowski, O.; Szanto de Toledo, A.; Hachem, A.; Martin, E.; Sanders, S. J.; Mahboub, D.
Bibliographical reference
eprint arXiv:nucl-ex/0102008
Advertised on:
2
2001
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Description
The possible occurence of highly deformed configurations is investigated
in the $^{40}$Ca and $^{56}$Ni di-nuclear systems as formed in the
$^{28}$Si + $^{12}$C and $^{28}$Si + $^{28}$Si reactions, respectively,
by using the properties of emitted light charged particles. Inclusive as
well as exclusive data of the heavy fragments (A $geq$ 6) and their
associated light charged particles (p, d, t, and $alpha$-particles)
have been collected at the IReS Strasbourg VIVITRON Tandem facility with
two bombarding energies $E_{lab}(^{28}$Si) = 112 and 180 MeV by using
the ICARE charged particle multidetector array, which consists of nearly
40 telescopes. The measured energy spectra, velocity distributions,
in-plane and out-of-plane angular correlations are analysed by Monte
Carlo CASCADE statistical-model calculations using a consistent set of
parameters with spin-dependent level densities. Although significant
deformation effects at high spin are needed, the remaining disagreement
observed in the $^{28}$Si + $^{12}$C reaction for the S evaporation
residue suggests an unexpected large unstable $^{8}$Be cluster emission
of a binary nature.