Compound nuclear lifetimes at high excitation energies via a new statistical fluctuation method (Journal article)

Casandjian, J. M./ Mittig, W./ Pakou, A./ Alamanos, N./ Auger, G./ Auger, F./ Chartier, M./ Cortina-Gil, D./ Fekou-Youmbi, V./ Fernandez, B./ Gillibert, A./ Lepine, A./ MacCormick, M./ Ostrowski, A./ Roussel-Chomaz, P./ Sida, J. L.

A new method to determine compound nuclear lifetimes at high excitation energies is proposed and applied to the system C-12(Si-28, alpha)Ar-36 at two different bombarding energies, 190 and 277 MeV. The alpha particle spectra show a structure which directly reflects the fluctuating behavior of the first de-excitation step. Coherence widths and thus lifetimes for the nucleus Ar-36 were obtained via a correlation function analysis. The results at low excitation energies are consistent with standard statistical models while the result at high excitation energy is compatible with a theoretically predicted change of the level density parameter. (C) 1998 Published by Elsevier Science B.V. All rights reserved.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Επιστημών και Τεχνολογιών. Τμήμα Βιολογικών Εφαρμογών και Τεχνολογιών
URI: https://olympias.lib.uoi.gr/jspui/handle/123456789/16471
ISSN: 0370-2693
Link: <Go to ISI>://000074952700007
http://ac.els-cdn.com/S0370269398003426/1-s2.0-S0370269398003426-main.pdf?_tid=c52839771bece81ff5389fceca906e3f&acdnat=1334230130_6723e0ccef9fc3d0837dc43f822cecba
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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