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Transfer reactions and sequential decays of the projectile-like fragments in the 60 MeV/nucleon 40Ar + natAg, 197Au Reactions

par Steckmeyer, Jean Claude;Bizard, G.;Brou, R.;Eudes, Ph;Laville, J.L.;Natowitz, Joseph;Patry, J.P.;Tamain, Bernard;Thiphagne, A.;Doubre, H.;Péghaire, Alain;Péter, Jean;Rosato, Elio;Adloff, J.C.;Amili, A.K.;Rudolf, Gérard;Scheibling, F.;Guilbault, F.;Lebrun, Christian;Hanappe, Francis
Référence Nuclear physics. A, 500, 2, page (372-398)
Publication Publié, 1989-08

Article révisé par les pairs

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Résumé :

Light charged particles and nuclei (1≤Z≤8) have been detected in a large forward plastic multidetector (3° < θ <30°) in coincidence with projectile-like fragments (5≤Z≤ 19) in the 40Ar+ natAg and 40Ar + 197Au reactions at 60 MeV/nucleon bombarding energy. It is shown that transfer reactions from the projectile to the target are still present at such a high incident energy. Most of the coincident Z = 2 particles are found to be sequentially emitted by excited primary projectile-like fragments. The sequential decay pattern is also observed with the Z = 1 particles, but the main part of those particles probably arise from other mechanisms such as direct and/or pre-equilibrium emission. An attempt is made to derive the excitation energies of the primary projectile-like fragments from these coincident events. The data are not reproduced by the usual models such as the high-energy-abrasion model, the equal-temperature-limit assumption or the equal partition of the excitation energy. © 1989.