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Rapid decrease of fragment emission time in the range of 3-5 MeV/u excitation energy

par Louvel, Michel;Genoux-Lubain, A.;Bizard, G.;Bougault, R.;Brou, R.;Buta, A.;Durand, Dominique;Hagel, Kris;Hamdani, T.;Laville, J.L.;Le Brun, Christian;Lecolley, Jean François;Motobayashi, Tohru;Péter, Jean;Regimbart, R.;Steckmeyer, Jean Claude;Doubre, H.;Jin, Genming G.M.;Péghaire, Alain;Saint-Laurent, François;El Masri, Youssef;Fugiwara, H.;Jeong, Sunchan S.C.;Kato, Sumio;Lee, Sangmoo S.M.;Hanappe, Francis ;Matsuse, Takehiro;Tamain, Bernard
Référence Physics letters. Section B, 320, 3-4, page (221-226)
Publication Publié, 1994

Article révisé par les pairs

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Résumé :

Multifragment emission processes from highly excited nuclei produced in 40Ar+197Au reactions at incident energies of 30 and 60 McV/u are compared. At the lowest bombarding energy and 3.3 MeV/u excitation energy, the composite system decay process supports the hypothesis of long-lived equilibrated nuclei decaying by successive binary splittings. For excited nuclei around 5 MeV/u, the depletion observed at small relative angles in the correlation functions is interpreted as the result of a strong reduction in the fragment emission time scale.