Events with 2, 3 and 4 heavy fragments (A≥20) detected in the reactions100Mo +100Mo at 18.7, 23.7 A·MeV and120Sn +120Sn at 18.4 A·MeV were analyzed by means of an improved version of the kinematic coincidence method. The phase-space distributions prove that 3- (and possibly 4-) body events predominantly originate from a two-step mechanism and are compatible with the hypothesis of a binary deep-inelastic interaction followed by the further fissionlike decay of one (or both) of the primary fragments. The characteristics of the fission step — mass asymmetry, relative velocity, in-plane and out-of-plane angles — have been reconstructed for the 3-body events and indications are found that nonequilibrium effects at the end of the deep-inelastic phase may influence the fissionlike decay.
Analysis of the sequential fission observed in collisions of100Mo +100Mo and120Sn +120Sn around 20 A·MeV / Stefanini, A.A; Casini, G.; Maurenzig, P.R.; Olmi, A.; Charity, R.J.; Freifelder, R.; Gobbi, A.; Herrmann, N.; Hildenbrand, K.D.; Petrovici, M.; Rami, F.; Stelzer, H.; Wessels, J.P.; Gnirs, M.; Pelte, D.; Galin, J.; Guerreau, D.; Jahnke, U.; Péghaire, A.; Adloff, J.C.; Bilwes, B.; Bilwes, R.; Rudolf, G.. - In: ZEITSCHRIFT FÜR PHYSIK. A, HADRONS AND NUCLEI. - ISSN 0939-7922. - STAMPA. - 351:(1995), pp. 167-186. [10.1007/BF01289527]
Analysis of the sequential fission observed in collisions of100Mo +100Mo and120Sn +120Sn around 20 A·MeV
STEFANINI, ANDREA;CASINI, GIOVANNI;MAURENZIG, PAOLO;OLMI, ALESSANDRO;
1995
Abstract
Events with 2, 3 and 4 heavy fragments (A≥20) detected in the reactions100Mo +100Mo at 18.7, 23.7 A·MeV and120Sn +120Sn at 18.4 A·MeV were analyzed by means of an improved version of the kinematic coincidence method. The phase-space distributions prove that 3- (and possibly 4-) body events predominantly originate from a two-step mechanism and are compatible with the hypothesis of a binary deep-inelastic interaction followed by the further fissionlike decay of one (or both) of the primary fragments. The characteristics of the fission step — mass asymmetry, relative velocity, in-plane and out-of-plane angles — have been reconstructed for the 3-body events and indications are found that nonequilibrium effects at the end of the deep-inelastic phase may influence the fissionlike decay.
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
