Isospin effects on multifragmentation properties were studied thanks to nuclear collisions between different isotopes of xenon beams and tin targets. It is shown that, in central collisions leading to multifragmentation, the mean number of fragments and their mean kinetic energy increase with the neutron-richness of the total system. Comparisons with a stochastic transport model allow to attribute the multiplicity increase to the multifragmentation stage, before secondary decay. The total charge bound in fragments is proposed as an alternate variable to quantify preequilibrium emission and to investigate symmetry energy effects.
New isospin effects in central heavy-ion collisione at Fermi energies / F., Gagnon Moisan; E., Galichet; M. F., Rivet; B., Borderie; M., Colonna; R., Roy; P., Pawloski; E., Bonnet; N., Le Neindre; Raduta, A. d. R.; R., Bougault; A., Chbihi; J. D., Frankland; D., Guinet; P., Lautesse; J., Lukasik; P., Marini; M., Parlog; Rosato, Elio; Spadaccini, Giulio; Vigilante, Mariano; J. P., Wieleczko. - In: PHYSICAL REVIEW. C, NUCLEAR PHYSICS. - ISSN 0556-2813. - 86:4(2012), pp. 1-9. [10.1103/PhysRevC.86.044617]
New isospin effects in central heavy-ion collisione at Fermi energies
ROSATO, ELIO;SPADACCINI, GIULIO;VIGILANTE, MARIANO;
2012
Abstract
Isospin effects on multifragmentation properties were studied thanks to nuclear collisions between different isotopes of xenon beams and tin targets. It is shown that, in central collisions leading to multifragmentation, the mean number of fragments and their mean kinetic energy increase with the neutron-richness of the total system. Comparisons with a stochastic transport model allow to attribute the multiplicity increase to the multifragmentation stage, before secondary decay. The total charge bound in fragments is proposed as an alternate variable to quantify preequilibrium emission and to investigate symmetry energy effects.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
