The reactions 30Si + 170Er and 29Si + 170Er have been studied by the particle-γ coincidence method. The first chance α-particle spectrum from the decay of the 200Pb compound nucleus at 80 MeV excitation energy has been obtained by using a subtraction technique. The emission barrier distribution has been extracted from the first chance spectrum, using the second derivative analysis, commonly employed in sub-barrier fusion studies. The comparison with earlier systematics demonstrates that the α-particle emission barriers of the excited systems are lower than those observed in the inverse (capture) reactions on ground state nuclei. 2001 Elsevier Science B.V. All rights reserved.
Exploring the emission barriers in hot nuclei / G., Viesti; V., Rizzi; D., Fabris; M., Lunardon; G., Nebbia; M., Cinausero; E., Fioretto; G., Prete; Brondi, Augusto; LA RANA, Giovanni; Moro, RENATA EMILIA MARIA; Vardaci, Emanuele; M., Aiche; M. M., Aleonard; G., Barreau; D., Boivin; J. N., Scheurer; J. F., Chemin; K., Hagel; J. B., Natowitz; R., Wada; S., Courtin; F., Haas; N., Rowley; B. M., Nyakó; J., Gál; J. M. o. l. n. á., R.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - STAMPA. - 521:(2001), pp. 165-170. [10.1016/S0370-2693(01)01221-7]
Exploring the emission barriers in hot nuclei
BRONDI, AUGUSTO;LA RANA, GIOVANNI;MORO, RENATA EMILIA MARIA;VARDACI, EMANUELE;
2001
Abstract
The reactions 30Si + 170Er and 29Si + 170Er have been studied by the particle-γ coincidence method. The first chance α-particle spectrum from the decay of the 200Pb compound nucleus at 80 MeV excitation energy has been obtained by using a subtraction technique. The emission barrier distribution has been extracted from the first chance spectrum, using the second derivative analysis, commonly employed in sub-barrier fusion studies. The comparison with earlier systematics demonstrates that the α-particle emission barriers of the excited systems are lower than those observed in the inverse (capture) reactions on ground state nuclei. 2001 Elsevier Science B.V. All rights reserved.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
