Fusion hindrance for 27Al + 45Sc and other systems with a positive Q value

C. L. JIANG; K. E. REHM; H. ESBENSEN; B. B. BACK; R. V. F. JANSSENS; P. COLLON; C. M. DEIBEL; B. DI GIOVINE; J. M. FIGUEIRA; J. P. GREENE; D. J. HENDERSON; H. Y. LEE; M. NOTANI; S. T. MARLEY; R. C. PARDO; N. PATEL; D. SEWERYNIAK; X. D. TANG; C. UGALDE; S. ZHU

PHYS. REV. - C

Tha American Physical Society

Lugar: New York; Año: 2010 vol. 81 p. 1 - 7

0556-2813

Physical Review C 81, 024611 (2010).   ///   Fusion evaporation cross sections for the 27Al + 45Sc (Q = 9.63 MeV) system are measured down to about 300 nb. Deviations from standard coupled-channels calculations were observed in this system at the lowest energies. The steep fall-off of the fusion cross sections can be reproduced by calculations using a shallow potential model, which was originally developed to explain the hindrance behavior of heavy-ion fusion in medium-mass systems with negative Q values. Comparisons of the hindrance behavior between the present experiment and other systems, for example, 28Si + 30Si (Q = 14.3 MeV) and 36S + 48Ca (Q = 7.55 MeV) are presented.