Capture reactions in the Ca40,48+197Au and Ca40,48+208Pb systems

PACHECO, A.J.; FERNANDEZ NIELLO, J.O.; DIGREGORIO, D.E.; DI TADA, M.; TESTONI, J.E.; CHAN, Y.; CHAVEZ, E.; GAZES, S.; PLAGNOL, E.; STOKSTAD, R.G.

PHYS. REV. - C

AMER PHYSICAL SOC

Año: 1992 vol. 45 p. 2861 - 2869

0556-2813

Capture-fission cross sections for Ca40,48+197Au and Ca40,48+208Pb have been measured at beam energies ranging from 195 to 416 MeV. The fissionlike fragments were detected in a pair of position-sensitive multiwire proportional counters and were identified from measurements of position and time using two-body kinematics. The data taken at energies above the barrier (up to 2.4 times the Coulomb barrier) were analyzed in terms of the extra push model showing a strong dependence on the Ca isotope. This dependence was also observed at energies below the barrier, where the results have been interpreted using a schematic coupled-channel code. © 1992 The American Physical Society.