https://doi.org/10.1140/epja/i2010-10966-2
Regular Article - Experimental Physics
Interaction of loosely bound radioactive 7Be and stable 7Li with 9Be
1
Department of Physics and Astrophysics, University of Delhi, 110007, Delhi, India
2
Inter University Accelerator Centre, 110067, New Delhi, India
3
Department of Physics, Gauhati University, 781014, Guwahati, India
4
Nuclear Physics Division, Bhabha Atomic Research Centre, 400085, Mumbai, India
* e-mail: sverma@physics.du.ac.in
Received:
10
December
2009
Revised:
26
March
2010
Accepted:
29
March
2010
Published online:
25
April
2010
Quasielastic scattering angular distributions have been measured for the 7Be + 9Be system at E
lab = 17 , 19 and 21MeV in the angular range = 24° - 57° . An optical model (OM) analysis of these data has been carried out in order to extract optical potential parameters and reaction cross-sections. One-proton stripping cross-sections were also measured for this system at E
lab = 19 and 21MeV. These transfer angular-distribution data were compared with the finite-range distorted-wave Born approximation (FRDWBA) calculations. For the 7Li + 9Be system quasielastic scattering angular distributions were measured and emitted light charged particles were detected at E
lab = 15.75 , 24.00 and 30.00MeV in the angular range
= 7° - 70° . Fusion cross-sections were obtained by reproducing the measured
-evaporation spectra from the compound nucleus at backward angles with the statistical model calculations. The ratios of the experimental fusion cross-sections to the total reaction cross-sections (obtained from OM analysis) were found to be small. This result suggests that the break-up process has a strong influence on the fusion process leading to a reduction in the fusion cross-section.
© SIF, Springer-Verlag Berlin Heidelberg, 2010