OMPs for the 6 He + 209 Bi halo system from a 208 Pb(7 Li,6 He)209 Bi reaction analysis
Abstract
Angular distributions of transfer reaction {^{208}} Pb( 7 Li, {6} He) {^{209}} Bi were measured at E_{{lab}} ( {^7} Li)= 21.2 , 24.3, 25.67 and 28.55MeV. By fitting the experimental data with the theoretical frameworks of Distorted Wave Born Approximation (DWBA), the optical model parameters of the halo nuclear system 6 He + 209 Bi were extracted. The breakup threshold anomaly (BTA) was observed clearly in the imaginary potential, and a further decreasing trend in the deep sub-barrier region was observed for the first time in a halo system. Furthermore, the dispersion relation is found of no use to describe the connection between the real and imaginary parts.
- Publication:
-
Nuovo Cimento C Geophysics Space Physics C
- Pub Date:
- September 2017
- DOI:
- 10.1393/ncc/i2016-16367-9
- Bibcode:
- 2017NCimC..39..367Y