九大原子核セミナー

2015年2月16日(月) 16:30

講師：Pierre Descouvemont (Université Libre de Bruxelles)

演題：CDCC description of 9Be+208Pb scattering around the Coulomb barrier

場所：理学部 物理大学院講義室(理学部2号館2階2263室)

概要：
　We investigate the 9Be+208Pb scattering at energies around the Coulomb barrier. The 9Be nucleus is described in a α+α+n three-body
model, using the hyperspherical coordinate method. We first analyse spectroscopic properties of 9Be, and show that the model provides a
fairly good description of the low-lying states. The scattering with 208Pb is then studied with the Continuum Discretized Coupled Channel
(CDCC) method, where the α+α+n continuum is approximated by a
discrete number of pseudostates. The use of a three-body model for 9Be
improves previous theoretical works, where 9Be is assumed to have a
two-body structure (8Be+n or 5He+α), although neither 8Be nor 5He
are bound.
　Optical potentials for the α+208Pb and n+208Pb systems are taken
from the literature. We present elastic-scattering, breakup and fusion
cross sections at different energies, and investigate the convergence
with respect to the truncation of the α+α+n continuum. We show that continuum effects increase at low energies.