Eur. Phys. J. A 12, 399-404 (2001)
Two-neutron elastic transfer
at
MeV
I.V. Krouglov1, 2, M. Avrigeanu3 and W. von Oertzen1, 4
1 Hahn-Meitner-Institut Berlin, Glienicker Strasse 100, 14109 Berlin, Germany
2 St. Petersburg State University, Nuclear Physics Department, Uljanovskaja str. 1, 198904 St. Petersburg, Russia
3 "Horia Hulubei" National Institute for Physics and Nuclear Engineering, P.O. Box MG-6, 76900 Bucharest, Romania
4 Freie Universität Berlin, Fachbereich Physik, Arnimallee 14, 14195 Berlin, Germany
kruglov@nuclpc1.phys.spbu.ru
oertzen@hmi.de
(Received: 29 October 2001 Communicated by W.F. Henning)
Abstract
Using the framework of the coupled reaction channels (CRC) the
elastic scattering and the elastic transfer in the system
measured at
E=151 MeV have been analysed. It is shown
that the structure observed in the backward range of the angular
distributions is influenced by the interference of the elastic 2n-transfer
with a two-step process passing through the 2
+ excitation in
6He.
The two-neutron transfer mechanism is studied
in the microscopic approach and it is found that for the ground-state
transition the one step dominates by
a factor 10 over the two-step mechanism at this energy.
24.10.Eq - Coupled-channel and distorted-wave models.
25.70.Bc - Elastic and quasielastic scattering.
25.60.Bx - Elastic scattering.
© Società Italiana di Fisica, Springer-Verlag 2001
