2020 Impact factor 3.043
Hadrons and Nuclei

Eur. Phys. J. A 12, 399-404 (2001)

Two-neutron elastic transfer $\chem{^{4}He(^{6}He,{}^{4}He){}^{6}He}$ at $\mth{E=151}$ 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


(Received: 29 October 2001 Communicated by W.F. Henning)

Using the framework of the coupled reaction channels (CRC) the elastic scattering and the elastic transfer in the system $\chem{^{6}He
+{}^{4}He}$ 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