Investigation of 6He cluster structures
Abstract
The α+2n and t+t clustering of the 6He ground state were investigated by means of the transfer reaction 6He(p,t)4He at 25 MeV/nucleon. The experiment was performed in inverse kinematics at GANIL with the SPEG spectrometer coupled to the MUST array. Experimental data for the transfer reaction were analyzed by a distorted wave Born approximation (DWBA) calculation, including the two neutrons and the triton transfer. The couplings to the 6He→4He+2n breakup channels were taken into account with a polarization potential deduced from a coupled-discretized-continuum channels analysis of the 6He+1H elastic scattering measured at the same time. The influence on the calculations of the α+t exit potential and of the triton sequential transfer is discussed. The final calculation gives a spectroscopic factor close to one for the α+2n configuration as expected. The spectroscopic factor obtained for the t+t configuration is much smaller than the theoretical predictions.
- Publication:
-
Physical Review C
- Pub Date:
- June 2005
- DOI:
- 10.1103/PhysRevC.71.064311
- arXiv:
- arXiv:nucl-ex/0505007
- Bibcode:
- 2005PhRvC..71f4311G
- Keywords:
-
- 25.60.-t;
- 24.10.Eq;
- 27.20.+n;
- 21.10.Jx;
- Reactions induced by unstable nuclei;
- Coupled-channel and distorted-wave models;
- 6<
- =A<
- =19;
- Spectroscopic factors and asymptotic normalization coefficients;
- Nuclear Experiment
- E-Print:
- 10 pages, 11 figures, accepted in PRC