Microscopic description of the beta delayed deuteron emission from \bbox{^6}He

Abstract

The beta delayed deuteron emission from ${}^6$He is studied in a dynamical microscopic cluster model. This model gives a reasonably good description for all the subsystems of ${}^6$He and ${}^6$Li in a coherent way, without any free parameter. The beta decay transition probability to the ${}^6$Li ground state is underestimated by a few percents. The theoretical beta delayed deuteron spectrum is close to experiment but it is also underestimated by about a factor 1.7. We argue that, in spite of their different magnitudes, both underestimations might have a common origin. The model confirms that the neutron halo part of the ${}^6$He wave function plays a crucial role in quenching the beta decay toward the $\alpha$ + d channel.

Comments: LATEX with REVTEX, Submitted to Phys. Rev. C, 11 pages, 3 figures (not included) are available upon request. ATOMKI-93/5