Approximation of reduced width amplitude and application to cluster decay width

Yoshiko Kanada-En'yo, Tadahiro Suhara, Yasutaka Taniguchi
2014 Progress of Theoretical and Experimental Physics  
We propose a simple method to approximately evaluate reduced width amplitude (RWA) of a two-body spinless cluster channel using the norm overlap with the Brink-Bloch cluster wave function at the channel radius. The applicability of the present approximation is tested for the $^{16}$O+$\alpha$ channel in $^{20}$Ne as well as the $\alpha$+$\alpha$ channel in $^8$Be. The approximation is found to be reasonable to evaluate the RWA for states near the threshold energy and it is useful to estimate
more » ... eful to estimate the $\alpha$-decay width of resonance states. The approximation is also applied to $^9$Li, and the partial decay width of the $^6$He($0^+_1$)+$t$ channel is discussed.
doi:10.1093/ptep/ptu095 fatcat:kfmph3q2wnhotjlz4oudpsc5q4