$\alpha$ + core structure described with an additional interaction in the nuclear matter saturation region

Abstract

In a phenomenological approach, the $\alpha$ + core structure is investigated in the ${}^{20}$Ne, ${}^{44}$Ti, ${}^{94}$Mo, ${}^{104}$Te, and ${}^{212}$Po nuclei through the local potential model using a double-folding nuclear potential with effective nucleon-nucleon interaction of M3Y + $c_{\mathrm{sat}}\delta (s)$ type, where the term $c_{\mathrm{sat}}\delta (s)$ acts only between the saturation regions of $\alpha$-cluster and core. Properties such as energy levels, $\alpha$-widths, $B(E2)$ transition rates, and half-lives are calculated, and good level of agreement with experimental data is obtained in general. It is shown the inclusion of the term $c_{\mathrm{sat}}\delta (s)$ is determinant for a better description of the experimental energy levels compared to the ground state bands produced with the simple M3Y interaction. The properties calculated for ${}^{104}$Te reinforce the superallowed $\alpha$-decay feature for this nucleus, as indicated in previous studies.

13 pages, 6 figures. Accepted for publication in The European Physical Journal A

References in corpus (5)

• Super-allowed alpha-decay above doubly-magic 100Sn and properties of 104Te = 100Sn otimes alpha
• Alpha-cluster structure in even-even nuclei around ${}^{94}$Mo
• $\alpha$-cluster structure above double-shell closures and $\alpha$-decay of ${}^{104}$Te
• $\alpha$-cluster states in ${}^{46,54}$Cr from double-folding potentials
• alpha-cluster states in intermediate mass nuclei