Gamow-Teller transitions from $^{9,11}$Li to $^{9,11}$Be

TL;DR

This paper uses antisymmetrized molecular dynamics to calculate Gamow-Teller transition strengths in the beta decay of lithium isotopes, revealing small low-lying transition probabilities but significant strengths at higher excitation energies, with some discrepancies from experimental data.

Contribution

It provides a theoretical analysis of GT transitions in lithium isotopes, highlighting the energy dependence of transition strengths and comparing with experimental results.

Findings

Small B(GT) values for low-lying states

Large B(GT) values for excited states above 10 MeV

Inconsistency with experimental strongest transition report

Abstract

Gamow-Teller(GT) transitions in the $\beta$ decays of $^9$Li and $^{11}$Li are investigated with theoretical calculations of antisymmetrized molecular dynamics. The calculated $B(GT)$ values are small for transitions to low-lying states in Be isotopes, while relatively large $B(GT)$ values are found for excited states at excitation energy $E_x\ge 10$ MeV. Sum of the $B(GT)$ values are discussed for each spin parity of final states. The calculated results seem to be inconsistent with the experimental report of the strongest GT-transition from $^9$Li to the $5/2^-$ state at 11.8 MeV of $^9$Be.