6 papers · 1 filter
Radial excitations and their potential impact on Fermi -decay rates
L. Xayavong, Y. Lim, N. A. Smirnova +1
We investigate the contribution of radial excitations to Fermi -decay matrix element. To this end, exact no-core shell model calculations are performed for the mirror decay…
Refining the isovector component of the Woods-Saxon potential
L. Xayavong, Y. Lim, N. A. Smirnova +1
We investigate the isovector component in the phenomenological mean field model of nuclei. Lane's isospin dependence, initially proposed for the nuclear optical potential, is reexa…
Understanding the mirror asymmetry in Gamow-Teller transition rates between Al()Si and P()Si
L. Xayavong, N. A. Smirnova, Y. Lim
The long-standing discrepancy between shell-model and experimental values of the mirror asymmetry in Gamow-Teller transition rates for Al()Si and P(…
Constraining theoretical Corrections to Gamow-Teller Transition Rates
L. Xayavong, Y. Lim
We propose two novel constraints for the theoretical corrections to Gamow-Teller transition rates. The first, derived from a two-level model, predicts forbidden regions within the…
Shell-Model Description of the Isospin-Symmetry-Breaking Correction to Gamow-Teller -Decay Rates and Their Mirror Asymmetries
Latsamy Xayavong, Yeunhwan Lim
The isospin-symmetry breaking correction, denoted as , is introduced for the first time within the shell-model framework to the nuclear matrix element of Gamow-Teller transiti…
Improved determination of the oscillator parameters in nuclei
Latsamy Xayavong, Yeunhwan Lim
The oscillator parameter in nuclei is refitted to reproduce the available charge radius data. As an important improvement, we include the Coulomb term evaluated within the assumpti…