$\alpha$-cluster structures above double shell closures via double-folding potentials from chiral effective field theory

Abstract

$\alpha$-cluster structures above double shell closures are among the cornerstones for nuclear $\alpha$-cluster physics. Semi-microscopic cluster models (SMCMs) are important theoretical models to study their properties. A crucial ingredient of SMCM is the effective potential between the alpha cluster and the doubly magic nucleus. We derive new double-folding potentials between $\alpha$ clusters and doubly magic nuclei from soft local chiral nucleon-nucleon potentials given by chiral effective field theory ($\chi$EFT) at the next-to-next-to-leading order. The $\alpha$-cluster structures in ${}^8\text{Be}$, ${}^{20}\text{Ne}$, ${}^{44,52}\text{Ti}$, and ${}^{212}\text{Po}$ are explored to validate these new double-folding potentials. The $\alpha$ decay of ${}^{104}\text{Te}$ is also studied in the light of recent experimental results. Our study shows that double-folding potentials from $\chi$EFT are the new reliable effective potentials for the SMCM approach to $\alpha$-cluster structures above double shell closures, with both conceptual and phenomenological merits.

9 pages, 2 figures; accepted by Physical Review C

References in corpus (13)

• Chiral effective field theory and nuclear forces
• Local chiral effective field theory interactions and quantum Monte Carlo applications
• Super-allowed alpha-decay above doubly-magic 100Sn and properties of 104Te = 100Sn otimes alpha
• Alpha Decay to Doubly Magic Core in Quartetting Wave Function Approach
• Quantum Monte Carlo calculations of electromagnetic transitions in 8Be with meson-exchange currents derived from chiral effective field theory
• Half-lives of $\alpha$ decay from natural nuclides and from superheavy elements
• Alpha Clustering from the Quartet Model
• $\alpha$-cluster structure above double-shell closures and $\alpha$-decay of ${}^{104}$Te
• $\alpha$ cluster states in ${}^{44,46,52}$Ti
• Dispersion relations applied to double-folding potentials from chiral EFT
• Existence of higher nodal band states with $\alpha$+${}^{48}$Ca cluster structure in ${}^{52}$Ti
• Unified description of pairing and quarteting correlations within the particle-hole-boson approach
• Yrast band in the heavy $N=Z$ nucleus ${}^{88}$Ru: $\alpha$-cluster approach

Cited by in corpus (3)

• Search for the $\alpha$ + core structure in the ground state bands of $22\le Z\le 42$ even-even nuclei
• Alpha decay of thermally excited nuclei
• $\alpha$ + core structure described with an additional interaction in the nuclear matter saturation region