Quantum Monte Carlo calculations of spectroscopic overlaps in $A \leq 7$ nuclei

TL;DR

This paper uses advanced Quantum Monte Carlo methods with realistic nuclear interactions to calculate spectroscopic overlaps, spectroscopic factors, and asymptotic normalization coefficients for nuclei with mass number up to 7, aiding low-energy nuclear reaction modeling.

Contribution

It introduces Green's function Monte Carlo calculations of spectroscopic overlaps for light nuclei using realistic interactions, providing data for reaction calculations.

Findings

Calculated spectroscopic overlaps for $A \,\leq\, 7$ nuclei.

Derived spectroscopic factors and asymptotic normalization coefficients.

Demonstrated the use of overlaps in low-energy reaction inputs.

Abstract

We present Green's function Monte Carlo calculations of spectroscopic overlaps for $A \leq 7$ nuclei. The realistic Argonne v18 two-nucleon and Illinois-7 three-nucleon interactions are used to generate the nuclear states. The overlap matrix elements are extrapolated from mixed estimates between variational Monte Carlo and Green's function Monte Carlo wave functions. The overlap functions are used to obtain spectroscopic factors and asymptotic normalization coefficients, and they can serve as an input for low-energy reaction calculations.