Beta-decay half-lives and beta-delayed neutron emission probabilities of nuclei in the region below A=110, relevant for the r-process

TL;DR

This paper reports new measurements of beta-decay half-lives and neutron emission probabilities for nuclei below A=110, providing data crucial for understanding the r-process in nucleosynthesis.

Contribution

It presents the first measurements of specific beta-decay properties of several nuclei in the A<110 region, enhancing nuclear data for astrophysical models.

Findings

Beta-decay half-lives for Y-105, Zr-106,107, Mo-111 measured.

Beta-delayed neutron emission probabilities for Y-104, Mo-109,110 determined.

Ground-state deformation analyzed using quasi-random phase approximation.

Abstract

Measurements of the beta-decay properties of r-process nuclei below A=110 have been completed at the National Superconducting Cyclotron Laboratory, at Michigan State University. Beta-decay half-lives for Y-105, Zr-106,107 and Mo-111, along with beta-delayed neutron emission probabilities of Y-104, Mo-109,110 and upper limits for Y-105, Zr-103,104,105,106,107 and Mo-108,111 have been measured for the first time. Studies on the basis of the quasi-random phase approximation are used to analyze the ground-state deformation of these nuclei.