Gamow-Teller strengths in 24Na using the 24Mg(t,3He) reaction at 115 AMeV

TL;DR

This study investigates Gamow-Teller transitions in 24Na via the (t,3He) reaction at 115 AMeV, achieving high resolution and improved beam intensity, and compares results with theoretical models and previous experiments.

Contribution

It presents new experimental data on Gamow-Teller strengths using a secondary triton beam with enhanced intensity and resolution, and validates sd-shell model calculations against the measurements.

Findings

Good agreement between experimental data and theoretical models.

Enhanced secondary beam intensity improves experimental capabilities.

High excitation-energy resolution of ~200 keV achieved.

Abstract

Gamow-Teller transitions from 24Mg to 24Na were studied via the (t,3He) reaction at 115 AMeV using a secondary triton beam produced via fast fragmentation of 150 AMeV 16O ions. Compared to previous (t,3He) experiments at this energy that employed a primary alpha beam, the secondary beam intensity is improved by about a factor of five. Despite the large emittance of the secondary beam, an excitation-energy resolution of ~200 keV is achieved. A good correspondence is found between the extracted Gamow-Teller strength distribution and those available from other charge-exchange probes. Theoretical calculations using the newly developed USDA and USDB sd-shell model interactions reproduce the data well.