Excited states in the neutron-rich nucleus 25F

TL;DR

This study explores the excited states of the neutron-rich nucleus 25F using in-beam gamma-ray spectroscopy, comparing experimental data with shell model and coupled-cluster calculations to understand its structure.

Contribution

It provides new experimental level schemes for 25F and compares them with theoretical models, enhancing understanding of neutron-rich nuclear structures.

Findings

Identification of multiple excited states in 25F.

Some states are quasi single-particle states on 24O.

Others result from proton coupling to 24O's 2+ excitation.

Abstract

The structure of the nucleus 25F was investigated through in-beam {\gamma}-ray spectroscopy of the fragmentation of 26Ne and 27,28Na ion beams. Based on the particle-{\gamma} and particle-{\gamma}{\gamma} coincidence data, a level scheme was constructed and compared with shell model and coupled-cluster calculations. Some of the observed states were interpreted as quasi single-particle states built on top of the closed-shell nucleus 24O, while the others were described as states arising from coupling of a single proton to the 2+ core excitation of 24O.