Exploring the Onset of Collectivity Approaching N=40 through Manganese Masses

2025/02/25 by C. Chambers, Chambers, C., M. P. Reiter +51
Physics and Astronomy · #Astronomical and nuclear sciences #FOS: Physical sciences #Gamma-ray bursts and supernovae #Nuclear Experiment (nucl-ex) #Nuclear physics research studies

paper · pdf · doi:10.48550/arxiv.2502.18610

openalex publication_date 2025/02/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Isotopes in the region of the nuclear chart below ⁶⁸Ni have been the subject of intense experimental and theoretical effort due to the potential onset of a new ``island of inversion'' when crossing the harmonic oscillator subshell closure at N = 40. We have measured the masses of ^64-68\textrmMn using TITAN's multiple-reflection time-of-flight mass spectrometer, resulting in the first precision mass measurements of ⁶⁷Mn and ⁶⁸Mn. These results are compared to ab initio calculations and modern shell model calculations and show an increase in collectivity approaching N=40.

Related

• The land of deformation south of ⁶⁸Ni
• Low-energy structure of 61Mn populated following β decay of 61Cr
• Probing the quantum phase transition around N≈60 via mass measurements of technetium isotopes
• Precision mass measurements of ^74-76Sr using TITAN's Multiple-Reflection Time-of-Flight Mass Spectrometer
• Inference of weak nuclear collectivity from atomic masses