Changes in nuclear structure along the Mn isotopic chain studied via charge radii

Heylen, H, Babcock, C, Beerwerth, R, Billowes, J, Bissell, ML, Blaum, K, Bonnard, J, Campbell, P, Cheal, B, Goodacre, T Day
et al (show 27 more authors) (2016) Changes in nuclear structure along the Mn isotopic chain studied via charge radii. PHYSICAL REVIEW C, 94 (5). 054321-.

[img] Text
heylen16a.pdf - Published version

Download (1MB)


The hyperfine spectra of $^{51,53-64}$Mn were measured in two experimental runs using collinear laser spectroscopy at ISOLDE, CERN. Laser spectroscopy was performed on the atomic $3d^5\ 4s^2\ ^{6}\text{S}_{5/2}\rightarrow 3d^5\ 4s4p\ ^{6}\text{P}_{3/2}$ and ionic $3d^5\ 4s\ ^{5}\text{S}_2 \rightarrow 3d^5\ 4p\ ^{5}\text{P}_3$ transitions, yielding two sets of isotope shifts. The mass and field shift factors for both transitions have been calculated in the multiconfiguration Dirac-Fock framework and were combined with a King plot analysis in order to obtain a consistent set of mean-square charge radii which, together with earlier work on neutron-deficient Mn, allow the study of nuclear structure changes from $N=25$ across $N=28$ up to $N=39$. A clear development of deformation is observed towards $N=40$, confirming the conclusions of the nuclear moments studies. From a Monte Carlo Shell Model study of the shape in the Mn isotopic chain, it is suggested that the observed development of deformation is not only due to an increase in static prolate deformation but also due to shape fluctuations and triaxiality. The changes in mean-square charge radii are well reproduced using the Duflo-Zuker formula except in the case of large deformation.

Item Type: Article
Additional Information: 9 figures, submitted to PRC
Uncontrolled Keywords: nucl-ex, nucl-ex
Depositing User: Symplectic Admin
Date Deposited: 24 May 2018 09:43
Last Modified: 19 Jan 2023 01:33
DOI: 10.1103/PhysRevC.94.054321
Related URLs: