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

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Heylen , H , Babcock , C , Beerwerth , R , Billowes , J , Bissell , M L , Blaum , K , Bonnard , J , Campbell , P , Cheal , B , Goodacre , T D , Fedorov , D , Fritzsche , S , Ruiz , R F G , Geithner , W , Geppert , C , Gins , W , Grob , L K , Kowalska , M , Kreim , K , Lenzi , S M , Moore , I D , Maass , B , Malbrunot-Ettenauer , S , Marsh , B , Neugart , R , Neyens , G , Noertershaeuser , W , Otsuka , T , Papuga , J , Rossel , R , Rothe , S , Sanchez , R , Tsunoda , Y , Wraith , C , Xie , L , Yang , X F & Yordanov , D T 2016 , ' Changes in nuclear structure along the Mn isotopic chain studied via charge radii ' , Physical Review C , vol. 94 , no. 5 , 054321 . https://doi.org/10.1103/PhysRevC.94.054321

Title: Changes in nuclear structure along the Mn isotopic chain studied via charge radii
Author: Heylen, H.; Babcock, C.; Beerwerth, R.; Billowes, J.; Bissell, M. L.; Blaum, K.; Bonnard, J.; Campbell, P.; Cheal, B.; Goodacre, T. Day; Fedorov, D.; Fritzsche, S.; Ruiz, R. F. Garcia; Geithner, W.; Geppert, Ch.; Gins, W.; Grob, L. K.; Kowalska, M.; Kreim, K.; Lenzi, S. M.; Moore, I. D.; Maass, B.; Malbrunot-Ettenauer, S.; Marsh, B.; Neugart, R.; Neyens, G.; Noertershaeuser, W.; Otsuka, T.; Papuga, J.; Rossel, R.; Rothe, S.; Sanchez, R.; Tsunoda, Y.; Wraith, C.; Xie, L.; Yang, X. F.; Yordanov, D. T.
Contributor: University of Helsinki, Helsinki Institute of Physics
Date: 2016-11-28
Language: eng
Number of pages: 11
Belongs to series: Physical Review C
ISSN: 2469-9985
URI: http://hdl.handle.net/10138/174102
Abstract: The hyperfine spectra of Mn-51,Mn-53-64 were measured in two experimental runs using collinear laser spectroscopy at ISOLDE, CERN. Laser spectroscopy was performed on the atomic 3d(5) 4s(2) S-6(5/2)-> 3d(5) 4s4p P-6(3/2) and ionic 3d(5) 4s S-5(2)-> 3d(5) 4p P-5(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.
Subject: LASER SPECTROSCOPY
SHELL-MODEL
QUADRUPOLE-MOMENTS
CALCIUM ISOTOPES
N=28
NEUTRON
PROGRAM
SHIFTS
114 Physical sciences
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