A1 Journal article (refereed)
Proton-neutron pairing correlations in the self-conjugate nucleus 42Sc (2021)

Koszorús, Á., Vormawah, L.J., Beerwerth, R., Bissell, M.L., Campbell, P., Cheal, B., Devlin, C.S., Eronen, T., Fritzsche, S., Geldhof, S., Heylen, H., Holt, J.D., Jokinen, A., Kelly, S., Moore, I.D., Miyagi, T., Rinta-Antila, S., Voss, A., & Wraith, C. (2021). Proton-neutron pairing correlations in the self-conjugate nucleus 42Sc. Physics Letters B, 819, Article 136439. https://doi.org/10.1016/j.physletb.2021.136439

JYU authors or editors

Publication details

All authors or editors: Koszorús, Á.; Vormawah, L.J.; Beerwerth, R.; Bissell, M.L.; Campbell, P.; Cheal, B.; Devlin, C.S.; Eronen, T.; Fritzsche, S.; Geldhof, S.; et al.

Journal or series: Physics Letters B

ISSN: 0370-2693

eISSN: 1873-2445

Publication year: 2021

Volume: 819

Article number: 136439

Publisher: Elsevier

Publication country: Netherlands

Publication language: English

DOI: https://doi.org/10.1016/j.physletb.2021.136439

Publication open access: Openly available

Publication channel open access: Open Access channel

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/76648

Web address of parallel published publication (pre-print): https://arxiv.org/abs/2102.01988

Abstract

Collinear laser spectroscopy of the N=Z=21 self-conjugate nucleus 42Sc has been performed at the JYFL IGISOL IV facility in order to determine the change in nuclear mean-square charge radius between the Iπ=0+ ground state and the Iπ=7+ isomer via the measurement of the 42g,42mSc isomer shift. New multi-configurational Dirac-Fock calculations for the atomic mass shift and field shift factors have enabled a recalibration of the charge radii of the 42−46Sc isotopes which were measured previously. While consistent with the treatment of proton-neutron, proton-proton and neutron-neutron pairing on an equal footing, the reduction in size for the isomer is observed to be of a significantly larger magnitude than that expected from both shell-model and ab-initio calculations. The measured nuclear magnetic dipole moment and electric quadruple moment, on the other hand, are in good agreement with simple empirical estimates and shell-model calculations.

Keywords: nuclear physics; spectroscopy; scandium; isotopes

Free keywords: collinear laser spectroscopy; hyperfine structure and isotope shift; proton-neutron pairing; charge radius

Contributing organizations

Ministry reporting: Yes

VIRTA submission year: 2021

JUFO rating: 2