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Shell structure of potassium isotopes deduced from their magnetic moments

Papuga, J, Bissell, ML, De Rydt, M, Garcia Ruiz, RF, Heylen, H, Neyens, G, Rajabali, MM, Kreim, K, Blaum, K, Yordanov, DT , Barbieri, C, Duguet, T, Somà, V, Kowalska, M, Neugart, R, Nörtershäuser, W, Sánchez, R and Smirnova, N (2014) Shell structure of potassium isotopes deduced from their magnetic moments Physical Review C - Nuclear Physics, 90 (3).

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Abstract

Background: Ground-state spins and magnetic moments are sensitive to the nuclear wave function, thus they are powerful probes to study the nuclear structure of isotopes far from stability. Purpose: Extend our knowledge about the evolution of the 1/2+ and 3/2+ states for K isotopes beyond the N=28 shell gap. Method: High-resolution collinear laser spectroscopy on bunched atomic beams. Results: From measured hyperfine structure spectra of K isotopes, nuclear spins, and magnetic moments of the ground states were obtained for isotopes from N=19 up to N=32. In order to draw conclusions about the composition of the wave functions and the occupation of the levels, the experimental data were compared to shell-model calculations using SDPF-NR and SDPF-U effective interactions. In addition, a detailed discussion about the evolution of the gap between proton 1d3/2 and 2s1/2 in the shell model and ab initio framework is also presented. Conclusions: The dominant component of the wave function for the odd-A isotopes up to K45 is a π1d3/2-1 hole. For K47,49, the main component originates from a π2s1/2-1 hole configuration and it inverts back to the π1d3/2-1 in K51. For all even-A isotopes, the dominant configuration arises from a π1d3/2-1 hole coupled to a neutron in the ν1f7/2 or ν2p3/2 orbitals. Only for K48, a significant amount of mixing with π2s1/2-1 - ν(pf) is observed leading to a Iπ=1- ground state. For K50, the ground-state spin-parity is 0- with leading configuration π1d3/2-1 - ν2p3/2-1.

Item Type: Article
Authors :
NameEmailORCID
Papuga, JUNSPECIFIEDUNSPECIFIED
Bissell, MLUNSPECIFIEDUNSPECIFIED
De Rydt, MUNSPECIFIEDUNSPECIFIED
Garcia Ruiz, RFUNSPECIFIEDUNSPECIFIED
Heylen, HUNSPECIFIEDUNSPECIFIED
Neyens, GUNSPECIFIEDUNSPECIFIED
Rajabali, MMUNSPECIFIEDUNSPECIFIED
Kreim, KUNSPECIFIEDUNSPECIFIED
Blaum, KUNSPECIFIEDUNSPECIFIED
Yordanov, DTUNSPECIFIEDUNSPECIFIED
Barbieri, CUNSPECIFIEDUNSPECIFIED
Duguet, TUNSPECIFIEDUNSPECIFIED
Somà, VUNSPECIFIEDUNSPECIFIED
Kowalska, MUNSPECIFIEDUNSPECIFIED
Neugart, RUNSPECIFIEDUNSPECIFIED
Nörtershäuser, WUNSPECIFIEDUNSPECIFIED
Sánchez, RUNSPECIFIEDUNSPECIFIED
Smirnova, NUNSPECIFIEDUNSPECIFIED
Date : 29 September 2014
Identification Number : 10.1103/PhysRevC.90.034321
Additional Information : Copyright 2014 American Physical Society.
Depositing User : Symplectic Elements
Date Deposited : 28 Mar 2017 10:51
Last Modified : 31 Oct 2017 17:14
URI: http://epubs.surrey.ac.uk/id/eprint/806894

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