Nuclear ground-state spin and magnetic moment of 21Mg

J. Krämer; K. Blaum; M. De Rydt; K. T. Flanagan; Ch Geppert; M. Kowalska; P. Lievens; R. Neugart; G. Neyens; W. Nörtershäuser; H. H. Stroke; P. Vingerhoets; D. T. Yordanov

doi:10.1016/j.physletb.2009.06.063

Nuclear ground-state spin and magnetic moment of ²¹Mg

J. Krämer, K. Blaum, M. De Rydt, K. T. Flanagan, Ch Geppert, M. Kowalska, P. Lievens, R. Neugart, G. Neyens, W. Nörtershäuser, H. H. Stroke, P. Vingerhoets, D. T. Yordanov

Research output: Contribution to journal › Article › peer-review

Abstract

We present the results of combined laser spectroscopy and nuclear magnetic resonance studies of ²¹Mg. The nuclear ground-state spin was measured to be I = 5 / 2 with a magnetic moment of μ = - 0.983 (7) μ_N. The isoscalar magnetic moment of the mirror pair (²¹F, ²¹Mg) is evaluated and compared to the extreme single-particle prediction and to nuclear shell-model calculations. We determine an isoscalar spin expectation value of 〈 σ 〉 = 1.15 (2), which is significantly greater than the empirical limit of unity given by the Schmidt values of the magnetic moments. Shell-model calculations taking into account isospin non-conserving effects, are in agreement with our experimental results.

Original language	English (US)
Pages (from-to)	465-469
Number of pages	5
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	678
Issue number	5
DOIs	https://doi.org/10.1016/j.physletb.2009.06.063
State	Published - Aug 3 2009

Keywords

Hyperfine structure
Laser spectroscopy
NMR
Nuclear magnetic moment

ASJC Scopus subject areas

Nuclear and High Energy Physics

Access to Document

10.1016/j.physletb.2009.06.063

Cite this

Krämer, J., Blaum, K., De Rydt, M., Flanagan, K. T., Geppert, C., Kowalska, M., Lievens, P., Neugart, R., Neyens, G., Nörtershäuser, W., Stroke, H. H., Vingerhoets, P., & Yordanov, D. T. (2009). Nuclear ground-state spin and magnetic moment of ²¹Mg. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 678(5), 465-469. https://doi.org/10.1016/j.physletb.2009.06.063

Krämer, J, Blaum, K, De Rydt, M, Flanagan, KT, Geppert, C, Kowalska, M, Lievens, P, Neugart, R, Neyens, G, Nörtershäuser, W, Stroke, HH, Vingerhoets, P & Yordanov, DT 2009, 'Nuclear ground-state spin and magnetic moment of ²¹Mg', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 678, no. 5, pp. 465-469. https://doi.org/10.1016/j.physletb.2009.06.063

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title = "Nuclear ground-state spin and magnetic moment of 21Mg",

abstract = "We present the results of combined laser spectroscopy and nuclear magnetic resonance studies of 21Mg. The nuclear ground-state spin was measured to be I = 5 / 2 with a magnetic moment of μ = - 0.983 (7) μN. The isoscalar magnetic moment of the mirror pair (21F, 21Mg) is evaluated and compared to the extreme single-particle prediction and to nuclear shell-model calculations. We determine an isoscalar spin expectation value of 〈 σ 〉 = 1.15 (2), which is significantly greater than the empirical limit of unity given by the Schmidt values of the magnetic moments. Shell-model calculations taking into account isospin non-conserving effects, are in agreement with our experimental results.",

keywords = "Hyperfine structure, Laser spectroscopy, NMR, Nuclear magnetic moment",

author = "J. Kr{\"a}mer and K. Blaum and {De Rydt}, M. and Flanagan, {K. T.} and Ch Geppert and M. Kowalska and P. Lievens and R. Neugart and G. Neyens and W. N{\"o}rtersh{\"a}user and Stroke, {H. H.} and P. Vingerhoets and Yordanov, {D. T.}",

note = "Funding Information: This work was supported by: German Federal Ministry for Education and Research BMBF (06 MZ 215 and 06 MZ 175), Helmholtz Association of German Research Centres (VH-NG-037 and VH-NG-148), EU FP6 MEIF-CT-2006-042114 and EURONS Project No. RII3-CT-2004-506065, the IUAP Project No. P5/07 of OSCT Belgium and the FWO-Vlaanderen. We would like to thank the ISOLDE technical group for their professional assistance.",

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doi = "10.1016/j.physletb.2009.06.063",

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AU - Krämer, J.

AU - Blaum, K.

AU - De Rydt, M.

AU - Flanagan, K. T.

AU - Geppert, Ch

AU - Kowalska, M.

AU - Lievens, P.

AU - Neugart, R.

AU - Neyens, G.

AU - Nörtershäuser, W.

AU - Stroke, H. H.

AU - Vingerhoets, P.

AU - Yordanov, D. T.

N1 - Funding Information: This work was supported by: German Federal Ministry for Education and Research BMBF (06 MZ 215 and 06 MZ 175), Helmholtz Association of German Research Centres (VH-NG-037 and VH-NG-148), EU FP6 MEIF-CT-2006-042114 and EURONS Project No. RII3-CT-2004-506065, the IUAP Project No. P5/07 of OSCT Belgium and the FWO-Vlaanderen. We would like to thank the ISOLDE technical group for their professional assistance.

PY - 2009/8/3

Y1 - 2009/8/3

N2 - We present the results of combined laser spectroscopy and nuclear magnetic resonance studies of 21Mg. The nuclear ground-state spin was measured to be I = 5 / 2 with a magnetic moment of μ = - 0.983 (7) μN. The isoscalar magnetic moment of the mirror pair (21F, 21Mg) is evaluated and compared to the extreme single-particle prediction and to nuclear shell-model calculations. We determine an isoscalar spin expectation value of 〈 σ 〉 = 1.15 (2), which is significantly greater than the empirical limit of unity given by the Schmidt values of the magnetic moments. Shell-model calculations taking into account isospin non-conserving effects, are in agreement with our experimental results.

AB - We present the results of combined laser spectroscopy and nuclear magnetic resonance studies of 21Mg. The nuclear ground-state spin was measured to be I = 5 / 2 with a magnetic moment of μ = - 0.983 (7) μN. The isoscalar magnetic moment of the mirror pair (21F, 21Mg) is evaluated and compared to the extreme single-particle prediction and to nuclear shell-model calculations. We determine an isoscalar spin expectation value of 〈 σ 〉 = 1.15 (2), which is significantly greater than the empirical limit of unity given by the Schmidt values of the magnetic moments. Shell-model calculations taking into account isospin non-conserving effects, are in agreement with our experimental results.

KW - Hyperfine structure

KW - Laser spectroscopy

KW - NMR

KW - Nuclear magnetic moment

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