تقرير
Shell structure of potassium isotopes deduced from their magnetic moments
| العنوان: | Shell structure of potassium isotopes deduced from their magnetic moments |
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| المؤلفون: | Papuga, J., Bissell, M. L., Kreim, K., Barbieri, C., Blaum, K., De Rydt, M., Duguet, T., Ruiz, R. F. Garcia, Heylen, H., Kowalska, M., Neugart, R., Neyens, G., Nortershauser, W., Rajabali, M. M., Sanchez, R., Smirnova, N., Soma, V., Yordanov, D. T. |
| سنة النشر: | 2014 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | \item[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. \item[Purpose] Extend our knowledge about the evolution of the $1/2^+$ and $3/2^+$ states for K isotopes beyond the $N = 28$ shell gap. \item[Method] High-resolution collinear laser spectroscopy on bunched atomic beams. \item[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 $1d_{3/2}$ and $2s_{1/2}$ in the shell model and {\it{ab initio}} framework is also presented. \item[Conclusions] The dominant component of the wave function for the odd-$A$ isotopes up to $^{45}$K is a $\pi 1d_{3/2}^{-1}$ hole. For $^{47,49}$K, the main component originates from a $\pi 2s_{1/2}^{-1}$ hole configuration and it inverts back to the $\pi 1d_{3/2}^{-1}$ in $^{51}$K. For all even-$A$ isotopes, the dominant configuration arises from a $\pi 1d_{3/2}^{-1}$ hole coupled to a neutron in the $\nu 1f_{7/2}$ or $\nu 2p_{3/2}$ orbitals. Only for $^{48}$K, a significant amount of mixing with $\pi 2s_{1/2}^{-1} \otimes \nu (pf)$ is observed leading to a $I^{\pi}=1^{-}$ ground state. For $^{50}$K, the ground-state spin-parity is $0^-$ with leading configuration $\pi 1d_{3/2}^{-1} \otimes \nu 2p_{3/2}^{-1}$. Comment: 12 pages, 10 figures, 7 tables |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.90.034321 |
| URL الوصول: | http://arxiv.org/abs/1410.0895 |
| رقم الأكسشن: | edsarx.1410.0895 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.90.034321 |
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