(N=82)壳层闭附近铥同位素的激光光谱:${}^{152\mathrm{m}}\mathrm{Tm}$的核磁矩和电荷半径
Laser Spectroscopy of Thulium Isotopes Near the $N=82$ Shell Closure: Nuclear Moment and Charge Radius of ${}^{152\mathrm{m}}\mathrm{Tm}$
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中文总结 AI 辅助
对铥同位素进行共振电离激光光谱测量,测定特定波长跃迁的同位素位移,部分分辨超精细结构,确定${}^{152\mathrm{m}}\mathrm{Tm}$的核磁偶极矩,提取其均方核电荷半径变化。
中文摘要 AI 辅助
我们报告了对缺中子和富中子铥($\mathrm{Tm}, Z=69$)同位素进行的共振电离激光光谱测量。测定了${}^{152\mathrm{m}}\mathrm{Tm}$、${}^{153}\mathrm{Tm}$、${}^{154\mathrm{m}}\mathrm{Tm}$和${}^{169}\mathrm{Tm}$同位素在波长389.8nm、388.4nm和388.8nm处三个原子基态跃迁的同位素位移。此外,对于389.8nm跃迁,测量扩展到${}^{170}\mathrm{Tm}$同位素,并部分分辨了所有五种同位素的超精细结构。从提取的超精细耦合常数确定了${}^{152\mathrm{m}}\mathrm{Tm}$的核磁偶极矩$\mu\left({}^{152\mathrm{m}}\mathrm{Tm}\right) = 5.8(3)\,\mu_\mathrm{N}$。此外,测量的同位素位移使得能够提取${}^{152\mathrm{m}}\mathrm{Tm}$的均方核电荷半径变化$\delta\langle r^2\rangle^{152\mathrm{m},169} = -1.86(25)\,\mathrm{fm}^2$。
英文摘要
We report on resonance ionization laser spectroscopy measurements performed on both neutron-deficient and neutron-rich thulium ($\mathrm{Tm}, Z=69$) isotopes. Isotope shifts were determined for three atomic ground-state transitions at wavelengths of $389.8\,\mathrm{nm}$, $388.4\,\mathrm{nm}$, and $388.8\,\mathrm{nm}$ in the isotopes ${}^{152\mathrm{m}}\mathrm{Tm}$, ${}^{153}\mathrm{Tm}$, ${}^{154\mathrm{m}}\mathrm{Tm}$, and ${}^{169}\mathrm{Tm}$. In addition, for the $389.8\,\mathrm{nm}$ transition, measurements were extended to the isotope ${}^{170}\mathrm{Tm}$, and the hyperfine structure was partially resolved for all five isotopes. For this transition, the isotope shift could be determined for one more isotope, ${}^{154\mathrm{m}}\mathrm{Tm}$. From the extracted hyperfine coupling constants, the nuclear magnetic dipole moment for ${}^{152\mathrm{m}}\mathrm{Tm}$ was determined for the first time, resulting in $μ\left({}^{152\mathrm{m}}\mathrm{Tm}\right) = 5.8(3) μ_\mathrm{N}$. Furthermore, the mean-square nuclear charge radius $δ\langle r^2\rangle^{152\mathrm{m},169} = -1.87(17)\,\mathrm{fm}^2$ for ${}^{152\mathrm{m}}\mathrm{Tm}$ was extracted from the measured isotope shifts.
发表机构
- GSI Helmholtzzentrum für Schwerionenforschung GmbH(GSI亥姆霍兹重离子研究中心有限公司)
- Helmholtz-Institut Mainz(美因茨亥姆霍兹研究所)
- Johannes Gutenberg-Universität Mainz(约翰内斯·古腾堡大学美因茨分校)
- Technische Universität Darmstadt(达姆施塔特工业大学)
- KU Leuven(鲁汶大学)
- Grand Accelerateur National d’Ions Lourds(法国国家大型重离子加速器研究所)
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