通过高电荷类钠离子的极紫外光谱法测量氙同位素的核电荷半径差异。
Measuring the difference in nuclear charge radius of Xe isotopes by EUV spectroscopy of highly charged Na-like ions.
作者信息
Silwal R, Lapierre A, Gillaspy J D, Dreiling J M, Blundell S A, Borovik A, Gwinner G, Villari A C C, Ralchenko Yu, Takacs E
机构信息
Department of Physics and Astronomy, Clemson University, Clemson, South Carolina 29634, USA.
National Institute of Standards and Technology (NIST), Gaithersburg, Maryland 20899, USA.
出版信息
Phys Rev A (Coll Park). 2018;98. doi: 10.1103/PhysRevA.98.052502.
The difference in the mean-square nuclear charge radius of xenon isotopes was measured utilizing a method based on extreme ultraviolet spectroscopy of highly charged Na-like ions. The isotope shift of the Na-like 1 (3 - 3 ) transition between the Xe and Xe isotopes was experimentally determined using the electron-beam ion-trap facility at the National Institute of Standards and Technology. The mass-shift and the field-shift coefficients were calculated with enhanced precision by the relativistic many-body perturbation theory and multiconfiguration Dirac-Hartree-Fock method. The mean-square nuclear charge radius difference was found to be 〈 〉 = 0.269(42) fm. Our result has smaller uncertainty than previous experimental results and agrees with the literature values.
利用基于高电荷类钠离子极紫外光谱的方法，测量了氙同位素均方核电荷半径的差异。使用美国国家标准与技术研究院的电子束离子阱装置，通过实验确定了类钠Xe和Xe同位素之间1(3 - 3)跃迁的同位素位移。采用相对论多体微扰理论和多组态狄拉克-哈特里-福克方法，以更高的精度计算了质量位移和场位移系数。发现均方核电荷半径差为〈〉 = 0.269(42) fm。我们的结果比以前的实验结果具有更小的不确定性，并且与文献值一致。
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