Isotope shifts and nuclear charge radii of krypton isotopes across the N=50 shell closure.
Isotope shifts and nuclear charge radii of krypton isotopes across the N=50 shell closure.
复制标题
N=50 壳层封闭区域内氪同位素的同位素位移和核电荷半径。
DOI：
10.1103/physrevlett.65.1332
复制
发表时间：
1990
影响因子：
8.6
通讯作者：
Li
中科院分区：
文献类型：
--
作者：
Schuessler;Alousi;Evans;Brieger;Buchinger;Li
利用共线快束激光光谱技术，在原子氪（λ = 760 nm）的5s(3/2)₂⁰ - 5p(3/2)₂跃迁中测量了光学同位素位移。确定了短寿命富中子同位素⁸⁸Kr和⁹⁰Kr以及A = 78到86之间所有稳定同位素的同位素位移，从而首次将该元素的数据扩展到N = 50壳层闭合之外。推导出的核电荷半径变化表明，在N = 50以下，电荷半径随中子数增加而减小，在N = 50以上则增加得快得多。根据液滴模型对结果进行了初步解释。
Optical isotope shifts have been measured in the 5{ital s}(3/2){sub 2}{sup 0}--5{ital p}(3/2){sub 2} transition in atomic krypton ({lambda}=760 nm) using collinear-fast-beam laser spectroscopy. Isotope shifts were determined for the short-lived neutron-rich isotopes {sup 88}Kr and {sup 90}Kr, as well as for all the stable isotopes between {ital A}=78 and 86, thus extending the data in this element, for the first time, beyond the {ital N}=50 shell closure. The deduced changes in the nuclear charge radii show a decrease of the charge radius with increasing neutron number below {ital N}=50, and a much more rapid increase above it. A preliminary interpretation of the results is given in terms of the droplet model.