TRIUMF, Vancouver, British Columbia, Canada.
Phys Rev Lett. 2011 Nov 18;107(21):212502. doi: 10.1103/PhysRevLett.107.212502.
Collinear-laser spectroscopy with the bunched-beams technique was used for the study of neutron deficient Rb isotopes, out to (74)Rb (N = Z = 37) at TRIUMF. The measured hyperfine coupling constants of (76,78m)Rb were in agreement with literature values. The nuclear spin of (75)Rb was confirmed to be I = 3/2, and its hyperfine coupling constants were measured for the first time. The mean-square charge radius of (74)Rb was determined for the first time. This result has improved the isospin symmetry breaking correction term used to calculate the Ft value, with implications for tests of the unitarity of the Cabibbo-Kobayashi-Maskawa matrix.
使用聚束束激光光谱学技术，在 TRIUMF 对中子缺乏的铷同位素（74）Rb（N = Z = 37）进行了研究。测量到的（76，78m）Rb 的超精细耦合常数与文献值一致。（75）Rb 的核自旋被确认为 I = 3/2，并首次测量了其超精细耦合常数。（74）Rb 的均方电荷半径也首次被确定。这一结果改进了用于计算 Ft 值的同位旋破坏修正项，对卡比博-小林-益川矩阵的幺正性检验具有重要意义。
