铷原子共振电离光谱学研究。
Collinear resonance ionization spectroscopy of neutron-deficient francium isotopes.
机构信息
School of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom.
出版信息
Phys Rev Lett. 2013 Nov 22;111(21):212501. doi: 10.1103/PhysRevLett.111.212501. Epub 2013 Nov 19.
The magnetic moments and isotope shifts of the neutron-deficient francium isotopes (202-205)Fr were measured at ISOLDE-CERN with use of collinear resonance ionization spectroscopy. A production-to-detection efficiency of 1% was measured for (202)Fr. The background from nonresonant and collisional ionization was maintained below one ion in 10(5) beam particles. Through a comparison of the measured charge radii with predictions from the spherical droplet model, it is concluded that the ground-state wave function remains spherical down to (205)Fr, with a departure observed in (203)Fr (N=116).
利用共线共振电离光谱法，在 CERN 的 ISOLDE 上测量了中子亏损的钫同位素（202-205）Fr 的磁矩和同位素位移。测量到（202）Fr 的生产到检测效率为 1%。非共振和碰撞电离的背景保持在每 10（5）束粒子中有一个离子以下。通过将测量的电荷半径与球形液滴模型的预测进行比较，可以得出结论，直到（205）Fr，基态波函数仍然保持球形，而在（203）Fr（N=116）中观察到偏离。
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