Measurement of diffusion coefficients of francium and rubidium in yttrium based on laser spectroscopy
Measurement of diffusion coefficients of francium and rubidium in yttrium based on laser spectroscopy
复制标题
基于激光光谱法测量钇和铷在钇中的扩散系数
DOI：
10.1103/physreva.78.063415
复制
发表时间：
2008
影响因子：
2.9
通讯作者：
Stefano Veronesi
中科院分区：
文献类型：
--
作者：
C. D. Mauro;R. Calabrese;L. Corradi;A. Dainelli;A. Khanbekyan;E. Mariotti;P. Minguzzi;Luigi Moi;S. Sanguinetti;G. Stancari;L. Tomassetti;Stefano Veronesi
We report the measurement of the diffusion coefficients of francium and rubidium ions implanted in a yttrium foil. We developed a methodology, based on laser spectroscopy, which can be applied to radioactive and stable species, and allows us to directly take record of the diffusion time. Francium isotopes are produced via fusion-evaporation nuclear reaction of a $^{18}\mathrm{O}$ beam on a Au target at the Tandem XTU accelerator facility in Legnaro, Italy. Francium is ionized at the gold-vacuum interface and ${\mathrm{Fr}}^{+}$ ions are then transported with an electrostatic beamline to a cell for neutralization and capture in a magneto-optical trap (MOT). A ${\mathrm{Rb}}^{+}$ beam is also available, which follows the same path as ${\mathrm{Fr}}^{+}$ ions. The accelerated ions are focused and implanted in an yttrium foil for neutralization. The time evolution of the MOT and the vapor fluorescence signals are used to determine diffusion times of Fr and Rb in Y as a function of temperature.
We report the measurement of the diffusion coefficients of francium and rubidium ions implanted in a yttrium foil. We developed a methodology, based on laser spectroscopy, which can be applied to radioactive and stable species, and allows us to directly take record of the diffusion time. Francium isotopes are produced via fusion-evaporation nuclear reaction of a $^{18}\mathrm{O}$ beam on a Au target at the Tandem XTU accelerator facility in Legnaro, Italy. Francium is ionized at the gold-vacuum interface and ${\mathrm{Fr}}^{+}$ ions are then transported with an electrostatic beamline to a cell for neutralization and capture in a magneto-optical trap (MOT). A ${\mathrm{Rb}}^{+}$ beam is also available, which follows the same path as ${\mathrm{Fr}}^{+}$ ions. The accelerated ions are focused and implanted in an yttrium foil for neutralization. The time evolution of the MOT and the vapor fluorescence signals are used to determine diffusion times of Fr and Rb in Y as a function of temperature.