منابع مشابه
Spectroscopy with Trapped Francium
These notes present a review of the francium experiments at Stony Brook. The measurements show that the level of quantitative understanding of the atomic structure is sufficient to pursue experiments in atomic parity non-conservation.
متن کاملIsotope Shifts in Francium Isotopes
We present the isotope shifts of the 7s1/2 to 7p1/2 transition for francium isotopes 206−213Fr with reference to 221Fr collected from two experimental periods. The shifts are measured on a sample of atoms prepared within a magneto-optical trap by a fast sweep of radio-frequency sidebands applied to a carrier laser. King plot analysis, which includes literature values for 7s1/2 to 7p3/2 isotope ...
متن کاملLevel Lifetime in Atomic Francium
We present the first measurement of an atomic radiative lifetime in Fr. We use a time-correlated single photon counting technique with a cold sample of 210Fr atoms in a magneto-optic trap. The results are a precision experimental test of the atomic many-body perturbation theory applied to the heaviest alkali. The lifetime for the 7p P3y2 level of 21.02s16d ns gives a value for the reduced trans...
متن کاملFrancium developments at Stony Brook
Figure 1: New system for trapping Francium an alkali, it is the heaviest atom in which the atomic properties can presently be calculated to better than 1%. The electron-nucleus interactions in heavy atoms are stronger than in lighter alkalis, and are more sensitive to weak interaction effects in nuclei, such as anapole moments, electric dipole moments and other parity violating effects. The abi...
متن کاملLifetime measurements of the 7D levels of atomic francium
We present lifetime measurements of the 7D3/2 and 7D5/2 levels of Fr. We use a time-correlated singlephoton counting technique on a sample of Fr atoms confined and cooled in a magneto-optical trap. The upper state of the 7P3/2 trapping transition serves as the resonant intermediate level for two-photon excitation of the 7D states. A probe laser provides the second step of the excitation, and we...
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ژورنال
عنوان ژورنال: Nature Chemistry
سال: 2009
ISSN: 1755-4330,1755-4349
DOI: 10.1038/nchem.430