Emission of fast atoms from a cold Rydberg gas

被引:12
作者
Knuffman, B [1 ]
Raithel, G [1 ]
机构
[1] Univ Michigan, Dept Phys, FOCUS Ctr, Ann Arbor, MI 48109 USA
来源
PHYSICAL REVIEW A | 2006年 / 73卷 / 02期
关键词
D O I
10.1103/PhysRevA.73.020704
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Rydberg-Rydberg collisions in a cold, dense Rydberg gas can lead to the conversion of internal energy into center-of-mass energy of the colliding atoms, resulting in Rydberg-atom velocities much larger than the initial velocities in the gas. We prepare cold Rydberg-atom gases by laser excitation of laser-cooled atom clouds and use time-of-flight measurements to demonstrate the production of fast Rydberg atoms. The velocity distributions of Rydberg atoms emerging from the Rydberg-atom gases are obtained. State-selective field ionization spectra indicate a correlation between the production of fast Rydberg atoms and the presence of Penning ionization signatures. The dependence of the yield of fast Rydberg atoms on Rydberg atom density is measured.
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页数:4
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