Ultracold collision properties of metastable alkaline-earth atoms

被引：58

作者：

Derevianko, A ^{[1
]}

Porsev, SG

Kotochigova, S

Tiesinga, E

Julienne, PS

机构：

[1] Univ Nevada, Dept Phys, Reno, NV 89557 USA

[2] Natl Inst Stand & Technol, Atom Phys Div, Gaithersburg, MD 20899 USA

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.90.063002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ultracold collisions of spin-polarized Mg-24, Ca-40, and Sr-88 in the metastable P-3(2) excited state are investigated based on molecular potentials obtained from ab initio calculations. We calculate the long-range interaction potentials and estimate the scattering length and the collisional loss rate as a function of magnetic field. The scattering lengths show resonance behavior due to the appearance of a molecular bound state in a purely long-range interaction potential and are positive for magnetic fields below 50 mT. A loss-rate model shows that losses should be smallest near zero magnetic field and for fields slightly larger than the resonance field, where the scattering length is also positive.

引用

页数：4

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