Magnetic trapping and Zeeman relaxation of NH (X 3Σ-)

被引：111

作者：

Campbell, Wesley C. ^{[1
]}

Tsikata, Edem

Lu, Hsin-I

van Buuren, Laurens D.

Doyle, John M.

机构：

[1] Harvard Univ, Dept Phys, Cambridge, MA 02138 USA

[2] Harvard MIT Ctr Ultracold Atoms, Cambridge, MA 02138 USA

[3] Harvard Univ, Div Engn & Appl Sci, Cambridge, MA 02138 USA

来源：

PHYSICAL REVIEW LETTERS | 2007年 / 98卷 / 21期

关键词：

D O I：

10.1103/PhysRevLett.98.213001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

NH radicals are magnetically trapped and their Zeeman relaxation and energy transport collision cross sections with helium are measured. Continuous buffer-gas loading of the trap is direct from a room-temperature molecular beam. The Zeeman relaxation (inelastic) cross section of magnetically trapped electronic, vibrational, and rotational ground state NH molecules in collisions with He-3 is measured to be 3.8 +/- 1.1x10(-19) cm(2) at 710 mK. The NH-He energy transport cross section is also measured, indicating a ratio of diffusive to inelastic cross sections of gamma=7x10(4), in agreement with recent theory [R. V. Krems, H. R. Sadeghpour, A. Dalgarno, D. Zgid, J. Klos, and G. Chalasinski, Phys. Rev. A 68, 051401 (2003)].

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