Magnetic trapping of silver and copper, and anomalous spin relaxation in the Ag-He system

被引：31

作者：

Brahms, Nathan ^{[1
]}

Newman, Bonna ^{[2
]}

Johnson, Cort ^{[2
]}

Greytak, Tom ^{[2
]}

Kleppner, Daniel ^{[2
]}

Doyle, John ^{[1
]}

机构：

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

[2] MIT, Dept Phys, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 10期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1103/PhysRevLett.101.103002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have trapped large numbers of copper (Cu) and silver (Ag) atoms using buffer-gas cooling. Up to 3x10(12) Cu atoms and 4x10(13) Ag atoms are trapped. Lifetimes are as long as 5 s, limited by collisions with the buffer gas. Ratios of elastic to inelastic collision rates with He are greater than or similar to 10(6), suggesting Cu and Ag are favorable for use in ultracold applications. The temperature dependence of the Ag-(3)He collision rate varies as T(5.8 +/- 0.4). We find that this temperature dependence is inconsistent with the behavior predicted for relaxation arising from the spin-rotation interaction, and conclude that the Ag-(3)He system displays anomalous collisional behavior in the multiple-partial wave regime. Gold (Au) was ablated into (3)He buffer gas, however, atomic Au lifetimes were observed to be too short to permit trapping.

引用

页数：4

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