LASER COOLING OF A HELIUM ATOMIC-BEAM

被引：9

作者：

MORITA, N

KUMAKURA, M

机构：

[1] Institute for Molecular Science, Okazaki, 444, Myodaiji

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1991年 / 30卷 / 9B期

关键词：

LASER COOLING; HELIUM ATOM; METASTABLE STATE; LNA LASER; ZEEMAN TUNING; DOPPLER COOLING; DOPPLER PROFILE; ELECTRON BOMBARDMENT;

D O I：

10.1143/JJAP.30.L1678

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The laser cooling of a helium atomic beam in the 2s3S1 metastable state has been demonstrated. Using a single-mode LNA (La1-xNdxMgAl11O19) laser resonant with the 2s3S1-2p3P2 transition, the metastable atoms are cooled by the Doppler cooling method combined with the Zeeman-tuning technique. To monitor the velocity distribution, the Doppler profile of the 2p3P2-3d3D3 transition is observed. As a result, the most probable velocity of the metastable helium atoms, which is initially 750 m/s, is decelerated to 90 m/s.

引用

页码：L1678 / L1681

页数：4

共 15 条

[1] LASER COOLING BELOW THE ONE-PHOTON RECOIL ENERGY BY VELOCITY-SELECTIVE COHERENT POPULATION TRAPPING [J].