Optical collisions of cold, metastable helium atoms

被引：45

作者：

Mastwijk, HC ^{[1
]}

Thomsen, JW ^{[1
]}

van der Straten, P ^{[1
]}

Niehaus, A ^{[1
]}

机构：

[1] Univ Utrecht, Dept Atom & Interface Phys, Debye Inst, NL-3508 TA Utrecht, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.80.5516

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have studied the optical collisions of cold, metastable helium atoms in a magneto-optical trap. We have detected the rate of Penning and associative ionization of two metastable helium atoms at a temperature of 1 mK with and without nearly resonant light. We find that the associative ionization rate is increased with more than a factor 20 due to the presence of the light field. We present a simple, semiclassical model, which accounts for all the observed features, and which agrees, also on an absolute scale, with our experimental results.

引用

页码：5516 / 5519

页数：4

共 20 条

[1] VELOCITY DEPENDENCE OF THE CHEMI-IONIZATION OF H2O AND D2O ON IMPACT OF 21S AND 23S HELIUM-ATOMS [J].

ALLISON, W ;

MUSCHLITZ, EE .

JOURNAL OF ELECTRON SPECTROSCOPY AND RELATED PHENOMENA, 1981, 23 (04) :339-346

[2] MAGNETOOPTICAL TRAPPING OF METASTABLE HELIUM - COLLISIONS IN THE PRESENCE OF RESONANT LIGHT [J].

BARDOU, F ;

EMILE, O ;

COURTY, JM ;

WESTBROOK, CI ;

ASPECT, A .

EUROPHYSICS LETTERS, 1992, 20 (08) :681-686

[3] Vibrational state distribution of Na-2(+) ions created in ultracold collisions [J].

Blange, JJ ;

Zijlstra, JM ;

Amelink, A ;

Urbain, X ;

Rudolph, H ;

vanderStraten, P ;

Beijerinck, HCW ;

Heideman, HGM .

PHYSICAL REVIEW LETTERS, 1997, 78 (16) :3089-3092

[4] EXOERGIC COLLISIONS OF COLD NA-STAR-NA [J].

GALLAGHER, A ;

PRITCHARD, DE .

PHYSICAL REVIEW LETTERS, 1989, 63 (09) :957-960

[5] COLD COLLISIONS IN A LASER FIELD - QUANTUM MONTE-CARLO TREATMENT OF RADIATIVE HEATING [J].

HOLLAND, MJ ;

SUOMINEN, KA ;

BURNETT, K .

PHYSICAL REVIEW A, 1994, 50 (02) :1513-1530

[6] COLD COLLISIONS OF GROUND-STATE AND EXCITED-STATE ALKALI-METAL ATOMS [J].

JULIENNE, PS ;

VIGUE, J .

PHYSICAL REVIEW A, 1991, 44 (07) :4464-4485

[7] LASER-INDUCED IONIZING COLLISIONS OF ULTRACOLD KRYPTON GAS IN THE 1(S5) METASTABLE STATE [J].

KATORI, H ;

SHIMIZU, F .

PHYSICAL REVIEW LETTERS, 1994, 73 (19) :2555-2558

[8] GENERATION OF AN INTENSE LOW-VELOCITY METASTABLE-NEON ATOMIC-BEAM [J].

KAWANAKA, J ;

HAGIUDA, M ;

SHIMIZU, K ;

SHIMIZU, F ;

TAKUMA, H .

APPLIED PHYSICS B-PHOTOPHYSICS AND LASER CHEMISTRY, 1993, 56 (01) :21-24

[9]

Landau L., 1965, QUANTUM MECH

[10]

LETT PD, 1995, ANNU REV PHYS CHEM, V46, P423, DOI 10.1146/annurev.pc.46.100195.002231

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