OXYGEN QUENCHING OF POSITRONIUM IN SILICA-GELS

被引：9

作者：

HOPKINS, B

ZERDA, TW

机构：

[1] Physics Department, Texas Christian University, Fort Worth

来源：

PHYSICS LETTERS A | 1990年 / 145卷 / 2-3期

关键词：

D O I：

10.1016/0375-9601(90)90207-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Positronium decay rates have been measured in silica gels of various pore sizes, at two temperatures, 297 and 77 K, and as a function of oxygen concentration. The cross section of positronium quenching due to a monolayer of adsorbed O2 at 77 K is found to be at least two orders of magnitude smaller than the cross section for conversion quenching by subsequent layers, and is similar to that observed in gaseous oxygen. No evidence of chemical quenching has been observed. © 1990.

引用

收藏

页码：141 / 145

页数：5

相关论文

共 18 条

[1] POSITRONIUM DIFFUSION IN SOLIDS [J].

BRANDT, W ;

PAULIN, R .

PHYSICAL REVIEW LETTERS, 1968, 21 (04) :193-&

[2]

CELITANS CJ, 1964, P PHYS SOC LOND, V83, P833

[3] EFFECT OF THE ENERGY-LOSS PROCESS ON THE ANNIHILATION OF ORTHOPOSITRONIUM IN SILICA AEROGEL [J].

CHANG, TB ;

XU, M ;

ZENG, XT .

PHYSICS LETTERS A, 1987, 126 (03) :189-194

[4] BROMINE AND OXYGEN QUENCHING OF POSITRONIUM IN SILICA-GEL [J].

CHUANG, SY ;

TAO, SJ .

APPLIED PHYSICS, 1974, 3 (03) :199-204

[5] STUDY OF INHIBITION AND QUENCHING OF POSITRONIUM BY IODINE AND CCL4 [J].

CHUANG, SY ;

TAO, SJ .

JOURNAL OF CHEMICAL PHYSICS, 1970, 52 (02) :749-&

[6] ADSORPTION OF OXYGEN ON POROUS VYCOR GLASS BY AN EPR TECHNIQUE [J].

CLARKSON, RB ;

TURKEVICH, J .

JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1972, 38 (01) :165-+

[7] OXYGEN QUENCHING OF POSITRON LIFETIMES IN LIQUIDS [J].

COOPER, AM ;

LAIDLAW, GJ ;

HOGG, BG .

JOURNAL OF CHEMICAL PHYSICS, 1967, 46 (06) :2441-&

[8] POSITRONIUM INTERACTIONS WITH GASES IN PORES OF SILICA-GELS [J].

GOLDANSKI, VI ;

MOKRUSHIN, AD ;

TATUR, AO ;

SHANTAROVICH, VP .

APPLIED PHYSICS, 1975, 5 (04) :379-382

[9]

GOLDANSKII VI, 1968, HIGH ENERG CHEM, V2, P77

[10] OBSERVATION OF TRIPLET SINGLET CONVERSION OF POSITRONIUM VIA INELASTIC-SCATTERING BY OXYGEN [J].

KAKIMOTO, M ;

HYODO, T ;

CHIBA, T ;

AKAHANE, T ;

CHANG, TB .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1987, 20 (03) :L107-L113