DIAGNOSTICS OF A POSITRONIUM BEAM

被引：38

作者：

ZAFAR, N

LARICCHIA, G

CHARLTON, M

GRIFFITH, TC

机构：

[1] Department of Physics and Astronomy, University College London, London, WC1E 6BT, Gower Street

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 1991年 / 24卷 / 21期

关键词：

D O I：

10.1088/0953-4075/24/21/016

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A time-of-flight technique has been used to characterize the components of a positronium (Ps) beam generated by charge-exchange reactions of positrons in helium and argon gases. Ground and excited states of positronium have been resolved and the ratios of the signal rates of Ps to both scattered and incident positrons have been quantified in the Ps energy range 7-41 eV. By observing the pressure dependence of these ratios estimates of the Ps total scattering cross sections have been extracted for both gases at energies in the same range.

引用

页码：4661 / 4670

页数：10

共 19 条

[1]

Brown B. L., 1987, Atomic Physics with Positrons. Proceedings of a NATO Advanced Research Workshop, P241

[2]

Brown B. L., 1985, Positron Annihilation. Proceedings of the Seventh International Conference, P328

[3]

BROWN BL, 1986, 3RD P INT WORKSH POS, P212

[4] POSITRON IMPACT PHENOMENA [J].