MEASUREMENT OF POSITRONIUM FORMATION IN POSITRON COLLISIONS WITH HYDROGEN-ATOMS

被引：77

作者：

SPERBER, W ^{[1
]}

BECKER, D ^{[1
]}

LYNN, KG ^{[1
]}

RAITH, W ^{[1
]}

SCHWAB, A ^{[1
]}

SINAPIUS, G ^{[1
]}

SPICHER, G ^{[1
]}

WEBER, M ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,DEPT PHYS,UPTON,NY 11973

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.68.3690

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The positronium-formation cross section was measured for positron collisions with atomic hydrogen in a crossed-beam experiment. Measurements were made in the energy range of 13 eV less-than-or-equal-to E less-than-or-equal-to 205 eV. At E = 15 +/- 2.8 eV we observed a maximum cross section of (4.3 +/- 0.8) x 10(-16) cm2; because of averaging over an energy-resolution function of 6.5 eV FWHM, the observed maximum is a lower limit of the true maximum. For E greater-than-or-equal-to 75 eV thc cross section is zero within our error margin of 0.3 x 10(-16) cm2 . No other measurements but numerous theoretical predictions are available for comparison.

引用

页码：3690 / 3693

页数：4

共 40 条

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