MEASUREMENT OF ELECTRON-CAPTURE FROM ELECTRON-POSITRON PAIR PRODUCTION IN RELATIVISTIC HEAVY-ION COLLISIONS

被引：56

作者：

BELKACEM, A

GOULD, H

FEINBERG, B

BOSSINGHAM, R

MEYERHOF, WE

机构：

[1] LAWRENCE BERKELEY LAB, DIV ACCELERATOR & FUS RES, BERKELEY, CA 94720 USA

[2] LAWRENCE BERKELEY LAB, DIV NUCL SCI, BERKELEY, CA 94720 USA

[3] STANFORD UNIV, DEPT PHYS, STANFORD, CA 94305 USA

来源：

PHYSICAL REVIEW LETTERS | 1993年 / 71卷 / 10期

关键词：

D O I：

10.1103/PhysRevLett.71.1514

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have used a novel new spectrometer to make the first observation and measurement of electron capture from e+-e- pair production in relativistic heavy ion collisions. For a 0.96 GeV/nucleon U92+ beam the cross section for a Au target is 2.19(0.25) b, and the target Z dependence is Z(t)2.8+/-0.25. We also measured the energy and angular distributions of the positrons, and for comparison, the cross section for e+-e- pair production without capture is 3.30(0.65) b.

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页码：1514 / 1517

页数：4

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