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

Authors
BELKACEM A GOULD H FEINBERG B BOSSINGHAM R MEYERHOF WE
Citation
A. Belkacem et al., MEASUREMENT OF ELECTRON-CAPTURE FROM ELECTRON-POSITRON PAIR PRODUCTION IN RELATIVISTIC HEAVY-ION COLLISIONS, Physical review letters, 71(10), 1993, pp. 1514-1517
Citations number
22
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
10
Year of publication
1993
Pages
1514 - 1517
Database
ISI
SICI code
0031-9007(1993)71:10<1514:MOEFEP>2.0.ZU;2-U
Abstract
We have used a novel new spectrometer to make the first observation an d measurement of electron capture from e+-e- pair production in relati vistic heavy ion collisions. For a 0.96 GeV/nucleon U92+ beam the cros s 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 distributi ons of the positrons, and for comparison, the cross section for e+-e- pair production without capture is 3.30(0.65) b.