Direct production of electron-positron pairs by 200-GeV/nucleon oxygen and sulfur ions in nuclear emulsion | Zendy

J. H. Derrickson | Zendy; P. B. Eby | Zendy; K. H. Moon | Zendy; T. A. Parnell | Zendy; D. T. King | Zendy; J. C. Gregory | Zendy; Yoshiyuki Takahashi | Zendy; T. Ogata | Zendy

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Direct production of electron-positron pairs by 200-GeV/nucleon oxygen and sulfur ions in nuclear emulsion

Author(s) -

J. H. Derrickson,

P. B. Eby,

K. H. Moon,

T. A. Parnell,

D. T. King,

J. C. Gregory,

Yoshiyuki Takahashi,

T. Ogata

Publication year - 1995

Publication title -

physical review a

Language(s) - English

Resource type - Journals

eISSN - 1094-1622

pISSN - 1050-2947

DOI - 10.1103/physreva.51.1253

Subject(s) - physics , nuclear emulsion , nucleon , ion , electron , positron , nuclear physics , atomic physics , pair production , emulsion , coulomb , oxygen , quantum mechanics , chemical engineering , engineering

Measurements of direct Coulomb electron-positron pair production have been made on the tracks of relativistic heavy ions in nuclear track emulsion. Tracks of ${\mathrm{O}}^{16}$ and ${\mathrm{S}}^{32}$ at 200 GeV/nucleon were studied. The measured total cross sections and energy and emission angle distributions for the pair members are compared to theoretical predictions. The data are consistent with some recent calculations when knock-on electron contamination is accounted for.

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