Measurement of electron capture from electron-positron pair production in relativistic heavy ion collisions

We have used a novel new spectrometer to make the first observation and measurement of electron capture from [ital e][sup +]-[ital e][sup [minus]] pair production in relativistic heavy ion collisions. For a 0.96 GeV/nucleon U[sup 92+] beam the cross section for a Au target is 2.19(0.25) b, and the t...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
Veröffentlicht in:	Physical review letters 1993-09, Vol.71 (10), p.1514-1517
Hauptverfasser:	BELKACEM, A, GOULD, H, FEINBERG, B, BOSSINGHAM, R, MYERHOF, W. E
Format:	Artikel
Sprache:	eng
Schlagworte:	663450 - Heavy-Ion-Induced Reactions & Scattering- (1992-) 663580 - Nuclear Mass Ranges- A=190-219- (1992-) 664300 - Atomic & Molecular Physics- Collision Phenomena- (1992-) ANGULAR DISTRIBUTION ANTILEPTONS ANTIMATTER ANTIPARTICLES Atomic and molecular collision processes and interactions ATOMIC AND MOLECULAR PHYSICS ATOMIC NUMBER BEAMS CAPTURE Charge transfer CHARGED PARTICLES CHARGED-PARTICLE REACTIONS CROSS SECTIONS DATA DISTRIBUTION ELECTRON CAPTURE ELECTRON-POSITRON INTERACTIONS ELEMENTARY PARTICLES ELEMENTS ENERGY ENERGY LEVELS ENERGY RANGE Exact sciences and technology EXPERIMENTAL DATA FERMIONS GOLD HEAVY ION REACTIONS HEAVY IONS INFORMATION INTERACTIONS ION BEAMS IONS KINETIC ENERGY LEPTON-LEPTON INTERACTIONS LEPTONS MATTER MEASURING INSTRUMENTS METALS Nuclear physics NUCLEAR PHYSICS AND RADIATION PHYSICS NUCLEAR REACTIONS Nuclear reactions: specific reactions NUMERICAL DATA PAIR PRODUCTION PARTICLE INTERACTIONS PARTICLE PRODUCTION Physics POSITRONS Relativistic heavy-ion collisions Relativistic heavy-ion reactions (collisions induced by light ions studied to calibrate relativistic heavy ion collisions, should be classified under both 001b20e75 and the 001b10c ou 001b20e category appropriate to the light ions) RELATIVISTIC RANGE SPECTROMETERS TARGETS TRANSITION ELEMENTS URANIUM IONS YIELDS
Online-Zugang:	Volltext
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	We have used a novel new spectrometer to make the first observation and measurement of electron capture from [ital e][sup +]-[ital e][sup [minus]] pair production in relativistic heavy ion collisions. For a 0.96 GeV/nucleon U[sup 92+] beam the cross section for a Au target is 2.19(0.25) b, and the target [ital Z] dependence is [ital Z][sub [ital t]][sup 2.8[plus minus]0.25]. We also measured the energy and angular distributions of the of the positrons, and for comparison, the cross section for [ital e][sup +]-[ital e][sup [minus]] pair production without capture is 3.30(0.65) b.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.71.1514