Measurement of electron capture from e[sup +]-e[sup [minus]] pair production by 0. 956 GeV/u U[sup 92+] on Au, Ag, Cu, and Mylar targets

Conference · Wed Dec 15 04:00:00 EST 1993 · AIP Conference Proceedings (American Institute of Physics); (United States)

OSTI ID:5002629

Belkacem, A; Gould, H; Feinberg, B; Bossingham, R ^[1]; Meyerhof, W E ^[2]

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1. Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
2. Stanford University, Stanford, California 94305 (United States)

We describe the first experimental observation of electron capture from electron-positron pair production in relativistic heavy ion collisions. We have used a novel new spectrometer to make the measurement of the cross section for a 0.956 GeV/u U[sup 92+] beam produced at the BEVALAC facility at LBL on Au, Ag, Cu, and Mylar targets. We also measured the energy and angular distribution of the positrons for the Au target. The total cross section for a Au target is measured to be 2.19 (0.25) barns for capture from pair production and 3.30 (0.65) barns for pair production without capture.

• DOE Contract Number: AC03-76SF00098
• OSTI ID: 5002629
• Report Number(s): CONF-9309229--
• Conference Information: Journal Name: AIP Conference Proceedings (American Institute of Physics); (United States) Journal Volume: 295:1
• Country of Publication: United States
• Language: English

Related Subjects

664300* -- Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
74 ATOMIC AND MOLECULAR PHYSICS
ANGULAR DISTRIBUTION
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
CAPTURE
CHARGED PARTICLES
COLLISIONS
COPPER
DISTRIBUTION
ELECTRON CAPTURE
ELECTRONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
ESTERS
FERMIONS
GEV RANGE
GOLD
INTERACTIONS
ION COLLISIONS
IONS
LEPTONS
MATERIALS
MATTER
METALS
MULTICHARGED IONS
MYLAR
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PAIR PRODUCTION
PARTICLE PRODUCTION
PETROCHEMICALS
PETROLEUM PRODUCTS
PLASTICS
POLYESTERS
POLYMERS
POSITRONS
RELATIVISTIC RANGE
SILVER
SYNTHETIC MATERIALS
TRANSITION ELEMENTS
URANIUM IONS