Search for resonant states in positron-electron scattering using a positron gas target

Conference · Mon Oct 15 04:00:00 EDT 1990

OSTI ID:6477438

Cowan, T E; Howell, R H; Rohatgi, R R ^[1]; Fajans, J ^[2]

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1. Lawrence Livermore National Lab., CA (USA)
2. California Univ., Berkeley, CA (USA). Dept. of Physics

Narrow correlated positron-electron peaks discovered in superheavy nuclear collisions may be signatures for previously undetected neutral particle-like objects having masses of 1--2 MeV/c{sup 2}. We have designed an experiment to definitively test this hypothesis by searching for resonant states formed directly in the scattering of monoenergetic electrons incident on a gas of cold positrons confined magnetically in a Malmberg trap. This technique will provide a hundred-fold improvement in sensitivity to e{sup +}e{sup {minus}} resonances compared to previous positron-beam, thin-foil scattering experiments. Together with a recoil-shadow technique, this experiment will explore a five decade range in neutral-particle lifetimes (10{sup {minus}13}s to 10{sup {minus}8}s) which cannot be probed directly to other methods. 14 refs., 2 figs., 1 tab.

• Research Organization: Lawrence Livermore National Lab., CA (USA)
• Sponsoring Organization: DOE/DP
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6477438
• Report Number(s): UCRL-JC-105379; CONF-901116--31; ON: DE91005062
• Country of Publication: United States
• Language: English

Related Subjects

651000* -- Nuclear Physics
651100 -- Nuclear Physics-- Experimental Techniques-- (1980-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BEAMS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ELECTRON BEAMS
ELECTRON-POSITRON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HEAVY ION REACTIONS
INELASTIC SCATTERING
INTERACTIONS
LEPTON BEAMS
LEPTON-LEPTON INTERACTIONS
LEPTONS
NUCLEAR REACTIONS
PARTICLE BEAMS
PARTICLE INTERACTIONS
RESONANCE SCATTERING
SCATTERING
TRAPS