Search for resonances in multiphoton final states from low-energy {ital e}{sup +}{ital e{minus}} scattering

Journal Article · Tue Mar 01 04:00:00 EST 1994 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.49.1551· OSTI ID:144786

Vo, D T; Kelly, W H; Wohn, F K; Hill, J C; Vary, J P ^[1]; Deleplanque, M A; Stephens, F S; Oliveira, J R.B.; Macchiavelli, A O ^[2]; Becker, J A; Henry, E A; Brinkman, M J; Stoyer, M A ^[3]; Draper, J E ^[4]

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1. Iowa State University, Ames, Iowa 50011 (United States)
2. Nuclear Science Division, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)
3. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
4. University of California, Davis, California 95616 (United States)

We have performed a search for resonant states in low energy {ital e}{sup +}{ital e{minus}} scattering through their decay to multiphoton final states using {ital e}{sup +} from {sup 68}Ga sources and a Pb absorber. We obtained energy-sum and invariant mass spectra of coincident 2{gamma} and 3{gamma} events using the 20-element High Energy-Resolution Array (HERA) facility. No evidence for resonant states was found, and upper limits for the partial decay widths of such resonances were established in the energy range from 1.1 to 1.8 MeV.

• DOE Contract Number: FG02-92ER40692; FG02-87ER40371; AC03-76SF00098; W-7405-ENG-48
• OSTI ID: 144786
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 3 Vol. 49; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
AXIONS
ELECTRON-POSITRON COLLISIONS
GAMMA SPECTROSCOPY
MEV RANGE 01-10
RESONANCE PARTICLES