Photon spectrum in pion capture on tritium
The photon spectrum from the pion capture reaction ..pi../sup -/ + t ..-->.. 3n + ..gamma.. was measured with a high-resolution pair-spectrometer to study the A = 3 system in a pure T = 3/2 state. The measured branching ratio (..pi../sup -/t ..-->.. nn..gamma..)/(..pi../sup -/t ..-->.. nnn..gamma.. or nnn) is 4.5 +- 0.8 percent. The shape of the photon spectrum is in satisfactory agreement with theoretical calculations which include final state interactions among the three neutrons. No evidence for a bound trineutron is found.
- Research Organization:
- California Univ., Berkeley (USA). Lawrence Berkeley Lab.
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 7278994
- Report Number(s):
- LBL-4268
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651225* -- Nuclear Properties & Reactions
A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BOSONS
BRANCHING RATIO
CAPTURE
CHARGED-PARTICLE REACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FINAL-STATE INTERACTIONS
GAMMA RADIATION
GAMMA SPECTRA
HADRON REACTIONS
HADRONS
INTERACTIONS
IONIZING RADIATIONS
MESON REACTIONS
MESONS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PION MINUS REACTIONS
PION REACTIONS
PIONS
PIONS MINUS
PSEUDOSCALAR MESONS
RADIATIONS
SPECTRA
TARGETS
TRITIUM TARGET
A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BOSONS
BRANCHING RATIO
CAPTURE
CHARGED-PARTICLE REACTIONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FINAL-STATE INTERACTIONS
GAMMA RADIATION
GAMMA SPECTRA
HADRON REACTIONS
HADRONS
INTERACTIONS
IONIZING RADIATIONS
MESON REACTIONS
MESONS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PION MINUS REACTIONS
PION REACTIONS
PIONS
PIONS MINUS
PSEUDOSCALAR MESONS
RADIATIONS
SPECTRA
TARGETS
TRITIUM TARGET