Absence of J/sup. pi. /,T = 0/sup +/,1 level excitations in residual nuclei from (. pi. /sup + -/,2N) reactions

Journal Article · Fri May 01 04:00:00 EDT 1981 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.23.2150· OSTI ID:6437541

Stronach, C E; Lieb, B J; Funsten, H O; Kossler, W J; Plendl, H S; Lind, V G

Gamma-ray spectra taken in prompt coincidence with incident 180-MeV ..pi../sup +/, 220-MeV ..pi../sup -/, and 0-MeV ..pi../sup -/ on the self-conjugate targets /sup 12/C and /sup 32/S show that the cross sections/yields are equal to or near zero for production of the J/sup ..pi../,T = 0/sup +/,1 levels of the odd Z, odd N nuclei resulting from np removal. The 0-MeV ..pi../sup -/ results can be explained by selection rules governing one-step quasifree interactions, but the D(1232) region results cannot. This suggests that there may be additional restrictions upon the pion absorption mechanism.

• Research Organization: Virginia State University, Petersburg, Virginia 23803
• OSTI ID: 6437541
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 23:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR DISTRIBUTION
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON 10
BORON ISOTOPES
BRANCHING RATIO
CAPTURE
CARBON 12 TARGET
CHARGED-PARTICLE REACTIONS
COINCIDENCE SPECTROMETRY
CROSS SECTIONS
CYCLIC ACCELERATORS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVAPORATION MODEL
FERMIONS
GAMMA SPECTRA
HADRON REACTIONS
HADRONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
MINUTES LIVING RADIOISOTOPES
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
ODD-ODD NUCLEI
PHOSPHORUS 30
PHOSPHORUS ISOTOPES
PION MINUS REACTIONS
PION PLUS REACTIONS
PION REACTIONS
RADIATION DETECTORS
RADIOISOTOPES
SCINTILLATION COUNTERS
SELECTION RULES
SPECTRA
STABLE ISOTOPES
SULFUR 32 TARGET
SYNCHROCYCLOTRONS
TARGETS