Observation of the double isobaric analog transition /sup 18/O(. pi. /sup +/,. pi. /sup -/) /sup 18/Ne at 50 MeV

Journal Article · Mon Sep 16 04:00:00 EDT 1985 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.55.1273· OSTI ID:5212948

Altman, A; Johnson, R R; Wienands, U; Hessey, N; Barnett, B M; Forster, B M; Grion, N; Mills, D; Rozon, F M; Smith, G R

The angular distribution of the differential cross sections for the transition to the double isobaric analog state in the reaction /sup 18/O(..pi../sup +/,..pi../sup -/) /sup 18/Ne was measured at six angles from 20/sup 0/ to 120/sup 0/. Extrapolation of the differential cross section results in 5.3 +- 0.5 ..mu..b/sr at 0/sup 0/ and an angle-integrated cross section of 16.7 +- 1.2 ..mu..b. The forward peaking and magnitude of the cross sections differ from those predicted by simple sequential models and the trends of data at higher energies. The results are compared to recent data for the same transition on /sup 14/C at 50 MeV and to a calculation in the six-quark bag model.

• Research Organization: Department of Physics, University of British Columbia, Vancouver, British Columbia V6T 2A6, Canada
• OSTI ID: 5212948
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 55:12; ISSN PRLTA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANGULAR DISTRIBUTION
ANGULAR MOMENTUM
BAG MODEL
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BOSONS
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
COMPOSITE MODELS
CROSS SECTIONS
CYCLIC ACCELERATORS
CYCLOTRONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
EXTENDED PARTICLE MODEL
HADRON REACTIONS
HADRONS
INFORMATION
ISOBARIC ANALOGS
ISOCHRONOUS CYCLOTRONS
ISOTOPES
LIGHT NUCLEI
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MESON REACTIONS
MESONS
MEV RANGE
MEV RANGE 10-100
MULTIWIRE PROPORTIONAL CHAMBERS
NEON 18
NEON ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
OXYGEN 18 TARGET
PARITY
PARTICLE MODELS
PARTICLE PROPERTIES
PION PLUS REACTIONS
PION REACTIONS
PIONS
PIONS MINUS
PROPORTIONAL COUNTERS
PSEUDOSCALAR MESONS
QUARK MODEL
RADIATION DETECTORS
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SPIN
TARGETS
TRIUMF CYCLOTRON