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Mass dependence of pion single-charge exchange to the isobaric analog state at 20 MeV

Journal Article · · Phys. Rev. C; (United States)
; ; ; ; ; ; ; ; ; ;
Forward-angle differential cross sections for pion single-charge exchange to the isobaric-analog state were measured for /sup 7/Li, /sup 14/C, /sup 15/N, and /sup 120/Sn at 20 MeV incident beam energy. Back-angle differential cross sections for /sup 7/Li were also measured. The shape of the angular distributions for light nuclei is featureless. The cross section for /sup 7/Li at 180/sup 0/ is as large as the cross section at 0/sup 0/. The A dependence of the 0/sup 0/ cross section can be expressed as g(N-Z)A/sup ..cap alpha../ (with g = 534 and ..cap alpha.. = 0.73 +- 0.09), leading to the conclusion that the nuclear medium is neither strongly absorbing nor fully transparent. The data are compared with optical-model calculations.
Research Organization:
Los Alamos National Laboratory, Los Alamos, New Mexico 87545
OSTI ID:
6204386
Journal Information:
Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 36:4; ISSN PRVCA
Country of Publication:
United States
Language:
English

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Related Subjects

651320* -- Nuclear Properties & Reactions
A=6-19
Experimental
651720 -- Nuclear Properties & Reactions
A=90-149
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BOSONS
CARBON 14 TARGET
CHARGE-EXCHANGE REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EXPERIMENTAL DATA
HADRON REACTIONS
HADRONS
INFORMATION
ISOBARIC ANALOGS
LITHIUM 7 TARGET
MESON REACTIONS
MESONS
MEV RANGE
MEV RANGE 10-100
NITROGEN 15 TARGET
NUCLEAR REACTIONS
NUMERICAL DATA
OPTICAL MODELS
PION PLUS REACTIONS
PION REACTIONS
PIONS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
TARGETS
TIN 120 TARGET