/sup 3/He(. pi. /sup -/,n)/sup 2/H and /sup 4/He(. pi. /sup -/,n)/sup 3/H at 50--295 MeV
Journal Article
·
· Phys. Rev. C; (United States)
OSTI ID:5987010
The cross section of ..pi../sup -/+/sup 3/He..-->..d+n and ..pi../sup -/+/sup 4/He..-->..t+n has been measured at energies between T = 50 and 295 MeV and angles between theta/sub n/roughly-equal20/sup 0/ and 150/sup 0/ covering the momentum transfer range qroughly-equal0.4 --1.0 GeV/c. A phenomenological analysis of the data is attempted to identify the characteristic T, theta, and q dependences of the (..pi..,n) reaction dynamics. Most conspicuous is the angular dependence of the /sup 4/He(..pi../sup -/,n)/sup 3/He which mirrors characteristic features of ..pi..+He elastic scattering. The T dependence of (..pi..,n) in /sup 3,4/He (for theta<70/sup 0/) is similar to ..pi..+N or ..pi..+He elastic scattering. The clear dependence of T and theta is indicative of ..pi..+N (off-shell) scattering in the basic pion-absorption process. The nuclear form factor q dependence is most pronounced for forward angles, and the largely exponential falloff with q is similar to that of analogous nuclear reactions. Comparisons with theoretical calculations show that crucial ingredients are missing in currently used models and general directions of needed refinements are indicated.
- Research Organization:
- University of Virginia, Charlottesville, Virginia 22901
- OSTI ID:
- 5987010
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 24:3; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
/sup 3,4/He(. pi. /sup -/,n)/sup 2,3/H and /sup 3/He(. pi. /sup -/,. pi. /sup 0/)/sup 3/H at 285--575 MeV
Superratio and the simple ratios of. pi. sup + and. pi. sup minus elastic scattering on sup 3 H and sup 3 He at 180 MeV to investigate charge symmetry
Test of charge symmetry in. pi. /sup +/ and. pi. /sup -/ elastic scattering on tritium and /sup 3/He
Journal Article
·
Sun Oct 31 23:00:00 EST 1982
· Phys. Rev. C; (United States)
·
OSTI ID:6616746
Superratio and the simple ratios of. pi. sup + and. pi. sup minus elastic scattering on sup 3 H and sup 3 He at 180 MeV to investigate charge symmetry
Journal Article
·
Fri Jun 01 00:00:00 EDT 1990
· Physical Review, C (Nuclear Physics); (USA)
·
OSTI ID:6940196
Test of charge symmetry in. pi. /sup +/ and. pi. /sup -/ elastic scattering on tritium and /sup 3/He
Journal Article
·
Sun Feb 26 23:00:00 EST 1984
· Phys. Rev. Lett.; (United States)
·
OSTI ID:6582222
Related Subjects
651225* -- Nuclear Properties & Reactions
A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYONS
CAPTURE
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DEUTERONS
DISTRIBUTION
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FORM FACTORS
HADRON REACTIONS
HADRONS
HELIUM 3 TARGET
HELIUM 4 TARGET
MESON REACTIONS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE PROPERTIES
PION MINUS REACTIONS
PION REACTIONS
SCATTERING
TARGETS
A=1-5
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYONS
CAPTURE
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DEUTERONS
DISTRIBUTION
ELASTIC SCATTERING
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FORM FACTORS
HADRON REACTIONS
HADRONS
HELIUM 3 TARGET
HELIUM 4 TARGET
MESON REACTIONS
MEV RANGE
MEV RANGE 10-100
MEV RANGE 100-1000
NEUTRONS
NUCLEAR REACTIONS
NUCLEONS
PARTICLE PROPERTIES
PION MINUS REACTIONS
PION REACTIONS
SCATTERING
TARGETS