Cross-section measurements and phase shift analysis of p-/sup 4/He elastic scattering in the energy range 20--55 MeV

Journal Article · Wed Nov 01 04:00:00 EST 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.18.1985· OSTI ID:6645661

Houdayer, A; Davison, N E; Elbakr, S A; Sourkes, A M; van Oers, W T.H.; Bacher, A D

Measurements have been made of the p + /sup 4/He elastic scattering angular distributions at T = 21.85, 23.90, 25.75, 28.10, 30.35, 32.15, 34.25, 36.90, 39.75, 42.45, 44.05, 44.95, and 47.65 MeV in the angular range 10/sup 0/ < or approx. = theta/sub c.m./ < or approx. = 170/sup 0/. The data obtained have in general relative errors smaller than 2%, while the absolute scale of the measurements has an uncertainty of less than 2.5%. These data together with differential cross sections and analyzing power angular distributions elected from the literature, as well as total reaction cross section information have been subjected to a phase shift analysis. Up to 45 MeV a single, continuous solution could be determined using phase shifts up through G-waves. As in an earlier phase shift analysis the phase shifts exhibit a smooth variation with energy except for the well-known resonance region around 23.4 MeV. Above 45 MeV some improvement was obtained with the inclusion of a small H-wave contribution. New total reaction cross section data were employed as a constraint on the imaginary parts of the phase shifts. The new analsis corroborates an early finding that the inelasticity is mainly associated with the even partial waves.

• Research Organization: Cyclotron Laboratory, Department of Physics, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
• OSTI ID: 6645661
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651225* -- Nuclear Properties &amp; Reactions
A=1-5
Experimental-- Nuclear Reactions &amp; Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANALYZING POWER
ANGULAR DISTRIBUTION
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DISTRIBUTION
ELASTIC SCATTERING
ENERGY RANGE
HADRON REACTIONS
HELIUM 4 TARGET
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUCLEON REACTIONS
PARTIAL WAVES
PHASE SHIFT
PROTON REACTIONS
SCATTERING
TARGETS
TOTAL CROSS SECTIONS