(. pi. /sup +/,p) and (. pi. /sup +/,d) reactions on light nuclei

Journal Article · Mon Feb 01 04:00:00 EST 1982 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.25.962· OSTI ID:5783828

Doss, K G.R.; Barnes, P D; Colella, N; Dytman, S A; Eisenstein, R A; Ellegaard, C; Takeutchi, F; Wharton, W R; Amann, J F; Pehl, R H; Thompson, A C

The (..pi../sup +/,p) and (..pi../sup +/,d) reactions on 1p shell nuclei are studied between T/sub ..pi../ = 32 and 81 MeV. Cross sections both to the continuum and to discrete two body final states are given. The spectra and angular distributions of the (..pi../sup +/,p) continuum are examined in terms of a two-nucleon pion absorption mechanism. The /sup 12,13/C(..pi../sup +/,p) spectra of discrete states are similar to the corresponding /sup 12,13/C(p,d) spectra at the same momentum transfer. The /sup 16/O(..pi../sup +/,p)/sup 15/O(g.s.) transition is found to have an abnormally small cross section relative to other transitions of similar spectroscopic strength. The two-neutron pickup (..pi../sup +/,d) data to discrete states is the first published data on this reaction. The (..pi../sup +/,d) reaction is found to favor strongly transitions in the 1p shell of angular momentum transfer L = 2. The relative strength of these L = 2 transitions varies the same way as the corresponding (p,t) cross sections. No L = 0 transitions are clearly identifiable. The (..pi../sup +/,d) angular distributions are compared to the calculations of Betz and Kerman. The calculations reproduce well the absolute magnitude and shape of the (..pi../sup +/,d) angular distributions but fail to predict the L dependence, pion energy dependence, and possibly even the spin transfer dependence of the (..pi../sup +/,d) cross sections.

• Research Organization: Carnegie-Mellon University, Pittsburgh, Pennsylvania 15213
• OSTI ID: 5783828
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 25:2; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651325* -- Nuclear Properties & Reactions
A=6-19
Experimental-- Nuclear Reactions & Scattering-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ANGULAR DISTRIBUTION
BARYONS
BORON 10 TARGET
CAPTURE
CARBON 12 TARGET
CARBON 13 TARGET
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DEUTERONS
DIRECT REACTIONS
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
HADRON REACTIONS
HADRONS
INFORMATION
LITHIUM 7 TARGET
MESON REACTIONS
MEV RANGE
MEV RANGE 10-100
NUCLEAR REACTIONS
NUCLEONS
NUMERICAL DATA
OXYGEN 16 TARGET
OXYGEN 18 TARGET
PICKUP REACTIONS
PION PLUS REACTIONS
PION REACTIONS
PROTONS
TARGETS
TRANSFER REACTIONS