Reaction 58Ni(π+,pp) at Tπ+=160 MeV
Creators
- 1. Department of Physics and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (USA)
- 2. Department of Physics and Astronomy, University of Maryland, College Park, Maryland 20742 (USA)
- 3. Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208 (USA)
- 4. Department of Physics, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061 (USA)
- 5. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
Description
The reaction 58Ni(π+,pp) was studied with good energy resolution for an incident pion energy of 160 MeV. The angular correlation of the outgoing protons was measured for θlab=30 degree, 75 degree, and 130 degree. From these angular correlations the contribution from direct two-nucleon absorption was extracted. A Monte Carlo calculation modeling the absorption process in terms of initial-state scattering of the pion before absorption, two-nucleon absorption, and final-state scattering of the outgoing nucleons is compared to the data. We conclude that within this framework the two-nucleon mechanism can account for less than half of the total absorption cross section in 58Ni. We report results for the low-energy coincidence proton spectra (down to 5 MeV) which suggest that most of these protons come from evaporation. Angular correlation data for the reaction 58Ni(π-,pp) are also presented
Additional details
Publishing Information
- Journal Title
- Physical Review, C
- Journal Volume
- 41
- Journal Issue
- 5
- Series
- Phys. Rev., C.
- Journal Page Range
- 2215-2228
- ISSN
- 0556-2813
- CODEN
- PRVCA
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 21070022
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Resource subtype / Literary indicator
- Numerical Data
- Descriptors DEI
- ANGULAR CORRELATION; CAPTURE; COINCIDENCE SPECTROMETRY; CROSS SECTIONS; DISTORTED WAVE THEORY; EVAPORATION MODEL; EXPERIMENTAL DATA; IMPULSE APPROXIMATION; MEV RANGE 100-1000; MONTE CARLO METHOD; NICKEL 58 TARGET; PION PLUS REACTIONS; PROTON SPECTRA; PROTONS
- Descriptors DEC
- BARYONS; CATIONS; CHARGED PARTICLES; COINCIDENCE METHODS; CORRELATIONS; COUNTING TECHNIQUES; DATA; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; HADRON REACTIONS; HADRONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; INFORMATION; IONS; MATHEMATICAL MODELS; MESON REACTIONS; MEV RANGE; NUCLEAR MODELS; NUCLEAR REACTIONS; NUCLEONS; NUMERICAL DATA; PION REACTIONS; SPECTRA; TARGETS