Energy dependence of two-nucleon pion absorption on [sup 16]O

Journal Article · Mon Mar 01 04:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.1184· OSTI ID:6698434

Hyman, S D; Mack, D J; Roos, P G; Breuer, H; Chant, N S; Khazaie, F; Ritchie, B G; Silk, J D ^[1]; Kyle, G S ^[2]; Amaudruz, P A; Ingram, C H.Q.; Renker, D; Schumacher, R A; Sennhauser, U ^[3]; Bauer, T S ^[4]; Burger, W J ^[5]

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1. Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)
2. Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
3. Paul Scherrer Institute, CH-5234, Villigen (Switzerland)
4. Physics Lab, University of Utrecht, Utrecht (Netherlands)
5. Massachusetts Institute of Technology, Bates Laboratory, Middleton, Massachusetts 01949 (United States)

Inclusive [sup 16]O([pi][sup +],[ital p]) and exclusive [sup 16]O([pi][sup +],2[ital p]) data are presented for 115 MeV and 165 MeV pions. Using a combination of distorted-wave impulse approximation (DWIA) calculations for two-nucleon absorption and phase space simulations for more complicated processes, the data are fit and the total direct two-nucleon absorption cross sections are extracted. These cross sections fall faster with energy than [pi][sup +][ital d][r arrow][ital pp]. The DWIA calculations were used to calculate the effects of final state interactions (FSI). After correcting for FSI, the two-nucleon absorption process is found to dominate at 115 MeV, becoming less important as the incident energy increases to 165 MeV. The decrease with energy in the two-nucleon fraction of the total absorption cross section is found to be in remarkably good agreement with theoretical predictions.

• OSTI ID: 6698434
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 47:3; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

663460* -- Meson- & Hyperon-induced Reactions & Scattering-- (1992-)
663520 -- Nuclear Mass Ranges-- A=6-19-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABSORPTION
BARYONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DISTORTED WAVE THEORY
ELEMENTARY PARTICLES
ENERGY RANGE
EXCLUSIVE INTERACTIONS
FERMIONS
FINAL-STATE INTERACTIONS
HADRON REACTIONS
HADRONS
IMPULSE APPROXIMATION
INCLUSIVE INTERACTIONS
INTEGRAL CROSS SECTIONS
INTERACTIONS
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
NUCLEAR REACTIONS
NUCLEONS
OXYGEN 16 TARGET
PARTICLE INTERACTIONS
PION PLUS REACTIONS
PION REACTIONS
PROTONS
SORPTION
TARGETS