Two-nucleon absorption of. pi. sup + in sup 4 He at T sub. pi. sup + =114 and 162 MeV

Journal Article · Mon Jun 01 04:00:00 EDT 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.2589· OSTI ID:7286366

Adimi, F; Breuer, H; Flanders, B S; Khandaker, M A; Khayat, M G; Roos, P G; Zhang, D ^[1]; Bauer, T S; Konijn, J ^[2]; de Laat, C T.A.M. ^[3]; Kyle, G S; Mukhopadhyay, S; Wang, M ^[4]; Tacik, R ^[5]

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1. Department of Physics, University of Maryland, College Park, Maryland 20742 (United States)
2. Nationaal Instituut voor Kernfysica en Hoge-Energiefysica, Postbus 4395, NL 1009 AJ Amsterdam (Netherlands)
3. Physics Laboratory, University Utrecht, Postbus 80000, 3508 TA Utrecht (Netherlands)
4. Department of Physics, New Mexico State University, Las Cruces, New Mexico 88003 (United States)
5. University of Karlsruhe, 7500 Karlsruhe (Germany)

Differential and integrated cross sections for the reaction {sup 4}He({pi}{sup +},{ital pp}) at {ital T}{sub {pi}}=114 and 162 MeV are reported. These are the first results for this reaction using a large solid angle detector covering {approx}55% of 4{pi} sr. Directly measured integrated cross sections for absorption on two-nucleon pairs are {sigma}{sub abs}=25.7{plus minus}1.8 mb at 114 MeV and {sigma}{sub abs}=21.0{plus minus}1.5 mb at 162 MeV. These cross sections, when corrected by a factor of 1.4 final state interaction effects, account for about 50% of the total absorption cross section for all final-state reaction channels at both energies. The data are compared with Monte Carlo simulations of the reaction process using a quasideuteron absorption model for the two-nucleon absorption process in a plane wave impulse approximation. The consequences for the extraction of the two-nucleon absorption cross section by imposing different conditions on the data are explored.

• OSTI ID: 7286366
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 45:6; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663460* -- Meson- & Hyperon-induced Reactions & Scattering-- (1992-)
663510 -- Nuclear Mass Ranges-- A=1-5-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ABSORPTION
BARYONS
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FINAL-STATE INTERACTIONS
HADRON REACTIONS
HADRONS
HELIUM 4 TARGET
INTERACTIONS
MESON REACTIONS
MEV RANGE
MEV RANGE 100-1000
MONTE CARLO METHOD
NUCLEAR REACTIONS
NUCLEONS
PION PLUS REACTIONS
PION REACTIONS
PROTONS
SORPTION
TARGETS
TOTAL CROSS SECTIONS