Abstract
We have measured double and triple coincidences following π+ and π- absorption on 4He at various pion energies. Differential and integrated cross sections are determined for all possible absorption channels. We study and compare the two-nucleon absorption on nucleon pairs with isospin I = 0 and I = 1. In the dNN final-state two absorption mechanisms are identified, one with only one spectator nucleon and one with phase-space behavior. The existence of a three-nucleon absorption component with a spectator nucleon is established and a four nucleon phase-space-like contribution is also identified and found to be small. The total absorption cross section is directly determined by adding the integrated cross sections of all measured reaction channels.
Original language | English (US) |
---|---|
Pages (from-to) | 413-454 |
Number of pages | 42 |
Journal | Nuclear Physics, Section A |
Volume | 517 |
Issue number | 3-4 |
DOIs | |
State | Published - Oct 29 1990 |
Externally published | Yes |
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Keywords
- Nuclear reactions
ASJC Scopus subject areas
- Nuclear and High Energy Physics
Cite this
Pion absorption in flight on 4He. / Steinacher, M.; Backenstoss, G.; Izycki, M.; Salvisberg, P.; Weber, P.; Weyer, H. J.; Hoffart, A.; Rzehorz, B.; Ullrich, H.; Dzemidzic, Mario; Furić, M.; Petković, T.
In: Nuclear Physics, Section A, Vol. 517, No. 3-4, 29.10.1990, p. 413-454.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Pion absorption in flight on 4He
AU - Steinacher, M.
AU - Backenstoss, G.
AU - Izycki, M.
AU - Salvisberg, P.
AU - Weber, P.
AU - Weyer, H. J.
AU - Hoffart, A.
AU - Rzehorz, B.
AU - Ullrich, H.
AU - Dzemidzic, Mario
AU - Furić, M.
AU - Petković, T.
PY - 1990/10/29
Y1 - 1990/10/29
N2 - We have measured double and triple coincidences following π+ and π- absorption on 4He at various pion energies. Differential and integrated cross sections are determined for all possible absorption channels. We study and compare the two-nucleon absorption on nucleon pairs with isospin I = 0 and I = 1. In the dNN final-state two absorption mechanisms are identified, one with only one spectator nucleon and one with phase-space behavior. The existence of a three-nucleon absorption component with a spectator nucleon is established and a four nucleon phase-space-like contribution is also identified and found to be small. The total absorption cross section is directly determined by adding the integrated cross sections of all measured reaction channels.
AB - We have measured double and triple coincidences following π+ and π- absorption on 4He at various pion energies. Differential and integrated cross sections are determined for all possible absorption channels. We study and compare the two-nucleon absorption on nucleon pairs with isospin I = 0 and I = 1. In the dNN final-state two absorption mechanisms are identified, one with only one spectator nucleon and one with phase-space behavior. The existence of a three-nucleon absorption component with a spectator nucleon is established and a four nucleon phase-space-like contribution is also identified and found to be small. The total absorption cross section is directly determined by adding the integrated cross sections of all measured reaction channels.
KW - Nuclear reactions
UR - http://www.scopus.com/inward/record.url?scp=0000668292&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000668292&partnerID=8YFLogxK
U2 - 10.1016/0375-9474(90)90210-D
DO - 10.1016/0375-9474(90)90210-D
M3 - Article
AN - SCOPUS:0000668292
VL - 517
SP - 413
EP - 454
JO - Nuclear Physics A
JF - Nuclear Physics A
SN - 0375-9474
IS - 3-4
ER -