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 |
Fingerprint
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 -