Kyushu Institute of Technology Academic Repository
Kyutacarは九州工業大学で生産された研究成果を オープンアクセスで提供する機関リポジトリシステムです。 Kyutacar is open-access repository of research by members of the Kyushu Institute of Technology.
Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
Research Institute of Instrumentation Frontier, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
M. Smoluchowski Institute of Physics, Jagiellonian University, Krakow, 30-059, Poland
M. Smoluchowski Institute of Physics, Jagiellonian University, Krakow, 30-059, Poland
M. Smoluchowski Institute of Physics, Jagiellonian University, Krakow, 30-059, Poland
Ruhr-Universität, Bochum D-44780, Germany
Forschungszentrum Jülich, Institut für Kernphysik (Theorie), D-52425 Jülich, Germany
Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensuicho, Tobata, Kitakyushu 804-8550, Japan
抄録
A simultaneous measurement of the cross sections of the 3He(γ,p)D and 3He(γ,pp)n reactions has been performed for the first time using monoenergetic pulsed γ-rays at E=10.2 and 16.0 MeV. Charged fragments from the reactions were detected with an efficiency of 100% using a 4 time projection chamber containing 3He gas as an active target. The incident γ-ray flux was measured by a γ-ray detector. Both the track and energy loss signals of charged fragments were obtained in an off-line analysis and used to clearly identify the reaction channel. Thus, the (γ,p) and (γ,pp) cross sections have been determined with small uncertainty. A comparison of the new data to current theory based on the AV18+Urbana IX nuclear forces including π- and ρ-like meson exchange currents shows a severe discrepancy at 10.2 MeV, while at 16.0 MeV data and theory agree within about 12%. Three-nucleon force effects are small, but in general shift the theory in the correct direction.
New data for total 3He(γ,p)D and 3He(γ,pp)n cross sections compared to current theory
73034003.pdf
(327.08KB)
