New data for total $^{3}\mathrm{He}$($\ensuremath{\gamma},p$)D and $^{3}\mathrm{He}$($\ensuremath{\gamma},\mathit{pp}$)n cross sections compared to current theory

New data for total ${}^{3}{He}$ ( $γ, p$ )D and ${}^{3}{He}$ ( $γ, pp$ )n cross sections compared to current theory

S. Naito, Y. Nagai, T. Shima, H. Makii, K. Mishima, K. Tamura, H. Toyokawa, H. Ohgaki, J. Golak, R. Skibiński, H. Witała, W. Glöckle, A. Nogga, and H. Kamada

Phys. Rev. C 73, 034003 – Published 17 March 2006

Abstract

A simultaneous measurement of the cross sections of the ${}^{3}{He}$ ( $γ, p$ )D and ${}^{3}{He}$ ( $γ, pp$ )n reactions has been performed for the first time using monoenergetic pulsed γ-rays at $〈 E_{γ} 〉 =$ 10.2 and 16.0 MeV. Charged fragments from the reactions were detected with an efficiency of 100% using a 4π time projection chamber containing ${}^{3}{He}$ 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.

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Received 4 October 2005

DOI:https://doi.org/10.1103/PhysRevC.73.034003

Authors & Affiliations

S. Naito^1,*, Y. Nagai^1,†, T. Shima¹, H. Makii^1,‡, K. Mishima^1,§, K. Tamura^2,∥, H. Toyokawa³, H. Ohgaki⁴, J. Golak⁵, R. Skibiński⁵, H. Witała⁵, W. Glöckle⁶, A. Nogga⁷, and H. Kamada⁸

¹Research Center for Nuclear Physics, Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan
²Department of Physics, Tokyo Institute of Technology, Meguro, Tokyo 152-8551, Japan
³Research Institute of Instrumentation Frontier, National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan
⁴Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611-0011, Japan
⁵M. Smoluchowski Institute of Physics, Jagiellonian University, Krakow, 30-059, Poland
⁶Ruhr-Universität, Bochum D-44780, Germany
⁷Forschungszentrum Jülich, Institut für Kernphysik (Theorie), D-52425 Jülich, Germany
⁸Department of Physics, Faculty of Engineering, Kyushu Institute of Technology, 1-1 Sensuicho, Tobata, Kitakyushu 804-8550, Japan

^*Present address: Toshiba Co., Ltd., 8, Shinsugita-Cho, Isogo,Yokohama 235-8523, Japan.
^†Electronic address: nagai@rcnp.osaka-u.ac.jp
^‡Present address: Tokai Research and Development Center, Japan Atomic Energy Agency, Happo-shirane, Tokai-mura, Naka-gun, Ibaraki 319-1195, Japan.
^§Present address: RIKEN (Institute of Physical and Chemical Research), 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
^∥Present address: ERNST&YOUNG SHINNIHON, Hibiya Kokusai Bldg., 2-2-3, Uchisaiwai-cho, Chiyoda-ku, Tokyo 100-0011, Japan.

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Vol. 73, Iss. 3 — March 2006

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Physical Review C

covering nuclear physics

New data for total ${}^{3}{He}$ ( $γ, p$ )D and ${}^{3}{He}$ ( $γ, pp$ )n cross sections compared to current theory

S. Naito, Y. Nagai, T. Shima, H. Makii, K. Mishima, K. Tamura, H. Toyokawa, H. Ohgaki, J. Golak, R. Skibiński, H. Witała, W. Glöckle, A. Nogga, and H. Kamada

Phys. Rev. C 73, 034003 – Published 17 March 2006

Abstract

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Physical Review C

covering nuclear physics

New data for total He3(γ,p)D and He3(γ,pp)n cross sections compared to current theory

S. Naito, Y. Nagai, T. Shima, H. Makii, K. Mishima, K. Tamura, H. Toyokawa, H. Ohgaki, J. Golak, R. Skibiński, H. Witała, W. Glöckle, A. Nogga, and H. Kamada

Phys. Rev. C 73, 034003 – Published 17 March 2006

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New data for total ${}^{3}{He}$ ( $γ, p$ )D and ${}^{3}{He}$ ( $γ, pp$ )n cross sections compared to current theory