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The Third Generation(e,e'K^+) Λ Hypernuclear Spectroscopy at JLab

原子核物理评论 2009年第S1期26卷 88-93页

作者： d.kawama A.Acha I.Albayrak d.Androic O.Ates P.Baturin B.Beckford W.Boeglin A.Bruell M.Christy R.Ent H.Fenker Y.Fujii M.Furic d.Gaskell S.Gogami O.Hashimoto T.Horn V.Hungerford Ed M.Jones H.Kanda C.Keppel M.Kohl L.Kramer A.Liyanage P.Markowitz T.Maruta A.Matsumura S. N.Nakamura T.Petkovic B.Raue J.Reinhold T.Seva A.Shichijo G.Smith N.Taniya W.Vulcan T.Walton S. A.Wood T.Yamamoto K.Yokota department of Physics Tohoku University department of Physics Florida International University department of Physics Hampton University department of Physics University of Zagreb Thomas Jefferson National Accelerator Facility department of Physics University of Houston

We are now preparing for the third generation (e,e' K+) Λ hypernuclear spectroscopic experiment at Hall C,Jefferson Lab (USA). The goal of the experiment is the precise spectroscopy of hypernuclei in wide mass region. We have constructed a new high resolution electron spectrometer "HES" dedicated to (e,e' K+) hypernuclear study in Japan and it was shipped to JLab in February,2008. We will discuss about the physics of the (e,e' K+) hypernuclear study at JLab and report the current preparation status of the third generatrion experiment.

关键词： hypernuclei JLab HES HKS

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Energy calibration of tagged photons by the d(γ,π^-pp) reaction

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Chinese Physics C 2010年第1期34卷 35-38页

作者：韩运成 Nobuyuki Chiga Yu Fujii Kenta Futatsukawa Osamu Hashimoto Kentaro Hirose Takatsugu Ishikawa Hiroki Kanda Masashi Kaneta daisuke kawama Kazushige Maeda Tomofumi Maruta Nayuta Maruyama Akihiko Matsumura Youhei Miyagi Koji Miwa Satoshi N. Nakamura Hajime Shimizu Koutarou Shirotori Koutaku Suzuki Tadaaki Tamae Hirokazu Tamura Kyo Tsukada 王铁山 Hirohito Yamazaki School of Nuclear Science and Technology Lanzhou University department of Physics Tohoku University Laboratory of Nuclear Science Tohoku University

The energy of tagged photons, which were provided from the internal photon tagging system of the Laboratory of Nuclear Science, Tohoku University, has been calibrated using the d（γ,π-pp） reaction. Charged pions and protons in the final state were detected with the Neutral Kaon Spectrometer （NKS2）. Photon energies were obtained from the reaction of d（γ,π-pp）. The derived photon energy was consistent with the design of the tagger system and the previous measurement using electron-positron pair production. The consistency demonstrates the performance of NKS2 and the capability of the photon energy calibration using d（γ,π-pp）.

关键词： deuteron pion photoproduction tagged photon

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Study of Charged Pion Photoproduction on deuteron with Tagged Photons

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原子核物理评论 2009年第S1期26卷 83-87页

作者： N. Chiga Y. Fujii K. Futatsukawa O. Hashimoto K. Hirose T. Ishikawa H. Kanda M. Kaneta d. kawama O. Konno K. Maeda T. Maruta N. Maruyama A. Matsumura Y. Miyagi K. Miwa S. N. Nakamura A. Sasaki H. Shimizu K. Shirotori K. Suzuki T. Tamae H. Tamura K. Tsukada H. Yamazaki department of Physics Tohoku University Laboratory of Nuclear Science Tohoku University Ichinoseki National College of Technology department of Electrical and Electric Engineering Akita University

The reactions γd→π-pp and γd→npπ+π-have been studied in an energy range from 0.8 to 1.1 GeV at the tagged photon facility of Laboratory of Nuclear Science,Tohoku University. Charged pions and protons in the final state were measured by using the Neutral Kaon Spectrometer (NKS2). The analysis of the γd→π-pp was mainly used to check the acceptance of the NKS2 and to calibrate the tagged photon energy. The photoproduction of the Δ++Δ-was identified in the γd→npπ+π-reaction. Since the data analyses are still in progress,we issue an interim report and preliminary results.

关键词： deuteron double delta pion photoproduction

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