Yazar "Nakajima, D." seçeneğine göre listele

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    Hypernuclear spectroscopy of products from Li-6 projectiles on a carbon target at 2 A GeV
    (ELSEVIER SCIENCE BV, 2013) Rappold, C.; Kim, E.; Nakajima, D.; Saito, T. R.; Bertini, O.; Bianchin, S.; Achenbach, P.
    A novel experiment, aiming at demonstrating the feasibility of hypernuclear spectroscopy with heavy ion beams, was conducted. Using the invariant mass method, the spectroscopy of hypernuclear products of Li-6 projectiles on a carbon target at 2 A GeV was performed. Signals of the Lambda-hyperon and H-3(Lambda) and H-4(Lambda) hypernuclei were observed for final states of p + pi(-), He-3 + pi(-) and He-4 + pi(-), respectively, with significance values of 6.7, 4.7 and 4.9 sigma. By analyzing the proper decay time from secondary vertex distribution with the unbinned maximum likelihood fitting method, their lifetime values were deduced to be 262(-43)(+56) +/- 45 ps for Lambda, 183(-32)(+42) +/- 37 ps for H-3(Lambda), and 140(-33)(+48) +/- 35 ps for H-4(Lambda). (c) 2013 Elsevier B.V. All rights reserved.
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    Latest Results From the HypHI Experiments at GSI: Hypernuclear Spectroscopy with Heavy Ion Induced Reactions
    (SPRINGER WIEN, 2013) Saito, T. R.; Kim, E.; Nakajima, D.; Rappold, C.; Bianchin, S.; Borodina, O.; Yoshida, K.
    The HypHI Phase 0 experiment with Li-6 projectiles at 2 AGeV on a carbon target has been performed at GSI in order to demonstrate the feasibility of hypernuclear spectroscopy with induced reaction of heavy ion beams. Current data analyses have shown peaks in invariant mass distributions of p + pi (-) for I >, He-3+ pi (-) for (3) (I >) H and He-4 + pi (-) for (4) (I >) H. Lifetime values for the corresponding peaks have been also deduced, which are in good agreement with the former known values.
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    Production of hypernuclei in peripheral HI collisions: The HypHI project at GSI
    (ELSEVIER SCIENCE BV, 2012) Saito, T. R.; Nakajima, D.; Rappold, C.; Bianchin, S.; Borodina, O.; Bozkurt, V.; Achenbach, P.
    The HypHI Phase 0 experiment with Li-6 projectiles at 2 A GeV on a carbon target has been performed at GS' in order to demonstrate the feasibility of precise hypernuclear spectroscopy with peripheral heavy ion collisions. Current data analyses have preliminary shown peaks in invariant mass distributions of p + pi(-) for Lambda, He-3 + pi(-) for H-3(Lambda) and He-4 + pi(-) for H-4(Lambda). Lifetime values for the corresponding peaks have been also deduced, which is in good agreement with the former known values. (C) 2012 Elsevier B.V. All rights reserved.
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    Scintillating fiber detectors for the HypHI project at GSI
    (ELSEVIER SCIENCE BV, 2009) Nakajima, D.; Oezel-Tashenov, B.; Bianchin, S.; Borodina, O.; Bozkurt, V.; Gokuzum, B.; Fukuda, T.
    The construction and properties of three sets of two-dimensional scintillating fiber detector arrays for tracking of charged particles used in the HypHI Phase 0 experiment at GSI will be reported in this paper. The position resolutions and the detection efficiency of detectors have been obtained for each layer of detectors by using Li-6 primary beams and particles with Z = 1 produced by fragment reactions of Xe-136 projectiles on the hydrogen target. Besides, the response of energy deposition of charged particles in the first detector set placed right behind the target has been studied by using light projectile fragments with Z = 1, 2 and 3 produced by Ni-58 and C-12 beams. Extracted resolutions for energy deposition and position as well as the detection efficiency fulfill the requirements of the HypHl Phase 0 experiment. (C) 2009 Elsevier B.V. All rights reserved.