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2024年10月30日

The Application of Fission Fragments Chamber in Direct Measurement of Heavy Λ Hypernucear Lifetime

  • In this paper a new method to measure the lifetime of heavy hypernuclei is introduced, and the main device used in the measurement — fission fragment chamber (FFC) — is tested by a 252Cf spontaneous source at Thomas Jefferson National Accelerator Facility (JLab). The chamber has a single-module timing resolution of ~163ps. Based on the timing resolution tested, our computer simulation predicts that the error of the measured lifetime is about 9.6ps.
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  • [1] . GUO H, YANG S, HU Xiang et al. Chinese Physics, 2001,10: 8052. Hashimoto O, Tamura H. Progress in Particle and NuclearPhysics, 2006, 57: 5643. Krmpotic F, Tadic D. Brazilian Journal of Physics, 2003,33: 1874. Grace R, Barnes P D. Eisenstein R A et al. Phy. Rev. Let.,1985, 55: 10555. Szymanski J J, Barnes P D, Diebold G E et al. Phys. Rev.,1991, C43: 8496. Ohm H, Hermes T, Borgs W et al. Phys. Rev., 1997, C55:30627. Aemstrong T A, Bocquet J P, Ericsson G et al. Phys. Rev.,1993, C47: 19578. Sakaguchi A, Bruckner W, Paul S et al. Phys. Rev., 1991,C43: 739. Noumi H, Ajimura S, Ejiri H et al. Phys. Rev., 1995, C52:293610. Bhang H, Ajimura S, Aoki K et al. Phy. Rev. Let., 1998,81: 432111. Park H, Bhang H, Youn M et al. Phy. Rev., 2000, C61:054004-112. Metag V, Liukkonen E, Sletten G et al. Nucl. Instrum.Methods, 1974, 114: 44513. Kamys B, Kulessa P, Ohm H et al. Eur. Phys. J., 2001,A11: 114. Kulessa P, Rudy Z, Hartmann M et al. Phys. Letter, 1998,B427: 40315. Kulessa P, Cassing W, Jarczyk L et al. Acta PhysicaPolonica, 2002, B33: 60316. Cassing W, Jarczyk L, Kamys B et al. Eur. Phy. J., 2003,A16: 54917. Rudy Z, Cassing W, Jarczyk L et al. Eur. Phy. J., 1999,A5: 12718. Assamagan K, Baker K, Bayatyan G et al. Nucl. Instrum.Methods, 1999, 426: 40519. Tang L. FIZIKA B, 2004, 13: 27920. HU J M, ZHUO Y Z. Nuclear Theory(Vol. 2). Beijing:Atom Energy Press, 1996. 334-339(in Chinese)(胡济民,卓益忠.原子核理论(第2卷).北京:原子能出版社,1996. 334-339)21. Schr#246;der W U, Huizenga J R. Nucl. Phys., 1989, A502:473c
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SONG Yu-Shou, LUO Wei, TANG Li-Guang and HU Bi-Tao. The Application of Fission Fragments Chamber in Direct Measurement of Heavy Λ Hypernucear Lifetime[J]. Chinese Physics C, 2007, 31(8): 755-759.
SONG Yu-Shou, LUO Wei, TANG Li-Guang and HU Bi-Tao. The Application of Fission Fragments Chamber in Direct Measurement of Heavy Λ Hypernucear Lifetime[J]. Chinese Physics C, 2007, 31(8): 755-759. shu
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Received: 2006-11-22
Revised: 2007-01-15
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The Application of Fission Fragments Chamber in Direct Measurement of Heavy Λ Hypernucear Lifetime

    Corresponding author: SONG Yu-Shou,
  • School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China2 Thomas Jefferson National Accelerator Facility, VA 23606, USA

Abstract: In this paper a new method to measure the lifetime of heavy hypernuclei is introduced, and the main device used in the measurement — fission fragment chamber (FFC) — is tested by a 252Cf spontaneous source at Thomas Jefferson National Accelerator Facility (JLab). The chamber has a single-module timing resolution of ~163ps. Based on the timing resolution tested, our computer simulation predicts that the error of the measured lifetime is about 9.6ps.

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