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D(e,e'p) Coincidence Experiments in the Out-of-plane

Research Project

Project/Area Number 08044050
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionTohoku University

Principal Investigator

TAMAE Tadaaki  Tohoku University, Faculty of Science, Associate Professor, 理学部, 助教授 (10124174)

Co-Investigator(Kenkyū-buntansha) MIYASE Haruhisa  Tohoku University, Department of Physics, Professor, 大学院・理学研究科, 教授 (40005822)
HOTTA Akio  Shizuoka University, Faculty of Science, Professor, 理学部, 教授 (00022111)
SUDA Toshimi  Tohoku University, Department of Physics, Assistant, 大学院・理学研究科, 助手 (30202138)
TURCHINETZ William  マサチューセッツ工科大学, 上級研究員
PETERSON Geralg A  University of Massachusetts, Professor, 教授
TURCHINETZ  Massachusetts Institute of Technology, Senior Scientist
MISKIMEN Ror  マサチューセッツ大学, 助教授
TURCHINETZ W  マサチューセッツ工科大学, 上級研究員
HICKS Ross.S  マサチューセッツ大学, 準教授
PETERSON Ger  マサチューセッツ大学, 教授
山崎 寛仁  東北大学, 理学部, 助手 (90260413)
今野 収  東北大学, 理学部, 助手 (90004449)
前田 和茂  東北大学, 大学院・理学研究科, 助教授 (20125652)
菅原 真澄  東北大学, 理学部, 教授 (30004287)
Project Period (FY) 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 1996: ¥4,400,000 (Direct Cost: ¥4,400,000)
Keywordsout-of-plane / interference term / polarized electron beam / quasi-elastic scattering / final-state / meson exchange current / relativistic effect
Research Abstract

We made experiments, D(e,e'p) Coincidence Measurements out of the scattering plane, as a member of the OOPS collaboration at the MIT-Bates laboratory in 1996. In the experiments, a liquid deuterium target was irradiated with an electron beam, and scattered electrons and emitted protons were detected simultaneously. This experiments had advantages that the electron beam was longitudinally polarized and protons were detected out of the scattering plane. The electron beam, accelerated by an electron linac with a recirculation system has a duty factor of 1% and a polarization of 40%. Scattered electrons and emitted protons were analysed with 4 spectrometers. The experiments covered two regions, quasi-elastic and dip regions.
(1)D(e,e'p) Experiments in the quasi-elastic region.
The experiments were made at an electron energy of 800 MeV and a transferred energy of 110.6MeV. The scattered electrons were measured at 30.27゜,where a four-momentum transfer is 0.22(GeV/c)ィイD12ィエD1. We measured asymmetries, AィイD2LTィエD2, AィイD2TTィエD2, and A'ィイD2LTィエD2 at two kinematical conditions, and compared the obtained results with calculations by Arenhovel. The result shows that in the quasi-elastic region, contributions from MEC's and isobar currents are small, and relativistic effects are important.
(2)D(e,e'p) Experiments in the dip region.
The experiments were made at an electron energy of 800 MeV and a transferred energy of 155 MeV. Scattered electrons were measured at 31゜. We set three OOPS spectrometers for proton measurement at same polar angle (20.5゜)and different azimuthal angles to obtain asymmetries, AィイD2LTィエD2, AィイD2TィエD2, and A'ィイD2LTィエD2. Similar to the case in the quasi-elastic region, the longitudinal-transverse interference term shored importance of the relativistic effects.

Report

(2 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] J.Chen他: "Measurements of R_<LT>,R_<TT>,and R′_<LT> structure functions in a non-quasi-elastic ^2H (e^^→,e′p) reaction at 210 (MeV/c) missing momentum." アメリカ物理学会.

    • Related Report
      1996 Annual Research Report
  • [Publications] S.Soong他: "Measurements of R_<LT>,R_<TT>,and R′_<LT> structure functions in a quasi-elastic ^2H (e^^→,e′p) reaction at 210 (MeV/c) missing momentum." アメリカ物理学会.

    • Related Report
      1996 Annual Research Report
  • [Publications] A.Young他: "Measurements of R_<LT> and R′_<LT> structure functions in a quasi-elastic ^2H (e^^→,e′p) reaction as a function of missing momentum." アメリカ物理学会.

    • Related Report
      1996 Annual Research Report
  • [Publications] X.Jiang他: "Measurements of R_<LT> and R′_<LT> structure functions in a quasi-elastic ^<12>C (e^^→,e′p) reaction."

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2019-03-13  

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