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1993 Fiscal Year Final Research Report Summary

STUDY OF NUCLEAR INTERACTIONS BY PRECISE MEASUREMENT OF POLARIZATION OBSERVABLES IN FEW-NUCLEON SYSTEMS

Research Project

Project/Area Number 03452023
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 核・宇宙線・素粒子
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

SAGARA Kenshi  Kyushu Univ., Fac. of Science, Research Associate, 理学部, 助手 (00128026)

Co-Investigator(Kenkyū-buntansha) NAKAMURA Hiroyuki  Kyushu Univ., Fac. of Science, Research Associate, 理学部, 助手 (70172434)
NAKASHIMA Takao  Kyushu Univ., Fac. of Science, Associate Prof., 理学部, 助教授 (90037200)
MORINOBU Shunpei  Kyushu Univ., Fac. of Science, Prof., 理学部, 教授 (50016078)
Project Period (FY) 1991 – 1993
KeywordsLow energy 3-nucleon system / Nucleon-nucleon potential / Analyzing power / Scattering cross section / Precise measurement / Proton-deuteron scattering / Capture gamma reaction / Polarized neutron beam
Research Abstract

The cross section, the vector and tensor analyzing powers of the p+d scattering below 18 MeV have been measured very accurately, and compared with the 3-body Faddeev calculation. The large (-25%) discrepancy between the experiment and the calculation at the maximum of Ay was not completely explained by the modification of the LS potential proposed by Takemiya. Besides, similarly large discrepancies were found also in the cross section and tensor analyzing powers. These facts indicate that the scalar, spin-vector and tensor components of the present nucleon-nucleon (NN) potentials need to be improved.
After solving many experimental problems, the tensor analyzing powers of the d+p->^3He+gamma reaction at 17.5 MeV have been measured by 5-10 times more accurately than the previous data. The data showed apparent disagreement with the Faddeev calculation by Ishikawa-Sasakawa. Moreover, inclusion of the 3-nucleon force (3NF) enhanced the disagreement, contrary to the previous result at 29 MeV.The present data provided a severe constraint for the NN tensor force and the 3NF.
To make a precise experiment on the n+d Ay, the intensity of the d beam was increased to 0.4 muA, and an n beam course was constructed at the Kyushu University tandem accelerator lab. Then test experiments were repeated on the production of the n beam, on the shielding of neutron and gamma-rays, and on the adjustment and the improvement of the detector systems. Moreover, it was confirmed that the n+d experiment could be made at RIKEN, using a high intensity d beam from the injector cyclotron. The experimental methods to measure the n beam polarization using n+^4He scattering within 1 % and to make accurate n+d Ay experiment have been established.

  • Research Products

    (36 results)

All Other

All Publications (36 results)

  • [Publications] 相良 建至: "陽子-重陽子散乱から探る2核子間ポテンシャル" 日本物理学会誌. 49. 220-223 (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sagara: "Energy dependence of Analyzing Power Ay and Cross Section for p+d Scattering Below 18 MeV" Physical Review C. (発表予定). (1994)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 相良 建至: "九大タンデムにおける偏極中性子ビームの生成" 第6回タンデム加速器及びその周辺技術の研究会報告集. 1. 58-61 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sagara: "Systematic Measurement on p+d Cross Section at 2-18 MeV" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 1-3 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Shimizu: "Vector Analyzing Power A_y on P^^→+d Scattering at E_p=2-4 MeV" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 4-6 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Shimizu: "Vector and Tensor Analyzing Powers in H(d^^→,d) Scattering at E_d=5-6MeV" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 7-9 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Miwa: "Vector and Tensor Analyzing Powers in H(d^^→,d) Scattering at E_d=8-18MeV" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 10-13 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Ueno: "Experimental Investigation on 3-Boby Force in H(d^^→,^3He)γ Reaction" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 14-16 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Nishimori: "Polarized Neutron Source" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 109-110 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Nishimori: "Separation of Neutron and γ-Ray Scintillation Signals" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 111-113 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] N.Nishimori: "Liquid Helium Scintillator for Neutron" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 114-115 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Shimizu: "A Polarimeter for 2-4 MeV Proton Beam" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 116-117 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Shimizu: "Relative Calibration of a Deuteron Beam Polarimeter" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 118-119 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Ochiishi: "Absolute Calibration of Deuteron Beam Polarimeters" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 120-122 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Ueno: "Thin Carbon Foil Windows for a Gas Target Cell" KUTL(Kyushu Univ.Tandem Accelerator Lab.Report). 4. 125-127 (1993)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] K.Sagara: "Nucleon-Nucleon Potentials Investigated from Proton-Deuteron Scattering" Nihon Buturi Gakkaisi. 49#3. 220-223 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sagara: "Production of Polarized Neutron Beam at Kyushu University Tandem Laboratory" Reports of 6th Symposium on Tandem Accelerator and Related Techniques. 58-61 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sagara, S.Shimizu, K.Maeda, H.Nakamura and T.Nakashima: "Systematic Measurement on p+d Cross Section at 2-18 MeV" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 1-3 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Shimizu, K.Sagara, T.Miwa, N.Nishimori, S.Ueno, K.Maeda, H.Nakamura and T.Nakashima: "Vector Analyzing Power Ay on p+d Scattering at Ep = 2-4 MeV" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 4-6 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Simizu, K.Sagara, T.Miwa, N.Nishimori, S.Ueno, K.Maeda, H.Nakamura and T.Nakashima: "Vector and Tensor Analyzing Powers in H(d, d) Scattering at Ed = 5-6 MeV" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 7-9 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T.Miwa, N.Nishimori, S.Ueno, R.Koyasako, K.Nakashima, H.Akiyoshi, H.Ochiishi, S.Shimizu, K.Maeda, H.Nakamura, K.Sagara and T.Nakashima: "Vecro and Tensor Analyzing Powers in H(d, d) Scattering at Ed = 8-18 MeV." KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 10-13 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Ueno, H.Akiyoshi, R.Koyasako, K.Nakashima, T.Miwa, N.Nishimori, H.Ochiishi, K.Maeda, S.Shimizu, H.Nakamura, K.Sagara and T.Nakashima: "Experimental Investigation on 3-Body Force in H(d, 3He)gamma Reaction" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 14-16 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Nishimori, T.Miwa, S.Ueno, H.Akiyoshi, R.Koyasako, K.Nakashima, H.Ochiishi, S.Shimizu, K.Maeda, H.Nakamura, K.Sagara and T.Nakashima: "Polarized Neutron Source" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 109-110 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Nishimori, K.Sagara, T.Maeda and K.Maeda: "Separation of Neutron and gamma-Ray Scintillation Signals" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 111-113 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Nishimori and K.Sagara: "Liquid Helium Scintillator for Neutron" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 114-115 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Shimizu, K.Sagara, T.Miwa, N.Nishimori, S.Ueno, K.Maeda, H.Nakamura and T.Nakashima: "A Polarimeter for 2-4 MeV Proton Beam" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 116-117 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Shimizu, K.Sagara, T.Miwa, N.Nishimori, S.Ueno, K.Maeda, H.Nakamura and T.Nakashima: "Relative Calibration of a Deutron Beam Polarimeter" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 118-119 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Ochiishi, K.Sagara, K.Maeda, H.Nakamura, S.Shimizu, T.Miwa, N.Nishimori, S.Ueno, H.Akiyoshi, R.Koyasako, K.Nakashima and T.Nakashima: "Absolute Calibration of Deuteron Beam Polarimeters" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 120-122 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Ueno and K.Sagara: "Thin Carbon Foil Windows for a Gas Target Cell" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 125-127 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] N.Nishimori, K.Sagara and K.Maeda: "Data Acquisition System on OS2" KUTL(Kyushu Univ. Tandem Accelerator Lab. Report). 4. 145-147 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sagara, S.Shimizu, H.Oguri, T.Miwa, S.Ueno, N.Nishimori, K.Maeda, H.Nakamura and T.Nakashima: "High Precision Measurement on p+d Cross Section and Analyzing Powers" Proceedings of the Japan-China Joint Nuclear Physics Symposium, Tokyo. 331-333 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sagara, H.Oguri, S.Shimizu, K.Maeda, H.Nakamura and T.Nakashima: "Precise Systematic Measurement on p+d Scattering below 18 MeV" Contributions of XIII International Conference on Few-Body Problems in Physics, Adelaide. 284-285 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] H.Shimizu, K.Sagara, K.Maeda, H.Nakamura, T.Miwa, N.Nishimori, S.Ueno and T.Nakashima: "Analyzing Powers for p+d Scattering below Deuteron Breakup Threshold" Contributions of XIII International Conference on Few-Body Problems in Physics, Adelaide. 308-309 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S.Shimizu, K.Sagara, H.Nakamura, K.Maeda and T.Nakashima: "Precise Measurement on analyzing Powers for Low Energy p+d Scattering" RCNP-P(Report of Research Center for Nuclear Physics, Osaka University). 118. 57-67 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sagara: "Precise Experiment on Low Energy Three-Nucleon Systems in the Near Future" RCNP-P(Report of Research Center for Nuclear Physics, Osaka University). 118. 68-75 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K.Sagara, H.Oguri, S.Shimizu, K.Maeda, H.Nakamura T,.Nakashima and S.Morinobu: "Energy Dependence of Analyzing Power Ay and Cross Section for p+d Scattering below 18 MeV" Physical Review C. to be published. (1994)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1995-03-27  

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