• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Single-and double-spinflip prob.meas, and new isoscalar spin excitations

Research Project

Project/Area Number 04402004
Research Category

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

Allocation TypeSingle-year Grants
Research Field 核・宇宙線・素粒子
Research InstitutionThe University of Tokyo

Principal Investigator

SAKAI Hideyuki  Graduate School of Science, The University of Tokyo Professor, 大学院・理学系研究科, 教授 (90030030)

Co-Investigator(Kenkyū-buntansha) SUZUKI Toru  Tokyo Metropolitan Univ., Facul.of Science, Asso.Prof., 理学部, 助教授 (20175409)
OKAMURA Hiroyuki  ICEPP,The University of Tokyo Research Associate, 素粒子物理国際研究センター, 助手 (10221144)
Project Period (FY) 1992 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥21,300,000 (Direct Cost: ¥21,300,000)
Fiscal Year 1995: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1994: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1993: ¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1992: ¥10,500,000 (Direct Cost: ¥10,500,000)
KeywordsSpinflip Probability / Tensor Polarimeter / Isoscalar Giant Resonance / Double excited Giant Resonances / Spin Collective Oscillations / Polarization Transfer Experiments / Spin Nuclear Physics / 荷電スカー巨大共鳴 / マルチワイヤードリフトチェンバー
Research Abstract

The deuteron has an intrinsic spin of 1. Therefore two spinflip probabilities, DELTAs_y=1,2, can be defined with respect to the scattering plane. The aims of this project are to search for an isoscalar spin giant resonance or to obtain information on the isoscalar effective interaction(Vsigma)which is poorly known, by measuring these single(S_1)- and double(S_2)-spinflip probabilities.
The spinflip probability for the deuteron scattering can be deduced by the vector and tensor polarization measurements for the inelastically scattered deuterons, so called a double scattering method. However the difficulty to measure the tensor polarization prevented us to deduce the spinflip probability for long time. We have, for the first time, designed and constructed the Deuteron POLarimeter(DPOL)which is capable to measure the vector and tensor polarizations simultaneously.
We had to establish the reaction or scattering which is adequate for the purpose of polarization analysis.Based on such results we improved the DPOL and subsequently measured the effective analyzing POWersof DPOL.Owing to the accelerator beam-time allocation, we, unfortunately, could not get the polarized deuteron beams as we had expected. And thus it took so long time to complete this project.
Overcoming these difficulties we succeeded, for the first time, to measure the double scattering for the ^<12>C(d, d')^<12>C reaction at E^d=270 MeV for a wide excitation energy range, 3<E_x<25 MeV,and a scattering angle range, 2.5゚ <rheta_<lab><7.5゚ and to deduce the single-and double-spinflip probabilities.It is shown that the single-spinflip probability is indeed large for the spin excitations and the double-spinflip probability is almost zero as expected for the present target and excitation energy range.
Thus we conclude that our primary goal has been achieved.

Report

(5 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] S.Ishida et al.: "Isoscalar spinflip measurements via the ^<12>C(d,d^15)reaction" Phys.Lett.B314. 279-283 (1993)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Ishida et al.: "Constraction of the Deuteron Polarimeter at RIKEN" AIP Conf.Proc.343. 182-186 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Sakai et al.,: "Single and double spinflip probability measurements for the isoscalar spin states in ^<12>C by the (d,d^1) reaction" Phys.Lett.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Ishida et al.,: "Construction of Denteron vector-and tensor-POLarimeter DPOL at RIKEN" Nucl.Instr.Meth.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Ishida et al.: "Stacly of isoscalar spin strength via the ^<12>C(d,d^1)reaction" World Scintific Pub.Co.Proc.Int.Symp.on New Facet of Spin Giant Res.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] T.Suzuki: "One-and Two-Phonon spin-dependent excitations in polarized denteron scatlering" World scientific Pub.Co.Proc.Int.Symp.on New Facet of Spin Giant Res.(印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Ishida, H.Sakai, H.Okamura, H.Otsu, N.Sakamoto, K.Hatanaka and A.Okihana: "Isoscalar spinflip measurements via the ^<12>C(d, d^1gamma)reaction." Phys.Lett.B314. 279-283 (1993)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Ishida, S.Fujita, Y.Hara, K.Hatanaka, T.Ichihara, K.Katoh, T.Niizeki, H.Okamura, H.Otsu, H.Sakai, N.Sakamoto, Y.Satou, T.Uesaka, T.Wakasa and T.Yamashita: "Construction of the Deuteron POLarimeter at RIKEN" AIP Conf.Proc.343. 182-186 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Sakai, S.Ishida, N.Sakamoto, T.Ichihara, Y.Satou, H.Okamura, H.Otsu, T.Uesaka, T.Wakasa and T.ohnishi, T.Nonaka and G.Yokoyama: "Single and double spinflip probability measurements for the isoscalar spin states in ^<12>C by the(d, d^1)reaction." Phys.Lett.B. (in print).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Construction of Deuteron vector-and tensor-POLarimeter DPOL at RIKEN.S.Ishida, N.Sakamoto, T.Ichihara, Y.Satou, H.Sakai, H.Okamura, H.Otsu, T.Uesaka, T.Wakasa and T.Ohnishi, T.Nonaka and G.Yokoyama: "Construction of Deuteron vector-and tensor-POLarimeter DPOL at RIKEN." Nucl.Instr.Meth.(in print).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] S.Ishida, N.Sakamoto, T.ichihara, Y.Satou, H.Sakai, H.Okamura, H.Otsu, T.Uesaka, T.Wakasa and T.Ohnishi, T.Nonaka and G.Yokoyama: "Study of isocalar spin strength via the ^<12>C(d, d^1)reaction." in Proceedings of the International Symposium on New Facet of Spin Giant Resonances in Nuclei, Tokyo, 1997, edited by H.Sakai, H.Okamura and T.Wakasa (World Scientific Pub.Co.Singapore, 1998). (in print.).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Toru Suzuki: "one- and two-phonon spin-dependent excitations in polarized deuteron scattering." in Proceedings of the International Symposium on New Facet of Spin Giant Resonances in Nuclei, Tokyo, 1997, edited by H.Sakai, H.Okamura and T.Wakasa(World Scientific Pub.Co.Singapore, 1998). (in print).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] H.Sakai et al: "Spin-flip probability via 26Mg (^3He,tr)^<26>Al reaction" Nucl.Phys.A588. 479-489 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] T.Wakasa et al.: "Polarization transfer D_<NN>(0°)for(D,n) reactions at 295MeV and the effective tensor interaction" Phys.Rev.C51. R2871-R2875 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Sakai et al.: "Facility for the (p,n)polarization transfer measurement" Nucl.Instr.Meth.A369. 120-134 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] S.Ishida et al.: "Construction of the Denteron POL arimeter DPOL at RIKEN" AIP Conference Proceedings. 343. 182-186 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Sakai et al.: "Spin-isospin excitations stndied by polarized beams." Nucl.Phys.(印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] N.Sakamoto et al.: "Measurement of the vector and tensor analyzing powers for the d-p elastic scattering at E=270MeV" Phys.Lett.B. (印刷中). (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] H.Sakai: "Measurements of guasi-elastic scattering and D_<NN>(0°) with (P,N)reaction" Nucl.Phys.A577. 111-122 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Okamura: "Study of the spin-dipole state via the (d^^→ the) reacticn at Ed=270 MeV" Nucl.Phys.A577. 89-92 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Sakai: "Astudy of O° fransverse polarization transfer in (p.n) reactions" Nucl.Phys.A579. 45-61 (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Okamura: "Tensor Analyzing Power of the (d,^2He) reaction at 270MeV" Phys.Lett.B345. 1-5 (1995)

    • Related Report
      1994 Annual Research Report
  • [Publications] H.Sakai: "Spectroscopy of neutron halo nucleus"Be via the "B(d,^2He)reaction at 70 MeV" Phys.Lett.B302. 7-12 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Sakai: "Spinflip Dipole Giant Resonances in Neutron Rich Light Nuclei and Neutron Halo Effects" Nucl.Phys.(in press).

    • Related Report
      1993 Annual Research Report
  • [Publications] S.Ishida: "Spinflip measurements for isoscalar transitions via the ^<12>C(d,d'α)reaction" Phys.Lett.B314. 279-283 (1993)

    • Related Report
      1993 Annual Research Report
  • [Publications] H.Sakai et al.,: "Construction and performance of one-and two-dimensimal, large position-sensitive liquid and plastic scintillation detectors" Nucl. Inst. & Meth.A320. 479-499 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] H.Otsu et al.: "Search for spontaneous π^-emissn froma ^<252>Cf source" Z.Phys.A342. 483-485 (1992)

    • Related Report
      1992 Annual Research Report
  • [Publications] H.Sakai.lt al.,: "Spectroscopy of meutron halo mucleus ^<11>Be via ^<11>B(d,^2He)reaction at 70 MeV" Phys. Lett.(1993)

    • Related Report
      1992 Annual Research Report
  • [Publications] H.Sakai et al.,: "A study of O^0 transverse polarigation transter in (P,N)reaction" Phys. Rev.C. (1993)

    • Related Report
      1992 Annual Research Report

URL: 

Published: 1992-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi