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Study of satellite structure of the rare-earth Lγ x rays reflecting many-electron effect of 4f-electronic state

Research Project

Project/Area Number 14550051
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied physics, general
Research InstitutionKinki University

Principal Investigator

ITO Shin  Kinki University, Atomic Energy Research Institute, Professor, 原子力研究所, 教授 (30144398)

Project Period (FY) 2002 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2003: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
Keywords4f electron / rare earth / Lγ x ray / satellite structure / many-electron effect / heavy-ion impact / multiple ionization
Research Abstract

1.Lγ x-ray measurement of the rare-earth elements in proton bombardment :
(1)The rare-earth targets of Gd,Tb,and Dy were bombarded with 2-9 MeV proton beams. High-resolution measurement of Lγ x rays was made. The results showed that the measured spectrum profiles of Lγ x rays were identical within the experimental energy resolution of about 11 eV(FWHM) as compared with the data obtained with x-ray or electron excitation.
(2)Theoretical calculations were made for the multiple ionization probability, the mean energy transfer and its straggling, and recoil energy. The results lead to the conclusions that the influence of the recoil effect on the 4f electrons is too small to generate change in Lγ x-ray spectrum in the present bombarding energies, however, there is a possibility to find the recoil effect below 1 MeV.
2.Basic performance of PSPC :
(1)The PSPC was improved to get higher x-ray detection efficiency. In this procedure, the phenomenon of position-peak splitting was found. Since the phenomenon may give rise to deterioration of position(energy) resolution of the present work, the mechanism of the phenomenon was studied in detail. The results will be reported in publication.

Report

(3 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • Research Products

    (3 results)

All Other

All Publications (3 results)

  • [Publications] T.Horiguchi: "Basic performance of a pressurized backgammon-type position-sensitive proportinal counter for thermal neutrons"Nuclear Instruments and Methods A. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Horiguchi et al.: "Basic performance of a pressurized backgammon-type position-sensitive proportional counter for thermal neutrons"Nuclear Instruments and Methods A. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Horiguchi: "Basic performance of a pressurized backgammon-type position-sensitive proportional counter for thermal neutrons"Nuclear Instruments and Methods A. in press.

    • Related Report
      2003 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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