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内殻電子と原子核からの輻射が競合する制動輻射過程の研究

Research Project

Project/Area Number 09440148
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 物理学一般
Research InstitutionTohoku University

Principal Investigator

石井 慶造  東北大学, 大学院・工学研究科, 教授 (00134065)

Co-Investigator(Kenkyū-buntansha) 松山 成男  東北大学, 大学院・工学研究科, 助手 (70219525)
山崎 浩道 (山崎 浩通)  東北大学, 大学院・工学研究科, 助教授 (00166654)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1998: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1997: ¥5,500,000 (Direct Cost: ¥5,500,000)
Keywords制動輻射過程 / 原子制動輻射 / 原子核制動輻射 / イオン・原子衝突 / 内殻電離 / 反コンプトンX線検出器 / コンプトンテイル / 連続バックグラウンド
Research Abstract

本研究においては、内殻電子からの幅射(原子制動輹射)と原子核からの輻射(原子核制動輻射)が競合する制動塙射過程の研究を主題として研究が進められた。つまり、非常に軽い内殻電子と非常に重い原子核の幅射が混在し、しかもそれらが干渉し合うかどうかを探求した。
この競合するエネルギー領域のX線の発生断面積は非常に小さいので、反跳電子とコンプトン散乱ガンマ線との反同時計数によってコンプトンテイルバックグラウンドの除去が試みられた。反同時計数によってコンプトンテイルバックグラウンドは十分に取り除くことはできた。しかし、ガンマ線の多重散乱、周りからのガンマ線が作る連続のバックグラウンドが残つた:Int.Jour.PIXE,Vol.9(1999)に発表。反同時計数法の併用とピームコリメーター、ファラディーカップおよび、検出器を十分に遮蔽することにより、初めて、原子制動輻射と原子核制動輻射が競合するエネルギー領域のX線の測定に成功した。PWBA理論に基づいた理論的、展開がなされた。その結果、原子制動輻射と原子核制動輯輻射が競合するX線のエネルギー領域では、これらがお互いに干渉し合つて断面積を減少させることが分かつた。 断面積の理論値と実験値とが比較された。競合領域のエネルギースペクトルは、干渉効果を示した。X線エネルギーについての角度分布の変化は、原子制動報輻射から原子核制動塙輻射への変遷を示した:Int.Jour.PIXE,Vol.9、 1(1999)に発表。
連続X線の研究の成果を、PIXEスペクトルの解析に応用し、パラメター無しのPIXEスペクトル分析を可能にした。これによって、PIXEスペクトルを全自動で分析できる事を示した:Nucl.Instr.Meth, in Phys.Res.B150 76(1999)に発表。

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] 横田聡: "Application of Vertical-Beam In-Air PIXE to Surface Analysis of Plant Root Exposed to Aluminium Stress"International Journal of PIXE. 7・(1). 93-100 (1997)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 山崎浩道: "Determination of Heavy-Metal Concentrations in Water by PIXE Analysis Using Zr as an Internal Standard"International Journal of PIXE. 7・(1). 31-43 (1997)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 山崎浩道: "Preparation of Thin Polycarbonate Film and Its Application to PIXE Analysis of Anionic Elements in Water Samples"International Journal of PIXE. 7・(1). 101-108 (1997)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 酒井卓郎: "Development of a fast multi-parameter data acquisition system for microbean anlysis"Nuclear Instruments and Methods in Physics Research. 136-138. 390-394 (1998)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 高橋義則: "PIXE Analysis for Drinage from a Radioisotope Laboratory"International Journal of PIXE. 8・(1). 57-67 (1998)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 松山成男: "Development of a Submilli-PIXE Camea"International Journal of PIXE. 8・(2.3). 209-216 (1998)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 松山成男: "Development of a Micro-PIXE Camera"International Journal of PIXE. 8・(2.3). 203-208 (1998)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 世良耕一郎: "M-Shell X-Ray Transiton Rates for Heavy Rare Earth Elements"International Journal of PIXE. 8・(4). 235-251 (1998)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 世良耕一郎: "Land MX-Ray Production Cross Sections of Heavy Rare Earth Elements in the 3-40 MeVlamu Projectile-Energy Range"International Journal of PIXE. 8・(4). 253-266 (1998)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 佐藤隆博: "An Attempt to Suppress the Compton Scattering Background Appearing in the PIXE Spectrum"International Journal of PIXE. 8・(4). 283-288 (1998)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 室園慶介: "PIXE Spectrum Analysis Taking into Account Bremsstrahlung Spectra"Nuclear Instruments and Methods in Phys. Res. B. 150. 76-82 (1999)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 松山成男: "An Endurance Test of Kapton Foil in In-Air PIXE system"AIPconference Proceedings. 475. 480-483 (1999)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 山崎浩道: "Elemental Analysis of Soluble and Insoluble Fractions of River-Waters by Prtide-Induced X-Ray Emission"AIP conference Proceedings. 475. 443-446 (1999)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 石井慶造: "Observation of Interference Between Atomic Bremsstrahlung and Nuclear Bremsstrahlung"International Journal of PIXE. 9・(1・2). 1-10 (1999)

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 酒井卓郎: "Development of a fast multi-parameter data acqisition system for microbeam analyses" Nuclear Instruments and Methods in Physics Research B. 136-138. 390-394 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 濱野毅: "Diagnosis of the profile of the heavy-ion microbeam and estimation of the aiming accuracy of the single-ion-hit with using(R39" Radiation Physics and chemistry. 53. 461-467 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 織原彦之丞: "Isospin Mixing in the Isoparic Analog State Derived from the(p,np)Reaction on ^<140>Ce,^<172,174,176>Yb and ^<208>Pb" Pysical Review Letters. 81・17. 3607-3610 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 室園慶介: "PIXE spectrum analysis taking into account bremsstral lung spect" Nuclear Instruments and Methods in Physics Research B. (in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 山崎浩道: "Elemental Analysis of Soluble and Insoluble Fractions of River waters by Particle-Induced X-Ray Emission" The AIP Proceedings of 15^<th> International Conference on the Application of Accelerator in Research and Industry. (in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 松山成男: "An Endurance Test of Kapton Foil in-Air PIXE system" The AIP Proceedings of 15^<th> International Conference on the Application of Accelerator in Research and Industry. (in press). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 横田 聡: "Application of Vertical-Beam In-Air PIXE to Surface Analysis of Plant Root Exposed to Aluminium Stress" International Journal of PIXE. 7・1. 93-100 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 山崎浩道: "Determination of Heavy-Metal Concentrations in Water by PIXE Analysis Using Zr as an Internal Standard" International Journal of PIXE. 7・1. 31-43 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 山崎浩道: "Preparation of Thin Polycarbonate Film and Its Application to PIXE Analysis of Anionic Elements in Water Samples" International Journal of PIXE. 7・1. 101-108 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 仲 国慶: "Analog transitions in sd-and f-shell nuclei and the isovector part of optical potentials studied by the (p,n) reaction at 35 MeV" Physical Review C. 56・2. 901-907 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 結城 秀行: "Measurement of the D (d,p) T Reaction in Ti for 2.5<Ed<6.5ReV and Electron screening in Metal" Journal of the Physical Society of Japan. 66. 73-78 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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