Evidence of Two Way X-Ray Emission from Pyroelectric Crystal

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  • YAMAOKA Rie
    Department of Regional Sciences, Graduate School of Integrated Arts and Sciences, The University of Tokushima
  • YAMAMOTO Takashi
    Department of Regional Sciences, Graduate School of Integrated Arts and Sciences, The University of Tokushima Institute of Scio-Arts and Sciences, The University of Tokushima Department of Mathematical and Material Science, Faculty of Integrated Arts and Sciences, The University of Tokushima
  • YUASA Masatoshi
    Department of Mathematical and Material Science, Faculty of Integrated Arts and Sciences, The University of Tokushima
  • IMAI Shoji
    Department of Regional Sciences, Graduate School of Integrated Arts and Sciences, The University of Tokushima Institute of Scio-Arts and Sciences, The University of Tokushima Department of Mathematical and Material Science, Faculty of Integrated Arts and Sciences, The University of Tokushima

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Other Title
  • 焦電結晶上での二元X線発生機構
  • ショウデンケッショウ ジョウ デ ノ ニゲン Xセン ハッセイ キコウ

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Abstract

<p>X-ray emission behavior from a LiTaO3 pyroelectric single crystal during heating and cooling procedure was investigated by controlling the degree of vacuum in the range of 10-4 through 20 Pa, and the heating procedure. X-ray emission was confirmed at the vacuum degree of 10-4 Pa, which was higher than those for previous reports by three orders of magnitude. The total emission intensity was almost constant in the vacuum range among 10-4 Pa and 1 Pa. X-ray emission with the use of pyroelectricity was caused by individual two processes: One is accompanied by electric discharge around z-plane of LiTaO3 single crystal within a few minutes, and is sensitive to the degree of vacuum; the other is caused by collision of floating charged particles onto the plane. X-ray emission related to the floating particles continues more than 10 minutes and is less sensitive to the vacuum. The emission intensity could be kept constant for 10 min by controlling heating rate of LiTaO3.</p>

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