Experimental techniquesNo Access

Carbonized Treatment of Biological Samples for High Beam Current PIXE - its advantages and problems -

M. KOHNO

Department of Nuclear Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606–01, Japan

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K. YOSHIDA

Department of Nuclear Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606–01, Japan

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K. MORITANI

Department of Nuclear Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606–01, Japan

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K. NORIZAWA

Department of Nuclear Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606–01, Japan

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M. NAITO

Department of Nuclear Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606–01, Japan

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K. KITAO

Department of Nuclear Engineering, Kyoto University, Yoshida, Sakyo, Kyoto 606–01, Japan

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K. ENAMI

Department of Mechanical and System Engineering, Ryukoku University, Yokotani 1–5, Setaooe, Otsu 520–21, Japan

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H. MAEDA

Department of Mechanical and System Engineering, Ryukoku University, Yokotani 1–5, Setaooe, Otsu 520–21, Japan

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H. KASAJIMA

Department of Mechanical and System Engineering, Ryukoku University, Yokotani 1–5, Setaooe, Otsu 520–21, Japan

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, and

J. TAKADA

Research Reactor Institute, Kyoto University, Kumatori, Sennnan, Osaka 590–04, Japan

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https://doi.org/10.1142/S0129083596000168Cited by:1 (Source: Crossref)

Abstract

Trace elements in ancient Chinese ink, ancient Chinese paper of sutras, ancient Japanese paper of manuscripts, modem Japanese paper and some plants were analyzed by PIXE. Part of these samples were carbonized at 400°C in vacuum of several torrs. These carbonized biological samples were able to resist very high current of 2 MeV He⁺ (500 nA/mm² on target) for more than 30 minutes. The observation indicates that the carbonized samples save the measuring time by using high beam current. But mercury and sulfur contained in red Chinese ink on the paper were lost through the carbonization and lead in the same sample was lost by heating up during the measurement on condition that it was irradiated by 2 MeV He⁺ (50 nA/mm² to 230 nA/mm²). A small part of iron was gradually lost on the same condition. Under 230 nA/mm², a small portion of calcium was lost but no portion of chromium was lost.