| 摘要 |
PROBLEM TO BE SOLVED: To easily and accurately display dosage by including an active species generation organic compound for coloring an electron-donating organic compound by a radiation absorbent, a radiation excitation fluorescent agent, a coloring electron donor organic compound, and radiation. SOLUTION: A radiation absorbent includes such metal as barium and sulfate as a compound containing the metal. A radiation excitation fluorescent agent includes a burnt object indicated by CaWO4 or the like. A coloring fluorescent electron donor organic compound includes triphenylmethanephthalides. The organic compound is normally colorless or pale and develops color by an active species such as Broensted acid. An active species generation organic compound is a carbon tetrabromide or the like with halogen group and generates an active species irreversibly when irradiated with radiation. In an indicator, an indicator composition with an active species generation organic compound for coloring the electron donor organic compound due to the radiation absorbent, radiation excitation fluorescent agent, coloring electron donor organic compound, and a base sheet is irradiated with radiation.
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