Riken Corporation

Nissan Chemical Corporation

Nissan Chemical Industries Limited

The Kitasato Institute

Takuya Maeyama

Kazuaki Fukasaku

Yoshihiro Kudo

Yasuhiro Ishida

Nobuhisa Fukunishi

Kenichi Ishikawa

Takuzo Aida

Ryutaro Himeno

Takaoki Takanashi

Daniel Antonio Sahade

Shigeho Noda

Shu Takagi

Souichi Monma

Takuya Furuta

A gel forming composition for radiation dosimetry, and a high sensitivity and high safety radiation dosimeter using a gel formed from the composition. A gel forming composition for radiation dosimetry comprising a gelator and a compound of Formula (1): (wherein Ris a hydrogen atom, a halogen atom, an optionally substituted Calkyl group, etc.; and Rand Rare each independently a hydrogen atom, an optionally substituted Calkyl group, an optionally substituted monovalent Caromatic group, or Rand Rform a 4- to 8-membered ring together with a carbon atom to which Rand Rare bonded, and the 4-to 8-membered ring may have 0 to 3 nitrogen atoms, oxygen atoms, or sulfur atoms as a ring atom, provided that Rand Rare not simultaneously a hydrogen atom).

Gel forming composition for radiation dosimetry and radiation dosimeter using gel that is formed from said composition

A radiation dosimetry sol or gel, and a radiation dosimeter containing the sol or the gel as a material for radiation dosimetry. A radiation dosimetry sol or gel including a compound (A) having an excitation light-induced fluorescence property that is changed by a radiolysis product of water; and a silicate salt (B). A radiation dosimetry sol or gel including a compound (A) having an excitation light-induced fluorescence property that is changed by a radiolysis product of water; a silicate salt (B); a water-soluble organic polymer (C) having an organic acid salt structure or an organic acid anion structure; and a dispersant (D) for the silicate salt (B). A radiation dosimeter including, as a material for radiation dosimetry, the above-mentioned radiation dosimetry sol or gel.

Radiation dosimetry sol or gel and radiation dosimeter comprising same as material for radiation dosimetry

A radiation dosimetry gel is excellent in heat resistance, and a radiation dosimeter includes the radiation dosimetry gel as a material for measuring a radiation dose. A radiation dosimetry gel includes a water-soluble organic polymer (A) having an organic acid salt structure or an organic acid anion structure, a silicate (B), and a dispersant (C) for the silicate, and a radiation dosimeter includes the radiation dosimetry gel as a material for measuring a radiation dose.

Radiation dosimetry gel and radiation dosimeter comprising the same as material for measuring radiation dose

To measure three-dimensional dose distributions with a dosimeter, such as a gel dosimeter. In an embodiment of the present invention, provided is a gel dosimeter having water, as solvent or disperse medium, clay particles that swell with water, and recording material precursor, which are dissolved or dispersed with each other. The recording material precursor has an atom or ion, wherein the atom or ion changes its valence number by reacting with both of a radical and a molecular radical derivative. The radical is to be generated from the water ionized by irradiation of radiation rays, and the molecular radical derivative is a molecule to be formed by bonding the radicals with each other. By the time radiation rays are irradiated, the gel dosimeter has been free from a substance identical to the molecular radical derivative and has lost fluidity.

Gel dosimeter for measuring radiation dosage and manufacturing method therefor

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Wako, Japan

Takuya Maeyama