Abstract The color indicator-dosimeter of ionizing radiation in accordance with the invention comprises 70 to 100 parts by weight of a thermoplastic polymer, 10 to 40 parts by weight of a plasticizer, 0.5 to 3.0 parts by weight of a stabilizer and two dyes compatible with said polymer. One of said dyes is incorporated in the color indicator-dosimeter to the extent of from 0.007 to 0.01 part by weight; its G value of decolorization in the polymer is 0.05 to 0.1 molecule/100 eV and its absorption maximum lies in the 450 to 590 nm spectral range. The other of said two dyes is incorporated in the color indicator-dosimeter to the extent of from 0.015 to 0.03 part by weight; its G value of decolorization in the polymer is 0.15 to 1.5 molecule/100 eV and its absorption maximum lies in the 600 to 720 nm spectral range. The proposed color indicator-dosimeter of ionizing radiation permits measuring dose rates in the range from 0.5 × 10 6 to 3.5 × 10 7 rad to within ± 25 to 30 percent visually and to within ±15 to 20 percent objectively. The proposed color indicator-dosimeter of ionizing radiation is not responsive to light; its color does not change after irradiation for at least 12 months.
Inventors
👤 Georgy Mitrofanovich Panchenkov
👤 Leonid Leonidovich Kozlov
👤 Alexandr Alexandrovich Molin
👤 Zinaida Fedorovna Ershova
👤 Lev Mikhailovich Mikhailov
👤 Albert Genrikhovich Juzvyak
👤 Rail Bakirovich Valitov
👤 Vyacheslaw Petrovich Churov
👤 Mikhail Petrovich Grinev
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 21:28
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/02; G01T1/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
A color indicator-dosimeter of ionizing radiation, comprising from 70 to 100 parts by weight of a thermoplastic polymer, from 10 to 40 parts by weight of a plasticizer, from 0.5 to 3.0 parts by weight of a stabilizer and two dyes compatible with said polymer, one of said dyes being incorporated in the color indicator-dosimeter to the extent of from 0.007 to 0.01 part by weight and having a G value of decolorization in said polymer of from 0.05 to 0.1 molecule/100 eV, with the absorption maximum thereof lying in the 450 to 590 nm spectral range, whereas the other of said two dyes is incorporated in the color indicator-dosimeter to the extent of from 0.015 to 0.03 part by weight and has a G value of decolorization in said polymer of from 0.15 to 1.5 molecule/100 eV, with the absorption maximum thereof lying in the 600 to 720 nm spectral range.
Claim 2
Dependent Claim
152 words
A color indicator-dosimeter of ionizing radiation, comprising from 70 to 100 parts by weight of a thermoplastic polymer, from 10 to 40 parts by weight of a plasticizer, from 0.5 to 3.0 parts by weight of a stabilizer and two dyes compatible with said polymer, one of said dyes being incorporated in the color indicator-dosimeter to the extent of from 0.007 to 0.01 part by weight and having a G value of decolorization in said polymer of from 0.05 to 0.1 molecule/100 eV, with the absorption maximum thereof lying in the 450 to 590 nm spectral range, whereas the other of said two dyes is incorporated in the color indicator-dosimeter to the extent of from 0.015 to 0.03 part by weight and has a G value of decolorization in said polymer of from 0.15 to 1.5 molecule/100 eV, with the absorption maximum thereof lying in the 600 to 720 nm spectral range.
Claim 3
Dependent Claim
53 words
A color indicator-dosimeter of ionizing radiation as set forth in claim 1, wherein the dye having a G value of decolorization of from 0.05 to 0.1 molecule/100 eV and the absorption maximum lying in the 450 to 590 nm spectral range is selected from the group consisting of xanthene, polymethine and pyrazolone dyes.
Claim 4
Dependent Claim
56 words
A color indicator-dosimeter of ionizing radiation as set forth in claim 1, wherein the dye having a G value of decolorization of from 0.15 to 1.5 molecule/100 eV and the absorption maximum lying in the 600 to 720 nm spectral range is selected from the group consisting of triarylmethane, indigoid, thiazine, indophenol, indamine and indaniline dyes.