Initial color development in radiochromic dye films after a short intense pulse of accelerated electrons
Por:
Uribe R.M., Barcelo M., McLaughlin W.L., Buenfil A.E., Rios J.
Publicada:
1 ene 1990
Resumen:
The radiation response of different dye precursors in several host plastics has been investigated after a single short-pulse irradiation with 2.5-MeV electrons. It was observed that in most films the radiation-initiated color development proceeds mainly during the first 300 seconds, after such high dose-rate irradiation (~ 10 12 Gy/s). Absorption spectra show that the main absorption band increases at the expense of a shorter-wavelength precursor absorption band, showing an isosbestic point approximately midway between the two absorption bands. It was found that a certain combination of dye precursor and host plastic (namely a polyamide containing an aromatic group) constitutes a film which shows a very fast increase in optical density of the main absorption band, making it suitable for immediate dosimetric analysis in very high dose-rate installations.The radiation response of different dye precursors in several host plastics has been investigated after a single short-pulse irradiation with 2.5-MeV electrons. It was observed that in most films the radiation-initiated color development proceeds mainly during the first 300 seconds, after such high dose-rate irradiation (approximately 10 12 Gy/s). Absorption spectra show that the main absorption band increases at the expense of a shorter-wavelength precursor absorption band, showing an isosbestic point approximately midway between the two absorption bands. It was found that a certain combination of dye precursor and host plastic (namely a polyamide containing an aromatic group) constitutes a film which shows a very fast increase in optical density of the main absorption band, making it suitable for immediate dosimetric analysis in very high dose-rate installations.
Filiaciones:
Uribe R.M.:
Centro de Investigacion y de Estudios Avanzados del IPN, Apartado Postal 73, Merida 97310 Cordemex, Mexico
Barcelo M.:
Centro de Investigacion y de Estudios Avanzados del IPN, Apartado Postal 73, Merida 97310 Cordemex, Mexico
McLaughlin W.L.:
Centro de Investigacion y de Estudios Avanzados del IPN, Apartado Postal 73, Merida 97310 Cordemex, Mexico
Buenfil A.E.:
Centro de Investigacion y de Estudios Avanzados del IPN, Apartado Postal 73, Merida 97310 Cordemex, Mexico
Rios J.:
Centro de Investigacion y de Estudios Avanzados del IPN, Apartado Postal 73, Merida 97310 Cordemex, Mexico
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