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Effects of different matrixes on the dosimetric response of alpha-terthiophene films from the kgy to mgy range (Articolo in rivista)
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- Effects of different matrixes on the dosimetric response of alpha-terthiophene films from the kgy to mgy range (Articolo in rivista) (literal)
- Anno
- 2002-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/S0969-806X(01)00568-0 (literal)
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Russo M., D'Angelantonio M., Takacs E., Lavalle M., Fuochi P.G., Emmi S.S. (2002)
Effects of different matrixes on the dosimetric response of alpha-terthiophene films from the kgy to mgy range
in Radiation physics and chemistry (1993); Pergamon-Elsevier Science Ltd., Oxford (Regno Unito)
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- Russo M., D'Angelantonio M., Takacs E., Lavalle M., Fuochi P.G., Emmi S.S. (literal)
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- CNR, Ist Frae, Area Ric, I-40129 Bologna, Italy
Hungarian Acad Sci, IISC, H-1525 Budapest, Hungary (literal)
- Titolo
- Effects of different matrixes on the dosimetric response of alpha-terthiophene films from the kgy to mgy range (literal)
- Abstract
- Films of polymethylmethacrylate (PMMA) and polystyrene (PS) containing
alpha-terthiophene (3T) undergo a radiochromic effect when exposed to
electrons and gamma rays. The films turn either red-green or red, due to
the formation of oligomeric radical cations. In both matrixes, absorbance
at 465 nm grows linearly with dose when alpha-terthiophene concentration
reaches 12%. Explored range goes up to ~ 2 x 10^6 Gy, with dose rates
spanning over three orders of magnitude. Concerning their application as
dosimeters, a higher sensitivity characterises the 3T-PMMA moiety,
suggesting its suitability from the kGy range up to 1 MGy. Above this
value films become fragile. 3T-Polystyrene films are less sensitive, but
more radiation resistant. Therefore they better suit the medium-to-high
dose dosimetry range. Dose rate influences the response sensitivity in a
complex way, however above 80 and up to 3.6 x 10^4 Gy/min an approximate
linearity exists between log(dose rate) and sensitivity, as in the
analogous cellulose triacetate system. (literal)
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