Mixed-radiation dosimetry

Briskman, B. A.; Novgorodtsev, R.B.

doi:10.1007/bf01123101

Cited by 4 publications

(2 citation statements)

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“…As for endothermic reactions (stored energy), the real values are critically determined by the measurement error. The real values of W may be significantly lower than that noted above, for example, the energy spent for cross-linking of PE (3-3.5 eV/crosslink) is smaller than 1% of the absorbed energy [17].…”

Section: Radiation Effects On Thermal Properties Of Polymers 109mentioning

confidence: 75%

“…following is a list of the relative values of W for PE (as a percentage of the total absorbed energy) obtained in different laboratories: 3% [14], 2% [15], 3.7% [16], 0.7% [17], 4% [18] and 3.8% [19]. Weimer [18] found that in PE for doses up to 10 Gy the predominant reaction is exothermic, with a maximum heat evolution at the beginning of irradiation, which accounts for more than 20% of the absorbed energy.…”

Section: Radiation Effects On Thermal Properties Of Polymers 109mentioning

confidence: 99%

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Radiation Effects on Thermal Properties of Polymers. I. Polyethylene (contd.)

Briskman

Tlebaev

2005

High Performance Polymers

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The information about radiation effects on the thermal properties of polymeric materials is of special interest as: (1) the temperature regime of technical structural units operated in the radiation fields is determined in many respects by the values of the material thermal constants and the rate of their degradation (2) the temperature and dose dependencies of heat conductivity and, especially, heat capacity characterize the polymer structure. The data on radiation effects on the thermal conductivity, heat capacity and diffusivity, linear thermal expansion, density, degree of crystallinity, heat and temperature of phase transitions were presented in the first part of this paper [ Nucl. Instr. Meth. in Phys. Res. B 185 (2001) 116–122] for polyethylene of high and low density, as a well-known and typical partly-crystalline polymer that is very convenient for investigation of the radiolysis processes. This part of the review examines such problems as reversible radiation effects on heat capacity, analytical models of the radiation-induced changes and anisotropy effects on the thermal conductivity, accumulated radiation energy (‘heat defect’) and important problems of specific action of different kinds of radiation on the thermal properties of the polymer and dose-rate effects, especially under vacuum.

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Section: Radiation Effects On Thermal Properties Of Polymers 109mentioning

confidence: 75%

Section: Radiation Effects On Thermal Properties Of Polymers 109mentioning

confidence: 99%