Sreepad, H. R. and Sreeramalu, V. and Chandrashekara, A. and Ravindrachary, V. and Ranganathaiah, C. and Gopal, S. (1991) Radiation Induced Changes in the Polymer PPO. A Positron Annihilation Study. Physica Status Solidi A-Applied Research, 124 (2). pp. 441-446.
Full text not available from this repository. (Request a copy)Abstract
Positron lifetime measurements are made on gamma-irradiated poly(2,6-dimethyl-1,4-phenylene oxide) films as a function of the absorbed radiation dose in the radiation dosage range (0 to 24) x 10(-5) Gy. All the measured lifetime spectra are well fitted to the three component analysis. Variations in the lifetimes and intensities of the first two components indicate that there is radiation induced molecular motions associated with the formation of free radicals. The average free volume size is calculated using the value of the o-Ps lifetime at each irradiation step. The average free volume size is calculated using the 0.162 nm3 over the absorbed radiation dose, while the number density of free volume sites is unaffected due to irradiation in the present dosage range.
| Item Type: | Article |
|---|---|
| Subjects: | D Physical Science > Physics |
| Divisions: | Department of > Physics Department of > Statistics |
| Depositing User: | Users 23 not found. |
| Date Deposited: | 11 May 2021 07:18 |
| Last Modified: | 28 Oct 2022 05:32 |
| URI: | http://eprints.uni-mysore.ac.in/id/eprint/16374 |
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