The temperature dependence of the positron annihilation parameters in bismuth can be explained as an effect of thermal expansion of the samples. No effect of trapping of positrons in vacancies, nor any prevacancy effect is observed.
The temperature dependence of the positron annihilation parameters in bismuth can be explained as an effect of thermal expansion of the samples. No effect of trapping of positrons in vacancies, nor any prevacancy effect is observed.
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