Positron annihilation in gold between 27K and 592K

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Abstract
The temperature dependences of the Doppler-broadening lineshape parameter W and the positron lifetime have been measured for positron annihilation taking place in Au in the prevacancy temperature range 27K to 592K. The results are consistent with a linear temperature dependence of these annihilation parameters. It is suggested that this observation represents correctly the intrinsic behaviour of the positron in the Au lattice. The results are compared with earlier work over similar temperature ranges, which has shown additional contributions to these annihilation characteristics.