Positron annihilation in gold between 27 K and 592 K

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 27 to 592 K. 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. (author)