Reliable, with one-point correction of energy scale
Comment:
The sample was prepared from corresponding tetrathiometallates ammonia by decomposition in vacuum by heating to 523 K. The surface was cleaned by Ar+ ion bombardment (Ep = 800 eV, Ip = 20 mA, time = 3 - 5 min). The intensity ratio of the high energy/low energy components was 0.30.