Abstract
The effect of competition between electron and hole channels of tunneling on the quasiparticle multitunneling in STJ-detectors is considered. The formulae for the mean value, the variance and the relative variance of the detector signal for general case Δ 1 ≠ Δ 2 are given. For a symmetric junction the tunneling rates and the probabilities of quasiparticle tunneling as an electron and as a hole, the mean value of the transferred charge and the noise G-factor were calculated as a function of the junction bias voltage. The results of the calculations demonstrate the considerable effect of the competition between the electron and the hole channels of tunneling on the signal and the energy resolution at the bias voltages that satisfy the condition V b ⩽ | Δ 1 − Δ 2|/ e + k BT .
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