TY - JOUR
T1 - Dark noise currents and energy resolution of CdZnTe spectrometers
AU - Nemirovsky, Y.
AU - Asa, G.
AU - Jakobson, C. G.
AU - Ruzin, A.
AU - Gorelik, J.
N1 - Funding Information:
The research was supported by the Kidron Foundation and was performed in the laboratories donated by Etia and Miguel Meilichson.
PY - 1998/6
Y1 - 1998/6
N2 - The effect on energy resolution of dark noise currents experimentally observed in state of the art CdZnTe spectrometers is quantitatively analyzed. Expressions for the energy resolution determined by shot noise, generation-recombination noise, and 1/f noise are discussed in turn and are compared with the linewidth due to incomplete charge collection. The effect of the dark noise upon energy resolution is directly measured by monitoring the broadening of peaks provided by a pulser, due to biased, non-irradiated CdZnTe spectrometers that are connected in parallel. The noise characteristics of the spectrometers under study were measured separately and their dominant noise mechanism is characterized. In this manner, the effect on resolution of the dark noise is correlated not only with the dc value of the dark current but also with the noise spectral behavior which is determined by the noise mechanism.
AB - The effect on energy resolution of dark noise currents experimentally observed in state of the art CdZnTe spectrometers is quantitatively analyzed. Expressions for the energy resolution determined by shot noise, generation-recombination noise, and 1/f noise are discussed in turn and are compared with the linewidth due to incomplete charge collection. The effect of the dark noise upon energy resolution is directly measured by monitoring the broadening of peaks provided by a pulser, due to biased, non-irradiated CdZnTe spectrometers that are connected in parallel. The noise characteristics of the spectrometers under study were measured separately and their dominant noise mechanism is characterized. In this manner, the effect on resolution of the dark noise is correlated not only with the dc value of the dark current but also with the noise spectral behavior which is determined by the noise mechanism.
KW - CdZnTe
KW - Noise currents
KW - X-ray and γ-ray detectors
UR - http://www.scopus.com/inward/record.url?scp=0041476487&partnerID=8YFLogxK
U2 - 10.1007/s11664-998-0056-9
DO - 10.1007/s11664-998-0056-9
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AN - SCOPUS:0041476487
SN - 0361-5235
VL - 27
SP - 800
EP - 806
JO - Journal of Electronic Materials
JF - Journal of Electronic Materials
IS - 6
ER -