Title :
Output signal from Nb-based tunnel junctions by irradiation of 6 keV X-rays
Author :
Ishibashi, K. ; Mori, K. ; Takeno, K. ; Nagae, T. ; Matsumoto, Y. ; Takada, S. ; Nakagawa, H. ; Akoh, H.
Author_Institution :
Dept. of Nucl. Eng., Kyushu Univ., Fukuoka, Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
Large-size tunnel junctions with a Nb-Al-AlOx-Nb structure have been fabricated in order to study their performance in X-ray detection. The junction detected 5.9-keV X-rays with an energy resolution of 1 keV. The output signal was analyzed by the use of coupled Boltzmann equations. The method based on these equations clarifies the basic behavior of the quasiparticles and phonons, and the average energy for producing a single electron is 3.2 Δ
Keywords :
X-ray detection and measurement; alumina; aluminium; niobium; superconducting junction devices; 6 keV; Nb-Al-AlOx-Nb; X-ray detection; coupled Boltzmann equations; energy resolution; phonons; quasiparticles; Electrons; Energy resolution; Equations; Josephson junctions; Niobium; Phonons; Radiation detectors; Superconducting epitaxial layers; Tin; X-ray detection;
Journal_Title :
Magnetics, IEEE Transactions on
