QUANTITATIVE-EVALUATION OF THE INTRINSIC X-RAY PEAK PROBABILITY OF A SUPERCONDUCTING TUNNEL JUNCTION WITH THE CASCADE PROCESS MODEL OF PRIMARY PHOTOELECTRONS
M. Ukibe et al., QUANTITATIVE-EVALUATION OF THE INTRINSIC X-RAY PEAK PROBABILITY OF A SUPERCONDUCTING TUNNEL JUNCTION WITH THE CASCADE PROCESS MODEL OF PRIMARY PHOTOELECTRONS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 402(1), 1998, pp. 95-103
The electron collision cascade process of primary photoelectrons gener
ated by absorbed X-rays was studied to develop a clear model of the si
gnal producing process of a superconducting tunnel junction (STJ), and
the intrinsic peak probability P-1 of the STJ was calculated as a fun
ction of X-ray energy. X-rays of 5-18 keV were measured by a 178 mu m
x 178 mu m Nb/Al-AlO2/Al/Nb STJ with the Nb electrode thickness of 200
nm and P-1 was experimentally obtained. The calculated P-1 agreed wel
l with the measured one for the range of X-ray energies of 5-12 keV. T
he numerical evaluation of P-1 with this model reveals that the increa
ses of the electrode thickness is effective to increase P-1.