P. Ferger et al., CRYOGENIC PARTICLE DETECTORS WITH SUPERCONDUCTING PHASE-TRANSITION THERMOMETERS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 370(1), 1996, pp. 157-159
A tungsten superconducting phase transition thermometer on a 32 g sapp
hire crystal has given an energy resolution of 100 eV (FWHM) for 1.5 k
eV X-rays, increasing to 440 eV at 14 keV. A possibility to obtain sim
ilar resolution in much larger crystals by using Al films as phonon co
llectors is presented.