Author/Authors :
Ishisaki، نويسنده , , Y and Morita، نويسنده , , U and Koga، نويسنده , , T and Shinozaki، نويسنده , , K and Sato، نويسنده , , K and Takai، نويسنده , , N and Ohashi، نويسنده , , T and Arakawa، نويسنده , , T and Kudo، نويسنده , , H and Sato، نويسنده , , H and Kobayashi، نويسنده , , H and Izumi، نويسنده , , T and Ohtsuka، نويسنده , , S and Mori، نويسنده , , K and Shoji، نويسنده , , S and Osaka، نويسنده , , T and Homma، نويسنده , , T and Mitsuda، نويسنده , , K and Yamasak، نويسنده ,
Abstract :
Performance of microcalorimeters with a Ti/Au transition-edge sensor (TES) and an electrodeposited absorber has been investigated. The absorbers are in a mushroom-shape made of Sn or Bi. With an Sn absorber we observed a long time scale component of 1.8 ms for X-ray pulses, which is due presumably to recombination of quasiparticles into phonons. As a result, the energy resolution is not good with the Sn absorber. Better energy resolution of 28±1 eV was obtained with an incomplete-shaped Bi absorber, although the long component was also seen with smaller level. A calorimeter with only a neck of the Au seed layer for the electrodeposition had the best energy resolution of 6.3±0.4 eV in spite of saturated pulses and relatively high transition temperature of 210 mK.
