On low-energy tail distortions in the detector responsefunction of x-ray microcalorimeter spectrometers
physics.ins-det
/ Authors
G. C. O'Neil, P. Szypryt, E. Takacs, J. N. Tan, S. W. Buechele, A. S. Naing, Y. I. Joe, D. Swetz, D. R. Schmidt, W. B. Doriese
and 5 more authors
J. D. Gard, C. D. Reintsema, J. N. Ullom, J. S. Villarrubia, Yu. Ralchenko
/ Abstract
We use narrow spectral lines from the x-ray spectra of various highlycharged ions to measure low-energy tail-like deviations from a Gaussian responsefunction in a microcalorimter x-ray spectrometer with Au absorbers at energiesfrom 650 eV to 3320 eV. We review the literature on low energy tails in othermicrocalorimter x-ray spectrometers and present a model that explains all thereviewed tail fraction measurements. In this model a low energy tail arises fromthe combination of electron escape and energy trapping associated with Bi x-rayabsorbers.