Eliminating the non-Gaussian spectral response of X-ray absorbers for transition-edge sensors

被引：35

作者：

Yan, Daikang ^{[1
,2
]}

Divan, Ralu ^{[1
]}

Gades, Lisa M. ^{[1
]}

Kenesei, Peter ^{[1
]}

Madden, Timothy J. ^{[1
]}

Miceli, Antonino ^{[1
]}

Park, Jun-Sang ^{[1
]}

Patel, Umeshkumar M. ^{[1
]}

Quaranta, Orlando ^{[1
,2
]}

Sharma, Hemant ^{[1
]}

Bennett, Douglas A. ^{[3
]}

Doriese, William B. ^{[3
]}

Fowler, Joseph W. ^{[3
]}

Gard, Johnathon D. ^{[3
,4
]}

Hays-Wehle, James P. ^{[3
]}

Morgan, Kelsey M. ^{[3
,4
]}

Schmidt, Daniel R. ^{[3
]}

Swetz, Daniel S. ^{[3
]}

Ullom, Joel N. ^{[3
,4
]}

机构：

[1] Argonne Natl Lab, Argonne, IL 60439 USA

[2] Northwestern Univ, Evanston, IL 60208 USA

[3] NIST, Boulder, CO 80305 USA

[4] Univ Colorado, Boulder, CO 80309 USA

来源：

APPLIED PHYSICS LETTERS | 2017年 / 111卷 / 19期

关键词：

BISMUTH THIN-FILMS; TRANSPORT-PROPERTIES; MICROSCOPY; FORMULA; METALS; LINES; TIN;

D O I：

10.1063/1.5001198

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Transition-edge sensors (TESs) as microcalorimeters for high-energy-resolution X-ray spectroscopy are often fabricated with an absorber made of materials with high Z (for X-ray stopping power) and low heat capacity (for high resolving power). Bismuth represents one of the most compelling options. TESs with evaporated bismuth absorbers have shown spectra with undesirable and unexplained low-energy tails. We have developed TESs with electroplated bismuth absorbers over a gold layer that are not afflicted by this problem and that retain the other positive aspects of this material. To better understand these phenomena, we have studied a series of TESs with gold, gold/evaporated bismuth, and gold/electroplated bismuth absorbers, fabricated on the same die with identical thermal coupling. We show that the bismuth morphology is linked to the spectral response of X-ray TES microcalorimeters. Published by AIP Publishing.

引用

页数：4

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