Title :
Large-Area Microcalorimeter Detectors for Ultra-High-Resolution X-Ray and Gamma-Ray Spectroscopy
Author :
Bacrania, M.K. ; Hoover, A.S. ; Karpius, P.J. ; Rabin, M.W. ; Rudy, C.R. ; Vo, D.T. ; Beall, J.A. ; Bennett, D.A. ; Doriese, W.B. ; Hilton, G.C. ; Horansky, R.D. ; Irwin, K.D. ; Jethava, N. ; Sassi, E. ; Ullom, J.N. ; Vale, L.R.
Author_Institution :
Los Alamos Nat. Lab., Los Alamos, NM, USA
Abstract :
We discuss recent developments in using cryogenic microcalorimeter detectors for x- and gamma-ray spectroscopy. We are currently operating a detector array consisting of thirteen pixels with time-domain multiplexed readout. With a single pixel from this detector, we have measured 97.43-keV gamma rays from 153-Gd with 22-eV resolution (FWHM). We have also made the first multiplexed array measurements of plutonium x- and gamma-rays with 45-eV resolution. We are currently testing a 66-pixel next-generation detector chip. Preliminary measurements with the new detector indicate improved energy linearity and single-pixel energy resolution of 50-100 eV at 100 keV. We present preliminary calibration data from this chip, and a high-statistics multiplexed 21-pixel spectrum of the Pu x-ray region between 90 and 130 keV.
Keywords :
X-ray spectroscopy; calibration; cryogenics; gamma-ray spectroscopy; particle calorimetry; position sensitive particle detectors; time-domain analysis; calibration data; cryogenic microcalorimeter detector; electron volt energy 50 eV to 100 eV; electron volt energy 90 keV to 130 keV; gamma-ray spectroscopy; high-statistics multiplexed 21-pixel spectrum; large-area microcalorimeter detector; single-pixel energy resolution; time-domain multiplexed readout; ultra-high-resolution X-ray spectroscopy; Cryogenics; Energy resolution; Gamma ray detection; Gamma ray detectors; Semiconductor device measurement; Sensor arrays; Spectroscopy; Time domain analysis; X-ray detection; X-ray detectors;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2009.2022754
