Cryogenic detectors below 100 mK for X-ray measurements in metrology
Due to the intrinsic performances of cryogenic detectors such as energy resolution, LPRI has decided to use these devices to improve the quality of the radioactive measurements usually obtained with classical semiconductor detectors. A bolometer with a 10 microg tin absorber has been developed at IAS (Institut d'Astrophysique Spatiale) and has been tested in the cryogenic installation of LPRI; an energy resolution (full width half maximum, FWHM) of 39 eV has been obtained on the Kalpha line of Mn. Besides these good spectrometry results, an absolute activity measurement using bolometers is proposed by adapting an absorber geometry for 4 pi counting.
Bobin
C
Bureau National de Metrologie, Laboratoire Primaire des Rayonnements Ionisants, CEA/DAMRI, B.P. 52, Gif-sur-Yvette, France.
Leblanc
E
Bouchard
J
Coron
N
Cassette
P
Leblanc
J
de Marcillac P
Plagnard
J