L. Decarlan et al., DISCRETE ANALOG ELECTRONICS FOR HIGH-RESISTIVITY SILICON DETECTORS USED FOR X-RAY AND GAMMA-RAY SPECTROSCOPY IN WHOLE-BODY MONITORING, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 380(1-2), 1996, pp. 371-375
The work is aimed at developing an in vivo spectroscopy system for rad
iation protection monitoring to improve the lung detection of Pu-239 a
nd Am-241. Silicon components have been investigated for high-resoluti
on spectroscopy (2 keV) at room temperature to measure 59.5 keV Am-241
gamma rays. The requirements and constraints of such device are revie
wed. The work is focused on analog electronics and detector developmen
t. As a first step, multi-channel electronic circuits based on a low-n
oise charge-sensitive preamplifier have been built by carrying the FET
s and feedback capacitances close to the strips. The performance is pr
esented for a large-area strip silicon detector (3 x 3 cm(2)). Measure
ments are compared with simulations and discussed with respect to appl
ication requirements.