Gamma Spectrometer ORTEC GMX20-70-CW

Model:   ORTEC GMX20-70-CW
Serial number:   61-N24514A
Cryostat model:   CFG-SV-70
Carbon window:   0.9 мм
Crystal parameters:   60 mm in length, 50 mm in diameter, N-type
Relative efficiency:   22% 

Energy range:   from 3 keV and above 
(measured with $^{55}Fe$, calibrated with $^{241}Am$)
Energy resolution:   $FWHM_{1332 keV}$ $^{60}Co$ = 1.85 keV
High-voltage supply:   minus 3400 V
Cooling:   liquid nitrogen