Deep-water Gamma-ray HPGe Spectrometer

DESCRIPTION

Deep-Water gamma-spectrometer is applicable to the registration of gamma-radiation from radionuclides in monitoring of the sea bed for objects from marine accidents, submarine storage of radioactive wastes, search of lost nuclear charges, inspection of radionuclide migration, etc.

Description

Features

  • Long-duration autonomous functioning at great depths
  • Programmable control with built-in microprocessor device
  • Independent detection and accumulation of gamma -spectra for a predetermined time
  • Recording and storage of gamma-spectra for an unlimited time period
  • Computer readable data store enables processing of accumulated data after retrieving the spectrometer

COMPLETE SET

  • HPGe coaxial detector
  • Cryostat combined with cryo-accumulator for detector cooling
  • Spectrometric device with microprocessor and data transfer devices
  • Durable waterproof housing with power supply for the spectrometer, allowing spectrometer to dive to depths of up to 1000 meters
  • External equipment for cryo-accumulator cooling and refilling with liquid nitrogen
  • Work station equipped PC with software for spectra visualization and radionuclide identification

SPECIFICATION

Parameter Value
Energy range, keV 60 – 3000
HPGe detector efficiency, % 30 *
Energy resolution for 30% efficiency detector, keV at energy
122 keV
1.33 MeV
0.9
1.9
Detection limit for specific activity of radio nuclides at measurement time1 hour, Bq/l
Cs137
Co60
Mn54
U235
Am141
0.259
0.222
0.222
0.333
7.4×10-3
Number of spectra recorded during self-contained operation 25
Maximum diving depth, m 3000
Cryoaccumulator cooling time, h 8
Continuous operation time after cryoaccumulator cooling, h 50
Weight of spectrometer without protective housing, kg 30
Weight of equipment for cryoaccumulator cooling by liquid nitrogen, kg 56
* 10% – 160% efficient HPGe detectors are available by separate order.