GAMMA-1P is used in laboratories of external dosimetry services, environmental services, radiological laboratories of concerned ministries and departments to control various environmental samples for the presence of gamma-emitting radionuclides, also in radiochemical laboratories to control technological processes. The spectrometer can be used in nuclear physics centers for research in various areas of fundamental and applied physics.
Design and operation
GAMMA-1P includes a semiconductor detecting unit, a spectrometric device, a lead protective shield, an operator’s workstation.
The semiconductor detecting unit converts the energy of gamma rays into electrical signals proportional in amplitude for their subsequent processing. The type of the semiconductor detector is selected to meet the customer’s specifications.
The spectrometric device is used to receive spectrometric information from the semiconductor detector. The choice of a specific model of the spectrometric device is determined by the tasks and needs of the customer.
The lead protective shield reduces the level of the external gamma background recorded by the semiconductor detector thus increasing the spectrometer sensitivity. Whereas the most common solution for GAMMA-1P is the Ekran-2P protective shield (stationary floor shield of the original design, lead shield thickness is 82 mm, copper is 1.5 mm, cadmium is 1 mm), other models varying in lead thickness, measuring chamber volume, special features like collimator, are available. For some applications, such as high activity samples, there may be no need for a shield.
The operator’s workstation with installed specialized software allows you to manage accumulation, display, processing of information and output of processing results to external devices. The basic software for GAMMA-1P is SpectraLineGP. SpectraLine Handy or SpectraLine Ultimate can be used instead. NuclideMaster, NuclideMasterPlus, EffMaker are used as additional software that expands the range of tasks to be solved.
GAMMA-1P can come with various accessories: containers and devices for sample measurements, positioning devices, devices for filling the detector with liquid nitrogen, and a desk for equipment.
- The spectrometer composition depends on the tasks, needs and capabilities of the customer.
- Efficiency calibration of the spectrometer is done for a point 5 cm, point 25 cm, and 1 l Marinelli vessel geometries. Calibrations using other geometries are also possible upon the customer’s request.
- The detector is characterized to correct the radionuclide library for true summation.