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SEA-13P1

Semiconductor alpha spectrometer.

 

Intended use

The SEA-13P1 Semiconductor alpha spectrometer is designed for measurement of energy spectrum of alpha particles, identification of alpha-active nuclides and determination of their content in measured samples of environmental objects, as well as directly in samples of aerosol emissions into the atmosphere and air of industrial premises, collected on AFA-RSP-20 aerosol filters.

 

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Description

Application

SEA-13P1 is used in nuclear physics centers for research in various fields of fundamental and applied physics, in radiochemical laboratories of enterprises for monitoring technological processes, in laboratories of external dosimetry services of enterprises for monitoring environmental objects, in radiological laboratories of the State Sanitary and Epidemiological Service, in veterinary and agricultural services for monitoring the quality of water of centralized and non-centralized water supply, animal products and soils.

Design and operation

SEA-13P1 is a single unit that includes an evacuated chamber with a silicon ion-implanted semiconductor detector, a spectrometric amplifier, a spectrometric ADC, and a power source for the spectrometer and detector.

The spectrometer also includes a vacuum pump, a personal computer with printer, and SpectraLineADA spectrometry software.

Features and functional capability

  • Samples of aerosol emissions collected on AFA-RSP-20 aerosol filters can be measured without special radiochemical treatment.
  • Samples to be measured must be prepared by electrolytic deposition
  • Samples to be measured are placed on one of ten shelves in the measuring chamber, located at distances from 5 to 50 mm from the detector in 5 mm increments.
  • Maximum sample diameter is 70 mm

Specifications and Performance

Range of registered energies

3.5 to 9.0 MeV
Background in the energy range from 3.5 to 6.0 MeV

0.003 cps max
Energy resolution of the 5156 keV line of a Pu-239 source placed at a distance of 50 mm from an alpha detector with a specified area

20 keV max (100 mm²)
25 keV max (450 mm²)
35 keV max (1000 mm²)
50 keV (3000 mm²)
Maximum statistical load

1·10⁴ cps min
Number of channels

4096 (8192)
Time instability for continuous operation period

10 keV max
Operating mode setting time

45 minutes max
Continuous operation

8 hours
Power supply

~220 V, (50±1) Hz, 500 V·A
Environmental

10 to 35 °С, 75 % at +30 °С and lower temperatures without moisture condensation
Operating geometries

measurement of samples at a distances of 5 to 50 mm from the detector in 5 mm increment
the maximum diameter of the analyzed alpha sample is 70 mm
Dimensions

(350×180×250) mm (alpha spectrometer unit)
Weight

7.5 kg (alpha spectrometer unit)

Certification

Certification

  • SEA-13P1 is registered in the State Register of Measuring Instruments under No. 15293-09
  • SEA-13P1 complies with the requirements of the Technical Regulations of the Customs Union on safety of low voltage equipment (TR CU 004/2011), Technical Regulations of the Customs Union on electromagnetic compatibility of technical means (TR CU 020/2011)

Measurement procedures

  • Method for measuring the activity of radionuclides in countable samples on alpha spectrometers using SpectraLine software. Number in the Federal Information Fund for Ensuring the Uniformity of Measurements is FR.1.38.2022.42800

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