|
PURPOSE
The semiconductor alpha radiation spectrometer SEA-13P is designed for measuring
alpha energy spectra, identifying alpha-active nuclides, and determining their
concentration in environmental samples prepared by radiochemical separation
and directly in samples of aerosol discharges into the atmosphere and production
area air samples taken from AFA-RSP-20 type aerosol filters without their radiochemical
treatment
APPLICATION
- At nuclear-physics centres for research in various fields of fundamental and applied physics
- At radiochemical laboratories of factories for controlling production processes
- At laboratories of external radiation monitoring departments of factories for controlling environmental objects
- at radiological laboratories of the State Sanitary and Epidemiological Inspection, veterinary and agricultural services for
controlling he quality of centralized and noncentralized water supply, livestock farming products, and soils
COMPONENTS
- Measurement chamber unit of the alpha spectrometer with a semiconductor
detector (the detector area from 450 to 3000 mm2 is to be ordered
by the customer) and with a buil-in ADC (for
SEA-13P1)
- Amplitude-to-digital converter ADC-8К-W1
(for SEA-13P
- Applied software for Windows -"LSRM"
- Personal computer with printer
- Vacuum pump
OPERATION
Operation of the spectrometer is based on conversion of the energy of alpha-particles, which hit the semiconductor detector
located in the vacuum chamber, into electric pulses of proportional amplitude with their subsequent recording and analysis
TECHNICAL DATA
| Detectable energies, MeV |
3,5 – 9,0 |
| Number of analyzer channels |
4096 |
| Time to get ready for operation, min |
45 |
| Integral nonlinearity in the working range of alpha energies, keV |
10 |
| Background in the energy range from 3.5 to 6.0 MeV, pulse/s |
0,003 |
| Time instability over the period of continuous operation, keV |
10 |
| Maximum statistical input intensity, pulse/s |
10000 |
| Continuous operation time, h |
8 |
| Characteristic |
Rated value |
Energy resolution for the 5156-keV line from the 239Pu source
of the
OSAI set placed at a distance of 50 mm from the alpha detector of
size:
450 mm2
1000 mm2
2000 mm2
3000 mm2 |
35 keV
50 keV
70 keV
80 keV |
Absolute detection efficiency for the 5156-keV line from the 239Pu
source
of the OSAI set placed at a distance of 5 mm from the alpha detector
of size:
450 mm2
1000 mm2
2000 mm2
3000 mm2 |
20%
25%
30%
35% |
- The maximum diameter of the sample measured is 70 mm
- The range of sample-detector distances is 5–50 mm with a step of 5 mm
- Power consumption, ac 220 V, 50 Hz, is 500 W
OVERALL DIMENSIONS AND WEIGHT OF THE MAIN COMPONENTS
|
Measurement chamber unit
of alpha spectrometer |
ADC-8К-W1
(for SEA-13P1) |
Vacuum pump NVR-1,25D |
| Overall dimensions, mm |
350х180х250 |
180х110 |
136х340х90 |
| Weight, kg
|
7,5 |
0,3 |
10 |
SOFTWARE
Software ADA (Alpha Decay Analysis)
CERTIFICATES
The instrument is enrolled in the State Register of Measuring Devices under
№ 15293-96.
|
