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Spectrometer-dosimeter SDMF-1608SN   Увеличить Цена:  87,995.00  Overview SDMF-1608SN –The neutron and gamma rays spectrometer -dosimeter is designed for measuring the spectral  neutron and gamma-rays flux density in the real time and in absolute units [neutrons * sm-2 * s-1 * MeV-1] and [gamma-quants * sm-2 * s-1 * MeV-1]. Based on the measured spectral fluence rate effective and absorbed dose rate is calculated  in a wide energy range of neutron  and gamma ray, as well as ambient equivalent dose rate. For gamma-rays, spectrometer-dosimeter also calculates the exposure and absorbed dose rate in the air. When calculating the dose characteristics, the geometry of radiation sources and irradiation conditions are taken into account.   Main features Simultaneous measurement of energy spectra of neutron and gamma ray. Measurement of neutron spectrum without  usage of bulky and heavy polyethylene moderators. Measurement of continuous (“white”) spectrum of gamma ray as well as of linear (discrete) spectrum. Measurement of fast neutron and gamma ray flux density in absolute units. Maximum load at detector input 3 х 105 pulses, which corresponds to the computable effective dose rate of 1.75 х 105 μSv/hr from 239Pu-Be source with frontal geometry. Energy resolution  of  no  more  than 2.5% for neutron with energy of 14.5 MeV and no more than  9%  for  gamma  rays  with  energy  of 661 keV (137Cs).  Application  Monitoring in nuclear facilities.  Earth physics.  Nuclear medicine.  Measurement of effective dose rate of secondary neutrons and gamma-ray at medical accelerators (LINAC).  Research in materials.  Fast neutron flux standard. Calibration of any kind of integral dosimeters of neutron and gamma radiation. Spectrometer specifications Сharacteristic Value Range of neutron energy 500 keV – 16 MeV Range of gamma rays energy 250 keV – 8 MeV Min/Max of effective dose rate from 0,2  up to 20 000 μSv/hr Long-time instability (72 h) 0,5% Average deviation from real values of neutron flux density measurement integral/differential 7%/15%  Average deviation from real values of ambient dose equivalent rate of neutron flux measurement 12% Average deviation from real values of ambient dose equivalent rate of H * (10) gamma radiation measurement +12% Energy resolution at 137Cs line (661 keV) 12% Anisotropy for neutron radiation +15% Maximum neutron fluence for scintillator (not considering restoration)  1013 n/cm2 Detector’s work load   3*10 4 pulses/s Computed dose dimensions Sv/hr, Gy/hr, Sv/s, Gy/s,  rad/s, rad/hr, R/s, R/hr  Standalone worktime (accumulator +12V)   not less than 3 hours Dimensions spectrometer, mm 415(W) x 165(L) x 360(H)   Size of detector, mm  245 x D65 Weight includes detector  10 kg                                                           - Data sheet of the spectrometer-dosimeter SDMF-1608SN    - Article: "Measuring the monoenergetic neutron flux density using the SDMF-1608SN spectrometer-dosimeter in the radiation fields of the PTB ion accelerator complex (PIAF), Germany"    - Article on the use of a spectrometer to measure the total neutron cross section of radiation-protective materials (polyethylen with TiH2 and B4C)   - Article:"Study of radiation-protective characteristics of polyethylene composites with B4C and Bi2O3 to neutron and gamma radiation"  - Article:"Investigation of radiation-protective characteristics of a polyethylene composite with samarium oxide to neutron and gamma radiation (Sm2O3)"  - Article:"How to Correctly Calculate the Dose Rate, or the Fundamental Limitations of Integral Dosimeters"