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E-mail
18721931244@139.com
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Phone
18721931244,18913087693
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Address
Room 1441, Zone F, No. 40, Lane 689, Luofen Road, Baoshan District, Shanghai
Bojiang Environmental Protection Technology (Shanghai) Co., Ltd
18721931244@139.com
18721931244,18913087693
Room 1441, Zone F, No. 40, Lane 689, Luofen Road, Baoshan District, Shanghai
The core difference between portable neutron dose rate meters and portable X/γ dose rate meters lies inThe types of radiation monitored are differentThis leads to differences in detector principles, structural design, and applicable scenarios.
| monitoring target | Neutron radiation (covering a wide spectral range of thermal neutrons, fast neutrons, etc.) | X-rays, gamma rays (high-energy electromagnetic radiation) |
| Core principle of detector | The detection is achieved through the nuclear reaction between neutrons and specific substances. Common types of detectors include:1. Proportional counter tube (such as BF ∝ proportional tube, where neutrons react with ¹⁰ B to produce charged particles)2. Scintillation detector (such as Li glass scintillator, where neutrons react with ⁶ Li to produce fluorescent signals)Moderators (such as polyethylene) are required to slow down fast neutrons into thermal neutrons, thereby improving detection efficiency | Using the ionization or excitation effects of radiation for detection, common types of detectors include:1. Geiger Miller counter tube (GM tube, producing electrical pulses from ionized gas)2. Scintillation detector (such as NaI (Tl) scintillator, excited to produce fluorescence)3. Ionization chamber (collecting ionization generated charges with higher accuracy) |
| Anti interference design | It is necessary to shield against gamma ray interference (such as installing a lead shielding layer) to avoid false triggering of counting by gamma rays and ensure the accuracy of neutron measurement | Not sensitive to neutrons, no need for specialized anti neutron interference design; Some high-precision models need to consider the impact of environmental background radiation |
| Energy response characteristics | The energy response range is wide (usually from thermal neutrons to 15 MeV fast neutrons), and the material and thickness of the moderator determine the energy coverage capability | The energy response to X/γ rays needs to be flat, with small differences in detection efficiency between different energy rays to ensure accurate dose measurement |
| Applicable scenarios | Neutron source application sites (such as industrial non-destructive testing, neutron therapy equipment), nuclear reactor surroundings, emergency neutron monitoring for nuclear accidents, neutron physics experimental sites | X/gamma ray inspection site, radioactive isotope laboratory, nuclear medicine discipline, radiation diagnosis and treatment department, nuclear facility gamma radiation inspection, environmental gamma background monitoring |
| Reading meaning | Neutron dose rate (such as μ Sv/h, mSv/h) reflects the dose equivalent of neutron radiation to the human body | X/gamma radiation dose rate (such as μ Sv/h, mSv/h), reflecting the dose equivalent of X/gamma radiation to the human body |