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Neutron Area Monitor 42-30

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The Ludlum Model 42-30H Neutron Detector is designed for detection of thermal and fast neutrons (0.025 eV to approximately 12 MeV). The neutrons are detected, not directly, but through nuclear reactions, which result in energetic charged particles such as protons and tritons.

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Indicated Use Neutron detection, area monitoring
Description  Wall mount proportional neutron detector
Moderator  25.4 cm (10.0 in.) diameter polyethylene sphere
Detection Range Thermal to approximately 12 MeV
Energy Response Approximately follows the radiation protection guide curve for neutron dose
Sensitivity Typically 20,000 cpm/mSv/h (200 cpm per mrem/hr) (AmBe)
Gamma Rejection  10 cpm or less through 0.1 Sv/h (10 R/hr)
Operating Voltage Typically 1200 V THRESHOLD
Temperature Range  -15 °C to 50 °C (5 °F to 122 °F)
Construction Polyethylene moderator with aluminum housing and mounting bracket
Size  38.1 x 25.4 x 26.2 cm (15.0 x 10.0 x 10.3 in.) (H x W x L), including bracket
Weight  8.8 kg (19.5 lb)
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BAK-2459 Neutron Area Monitor (Ludlum) 14032021

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