The portable radiometer for gamma and neutron radiation is applied in nuclear power engineering, in the production of isotopes at reactors and accelerators, during the storage of radioactive waste, etc. It is suitable for use in the energy sector for assessing the degree of natural gas filling in gas storage facilities, in geophysical measurements for simultaneously performing neutron and neutron-gamma logging in boreholes during geological explorations, in the field of ecology for environmental and water monitoring, etc. It allows localizing the radiation source, determining its type, and working in a wide temperature range in various operating modes - with and without the presence of a computer. The portable radiometer for gamma and neutron radiation consists of a spectrometric detector for gamma radiation (1g) and a spectrometric detector for neutron radiation (1n). The gamma radiation detector (1g) is positioned coaxially in a channel on the surface of a neutron moderator (13), and the neutron radiation detector (1n) is located in a channel along the axis of the neutron moderator (13). Each of them is connected to respective charge-sensitive preamplifiers (2g and 2n), the outputs of which are connected to respective shaping amplifiers (3g and 3n), and their outputs are in turn connected via a pulse mixer (5) to a peak detector (7). The input of a single-channel pulse analyzer (6) is connected to the pulse mixer (5) and to the peak detector (7). The input of a single-channel pulse analyzer (6n) is connected to the pulse mixer (5) and to the neutron shaping amplifier (3n). The outputs of the single-channel pulse analyzers (6 and 6n), as well as the output of the peak detector (7), are connected to a single-chip microcontroller with a built-in 12-bit analog-to-digital converter (8). High-voltage power supplies (4g and 4n) are connected respectively, on the one hand, to the gamma and neutron radiation detectors (1g and 1n), and on the other hand - to the single-chip microcontroller with a built-in 12-bit analog-to-digital converter (8), which is connected to a light and sound signaling unit (9) and a battery (10). All of these are housed in a casing (14). The single-chip microcontroller with a built-in 12-bit analog-to-digital converter (8) is connected via an interface converter (11) to a computer (12). 4 claims, 3 figures.
