Double-barrelled accordance cylindrical flow-gas proportional counter tube

Abstract

The present invention discloses a double-barrelled accordance cylindrical flow-gas proportional counter tube. The tube comprises a cylindrical tube body which is internally provided with an upper cavity and a lower cavity, an isolating membrane is configured to separate the upper cavity from the lower cavity, only obstructs [Alpha] particles and does not obstruct [Beta] particles, the isolating membrane is provided with an air vent hole, a sample room is arranged in the lower cavity, and an upper copper cavity and a lower copper cavity are respectively connected with ventilation interfaces; and the cylindrical tube body is earthed, the upper cavity and the lower cavity are internally provided with anode wires, and the upper cavity and the lower cavity respectively output mutually independent pulse signals at the normal work state. The problems are solved that a traditional flow-gas proportional counter tube is high in housing background and bad in resolution ratio, and [Alpha] and [Beta] perform mutual crosstalk when the total [Alpha] activity and the total [Beta] activity are measured at the same time.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detectors, in particular to a double-tube conforming cylindrical gas flow proportional counter tube, which is mainly used for total alpha and total beta radioactivity measurement of low-background alpha and beta counters. Background technique [0002] Low background α, β counter is a precision instrument for measuring low-level α, β radioactive intensity, mainly composed of main detector, anti-coincidence detector, low background lead chamber and electronic circuit. There are three types of main detectors for the existing low-background α and β counters: double scintillation detectors, gas flow proportional counters and semiconductor detectors. Among them, the gas-flow proportional counter is a single-tube cylindrical gas-flow proportional counter tube, which has high background of the shell, poor resolution, and the problem of crosstalk between α and β when measuring the total α and tot...

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Problems solved by technology

[0003] Aiming at the problems in the prior art, the object of the present invention is to provide a double-tube air-flow proportional counter tube conforming to a cylindrical shape, so as to solve the problem of the single-tube air-flow proportional counter tube in the prior art, which has a high background of the shell and its own Low energy resolution, and the problem of crosstalk between α and β when measuring α and β rays at the same time

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