Nuclear energy level service life measuring device

Abstract

The invention relates to a nuclear energy level service life measuring device comprising a base plate, a movable platform, a target membrane support, a resistance membrane support, two pairs of Lemo vacuum adapters and platform vacuum adapters, a target membrane flattening structure and a resistance membrane flattening structure. The lower half portion of the movable platform is fixedly connected to the upper surface of the base plate, the target membrane support is fixedly connected to the upper half portion of the movable platform, the resistance membrane support is fixedly connected to the upper surface of the base plate and parallel to the target membrane support, the resistance membrane support is insulated from the base plate, the target membrane flattening structure is fixedly connected to the target membrane support and insulated from the same, the resistance membrane flattening structure is connected to the resistance membrane support, the two pairs of Lemo vacuum adapters and platform vacuum adapters are symmetrically arranged on the base plate in a penetrating manner and disposed on two sides of the movable platform, and the vacuum adapters are arranged on the lower surface of the base plate in a penetrating manner. According to the technical scheme, the distance between the target membrane and the resistance membrane can be measured accurately, the nuclear energy level service life measuring device has the advantages of stable structure and good sealing performance, is convenient to process and assembly, is skillful in the overall structure and is light.

Description

technical field [0001] The invention belongs to the field of atomic nuclei, and in particular relates to a measuring device for atomic nucleus energy level lifetime. Background technique [0002] The basic principles of the measuring device for atomic nuclear energy level lifetime are as follows: [0003] Such as Figure 6 As shown, when the moving excited state nucleus emits γ photons, the energy of the γ photons will shift due to the Doppler effect. By measuring the flight distance of the recoil nucleus, the average lifetime of the excited state can be determined. When the incident ion beam bombards the target membrane 21, the recoil nuclei generated by the nuclear reaction will break away from the target membrane and fly in a vacuum with a speed v. At this time, if the recoil nuclei are de-excited and emit γ photons at an angle of θ with the direction of motion, then The gamma photon energy E received by the detector 23 fixed in the θ angle direction γ There will be a l...

AI Technical Summary

Problems solved by technology

[0017] The common defect of the above-mentioned existing devices is that the measurement accuracy of the absolute distance between the target film and the stopper film is not high, generally in the order of microns

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