Isotope identifierIt is a high-sensitivity nuclear radiation detection device used for rapid and non-destructive detection and identification of radioactive nuclide types and their activities. It is widely used in fields such as nuclear safety, environmental monitoring, customs inspection, emergency response, medical radiation management, and nuclear science research. Its core function is to accurately determine the types of radioactive isotopes present in the sample or environment, such as uranium-235, plutonium-239, cesium-137, cobalt-60, iodine-131, etc., by analyzing the energy spectrum characteristics of gamma rays (sometimes including neutrons).

This instrument is typically constructed based on scintillation/semiconductor detectors such as high-purity germanium (HPGe) or sodium iodide (NaI (Tl)). Among them, HPGe detectors have high energy resolution and can accurately distinguish gamma ray peaks with similar energies, making them suitable for precise identification in complex nuclide mixing scenarios; The NaI (Tl) detector, on the other hand, has lower cost, smaller size, and higher efficiency, making it suitable for rapid on-site screening. Modern isotope identification instruments generally integrate multi-channel pulse amplitude analyzers (MCAs), built-in nuclide libraries (containing hundreds of common radioactive nuclides), automatic spectral analysis algorithms, and GPS/communication modules, which can complete nuclide matching, activity estimation, and alarm prompts within seconds to minutes.

　　Isotope identifierThe core detection module

1. Radioactive source (applicable to some instruments)

Function: Release specific types of nuclear radiation (such as alpha, beta, gamma rays) as a detection signal source.

Characteristics: Different types of radioactive sources are selected according to the detection requirements. For example, beta radioactive sources are often placed in aluminum boxes, while gamma radioactive sources are packaged in iron or lead cans to ensure safety protection.

Application scenarios: Industrial thickness gauges, density gauges, etc. achieve non-contact detection by measuring the intensity changes after radiation penetrates the sample.

2. Ion source (core of mass spectrometry instruments)

Function: Ionize sample molecules into charged ions (such as removing electrons through electron bombardment to form positive ions).

Features: Adjustable acceleration voltage (up to 10kV), optimized electrode parameters to improve ion transport efficiency.

Application scenario: In isotope mass spectrometry, the ion source is a key step in converting sample molecules into analyzable ions.

3. Quality analyzer (core of mass spectrometry instruments)

Function: Separate based on ion mass to charge ratio (m/z).

Types: including magnetic analyzers (curvature radius of tens to hundreds of millimeters, ion transport efficiency up to 100%), time-of-flight analyzers, etc.

Application scenario: By controlling the trajectory of ions through magnetic or electric fields, separation of ions of different masses can be achieved.

4. Detector

Function: Receive separated ion or radiation signals and convert them into electrical signals.

Types: Faraday cup (receiving DC signals), electron multiplier (enhancing weak signals), Daly detector (high sensitivity detection), etc.

Application scenario: Select different types of detectors according to detection requirements, such as multiple Faraday cups in mass spectrometers that can simultaneously detect multiple ions.