The invention discloses an element
isotope analysis
system and method based on
laser-induced
plasma. The
system comprises an
ablation laser light source, a detection
laser light source, a mobile platform, a spectrum acquisition
assembly, an
optical fiber, a
photodiode and an
oscilloscope; after the pulse of the
ablation laser light source acts on the sample, the surface of the sample is heated, evaporated and expanded, so that a small amount of substances are ejected out, a
gaseous substance is formed above the sample,
plasma is generated under the collision of free electrons and the subsequent action of the laser pulse, and after the
plasma is subjected to 1-2 microseconds, when the plasma in the
excited state jumps back to the
ground state or the number of thelow-energy-level particlesreaches the maximum, at the moment, the detection
laser light source emits a laser pulse, the specific
wavelength part of the pulse is absorbed by the
ground state or low-energy-level particles, and the intensity of the absorption peak can reflect the abundance of the specific
isotope in the sample. The detection process is non-contact, the operation is simple, the process is controllable, and the analysis result is rapid and accurate.