Laser-based methods for ultrasensitive trace-isotope analyses

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Abstract
An overview of experimental approaches to sensitive and selective trace analysis of long-lived radioactive isotopes is given, emphasizing methods based upon laser spectroscopy techniques. Two such laser-based methods, resonance ionization mass spectrometry and atom trap trace analysis, have recently demonstrated high sensitivities and selectivities which are comparable to those of more mature methods such as accelerator mass spectrometry and low level counting. The analysis of long-lived radioactive isotopes has been used for a variety of applications in a broad range of scientific and technological fields and is steadily gaining importance. The development of these new laser-based methods can enhance our analysis capability and further expand the area of applications.

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