Abstract:
The nuclear properties (spin, mass, life-time, magnetic moment, electric quadrupole moment and charge radius) of the ground and long-lived states of unstable nuclei can be used to explore the exotic nuclear structure phenomenon, and also will be a prominent input for the nuclear theory methods and nuclear interactions. Experimentally, we can nuclear-model independently determine the nuclear spins, magnetic moments, electric quadrupole moments and mean square charge radii simultaneously from hyperfine structure and isotope shift, measured with the interdisciplinary laser spectroscopy techniques. In recent years, with the continuous efforts, various laser spectroscopy techniques with high resolution and high efficiency have been developed in order to study the short-lived isotopes produced at the radioactive ion beam facilities with very low production yield. Here, we will introduce the basic principle of laser spectroscopy measurement and discuss in detail the various complementary laser spectroscopy techniques developed for the nuclear structure study of unstable isotopes. The advantages and disadvantages of these techniques, such as collinear laser spectroscopy (high resolution, low sensitivity), in-source laser spectroscopy (high sensitivity, low resolution), as well as collinear resonant ionization (high resolution, high sensitivity), are discussed regarding to the resolution and sensitivity, which is highly related to the application of the technique in different mass region of nuclear chart. In addition, future plan and prospect on the development of the precision laser spectroscopy techniques will be discussed, which, with the hope, will be used for nuclear physics study at the next-generation facilities constructed and planed in China.