Recent status of research on optical isotope shifts of unstable nucleides, and expectation for electron scattering

Iimura, Hideki  

So far the measurements of isotope shifts by laser spectroscopy is the only method to determine the nuclear charge radii. However, in order to deduce the nuclear charge radii, the atomic factor must be known. It is difficult to calculate the atomic factor precisely, and this causes some uncertainties for nuclear charge radii. Recently the world first facility for electron scattering for unstable nuclei, SCRIT, has become operational. It is expected that the elastic electron scattering data by SCRIT can improve precision of the nuclear charge radii in combination with the isotope shift data. In this presentation, present status of laser spectroscopy for unstable nuclei is reviewed, and the program which should be undertaken at SCRIT will be discussed.