Investigations of the Zeeman effect of some 142Nd ionic levels, using collinear laser ion beam spectroscopy

•Doppler-free method was used to study the weak field Zeeman effect in fast NdII ions.•We have demonstrated the usefulness of the CLIBS for studies of the Zeeman effect.•Accurate measurements of the Lande factors have been made for several levels of NdII.

By performing laser excitation from the even 4f45d lower levels to the odd 4f46p and 4f35d2 upper levels of the neodymium ion 142Nd+, we have observed Zeeman splitting in an external magnetic field up to 330 G. We applied the high resolution spectroscopic method of collinear laser ion beam spectroscopy (CLIBS). With this method (unconventional for studying the Zeeman effect) we recorded very well-resolved Zeeman structure patterns with line widths of order of 100 MHz, which is only sometimes the natural line width. The obtained experimental Landé factors are compared with earlier measurements and with theoretical calculations.