Laser spectroscopy has been used to measure the isotope shifts of 146Ce and 148Ce relative to 144Ce, Z = 58. The new data, in combination with existing optical data on the stable isotopes and radioactive 144Ce isotope, permits a study of charge radii variations for the even-N Ce nuclei from N = 78 to N = 90. This range covers both the N = 82 shell closure and the N = 88 shape transition region. A marked increase in deformation occurs at N = 88 for elements with Z ≥ 60 but not for those with Z ≤ 56. The new data for Ce (Z = 58) show an intermediate behaviour, resulting in a smooth increase in deformation with Z in the N = 88, 90 region.
|Number of pages||5|
|Journal||Journal of Physics G: Nuclear and Particle Physics|
|Publication status||Published - Nov 2003|
- Isotope effect; Laser spectroscopy (laser spectroscopy for isotope shifts of 146Ce and 148Ce relative to 144Ce); Nuclear charge radii (of cerium isotopes)