Recent results on neutron rich tin isotopes by laser spectroscopy

Laser spectroscopy measurements have been performed on neutron rich tin isotopes using the COMPLIS experimental setup. The nuclear charge radii of the even-even isotopes from A=108 to 132 are compared to the results of macroscopic and microscopic calculations. The improvements and optimizations needed to perform the isotope shift measurement on $^{134}$Sn are presented

Large odd-even radius staggering in the very light platinum isotopes from laser spectroscopy

Laser spectroscopy measurements have been carried out on very-neutron-deficient platinum isotopes with the COMPLIS experimental setup. Using the 5d96s3D3→5d96p3P2 optical transition, hyperfine spectra of 182,181,180,179,178Pt and 183Ptm were recorded for the first time. The variation of the mean square charge radius between these nuclei, the magnetic moments of the odd isotopes, and the quadrupole moment of 183Ptm were thus measured. A large deformation change between 183Ptg and 183Ptm, an odd-even staggering of the charge radius, and a deformation drop from A=179 are clearly observed. Comparisons are made with microscopic theoretical predictions, in particular Hartree-Fock-Bogoliubov calculations using the Gogny force. (APS

Charge radius change in the heavy tin isotopes until A = 132 from laser spectroscopy

Laser spectroscopy measurements have been carried out on the very neutron-rich tin isotopes with the COMPLIS experimental setup. Using the $5s^25p^2~^3P_0\rightarrow 5s^25p6s~^3P_1$ optical transition, hyperfine spectra of ^{126\mbox{-}132}Sn and ^{\rm 125m,127m,129m\mbox{-}131m}Sn where recorded for the first time. The variation of the mean-square charge radius ($\delta\langle r^2\rangle$) between these nuclei and nuclear moments of the isomers and the odd isotopes were thus measured. An odd-even staggering which inverts at $A=130$ is clearly observed. This indicates a small appearance of a plateau on the $\delta\langle r^2\rangle$ which has to be confirmed by measuring the isotope shift beyond $A=132$