2020 Impact factor 3.043
Hadrons and Nuclei
Eur. Phys. J. A 15, 49-51 (2002)
DOI: 10.1140/epja/i2001-10225-9

Charge radius change in the heavy tin isotopes until $\mth{A=132}$ from laser spectroscopy

F. Le Blanc1, L. Cabaret2, J.E. Crawford3, S. Essabaa1, V. Fedoseyev4, W. Geithner5, J. Genevey6, M. Girod7, R. Horn5, G. Huber5, S. Kappertz5, J. Lassen5, J.K.P. Lee3, G. Le Scornet8, V. Mishin4, R. Neugart5, J. Obert1, J. Oms1, A. Ouchrif1, S. Peru7, J. Pinard2, H. Ravn8, B. Roussière1, J. Sauvage1, D. Verney1 and the Isolde Collaboration8

1  Institut de Physique Nucléaire, IN2P3-CNRS, 91406 Orsay cedex, France
2  Laboratoire Aimé Cotton, 91405 Orsay cedex, France
3  Physics Department, Mc Gill University, H3A2T8 Montréal, Canada
4  Institute for Spectroscopy, Troisk, Russia
5  Institut für Physik der Universität Mainz, 55099 Mainz, Germany
6  Institut des Sciences Nucléaires, Université Joseph Fourier, 38026 Grenoble cedex, France
7  Service de Physique et Techniques Nucléaires, CEA, BP 12, 91680 Bruyères-le-Châtel, France
8  CERN, 1211 Genève 23, Switzerland


(Received: 21 March 2002 / Published online: 31 October 2002)

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.

21.10.Ft - Charge distribution.
21.10.Ky - Electromagnetic moments.
31.30.Gs - Hyperfine interactions and isotope effects, Jahn-Teller effect.

© Società Italiana di Fisica, Springer-Verlag 2002