P. Villemoes et Mq. Wang, HYPERFINE-STRUCTURE OF THE 4-F(7)-(8S0)-6S-7S30 LEVEL IN EU-151,EU-153 II BY FAST-ION BEAM - LASER SPECTROSCOPY, Zeitschrift fur Physik. D, Atoms, molecules and clusters, 30(1), 1994, pp. 19-22
The hyperfine structure (hfs) of the level 4f7(S-8(0)) S-7(3)0 in Eu-1
51, Eu-153, II has been measured with collinear fast ion beam - laser
spectroscopy. The hfs of the S-7(3)0 level has been measured with inte
rferometric methods previously but, to our knowledge, this is the firs
t measurement with the laser ion beam technique. In the present experi
ment the hfs of the 4f7(S-8(7/2)0) 6p1/2 levels were also obtained. Co
rresponding magnetic dipole and electric quadrupole coupling constants
A and B are evaluated.