Experimental Investigations of Muonic X-Ray Transitions in Mercury Isotopes

Muonic x-ray spectra have been measured for six Hg isotopes with mass numbers 198, 199, 200, 201, 202, and 204. From the measurements we have determined the half-density radii c of the monopole charge distributions assuming a Fermi-like function. In the even isotopes we have extracted the spectroscopic quadrupole moments (Qs) of the 2+ nuclear states. In 199Hg we have determined Qs (I) and B(E2;1/2-→I-) for the 158 keV (I=5/2) and 208 keV (I=3/2) nuclear states. In 201Hg the ground state spectroscopic moment Qs (3/2-) was obtained. The analysis of the other E2 moments in 201Hg is contingent on the improved knowledge of the nuclear level structure. Isotope shifts have been determined and analyzed in terms of δRk and are compared to e- x-ray and optical IS measurements. We present evidence of the E1 excitation of a 5.65 MeV - nuclear state in 202Hg.