The g factors and quadrupole moments of the 21/2 − and 33/2 + isomers in 193 Pb have been measured by the time-differential perturbed γ-ray angular distribution method as g(21/2 −)=-0.059(11), |Q(21/2 −)| = 0.22(2) eb and g(33/2 +)=-0.171(9), |Q(33/2 +)| = 0.45(4) eb. The results support the three-neutron configurations (1i 13/2) 2 12 + ⊗ 3p 3/2 and (1i 13/2) 3 for the 21/2 − and 33/2 + states, respectively. The quadrupole moment of the 12 + isomer in 194 Pb described by the twoneutron (1i 13/2) 2 configuration has been remeasured as |Q(12 +)| = 0.48(3) eb in perfect agreement with the previous data. The experimental results are discussed within a microscopic BCS approach in a number-projected one-and three-quasiparticle neutron space, and in the frame of the pairing plus quadrupole tilted-axis cranking model.

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The paper presents a data processing algorithm, based on a deconvolution technique that enables the recovery of the low intensity spectral lines, in connection with the analysis of the radiative mechanisms from the non isothermal plasma of a hollow cathode discharge. This method represents a useful tool in the study of the radiative competitive processes involved in the selective excitation mechanisms for ISV and visible spectral line's emission. It permits the evaluation of the second kind collision's weight in conjunction with the concentration of the plasma ions for different discharge parameters.