Measurements and predictions of the 6 s 6 p 1 , 3 P 1 lifetimes in the Hg isoelectronic sequence
نویسندگان
چکیده
Experimental and theoretical values for the lifetimes of the 6s6pP1 and P1 levels in the Hg isoelectronic sequence are examined in the context of a data-based isoelectronic systematization. New beam-foil measurements for lifetimes in Pb III and Bi IV are reported and included in a critical evaluation of the available database. These results are combined with ab initio theoretical calculations and linearizing parametrizations to make predictive extrapolations for ions with 84<Z<92.
منابع مشابه
Determination of polarizabilities and lifetimes for the Mg, Zn, Cd and Hg isoelectronic sequences
The dipole polarizability and adiabatic correlations of atomic ions are related to the energy levels and oscillator strengths of the levels through bracketing inequalities. For systems with a ground state ns2 S0, the total oscillator strength is dominated by the unbranched intrashell ns2 S0–nsnp P1 transition, and the remaining oscillator strength can be narrowly bracketed using the f -sum rule...
متن کاملExperimental determination of the helium 2(3)P(1)-1(1)S0 transition rate.
We present the first experimental determination of the 2(3)P(1)-1(1)S0 transition rate in helium and compare this measurement with theoretical quantum-electrodynamic predictions. The experiment exploits the very long (approximately 1 minute) confinement times obtained for atoms magneto-optically trapped in an apparatus used to create a Bose-Einstein condensate of metastable (2(3)S1) helium. The...
متن کاملLifetimes of the 3 p 54 s 3 P 1 , 1 P 1 and 3 p 53 d 3 P 1 levels in K II
Oscillator strengths for the three lowest ground-state transitions 3p S0-3p 4s P1, 3p 6 S0-3p 4s P1, and 3p 6 S0-3p 3d P1 in argonlike K II are reported. The values were determined by lifetime measurements made using foil excitation of a fast ion beam, which yielded values t(4s P1)58.461.6 ns, t(3d P1)52.460.4 ns, and t(4s P1)50.4360.04 ns. Application of these results to the development of ext...
متن کاملAccumulation Variations of selected heavy metals in Barbus xanthopterus in Karoon and Dez Rivers of Khuzestan, Iran
The concentrations of Cd, Pb, Ni and Hg were determined in gill, liver and muscle of Barbus xanthopterus in down streams of Karoon and Dez Rivers during summer 2009. Heavy metal concentrations varied significantly, depending on the types of the tissue in fish species. The levels of heavy metals such as Cd, Pb, Ni and Hg in the Barbus xanthopterus of Karoon River were higher than in B...
متن کاملAccumulation Variations of selected heavy metals in Barbus xanthopterus in Karoon and Dez Rivers of Khuzestan, Iran
The concentrations of Cd, Pb, Ni and Hg were determined in gill, liver and muscle of Barbus xanthopterus in down streams of Karoon and Dez Rivers during summer 2009. Heavy metal concentrations varied significantly, depending on the types of the tissue in fish species. The levels of heavy metals such as Cd, Pb, Ni and Hg in the Barbus xanthopterus of Karoon River were higher than in Barbus xant...
متن کامل