Polarizabilities of Pb{sup 2+} and Pb{sup 4+} and ionization energies of Pb{sup +} and Pb{sup 3+} from spectroscopy of high-L Rydberg states of Pb{sup +} and Pb{sup 3+}
- Department of Physics, Colorado State University, Fort Collins, Colorado 80523 (United States)
The binding energies of high-L Rydberg levels of Pb{sup +} with n=19 or 20 and 6{<=}L{<=}10 were measured with resonant excitation Stark ionization spectroscopy (RESIS). When combined with previous measurements of members of the nh Rydberg series in Pb{sup +}, and analyzed with the long-range polarization model, these determined the polarizability of the 5d{sup 10}6s{sup 2} ground state of Pb{sup 2+} to be {alpha}{sub d} = 13.62(8) a.u. This value is substantially larger than the estimate published recently based on the measured lifetime of the 6s6p{sup 1}P{sub 1} resonance level of Pb{sup 2+}, 7.9(6) a.u. The difference is mostly due to the polarizability of Pb{sup 4+}, the 5d{sup 10} core of the Pb{sup 2+} ion. This was established by observation of resolved fine structure in the excitation of n=39, high-L Rydberg levels of Pb{sup 3+}, using the same RESIS technique. Analysis of this spectra determined the polarizability of Pb{sup 4+} to be {alpha}{sub d} = 3.61(4) a.u. Reanalysis of optical spectra of nh and ng levels in Pb{sup +} and Pb{sup 3+} in view of the polarizabilities determined in the RESIS studies indicates revised ionization energies of both ions, E{sub I}(Pb{sup +}) = 121245.28(6) cm{sup -1} and E{sub I}(Pb{sup 3+}) = 341 435.1(8) cm{sup -1}.
- OSTI ID:
- 21408601
- Journal Information:
- Physical Review. A, Vol. 81, Issue 4; Other Information: DOI: 10.1103/PhysRevA.81.042512; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BINDING ENERGY
EXCITATION
FINE STRUCTURE
GROUND STATES
IONIZATION
LEAD IONS
LIFETIME
POLARIZABILITY
POLARIZATION
RESONANCE
RYDBERG STATES
SPECTRA
SPECTROSCOPY
CHARGED PARTICLES
ELECTRICAL PROPERTIES
ENERGY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITED STATES
IONS
PHYSICAL PROPERTIES