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+}

Journal Article · Thu Apr 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.042512· OSTI ID:21408601

Hanni, M E; Keele, Julie A; Lundeen, S R; Fehrenbach, C W; Sturrus, W G ^[1]

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1. 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, Journal Name: Physical Review. A Journal Issue: 4 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BINDING ENERGY
CHARGED PARTICLES
ELECTRICAL PROPERTIES
ENERGY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FINE STRUCTURE
GROUND STATES
IONIZATION
IONS
LEAD IONS
LIFETIME
PHYSICAL PROPERTIES
POLARIZABILITY
POLARIZATION
RESONANCE
RYDBERG STATES
SPECTRA
SPECTROSCOPY