NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Widths of atomic 4s and 4p vacancy states, Z between 46 and 50X-ray photoelectron and Auger spectra involving N sub 1, N sub 2, and N sub 3 vacancy states of Pd, Ag, Cd, In, and Sn were measured and compared with results of free-atom calculations. As previously observed in Cu and Zn Auger spectra that involve 3d-band electrons, free-atom characteristics are found, with regard to widths and structure, in the Ag and Cd M sub 4-N sub 4,5 N sub 4,5 and M sub 5-N sub 4,5 N sub 4,5 Auger spectra that arise from transitions of 4d-band electrons. Theoretical N sub 1 widths computed with calculated free-atom Auger energies agree well with measurements. Theory, however, predicts wider N sub 2 than N sub 3 vacancy states (as observed for Xe), while the measured N sub 2 and N sub 3 widths are nearly equal to each other and to the average of the calculated N sub 2 and N sub 3 widths. The calculations are made difficult by the exceedingly short lifetime of some 4 p vacancies and by the extreme sensitivity of super-Coster-Kronig rates, which dominate the deexcitation to the transition energy and to the fine details of the atomic potential.
Document ID
19760044097
Document Type
Reprint (Version printed in journal)
Authors
Chen, M. H. (Howard Univ. Washington, DC, United States)
Crasemann, B. (NASA Ames Research Center Moffett Field, Calif.; Oregon, University, Eugene, Ore., United States)
Yin, L. I. (NASA Goddard Space Flight Center Astrochemistry Branch, Greenbelt, Md.; Howard University, Washington, D.C., United States)
Tsang, T. (NASA Goddard Space Flight Center Astrochemistry Branch, Greenbelt, Md.; Howard University, Washington, D.C., United States)
Adler, I. (Maryland, University College Park, Md., United States)
Date Acquired
August 8, 2013
Publication Date
April 1, 1976
Publication Information
Publication: Physical Review A - General Physics
Subject Category
ATOMIC AND MOLECULAR PHYSICS
Funding Number(s)
CONTRACT_GRANT: NGR-09-011-057
CONTRACT_GRANT: NGR-38-003-036
CONTRACT_GRANT: DAHC04-75-G-0021
Distribution Limits
Public
Copyright
Other