Abstract
The spectrum emitted by neutral arsenic atoms was observed photographically in the infrared, visible, and ultraviolet, and new lines were discovered in each spectral region. Measured wavelengths and estimated relative intensities are given for 330 lines, ranging from 1407.34 to 11679.9 A in wavelength and from 1 to 2000 in intensity. More than 74 percent of the total number and 97 percent of the total intensity of observed lines have been explained as combinations of 30 odd energy levels arising from 4s 4p and 4s 4p np electron configurations and 58 even levels from 4s 4p, 4s 4p ns, and 4s 4p nd. The average difference between observed and computed wave numbers is 0.14 cm-. Most of the observed levels have been assigned to doublet and quartet terms, and spectral series of the type 4S2 4^3 — 4S2 4^2 ns have been identified. Calculations based on these series yield an absolute value of 79165 cm for the ground state 4s 4p 4 S ^ of neutral arsenic atoms, that is, an ionization potential of 9.81 ±0.01 electron volts.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of Research of the National Bureau of Standards
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
