Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Multiple Electron Transitions and Primed Spectral Terms

Not Accessible

Your library or personal account may give you access

Abstract

Excitation of the lines of Mg+ in low-voltage, low-current discharge. The stronger lines of Mg+ appear at potentials equal to the ionization potential of Mg plus the excitation voltages predicted from their classifications. This proves that a single impacting electron can ionize an atom and raise a valence electron of the ion to a higher orbit.

Excitation of the pp′ lines of Mg and Cd in low-voltage, low-current discharge. Using a quartz spectrograph to analyze light from the force-free space between grid and plate, it was found that the Mg pp′ group (2776 to 2783 A) appears at current densities less than 0.2 milliampere per square centimeter. Since these lines are produced by electron transitions from an initial state in which there are two electrons in virtual orbits, this observation shows that the two electrons are moved to these orbits as a result of a single collision; lines which could be produced only by successive impact are entirely absent at much larger current densities. The pp′ group of Cd (2239 to 2329 A) appears at its quantum voltage, but is too faint to be detected at current densities which exclude the possibility of successive excitation.

Several lines of Cd, In, and Tl are classified by the use of primed terms.

Extension of the subordinate series of Cd: spectra of Cd below the ionization potential. The low-voltage arc in Cd yielded a number of new lines of the singlet and triplet subordinate series. In exposures taken below the ionization potential the lines of Cd are excited exactly at the voltage intervals predictable from the classification of the spectrum.

© 1925 Optical Society of America

Full Article  |  PDF Article
More Like This
On the Deep Lying Terms in Two- and Three-Valence Electron System Spectra*

Ralph A. Sawyer
J. Opt. Soc. Am. 13(4) 431-442 (1926)

Quantum Number Relations in Series Spectra

R. B. Lindsay
J. Opt. Soc. Am. 11(1) 17-30 (1925)

A Low-Voltage Electron-Beam Oscillograph

J. W. Buchta
J. Opt. Soc. Am. 10(5) 581-590 (1925)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Figures (3)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Tables (4)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Equations (5)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved