Majorana dr Ettore: Search for a General Expression of Rydberg Corrections, Valid for Neutral Atoms or Positive Ions∗

2020 ◽  
pp. 35-42
Author(s):  
Ettore Majorana
Keyword(s):  
General Expression ◽  
Neutral Atoms ◽  
Positive Ions

scholarly journals Dissociation, recombination and attachment processes in the upper atmosphere II. The rate of recombination

1939 ◽  
Vol 170 (942) ◽  
pp. 322-340 ◽  
Keyword(s):  
Negative Ions ◽  
Neutral Molecule ◽  
Upper Atmosphere ◽  
The Other ◽  
Negative Ion ◽  
Neutral Atoms ◽  
Attachment Rate ◽  
Additional Advantage ◽  
Positive Ions ◽  
Positive Ion

The ionized regions of the upper atmosphere include, not only neutral atoms and molecules, electrons and positive ions, but also negative ions. Of these, electrons are alone effective in producing reflexion of wireless waves; so that an electron attached to a neutral molecule to form a negative ion is as effectively removed from active participation in these phenomena as one recombined with a positive ion to form a neutral molecule. The decay of electron density at night has been attributed by some authors to recombination with positive.ions and by others to attachment by neutral molecules. The first process is in agreement with the observed law of decay and has the additional advantage of making it easily possible to understand the formation of layers of concentrated ionization; on the other hand, the chance of attachment to a molecule per impact would have to be extremely small for the attachment rate to be negligible, since the number of collisions per second with neutral atoms is very much greater than with positive ions.

The emission of positive ions from hot tungsten

1932 ◽  
Vol 28 (4) ◽  
pp. 490-496 ◽  
Author(s):  
P. B. Moon
Keyword(s):  
Work Function ◽  
Electron Work Function ◽  
Ion Currents ◽  
Neutral Atoms ◽  
Ionisation Potential ◽  
Saha Equation ◽  
Positive Ions ◽  
Rate Of Evaporation ◽  
Positive Ion

Measurements have been made of the positive ion currents emitted by tungsten at temperatures between 3000°K. and 3200°K. The results are in general accordance with the values calculated on the basis of the Saha equation from the rate of evaporation of neutral atoms, the electron work-function and the ionisation potential of tungsten. The “work-function” associated with the ionic evaporation appears to lie between 10 and 11 electron-volts.

Slater–Condon parameters for the transition elements, evaluated from analytical Hartree–Fock functions

1968 ◽  
Vol 46 (19) ◽  
pp. 2228-2229
Author(s):  
Carolyn Fisk ◽  
Serafin Fraga
Keyword(s):  
Negative Ions ◽  
Neutral Atoms ◽  
Transition Elements ◽  
Hartree Fock ◽  
Positive Ions

The Slater–Condon integrals for the positive ions, neutral atoms, and negative ions from Sc to Zn have been evaluated from analytical Hartree–Fock functions.

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