Letter | Published:

The Isotopes of Selenium and some other Elements

Nature volume 110, page 664 (18 November 1922) | Download Citation



THE first experiments with selenium some time ago were not successful. Very satisfactory mass-spectra have now been obtained by vaporising the element itself in the discharge tube. The interpretation of these is quite simple and definite, so that the results may be stated with every confidence. Selenium consists of six isotopes, giving lines at 74 (f), 76 (c), 77 (e), 78 (b), 80 (a), 82 (d). The line at 74 is extremely faint. The intensities of the lines are in the order indicated by the letters, and agree well enough with the chemical atomic weight 79.2. Measurement of the lines shows no detectable deviation from the whole number rule.

Access optionsAccess options

Rent or Buy article

Get time limited or full article access on ReadCube.


All prices are NET prices.

Author information


  1. Cavendish Laboratory, Cambridge, November 6.

    • F. W. ASTON


  1. Search for F. W. ASTON in:

About this article

Publication history





By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.