An advanced laboratory in nuclear-isotope mass spectroscopy

Details An advanced laboratory in nuclear-isotope mass spectroscopy An advanced laboratory in nuclear-isotope mass spectroscopy

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998amjph..66.1048s&link_type=abstract

American Journal of Physics, Volume 66, Issue 12, pp. 1048-1055 (1998).

Physics

Laboratory Experiments And Apparatus, Atomic Masses, Mass Spectra, Abundances, And Isotopes

Scientific paper

We describe an experiment in nuclear-isotope mass spectroscopy, suitable for an advanced physics laboratory, which utilizes a relatively inexpensive commercial 60°-dipole residual gas analyzer. Students measure the terrestrial abundance of the isotope 22Ne relative to 20Ne and compare this with recent measurements of this ratio in meteorites. These ratios provide clues to the astrophysical sites, astrophysical processes, and nuclear reactions which formed these isotopes. The mass spectrometer is also used as a residual gas analyzer to examine the gas composition (O2, N2, H2O,...) at various pressures in a typical vacuum system. This gives students insight into the design of vacuum apparatus including the optimal selection of components such as vacuum pumps for particular applications.

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