Mathematics – Logic
Scientific paper
Jan 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986phrvd..33...32d&link_type=abstract
Physical Review D (Particles and Fields), Volume 33, Issue 1, 1 January 1986, pp.32-38
Mathematics
Logic
4
Binding Energies And Masses, 20<=A<=38
Scientific paper
A search has been made for isotopes of sodium of mass >100 amu. Such heavy isotopes could arise from the presence of superheavy particles in the primordial soup which became constituents of nuclear matter. The experimental technique involved studying the isotopic mass shift of the Na D2 atomic transition using high-resolution laser spectroscopy and the photon-burst method. An upper limit for the heavy-particle-to-nucleon ratio of 5×10-12 was found. Cosmological-model predictions for this ratio in nuclear matter are ~=10-10. Any comparison of these two values assumes no mass fractionation has occurred in the geophysical disposition and subsequent extraction of the sodium forming the atomic beam and also no differences in the distribution of heavy isotopes among the elements, compared to normal isotopes, during their astrophysical formation. Making these assumptions enables limits to be placed on the heavy-particle annihilation cross sections in the formation process.
Dick W. J.
Greenlees G. W.
Kaufman S. L.
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