The isotopic enrichment in argon, krypton, and xenon, when trapped in water
ice, was studied experimentally. The isotopes were found to be enriched ac
cording to their(m(1) /m(2))(1/2) ratio. These enrichment factors could be
useful for comparison among the uncertain cosmic or solar isotopic ratios,
the hopeful in situ cometary ratio, and those in Earth's atmosphere, in the
context of cometary delivery of volatiles to Earth. (C) 1999 academic Pres
s.