Mathematics – Logic
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995phdt........17l&link_type=abstract
Thesis (PH.D.)--UNIVERSITY OF MISSOURI - ROLLA, 1995.Source: Dissertation Abstracts International, Volume: 56-10, Section: B, pa
Mathematics
Logic
Solar System
Scientific paper
Mass spectrometric measurements on isotopes of xenon were used to test conservation laws of nature for weak nuclear interactions over the longest measured time scale, and to determine the origin of the solar system. In the first study, analyses of xenon in terrestrial ores of tellurium were used to determine the rates of double beta-decay, ^{128,130}Te -betabetato ^{128,130 }{Te}. By using the geochemical method, the isotopic compositions of xenon have been determined in two geologically-old tellurides, krennerite (AuTe _2) and altaite (PbTe). We calculate values of (4.2+/-0.8)times10^{ -4} and (4.4+/-0.8)times10 ^{-4} for the ratio of the total betabeta-decay half-lives, 130T_{1/2 }/128T_{1.2}, from the amounts of radiogenic ^{128 }Xe and 130Xe in the krennerite and altaite samples, respectively. These values are in good agreement with the ratio of half-lives calculated by the quasi-particle random phase approximation (QRPA) for 2upsilon betabeta -decay. For the second study, two FeS mineral separates from the Allende carbonaceous chondrite (C3V) were analyzed for Kr and Xe by a step-wise heating method. One sample was first irradiated in a neutron flux to generate a tracer isotope, ^{131*}Xe, by the 130Te(n, gammabeta-)^{131*}Xe reaction. For both samples, when sulfides melted at 950 ^circC, the Xe released was terrestrial in isotopic composition except for enrichments from spallogenic and radiogenic components. These results provide additional evidence for correlated elemental and isotopic heterogeneities in the protoplanetary nebula, with terrestrial-type Xe associated with the inner, Fe, S-rich region where terrestrial planets formed.
No associations
LandOfFree
The Xenon Record of Double Beta-Decay and Element Synthesis does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Xenon Record of Double Beta-Decay and Element Synthesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Xenon Record of Double Beta-Decay and Element Synthesis will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-837653