... AD0143973. Title : RELATIVE ISOTOPIC ABUNDANCES OF THE ELEMENTS. ... 1. Descriptors : *ISOTOPES, ABUNDANCE, ERRORS. ...
DTIC Science & Technology
... Zn). This correction is made by monitoring the abundance of 6°Ni, assuming natural isotopic abundances, and correcting ...
... natural abundance isotopic measurement of δ ... freshwater plume into the deep salt wedge natural abundance isotopic measurements are ...
... Title : DETERMINATION OF THE ISOTOPIC RATIOS OF ... Descriptors : *CARBON, *HYDROGEN, ABUNDANCE, CHEMICAL ANALYSIS, ISOTOPES. ...
terrestrial isotopic abundance data that would make their analysis of the ... Abundance column of isotope data on the Terrestrial Isotope Data Set, ...
NASA Website
isotopic abundance. This information will help them learn about events and ... abundance? Why do scientists believe that the isotopic abundance data that ...
Measurements of the natural abundances of carbon isotopes were made in acetate samples isolated from
NASA Technical Reports Server (NTRS)
MEASUREMENT OF THE ABUNDANCE OF RADIOACTIVE 10Be AND OTHER ... designed to measure the isotopic composition of the light isotopes (3 ...
This report consists of data on isotopic abundance measurements and their variation in nature from 1991 to the present.
National Technical Information Service (NTIS)
DOE Information Bridge
(Isotopic abundances of ozone are constrained to be the expected fraction of the retrieved abundance of the dominant isotope. ...
... isotopic abundance of each molecular species on the database. 3.15 Module BD-QT ... The isotopic abundance program was ...
... the isotopic gases and can represent the isotopic abundance of the iso- ... mining the isotopic abundance from the cracking patterns of the gas ...
Isotopic masses converted to the C/sup 12/ = 12.000000 scale are given along with the square roots of the masses and the relative abundances of the isotopes. Abundances are normalized to an apparent abundance of 100% for the most abundant ...
Energy Citations Database
... abundances is given only for the most abundant isotope, so the ... Analysis of SW elemental abundance data from the NASA Genesis mission is not ...
Raman scattering is used to measure isotope ratios and/or isotopic abundances. A beam of quasi-monochromatic photons is directed onto the sample to be analyzed, and the resulting Raman-scattered photons are detected and counted for each isotopic species of interest. These photon counts are treated mathematically to ...
... fractionation factor was calculated as the difference in isotopic abundance between diet and tissue. Stable-isotope analyses were ... marine diets differed in stable-carbon and nitrogen isotopic abundance...
NBII National Biological Information Infrastructure
Absolute values have been obtained for the isotopic abundance ratios of a reference sample of nickel (Standard Reference Material 986), using thermal ionization mass spectrometry. Samples of known isotopic composition, prepared from nearly isotopically pu...
An absolute value has been obtained for the isotopic abundance ratio of a reference sample of gallium (Standard Reference Material 994), using thermal ionization mass spectrometry. Samples of known isotopic composition, prepared from nearly isotopically p...
Lithium abundances and isototpic compositions from three ureilites are reported. Spot analyses reveal spatial correlations between abundances and isotopic compositions with features such as cracks, grain boundaries and the ubiquitous reduced rims.
NASA Astrophysics Data System (ADS)
... product of the isotopic abundance and the alloy proportion ... activity even though the isotopic abundance of 1 3 C in natuLa! carbon is only 1.1%. ...
Noble gas abundance and isotope ratios in the atmosphere of Jupiter from the Galileo Probe Mass Spectrometer. P. R. Mahaffyf H. B. Niemann,1 A. Alpert} ...
(Isotopic abundances of ozone are constrained to be the expected fraction of the retrieved abundance of the dominant isotope.) The Level 2 files are ...
Oct 1, 2010 ... This experiment was designed to determine the isotopic abundance in the primary cosmic rays for hydrogren through nickel. ...
... Abstract : The isotopic abundance of He(3) in one sample each of "well" helium and "atmospheric" helium has been measured by detecting the He(3 ...
Abstract: Geochemical studies on the tritium chronology of Lake Vanda, the natural abundance of nitrogen isotopes in soil and evaporites in the Dry Valleys ...
Jan 28, 2009 ... Abstract: Geochemical studies on the tritium chronology of Lake Vanda, the natural abundance of nitrogen isotopes in soil and evaporites in ...
Analytical precision for abundance and isotopic determinations are noted in the tabulation. These data are the result of a completed NSF-OPP geochemical ...
Literature on isotopic abundance measurements and their variation in nature have been reviewed for impact on standard atomic weight values and associated uncertainties for recent measurements.
Abundances of the isotopes of the refractory elements Ca, Fe, Co, and Ni in the galactic cosmic-ray source are compared with corresponding abundances in ...
We find that the relative abundance of cosmic ray calcium isotopes in the cosmic-ray source are very
... Natural abundance radiocarbon isotope analysis of inorganic carbon in the groundwater and vadose zone may be used as an in situ confirmation ...
... The relative intensities of the isotope shifted transitions are proportional to each isotope's relative abundance shown in Table 1. The relative ...
... Of course, the intensities of the isotope shifted transitions are proportional to each isotope's relative abundance [11, 14, 15]. ...
... Yellowstone National Park (YNP) is unrivaled for the abundance and diversity of ... The bulk of the physical, chemical and isotope data for the thermal ...
A special class of refractory inclusions in carbonaceous meteorites show large isotopic anomalies in
The carbon and nitrogen isotopic compositions of seven of the most abundant alkylporphyrins from the
