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ratio measurement
The isomeric-ratio measurement of 8 nuclei allows to determine the spin of the compound nucleus at the binding energy.
      
A technique for a precise isotope ratio measurement of 129I/127I is developed in the mass spectrometer by negative thermal ionization.
      
The detection limits of this method - which could be improved by a more precise isotope ratio measurement - are 13 ppb for Cl-, 0.4 ppb for Br- and 0.1 ppb for I-.
      
The mass spectrometric isotope ratio measurement was carried out in a thermal ionization instrument using the formation of negative Se- thermal ions for detection.
      
The described isotope ratio measurement is an important improvement for Re/Os dating of terrestrial and extraterrestrial samples.
      
Sample preparation and ratio measurement uncertainties have been evaluated.
      
A method has been developed for n(18O)/n(16O) ratio measurement which uses thermal ionization mass spectrometric (TIMS) analysis of the 238UO+ species.
      
The hydride generation (LI2) system was identified as the most suitable sample introduction method yielding maximum sensitivity and precision for Se isotope ratio measurement.
      
The development of this approach was made possible due to the improved sensitivity and accuracy of sulfur isotope ratio measurement by ICP-MS in recent years.
      
Magnetisation transfer ratio measurement in the cervical spinal cord: a preliminary study in multiple sclerosis
      
The molecular information contained in the negative spectrum and peaks ratio measurement identify the top surface as being saturated with fluorinated chains.
      
Isotopic ratio measurement of methane in ambient air using mid-infrared cavity leak-out spectroscopy
      
The present system requires only few minutes for an isotopic ratio measurement with a precision of 11%o .
      
Development of a local continuous sampling probe for the equivalence air-fuel ratio measurement.
      
One type of condenser was designed for condensate measurement and gas sampling for Radon activity determination; the other, with NaOH absorbing solution, for the S/Cl ratio measurement and the sampling of rare gases.
      
Numerical calculation for a moderate size 1.064 μ lidar shows that an accuracy better than 1 m/s for the velocity measurement and 18% for the backscatter ratio measurement can be obtained up to a height of 10 km by a 500 shot average.
      
Based on the data collected during the 1998 and 1999 run periods, a sample of 1162 candidates has been observed with an expected background level of 36.9 events, yielding the branching ratio measurement .
      
A photon collider offers the possibility of a direct branching-ratio measurement.
      
A rapid method for uranium isotope ratio measurement by inductively coupled plasma mass spectrometry
      
The two-photon polarization parameter of rhodamine 6G is determined by contrast ratio measurement.
      
 

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