Application of the Genetic Algorithm Joint with the Powell Method to Nonlinear Least-Squares Fitting of Powder EPR Spectra

2005 ◽  
Vol 45 (1) ◽  
pp. 18-29 ◽  
Author(s):  
Tomasz Spałek ◽  
Piotr Pietrzyk ◽  
Zbigniew Sojka
Keyword(s):  
Genetic Algorithm ◽  
Least Squares ◽  
Nonlinear Least Squares ◽  
Epr Spectra ◽  
Least Squares Fitting ◽  
Powell Method

THE DECAY OF 89Rb

1966 ◽  
Vol 44 (11) ◽  
pp. 2661-2683 ◽  
Author(s):  
J. E. Kitching ◽  
M. W. Johns
Keyword(s):  
Least Squares ◽  
Gamma Rays ◽  
Nonlinear Least Squares ◽  
Q Value ◽  
Least Squares Fitting

The decay of 14.9-minute 89Rb to levels in 89Sr has been studied by use of Ge(Li) detectors, NaI(Tl) detectors, and a magnetic beta-ray spectrometer. Fourteen gamma rays have been studied by γ−γ and β−γ coincidence experiments and establish levels at 0, 1.031, 2.000, 2.277, 2.567, 2.708, 2.770, 3.225, and 3.500 MeV. The Q value is 4.486 ± 0.012 MeV. The γ−γ and β−γ data were analyzed by a nonlinear least-squares fitting technique, which is described.

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