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Atomic Nuclear Physics

Deconvolution: With Applications in Spectroscopy by Peter A. Jansson

By Peter A. Jansson

The Literature on deconvolution is wealthy with the contributions of many investigations. those contributions are, although, scattered between journals dedicated to various specialties. No unmarried quantity has been on hand that gives either an summary and aspect wanted through a newcomer to this box.

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Samples 29 300 0C 3 2 1 200 0C 3 2 1 0 pristine 2 4 6 θ (mrad) 8 10 using (4) which in the case of one-dimensional diffusion, is related to diffusivity D(T) through the relation L2d = 2D(T)t. 7 × 10−22 m2 /s respectively. These values are well below the grain boundary diffusion in polycrystalline Fe [18], however are comparable to diffusivity in nanocrystalline FeZr [19], where diffusion occurs mainly through grain boundaries which are amorphous in nature. These results demonstrate that nuclear resonance reflectivity from isotopic marker layers under standing wave conditions can be used to study self-diffusion with an accuracy which is roughly an order of magnitude better than that obtainable using conventional techniques like SIMS.

X-rays diffraction shows that the film is amorphous in nature. ID22N beamline of ESRF was used for measuring both electronic and nuclear pats of the reflectivity. The storage ring operated in 16-bunch mode providing short pulses of x rays (duration ∼100 ps) every 176 ns. The radiation from the undulator source, optimized for the 14,413 eV transition in 57 Fe, was filtered by a double Si (111) reflection followed by a high-resolution nested monochromator, providing a bandpass of 4 meV [12]. The scattered radiation was detected using fast avalanche photodiodes (time resolution ∼1 ns).

The values of these parameters are the same, within the errors. This result strongly suggests that iron in SN is bound mainly to ferritin. 0005 Relative Counting Rate Fig. 1 K from a fresh frozen sample of SN J. 9995 -10 -8 -6 -4 -2 0 2 4 6 8 10 Velocity (mm/s) The comparison of the concentration of iron in control and parkinsonian SNs did not show any difference. The first comparison was made on eight control SNs and six parkinsonian SNs [2]. The average concentration of iron in control tissue was 163 ± 12 ng/mg and for pathological tissue 159 ± 13 ng/mg.

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