Download Advances in Gamma Ray Resonant Scattering and Absorption: by Andrey V. Davydov PDF

By Andrey V. Davydov

This booklet offers the fundamentals and complex issues of analysis of gamma ray physics. It describes measuring of Fermi surfaces with gamma resonance spectroscopy and the idea of angular distributions of resonantly scattered gamma rays. The dependence of excited-nuclei typical lifetime at the form of the exciting-radiation spectrum and electron binding energies within the spectra of scattered gamma rays is defined. Resonant excitation via gamma rays of nuclear isomeric states with lengthy lifetime ends up in the emission and absorption traces. within the booklet, a brand new gamma spectroscopic technique, gravitational gamma spectrometry, is constructed. It has a solution hundred million instances better than the standard Mössbauer spectrometer. one other very important subject of this e-book is resonant scattering of annihilation quanta via nuclei with excited states in reference to positron annihilation. the applying of the equipment defined is to provide an explanation for the phenomenon of Coulomb fragmentation of gamma-source molecules and resonant scattering of annihilation quanta to review the form of Fermi surfaces of metals.

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Extra info for Advances in Gamma Ray Resonant Scattering and Absorption: Long-Lived Isomeric Nuclear States

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1 keV from (1) [24], (2) [25], (3) [26], (4) [27], (5) [28], (6) [29], (7) [30], (8) [31], (9) [32], (10) [33], (11) [15], (12) [16], and (13) [18]. The g-factor values obtained upon the treatment of data on the basis of the theory that takes into account the ratio of the width of the spectrum of gamma rays that experienced resonant scattering to the natural width of the excited nuclear level are shown by the dotted lines under points 12 and 13. The average g-factor value and the error in it according to calculations based on the g-factor values corresponding to points 4–11 are represented by the horizontal shaded band delivered at the Winter School in Physics at the Ioffe Leningrad Institute for Physics and Technology in 1970 [16].

018) appears to be considerably lower than the average g-factor value (in Fig. 7, this point is shown by the dotted line below point 13). The situation around the other three g-factors measured in [18] is similar, but, for osmium isotopes, especially for 188Os, there is some excess of the measured values over the g-factor values obtained by averaging the results of other studies. It does not seem possible to explain this situation on the basis of information presented in [18]. There are no reasons to criticize that experiment.

Therefore, the quasimonochromatic oscillation time delay created by a classical resonance filter is similar to the result that a quantum-mechanical consideration gives for the mean lifetime of a nucleus in an excited state after the resonant absorption of gamma rays with a narrow spectrum 30 1 Theory of the Resonant Scattering of Gamma Rays… on the scale of Г. So far does the similarity extend in the behavior of these classical and quantum-mechanical resonance systems, which seem very different ones.

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