ISSN:
1090-6509
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The possibility of observing pure nuclear resonant scattering of synchrotron radiation by a multilayer structure containing the 169Tm isotope is analyzed theoretically. The main problem is the need to suppress the enormous background of radiation scattered by electrons. Two methods for the destructive interference of a synchrotron radiation beam in reflection at grazing incidence by a layered system containing Tm nuclei in one of the layers are considered, and their efficiency as applied to the conditions of third-generation synchrotron radiation sources, such as in the European Synchrotron Radiation Facility (ESRF), is calculated. An electron scattering suppression efficiency parameter is formulated as the ratio of the integrated nuclear scattering intensity (with a time delay) to the total prompt electron scattering intensity in assigned ranges of angles and energies. In the first method thin films of a special type on a substrate, viz., GIAR films, are used. In the second method a new effect, which is termed the Bragg antipeak effect and involves the destructive interference of a wave that is Bragg-diffracted in a multilayer superlattice and a wave reflected on the upper boundary of the sample, is employed. The physical properties of the Bragg antipeak effect are considered, and it is found that its efficiency is sufficient for practical use.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1134/1.558623
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