Effective atomic number of some sugars and amino acids for scattering of Am-241 and Cs-137 gamma rays at low momentum transfer

Vinaykumar, L. and Umesh, T. K. (2015) Effective atomic number of some sugars and amino acids for scattering of Am-241 and Cs-137 gamma rays at low momentum transfer. APPLIED RADIATION AND ISOTOPES, 103. pp. 100-101. ISSN 0969-8043

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Official URL: http://doi.org/10.1016/j.apradiso.2015.05.026

Abstract

In this paper, we report the effective atomic number of some H, C, N and O based sugars and amino acids. These have been determined by using a handy expression which is based on the theoretical angle integrated small angle (coherent+incoherent) scattering cross sections of seven elements of Z <= 13 in four angular ranges of (0-4 degrees), (0-6 degrees), (0-8 degrees) and (0-10 degrees)for Am-241 (59.54 key) and Cs-137 (661.6 key) gamma rays. The theoretical scattering cross sections were computed by a suitable numerical integration of the atomic form factor and incoherent scattering function compilations of Hubbell et al. (1975) which make use of the non-relativistic Hartree-Fock (NRHF) model for the atomic charge distribution of the elements in the angular ranges of interest. The angle integrated small angle scattering cross sections of the H, C, N and O based sugars and amino acids measured by a new method reported recently by the authors were used in the handy expression to derive their effective atomic number. The results are compared with the other available data and discussed. Possible conclusions are drawn based on the present study. (C) 2015 Elsevier Ltd. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Effective atomic number; Coherent scattering; In-coherent scattering; Low momentum transfer
Subjects: D Physical Science > Physics
Divisions: Department of > Physics
Depositing User: Shrirekha N
Date Deposited: 31 May 2019 06:16
Last Modified: 31 May 2019 06:16
URI: http://eprints.uni-mysore.ac.in/id/eprint/737

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