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Measurement of attenuation cross-sections of some fatty acids in the energy range 122–1330 keV

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Abstract

The mass attenuation coefficients (μ m) have been measured for undecylic acid (C11H22O2), lauric acid (C12H24O2), tridecylic acid (C13H26O2), myristic acid (C14H28O2), pentadecylic acid (C15H30O2) and palmitic acid (C16H32O2) using 57Co, 133Ba, 137Cs, 60Co and 22Na emitted γ radiation with energies 122, 356, 511, 662, 1170, 1275 and 1330 keV, respectively. The accurate values of the effective atomic number (Z eff), atomic cross-section (σ t,), electronic cross-section (σ e) and the effective electron density (N eff) have great significance in radiation protection and dosimetry. These quantities were obtained by utilizing experimentally measured values of mass attenuation coefficients (μ m). A NaI(Tl) scintillation detector with 8.2% (at 662 keV) resolution was used for detecting of attenuated γ-photons. The variation in Z eff and N eff of fatty acids with energy is discussed. The experimental and theoretical results are in good agreement within 2% deviation.

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Acknowledgements

The authors are thankful to DAE--BRNS for giving financial support for a major research project on the establishment of radiological data for biomolecules using γ-ray spectrometry (Reference No: 35 /14 /18 /2014-BRNS /0293 dated 16 May 2014). One of the authors (D K Gaikwad) would like to thank the University Grants Commission, New Delhi for providing RGNF.

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Authors and Affiliations

  1. Department of Physics, Dr Babasaheb Ambedkar Marathwada University, Aurangabad, 431 004, India

    D K GAIKWAD & P P PAWAR

  2. Radiation Physics and Advisory Division, BARC, Anushaktinagar, Mumbai, 400 085, India

    T P SELVAM

Authors
  1. D K GAIKWAD
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  2. P P PAWAR
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  3. T P SELVAM
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Correspondence to D K GAIKWAD.

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GAIKWAD, D.K., PAWAR, P.P. & SELVAM, T.P. Measurement of attenuation cross-sections of some fatty acids in the energy range 122–1330 keV. Pramana - J Phys 87, 12 (2016). https://doi.org/10.1007/s12043-016-1213-y

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  • DOI: https://doi.org/10.1007/s12043-016-1213-y

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