K SINGH*, G K SANDHU, B S LARK^a and S P SUD^b

* Department of Physics, Guru Nanak Dev University, Amritsar 143 005, India
^a  Department of Chemistry, Guru Nanak Dev University, Amritsar 143 005, India
^b  Department of Physics, H.P. University, Shimla, India

E-mail: k_thind@yahoo.com

Abstract.

Molar extinction coefficients of some carbohydrates viz. L-arabinose (C₅H₁₀O₅), D-glucose (C₆H₁₂O₆), D-mannose (C₆H₁₂O₆), D-galactose (C₆H₁₂O₆), D(-) fructose (C₆H₁₂O₆) and maltose (C₁₂H₂₄O₁₂) in aqueous solutions have been determined at 81, 356, 511, 662, 1173 and 1332 keV by gamma ray transmission method in a narrow beam good geometry set-up. These coefficients have been found to depend upon the photon energy following a 4-parameter polynomial. These extinction coefficients for different sugars having the same molecular formula have same values varying within experimental uncertainty. Within concentration ranges studied, Beer--Lambert law is obeyed very well.

Keywords: Molar extinction coefficients; interaction cross-sections.

Pacs Nos.  29.30 Kv; 32.80.Cy