Title: Using chlorophyll as gamma absorber

Biography:

Jaleel Kareem Ahmed, Polymer and Petrochemical Industries Department, College of Materials Engineering, Babylon University, Babylon, Iraq

Abstract

Chlorophyll extracted from celery using 50% v/v water – methyl alcohol as a solvent. By this method theconcentration of chlorophyll was 22.6% with yellowish-green color. This solution showed strongly absorption at 400 – 210 nmand maximum was at the end of ultra-violet region. This absorption appeared in water, methyl alcohol, and acetone, butstrongest absorption was in water. No emission spectra was detected in the ultra-violet and visible regions which means thatchlorophyll absorbs radiation and dissipate it as a heat.Several samples of the above solution was radiated by gamma ray fromcesium-137 with energy of 0.7 Mev for different intervals (0.5, 1, 2, 4, 24 hours). The color of the solution disappeared aftertwo hours radiation while the pH decreases from 6.38 for unradiated to radiated celery solution 4.17 after 24 hours radiationwith liberation of carbon dioxide which indicates destroying of chlorophyll but the absorption at 400 – 210 nm still existswhich reflects the high stability of the group magnesium-four nitrogen atoms (tetrapyrrole) its energy about 3500 kJ mol-1. Theresulted carbon dioxide carries by hemoglobin to expel via lungs similar to that produces by biological activity of thebody.Calculation showed that the dosage of two hours radiation in which color of the solution disappeared (Compton effect)was 5.6 killogray (1 gray = 1 Joule per 1 kg sample) absorbed by chlorophyll before color disappear is enough to kills 1120people weight 75 kg each within 14 days when the whole bodies exposure at one time.The samples glass containers and theirwhite plastic covers of the radiated samples for 4 and 24 hours changed their color to violet may be due to the rearrangement oftheir physical structures. Others interesting points will appear in the full article.Capsules used as carrier for the chlorophyll totake it by children.

Keywords: Chlorophyll, Gamma Ray, pH, Celery, Energy