Ali Kadhim Aziz, Ibrahim Kaittan Fayyadh, Nada Mohammed Hassan, Farhan Lafta Rashid, Saadallah Taha Idan, Measurement of Void Fraction for Fluid Flow Using Gamma Ray, Research Journal of Applied Sciences, Volume 8,Issue 6, 2013, Pages 338-339, ISSN 1815-932x, rjasci.2013.338.339, (https://makhillpublications.co/view-article.php?doi=rjasci.2013.338.339) Abstract: In this research, the void fraction for oil-water mixture are measured by using radiation source 137Cs with activity of 0.636 μCi. The plastic-tube contain the mixture are putting interior beaker and subjected into radiation to measure the void fraction. There are many applications industries such as oil and gas pipelines, heat exchangers, etc. Keywords: Oil-water flow;oil-water;two-phase flow;void fraction;neutron transport