tailieunhanh - Báo cáo " Determination of the annual beta dose by meaming beta activity using the liquid scintillation technique "

This paper presents a method for measuring the gross alpha/beta radioactivity of ancient pottery by using the liquid scintillation technique, Tri - carb2770TR/SL in the alpha/beta discrimination counting mode. The beta radioactivity is converted to the annual dose, which can be applied in dating of pottery by thermoluminescence technique. | VNU Journal of Science Mathematics - Physics 24 2008 36-41 Determination of the annual beta dose by meaming beta activity using the liquid scintillation technique Nguyen Quang Mien1 Bui Van I .oat2 institute of Archaeology 61 Phan Chu Trinh Hoan Kiem Hanoi Vietnam 2College of Sciences VNU 334 Nguyen Trai Thanh Xuan Hanoi Vietnam Received 3 August 2007 received in revised form 28 March 2008 Abstract. This paper presents a method for measuring the gross alpha beta radioactivity of ancient pottery by using the liquid scintillation technique Tri - carb2770TR SL in the alpha beta discrimination counting mode. The beta radioactivity is converted to the annual dose which can be applied in dating of pottery by thermoluminescence technique. In comparision with the radiocarbon technique the preliminary results shown that the liquid scintillation technique may be applied effectively for ancient ceramic dating in Vietnam. Keywords Environmental radioactivity Dosimeter Thermoluminescence Dating 1. Introduction Pottery is one of the most important archaeological relics to study on ancient cultures and art histories. Every civilized culture had left some earthen wares featured by their characteristic forms shapes designs materials and other technical stamps imprints. Hence forms and materials are normally used to categorize earthenware by culture and period accordingly. This is particularly important for the archaeological investigation of prehistoric periods where human culture could not yet be characterized by the written letters remained. The pottery s age is an important term therefore if there are more scientifically founded methods to date ancient pottery the categorization of cultural periods will be more precise. One of the reliable methods to date archaeological pottery is the thermoluminescence method TL which is effectively applied in many countries all over the world 1 2 . In the natural environment the ionizing radiations from the radioactive elements contained in .