Πρωτότυπος μετρητής ολοσώμου γ-ακτινοβολίας και η χρήση του στον in-vivo προσδιορισμό του ραδιενεργού καλίου και καισίου

The present study, in the first part deals with the design and construction of a prototype whole body and partial body shadow shield γ-counter, as well as the study and determination of charasteristic parameteres (i.e sensitivity, uniformity) and calibration of γ-counter. The originality of the γ-counter consists in that the distance between the detectors easily changes. This feature allows the user to achieve the desired uniformity or sensitivity of the measurement. The detectors are two Nal(TI) crystals with a total active volume of 12500 cm³. In the second part, various measurements were performed using the whole-body γ-counter. These measurements concern the total content of the human body in potassium (K) and thus the concentration of Κ in the body of 116 normal Greeks, This concentration was proved to be in correlation with the age and the mass of the body. Also, the consequences of the fall out of the Cesium (¹³⁷Cs-¹³⁴C₃), radionuclides, in Greece, following the nuclear accident in Chernobyl were estimated. This was done by in-vivo measurements of radioactivity in several groups of people. The total internal dose was determined for of each group. It was found that this dose was 0.420 mSv for men and 0.275 nSv for women, within the first 2.5 years after the accident. It was also found that children suffered a dose of 0.232 mSv , within the first 1.5 years.

Grantor dc:publisher

University of Ioannina

Year dc:date

1990

Authors dc:creator

• Leontiou, Ioannis
• Λεοντίου, Ιωάννης

• Μετρητής επιμέρους γ-ακτινοβολίας
• Μετρητής ολοσώμου γ-ακτινοβολίας εγγύς θωράκιση
• Ολόσωμη δόση
• Ραδιενεργό καίσιο 137-134
• Ραδιενεργό κάλιο-40
• Cesium 137-134
• Partial-body γ-counter
• Pottasium-40
• Whole-body dose
• Whole-body γ-counter, shadow shield
• Ιατρική και Επιστήμες Υγείας
• Επιστήμες Υγείας
• Άλλες Ιατρικές Επιστήμες
• Medical and Health Sciences
• Health Sciences
• Other Medical Sciences

Language dc:language

gre

Identifier

10.12681/eadd/1405

OAI identifier oai:identifier

oai:10442/1405