Magnesium borate (MgB °:Dy) has been used as beta dosemeter 4 7 quite successfully when mixed with graphite. Literature quotes different temperatures for the dosimetric peak at the same heating rate. This works shows that, for the same heating rate of 1°e.s·1 , the use or not of a pre-reading heat treatment of 100 C for 10minutes, affects the peak temperature, indicating that it is composed of more than one peak andjor it has kinetics of order different from 1. The parameters of two peaks, one at 133°e (order 1) and another at 156°e (order 2), which ajusted a experimental glow curve are presented.

Magnesium borate (MgB °:Dy) has been used as beta dosemeter 4 7 quite successfully when mixed with graphite. Literature quotes different temperatures for the dosimetric peak at the same heating rate. This works shows that, for the same heating rate of 1°e.s·1 , the use or not of a pre-reading heat treatment of 100 C for 10minutes, affects the peak temperature, indicating that it is composed of more than one peak andjor it has kinetics of order different from 1. The parameters of two peaks, one at 133°e (order 1) and another at 156°e (order 2), which ajusted a experimental glow curve are presented.