To ensure the safe use of ionizing radiation, thermoluminescent crystals (TL) are extensively used as passive dosimeters (TLD). However, a limited number of TL phosphors, especially for neutron dosimetry, are available. Thus, a demand exists for new materials with adapted properties for specific applications. For personal dosimetry, the material needs to present a low atomic number Zeff, similar to that of tissue (~ 7.4 for photoelectric absorption) and other features such as high sensitivity and low fading of the stored signal. In this respect, magnesium tetraborate is very promising being its main characteristics: Zeff=8,4; main TL peak around at 200°C; and sensitivity to gamma rays about 10 times higher than that of LiF.
Thermoluminescent pellets of MgB4O7:Dy evaluated for neutron dosimetry
CIOLINI, RICCARDO;D'ERRICO, FRANCESCO;
2013-01-01
Abstract
To ensure the safe use of ionizing radiation, thermoluminescent crystals (TL) are extensively used as passive dosimeters (TLD). However, a limited number of TL phosphors, especially for neutron dosimetry, are available. Thus, a demand exists for new materials with adapted properties for specific applications. For personal dosimetry, the material needs to present a low atomic number Zeff, similar to that of tissue (~ 7.4 for photoelectric absorption) and other features such as high sensitivity and low fading of the stored signal. In this respect, magnesium tetraborate is very promising being its main characteristics: Zeff=8,4; main TL peak around at 200°C; and sensitivity to gamma rays about 10 times higher than that of LiF.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
