Scintillation and thermoluminescent properties of Dy-doped calcium borate chloride

Abstract

Calcium borate chlorides (Ca 2 BO 3 Cl) with different concentrations of Dy 3+ were fabricated by the conventional solid-state reaction with an aim to develop themoluminescent materials for radiation dosimetry, and their scintillation and thermally-stimulated luminescence (TSL) properties were evaluated systematically. Several scintillation peaks at approximately 485, 580 and 675 nm due to the 4f-4f transitions of Dy 3+ appeared in the Dy 3+ -doped Ca 2 BO 3 Cl, and the 1.0% Dy 3+ -doped Ca 2 BO 3 Cl showed the highest scintillation intensity. In the temporal scintillation profiles, the decay time constants of the Dy 3+ -doped Ca 2 BO 3 Cl were about 0.6 ms, which was a typical value for the 4f-4f transitions of Dy 3+ . Furthermore, the Dy 3+ -doped Ca 2 BO 3 Cl showed efficient TSL with glow peaks at 110 and 250 °C originating from the 4f-4f transitions of Dy 3+ . Among the sample investigated, the 1.0% Dy 3+ -doped Ca 2 BO 3 Cl exhibited the highest TSL intensity, and the linear dose response of the TSL glow peak at 250 °C was confirmed to be in the dose range from 0.1 to 100 mGy for the 1.0% Dy 3+ -doped Ca 2 BO 3 Cl. • Dy-doped calcium borate chlorides were fabricated by the conventional solid-state reaction for radiation dosimetry. • The chlorides showed efficient TSL due to the 4f-4f transitions of Dy 3+ with a glow peak at 250 °C. • Linear TSL dose response was confirmed to be in the dose range from 0.1 to 100 mGy.