Time build-up properties of a recently developed radiophotoluminscence (RPL) glass made of silver-activated P2O5–Al2O3–Na2O–Ag2O, named “SAPANS” herewith, were examined using 137Cs source γ-rays. It was observed that the RPL intensities of SAPANS continuously increased at room temperature and did not reach a stable state even at six months after irradiation. |