Photostimulated luminescence phenomena have been observed inCe3+-doped alkali borate glasses prepared under a reducing atmosphere. When the x-ray irradiated glasses were excited by a He–Ne laser (633 nm), photostimulated luminescence at about 360 nm due to the5d–4ftransition ofCe3+ions was observed. The intensity of photostimulated luminescence of theCe3+-doped alkali borate glasses increased in the order of lithiumborate<sodium borate<potassium borate.The luminescence appears to result from the photostimulated recombination of hole and electron traps which leave electrons in a long-lived excited state. ©1997 American Institute of Physics.