“…The observed reduction of crystal light yield is similar to results of [20], which observe typical decreases of 5%, 15%, and 30% at 10 rad, 100 rad, and 1 krad, respectively, without uniformity changes for crystals from the same manufacturer. Older studies [6,21] often found higher decreases, up to 25% below ∼ 100 rad and 50% at ∼ 10 krad, probably due to higher levels of impurities in crystals [22]. All these studies used coarser steps in the applied doses.…”