Radiation-induced changes in the optical properties of NaMgF 3 (Sm): Observation of resettable Sm radio-photoluminescence
Source abstract
Abstract
Abstract Stable radio-photoluminescence (RPL) is observed in NaMgF3(Sm) after X-ray irradiation due to valence conversion of Sm3+ to Sm2+. This valence conversion can be reversed by deep UV (254 nm) illumination. It is likely that this reversible process occurs via defects near some of the Sm3+ sites that act as hole traps. The ratio of the Sm2+/Sm3+ RPL emissions follows an exponential-type curve dependence on X-ray dose where the ratio saturates above ∼500 Gy. Optically stimulated luminescence (OSL) is also observed but only from Sm3+ and primarily from electrons trapped at F-centers. The OSL response is demonstrated to be linear up to 100 Gy. Thus, NaMgF3(Sm) has potential as a dosimeter where individual irradiations can be monitored via OSL and the total cumulative dose via non-destructive RPL readout. The RPL can be optically reset when required.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Luminescence Properties of Advanced Materials · Inorganic Fluorides and Related Compounds · Ga2O3 and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (32)
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