Differential-fading optically stimulable materials for nuclear safeguards
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2019
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Safeguards agencies are concerned with the safety of nuclear installations and the security of nuclear materials. Material
protection, control, and accountancy are the first steps towards maintaining continuity of knowledge of these materials and
preventing illicit trafficking or diversion of these materials for illicit purposes. Related concerns also exist in arms control,
where the item chain of custody is important. In order to strengthen and improve the efficiency and effectiveness of existing
safeguards measures, tamperproof devices and materials are needed capable of determining elapsed time since the
undeclared movement of a source. Our group developed a new approach for surveillance based on passive, solid-state
devices. Relying on a non-electronic detection mechanism is highly desirable because complex electronic components and
circuits are potentially vulnerable to tampering and snooping. The device is a set of passive optically stimulated
luminescent detectors based on calcium sulfate doped with various rare earths. The different doping produces different
temporal fading profiles. When a source causes energy deposition in the detectors, the latter accumulate trapped electrons
that undergo de-trapping at different rates. Thus, reading them out produces a set of signals that correlates both with the
strength of the source and with the time of its passage.
Como referenciar
D’ERRICO, FRANCESCO; JUNOT, DANILO O.; POLO, IVON O.; CHIERICI, ANDREA; CIOLINI, RICCARDO; SOUZA, DIVANIZIA N.; CALDAS, LINDA V. E.; SOUZA, SUSANA O. Differential-fading optically stimulable materials for nuclear safeguards. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 3838-3843. Disponível em: http://repositorio.ipen.br/handle/123456789/30684. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.