Standardization and measurement of gamma-ray probability per decay of 177Lu
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Applied Radiation and Isotopes
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Resumo
The procedure followed by the Nuclear Metrology Laboratory (LMN), at the Nuclear and Energy Research
Institute (IPEN), for the primary standardization of 177Lu is described. This radionuclide is widely used in
radiopharmacy due to its convenient half-life and emitted beta ray energies. The 177Lu solution was supplied
during an international comparison sponsored by BIPM in 2009 and the primary standardization has been
accomplished by the 4pb-g coincidence method using a proportional counter in 4p geometry coupled with
two NaI(Tl) scintillation counters. The beta efficiency was varied by placing Collodion and aluminum
absorbers over and under the radioactive source. The 177Lu calibrated sources were also measured in a
previously calibrated HPGe spectrometer, in order to obtain the emission probability per decay for the
selected gamma-ray transitions. The experimental extrapolation curves were also compared with Monte
Carlo simulations by means of code ESQUEMA developed at the LMN.
Como referenciar
DIAS, MAURO S.; SILVA, FABRICIO F.V.; KOSKINAS, MARINA F. Standardization and measurement of gamma-ray probability per decay of 177Lu. Applied Radiation and Isotopes, v. 68, n. 7-8, p. 1349-1353, 2010. DOI: 10.1016/j.apradiso.2009.12.023. Disponível em: http://repositorio.ipen.br/handle/123456789/4594. 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.
Assuntos
aluminium; coincidence methods; comparative evaluations; computerized simulation; efficiency; emission; extrapolation; gamma radiation; half-life; high-purity ge detectors; lutetium 177; monte carlo method; nai detectors; nuclear decay; probability; proportional counters; radiation sources; standardization