| Texto completo | |
| Autor(es): |
Barros, Suelen F.
;
Vanin, Vito R.
;
Malafronte, Alexandre A.
;
Maidana, Nora L.
;
Martins, Marcos N.
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF SYNCHROTRON RADIATION; v. 25, p. 12-pg., 2018-03-01. |
| Resumo | |
Dead-time effects in X-ray spectra taken with a digital pulse processor and a silicon drift detector were investigated when the number of events at the low-energy end of the spectrum was more than half of the total, at counting rates up to 56 kHz. It was found that dead-time losses in the spectra are energy dependent and an analytical correction for this effect, which takes into account pulse pile-up, is proposed. This and the usual models have been applied to experimental measurements, evaluating the dead-time fraction either from the calculations or using the value given by the detector acquisition system. The energy-dependent dead-time model proposed fits accurately the experimental energy spectra in the range of counting rates explored in this work. A selection chart of the simplest mathematical model able to correct the pulse-height distribution according to counting rate and energy spectrum characteristics is included. (AU) | |
| Processo FAPESP: | 13/24803-5 - Medida do alinhamento atômico por impacto de elétrons pela distribuição angular de raios x L |
| Beneficiário: | Suelen Fernandes de Barros |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |