Time-resolved Ax-luminescence of Nal: TI under electron pulse irradiation

V. Yakovlev, L. Trefilova, V. Alekseev, V. Krasnov

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This paper studies spectral-kinetic properties of Nal:TI cathodoluminescence registered in the region of Ax-band with maximum 425 nm within the time interval of 10-8-10-2 s. Ax-luminescence of Nal:TI crystal has been excited with an electron pulse (Ee = 0.25 MeV, t1/2 = 10 ns, W = 0.003...0.16 J/cm2) at temperatures in the range of 65-300 K. It has been found that the cathodoluminescence kinetics of Nal:TI crystal at 425 nm has beside the exponential decay (τ = 235 ns at T = 295 K) also three more components: the fastest exponential decay (τ = 12 ns at T = 78 K), post-irradiation rise on a submicrosecond time scale at T ≥ 128 K and slow exponential decay at T ≥ 160 K. A model has been suggested according to which Aj.-luminescence at 425 nm is caused by 1P1 1S0 electron transition of Tl+ ion. It has been explained that the fast decay and post-irradiated rise components are caused by 3P1 1P1 and 3P0 3P1 electron transitions of Tl+ ion, respectively. The scintillation process in Nal:TI has been discussed.

Original languageEnglish
Pages (from-to)540-545
Number of pages6
JournalFunctional Materials
Volume23
Issue number4
DOIs
Publication statusPublished - 2016

Keywords

  • Energy transfer
  • Intra-center transitions
  • Thallium-doped sodium iodide
  • Time-resolved cathodoluminescence

ASJC Scopus subject areas

  • Materials Science(all)

Fingerprint Dive into the research topics of 'Time-resolved A<sub>x</sub>-luminescence of Nal: TI under electron pulse irradiation'. Together they form a unique fingerprint.

Cite this