Funct. Mater. 2016; 23 (4): 540-545.

https://doi.org/10.15407/fm23.04.364

Time-resolved Ax-luminescence of NaI:Tl under electron pulse irradiation

V.Yakovlev1, L.Trefilova2, V.Alekseev3, V.Krasnov3

1Tomsk Polytechnic University, 30 Lenin Ave., 634034 Tomsk, Russian Federation
2National University of Civil Protection, 94 Chernyshevska Str., 61023 Kharkiv, Ukraine
3Institute for Scintillation Materials, STC Institute for Single Crystals, National Academy of Sciences of Ukraine, 60 Nauky Ave., 61001 Kharkiv, Ukraine

Abstract: 

This paper studies spectral-kinetic properties of NaI:Tl 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 NaI:Tl 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 NaI:Tl 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 Ax-luminescence at 425 nm is caused by 11→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<m^>+ ion, respectively. The scintillation process in NaI:Tl has been discussed.

Keywords: 
Thallium-doped sodium iodide; time-resolved cathodoluminescence; energy transfer; intra-center transitions.

Full text in PDF

References: 

1. I.K.Plyavin, Opt. Spektr., 7, 71 (1959).

2. M.P.Fontana, W.J.Van Sciver, Phys. Rev., 168, 960 (1968). https://doi.org/10.1103/PhysRev.168.960

3. R.G.Kaufman, W.B.Hadley, H.N.Hersh, IEEE Trans. Nucl. Sci., 17, 82 (1970). https://doi.org/10.1109/TNS.1970.4325679

4. H.B.Dietrich, A.E.Purdy, R.B.Murray, R.T.Williams, Phys. Rev. B, 8, 5894 (1973). https://doi.org/10.1103/PhysRevB.8.5894

5. M.Ishikane, M.Kawanishi, Jap. J. Appl. Phys., 14, 64 (1975). https://doi.org/10.1143/JJAP.14.64

6. H.Nishimura, T.Kubota, M.Tomura, J. Phys. Soc. Jap., 42, 175 (1977). https://doi.org/10.1143/JPSJ.42.175

7. B.S.Alexandrov, K.D.Ianakiev, P.B.Littlewood, Nucl. Instr. Meth. Phys. Res. A, 358, 432 (2008). https://doi.org/10.1016/j.nima.2007.12.010

8. R.G.Deich, M.S.Abdrakhmanov, D.P.Erts, A.P.Kuyanov, Sol. Stat. Com., 80, 63 (1991). https://doi.org/10.1016/0038-1098(91)90599-Q

9. K.D.Ianakiev, B.S.Alexandrov, P.B.Littlewood, M.C.Browne, Nucl. Instr. Meth. Phys. Res. A, 607, 432 (2009). https://doi.org/10.1016/j.nima.2009.02.019

10. L.Trefilova, V.Yakovlev, A.Meleshko, N.Kosinov, Radiat. Meas., 45, 328 (2010). https://doi.org/10.1016/j.radmeas.2009.10.099

11. M.Henderson. L.J.Curtis, J. Phys. B: At. Mol. Opt. Phys., 29, L629 (1996). https://doi.org/10.1088/0953-4075/29/17/001

12. T.Brage, D.S.Leckrone, C.Froese Fischer, Phys. Rev. A, 53, 192 (1996). https://doi.org/10.1103/PhysRevA.53.192

13. D.R.Beck, Z.Cai, Phys. Rev. A, 41, 301 (1990). https://doi.org/10.1103/PhysRevA.41.301

14. J.Migdalek, W.E.Baylis, J. Phys. B: At. Mol. Phys., 18, 1533 (1985). https://doi.org/10.1088/0022-3700/18/8/012

15. J.Migdalek, A.Bojara, J. Phys. B: At. Mol. Opt. Phys., 21, 2221 (1988). https://doi.org/10.1088/0953-4075/21/12/009

16. B.P.Das, M.Idrees, Phys. Rev. A, 42, 6900 (1990). https://doi.org/10.1103/PhysRevA.42.6900

17. H.S.Chou, K.N.Huang, Phys. Rev. A, 45, 1403 (1992). https://doi.org/10.1103/PhysRevA.45.1403

18. R.Illingworth, Phys. Rev. V, 236, A508 (1964). https://doi.org/10.1103/PhysRev.136.A508

19. M.F.Trinkler, I.K Plyavin, Phys. Stat. Sol., 11, 277 (1965). https://doi.org/10.1002/pssb.19650110125

20. M.P.Fontana, W.J.Van Sciver, H.Blume, Abstr., Intern. Symposium, Rome, September 23-27 (1968), p.99.

21. V.Yakovlev, L.Trefilova, A.Meleshko, Yu.Ganja, J. Luminescence., 131, 2579 (2011). https://doi.org/10.1016/j.jlumin.2011.06.037

22. R.D.Popp, R.B.Murray, J. Phys. Chem. Sol., 33, 601 (1972). https://doi.org/10.1016/0022-3697(72)90069-8

23. D.Shoemaker, Phys. Rev. B, 7, 786 (1973). https://doi.org/10.1103/PhysRevB.7.786

24. R.G.Deich, Izvestiya Akademii Nauk Latviiskoi SSR, Seriya Fiz. -Tekh. Nauk, 2, 51 (1981).

25. V.Yakovlev, L.Trefilova, A.Meleshko, J. Luminescence., 129, 790 (2009). https://doi.org/10.1016/j.jlumin.2009.02.012

26. E.D.Aluker, R.G.Deich, C.A.Chernov, Problems Atomic Science and Technology, Ser. Phys. Rad. Damages and Rad. Mat. Science, 2, 63 (1982).

Current number: