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SUMMARY:LUMINESCENT SPECTROSCOPY OF Pr3+ IONS IN SOME PHOSPHATES\, BORATES
  AND SILICATES USING X-RAY SYNCHROTRON RADIATION FROM VEPP-3 STORAGE RING
DTSTART;VALUE=DATE-TIME:20200715T101000Z
DTEND;VALUE=DATE-TIME:20200715T103000Z
DTSTAMP;VALUE=DATE-TIME:20260417T095801Z
UID:indico-contribution-1852@indico.inp.nsk.su
DESCRIPTION:Speakers: Sviatoslav Kiselev (Ural Federal University)\nLUMINE
 SCENT SPECTROSCOPY OF Pr${}^{3+}$ IONS IN SOME PHOSPHATES\, BORATES AND SI
 LICATES USING X-RAY SYNCHROTRON RADIATION FROM VEPP-3 STORAGE RING\n\nKise
 lev S.A.${}^{1\,\\ a)}$\, Pustovarov V.A.${}^{1\,\\ b)}$ and Bettinelli M.
 ${}^{2\,\\ c}$${}^{)}$\n\n${}^{1}$Institute of Physics and Technology\, Ur
 al Federal University\, 19 Mira st.\, Ekaterinburg\, 620002\, Russia\n\n${
 }^{2\\ }$Laboratory of Luminescent Materials\, Department of Biotechnology
 \, University of Verona and  INSTM\, UdR Verona\, Strada Le Grazie 15\, I-
 37134 Verona\, Italy\n${}^{a)}$Corresponding author: sviat-kiselev@yandex.
 ru\n${}^{b)}$v.a.pustovarov@urfu.ru \n${}^{c}$${}^{)}$ marco.bettinelli@un
 ivr.it \n\n\n This paper reports the spectroscopic properties of praseodym
 ium-doped phosphates\, borates and silicates. Spectra of X-ray excited lum
 inescence and its decay kinetics were measured. Studied samples demonstrat
 e interconfigurational 5$d$-4$f$\, intraconfigurational 4$f$-4$f$ transiti
 ons and defect-related luminescence. Comparative analysis of spectroscopic
  properties and application perspectives is presented.\n\nInorganic scinti
 llating materials are being actively investigated in terms of their applic
 ation in fields of nuclear physics\, medicine tomography and detecting sys
 tems. Ce${}^{3+}$ ions impurity are widely used\, but praseodymium ions ar
 e able to shift the emission spectra of interconfigurational transitions t
 o higher energy region. The Pr${}^{3+}$ 5$d$-4$f$ emission appears\, when 
 a sufficiently strong crystal field shifts the lowest 4$f$${}^{1}$5$d$${}^
 {1}$ excited state below the ${}^{1}$S${}_{0}$ level [1].\n\nPolycrystalli
 ne samples KLuP${}_{2}$O${}_{7}$\, Li${}_{6}$Y(BO${}_{3}$)${}_{3}$\, LiY${
 }_{6}$O${}_{5}$(BO${}_{3}$)${}_{3}$\, LiSrPO${}_{4}$\, Sr${}_{9}$Sc(PO${}_
 {4}$)${}_{7}$\, K${}_{3}$Lu(PO${}_{4}$)${}_{2}$\, K${}_{3}$LuSi${}_{2}$O${
 }_{7}$ doped with Pr${}^{3+}$ ions were synthesized using a solid state re
 action and XRD verified for phase purity at the Laboratory of Luminescent 
 Materials\, University of Verona (Italy). \n\nThe measurements of emission
  spectra and luminescence decay kinetics upon excitation with non-monochro
 matic X-ray synchrotron radiation (E = 3--60 keV\, pulse FWHM $\\mathrm{\\
 sim}$ 1 ns\, frequency $\\mathrm{\\sim}$ 8 MHz) were performed at the beam
 line \\#6 of the VEPP-3 storage ring at Budker Institute of Nuclear Physic
 s (Russia). Stroboscopic method of electron-optical chronography with sub-
 nanosecond time resolution was used. The detection system included a SOL I
 nstruments MS2004 monochromator equipped with a high-speed LI-602 dissecto
 r [2].\n\nFor example\, Fig. 1\, (a) demonstrate spectra of X-ray excited 
 luminescence of some studied samples\, LiSrPO${}_{4}$:Pr${}^{3+}$\, K${}_{
 3}$LuSi${}_{2}$O${}_{7}$:Pr${}^{3+}$ and Li${}_{6}$Y(BO${}_{3}$)${}_{3}$:P
 r${}^{3+}$. Two principal regions can be observed there: 220-350 nm -- reg
 ion of interconfigurational 5$d$-4$f$ transitions in Pr${}^{3+}$ impurity 
 ions\, and 480-650 nm -- region of intraconfiguration 4$f$-4$f$ transition
 . Decay kinetics of interconfigurational radiation transitions are present
 ed in Fig. 2\, (b). Each of them can be approximated with multiexponential
  description  I(t) = $\\mathit{\\Sigma}$(A${}_{i}$*exp(-t/$\\tau$${}_{i}$)
  + I${}_{0}$. Obtained luminescence lifetime parameter $\\tau$${}_{i}$ is 
 vital for understanding of luminescence dynamics. \n\n[Figure1][1]\n\nFIGU
 RE 1. Spectra (a) and kinetics (b) of X-ray excited luminescence\,T = 295 
 K. The wavelength and the main lifetime $\\tau$${}_{i}$ are indicated when
  measuring the luminescence decay kinetics\n\n1. A.M. Srivastava\, ``Aspec
 ts of Pr${}^{3+}$ luminescence in solids\,'' J. Lumin.\, vol.  169\, pp. 4
 45-449\, January 2016.\n\n2. V.A. Pustovarov\, E.I. Zinin\, A.L. Krymov an
 d B.V. Shulgin\, ``Some peculiarities of the luminescence of inorganic sci
 ntillators under excitation by high intensity synchrotron radiation\,'' Re
 v. Sci. Instrum.\, vol.  63\, pp. 3521\, September 1992.\n\n\n  [1]: https
 ://yadi.sk/i/8Et_AOfSitR60g\n\nhttps://indico.inp.nsk.su/event/24/contribu
 tions/1852/
LOCATION:Zoom Zoom 860 5034 1820
URL:https://indico.inp.nsk.su/event/24/contributions/1852/
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