@article {Zhou:2014:2158-5849:324,
title = "Room temperature luminescence properties of Pr3 + doped -PbF2 powders",
journal = "Materials Express",
parent_itemid = "infobike://asp/me",
publishercode ="asp",
year = "2014",
volume = "4",
number = "4",
publication date ="2014-08-01T00:00:00",
pages = "324-330",
itemtype = "ARTICLE",
issn = "2158-5849",
url = "https://www.ingentaconnect.com/content/asp/me/2014/00000004/00000004/art00007",
doi = "doi:10.1166/mex.2014.1177",
keyword = "LUMINESCENCE, PBF2, PR3+, DECAY TIME, HHCAL",
author = "Zhou, Zhenzhen and Wei, Qinhua and Liu, Guanghui and Fei, Fan and Yang, Hua and Liu, Qian",
abstract = "Low cost cubic lead fluoride (-PbF2) is an attractive light-emitting material for dual readout purpose in homogeneous hadronic calorimeter (HHCAL), and introducing available scintillation light in PbF2 is desperately needed. Among rare earth ions RE3+,
Pr3+ ions usually show a unique fast and broad electric dipole allowed 5d4f emission transition in luminescent inorganic materials. In this work, Pr3+ doped and Pr3+, Li+ co-doped -PbF2 powders of Pb1
x
Pr
x
F2+
(x = 0.1%, 0.5%, 1%, 3%, 5%) and Pb0.995
y
Pr0.005Li
y
F2+
(y = 0.3%, 0.5%, 1%, 3%, 5%) were synthesized by solid state reaction in vacuum tube furnace to obtain a fast light. Typical 4f4f
emission transitions of Pr3+ ions were observed under 3H4
3P2 excitation in Pb1
x
Pr
x
F2+
samples. Only 4f4f emission transitions were observed under
4f5d excitation because of the nonradiative relaxation of the 5d level into the lower 4f levels due to the low 4f5d excitation transition energy (4.28 eV) of the Pr3+ ions in Pb1
x
Pr
x
F2+
samples. The co-doping of monovalent Li ions can increase the luminescent intensity of Pr3+ ions in PbF2 host owing to the charge compensation. The decay time monitoring the 481 nm (under 4f5d excitation) and 483 nm (under3H4-3P2
excitation) emission of Pr3+ ions in PbF2 host is 17.5 and 24.9 s, respectively.",
}