A factor of 40 boost of BaF2 scintillation light yield after electron radiation was reported in this paper. The experiment was done long time along. Is this observation confirmed by anyone else?
Article Amplified spontaneous emission of a BaF2 crystal
Dear Jing,
I don't know about BaF2 single crystals, but there are several reports which connect improvements in the light yield/steady state radio-luminescence in scintillators to irradiation with ionizing radiation. This increase in efficiency is substantially related to filling of traps.
You can have a look to the two attachments an references therein.
Cheers,
Federico
Article Radioluminescence Sensitization in Scintillators and Phospho...
Article Light yield sensitization by X-ray irradiation in BaAl4O7:Eu...
At first I fully agree with Dr. Morreti. Of course the theory of energy-gap filling in scintillators or semiconductor detectors is, by far, not to a final stage.
On the other hand, if the BaF2 crystals are not something crucial, you may try other crystals even for TOFPET.
In case not known, you may find several in these reviews:
Van Eijk CWE (2008) Radiation detector developments in medical applications: inorganic scintillators in positron emission tomography. Rad Prot Dosim 129(1-3): 13-21.4.
Lewellen TK (2008) Recent developments in PET detector technology. Phys Med Biol 53: R287–R317.
Other useful papers are the following:
Geramifar P, Ay MR, Shamsaie Zafarghandi M, Sarkar S, Loudos G. et al. (2011) Investigation of time-of-flight benefits in an LYSO-based PET/CT scanner:A Monte Carlo study using GATE. Nucl. Instrum. Meth. (A) 641: 121-127.
Shimizu S, Pepin CM,.Lecomte R (2010) Assessment of Lu1:8Gd0:2SiO5 (LGSO) Scintillators with APD Readout for PET/SPECT/CT Detectors. IEEE T Nucl Sci 57: 1512-1517.
BaF2 doping Cd very increased scintillation light yield after electron radiation.I think in this paper used doping BaF2 not pure...
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