<i>Fluorescence and Phosphorescence</i>

Pringsheim, Peter; Schulman, James H.

doi:10.1063/1.3066675

Cited by 58 publications

(74 citation statements)

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“…While some of the compounds listed in Table 3 have been known as fluorescent materials for some time [10,11], this does not necessarily mean that they are useful as scintillators because (i) some compounds have radiative transitions that are excited much more efficiently by UV radiation than by x-rays and (ii) some compounds exhibit a fluorescence after UV or x-ray excitation that originates only from the surface and photons produced by excitation deep in the crystal (such as by gamma radiation) are absorbed in the bulk of the crystal by radiation trapping and lost by non-radiative processes. For this reason, many powders listed in Table 1 require further study in crystal form before they can be established as useful scintillators.…”

Section: Fluorescent Lifetimes and Wavelengthsmentioning

confidence: 99%

Prospects for new inorganic scintillators

Derenzo

Moses

Cahoon

et al. 1990

IEEE Trans. Nucl. Sci.

109

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[ [ ) . frJ r;y;)Prepared for the U.S. Department of Energy under Contract Number DE-AC03-76SF00098..... DISCLAIMERThis document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor the Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by its trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof, or the Regents of the University of California. ABSTRACTAlthough scintillation has been discovered in many inorganic crystals during the past 40 years, there is continued interest in finding compounds with improved scintillation properties. However, the testing of candidate compounds has thus far been limited to those available as crystals of suitable quality and size. We describe a method using synchrotron x-radiation for measuring the fluorescence properties of powders, which makes accessible a much larger number of compounds. We present results for 85 compounds tested by this method. Scintillation from several compounds was discovered, notably CeF3 and PbC03.

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Section: Fluorescent Lifetimes and Wavelengthsmentioning

confidence: 99%

Prospects for new inorganic scintillators

Derenzo

Moses

Cahoon

et al. 1990

IEEE Trans. Nucl. Sci.

109

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“…It is attributed to Gd by the same author. Pringsheim [12] reported that Gd alone is not fluorescent in SrS. In present case no emission line is observed.…”

Section: Gadolinium Impuritymentioning

confidence: 43%

Emission Spectra of Triple Activated SrS Phosphors

Rao¹,

Sinha²,

Machwe³

et al. 1996

Acta Phys. Pol. A

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“…In addition, a relatively weak Raman doublet (1284 and 1388 cm −1 ) of CO 2 is also visible in the spectrum (figure 4). The broad band at approximately 667.7 nm and the sharp R 1 and R 2 lines are fluorescence emission from trace amounts of Cr 3+ impurity in the sapphire window (Pringsheim 1949). In RS, the n 1 totally symmetric stretching vibration of CO 2 (1305.4 cm −1 ) is active for the isolated molecule (e.g.…”

Section: Resultsmentioning

confidence: 99%

Time-resolved remote Raman study of minerals under supercritical CO ₂ and high temperatures relevant to Venus exploration

Sharma

Misra

Clegg

et al. 2010

Phil. Trans. R. Soc. A.

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We report time-resolved (TR) remote Raman spectra of minerals under supercritical CO 2 (approx. 95 atm pressure and 423 K) and under atmospheric pressure and high temperature up to 1003 K at distances of 1.5 and 9 m, respectively. The TR Raman spectra of hydrous and anhydrous sulphates, carbonate and silicate minerals (e.g. talc, olivine, pyroxenes and feldspars) under supercritical CO 2 (approx. 95 atm pressure and 423 K) clearly show the well-defined Raman fingerprints of each mineral along with the Fermi resonance doublet of CO 2 . Besides the CO 2 doublet and the effect of the viewing window, the main differences in the Raman spectra under Venus conditions are the phase transitions, the dehydration and decarbonation of various minerals, along with a slight shift in the peak positions and an increase in line-widths. The dehydration of melanterite (FeSO 4 · 7H 2 O) at 423 K under approximately 95 atm CO 2 is detected by the presence of the Raman fingerprints of rozenite (FeSO 4 · 4H 2 O) in the spectrum. Similarly, the high-temperature Raman spectra under ambient pressure of gypsum (CaSO 4 · 2H 2 O) and talc (Mg 3 Si 4 O 10 (OH) 2 ) indicate that gypsum dehydrates at 518 K, but talc remains stable up to 1003 K. Partial dissociation of dolomite (CaMg(CO 3 ) 2 ) is observed at 973 K. The TR remote Raman spectra of olivine, a-spodumene (LiAlSi 2 O 6 ) and clino-enstatite (MgSiO 3 ) pyroxenes and of albite (NaAlSi 3 O 8 ) and microcline (KAlSi 3 O 8 ) feldspars at high temperatures also show that the Raman lines remain sharp and well defined in the high-temperature spectra. The results of this study show that TR remote Raman spectroscopy could be a potential tool for exploring the surface mineralogy of Venus during both daytime and nighttime at short and long distances.

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Fluorescence and Phosphorescence

Cited by 58 publications

References 0 publications

Prospects for new inorganic scintillators

Prospects for new inorganic scintillators

Emission Spectra of Triple Activated SrS Phosphors

Time-resolved remote Raman study of minerals under supercritical CO ₂ and high temperatures relevant to Venus exploration

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Fluorescence and Phosphorescence

Cited by 58 publications

References 0 publications

Prospects for new inorganic scintillators

Prospects for new inorganic scintillators

Emission Spectra of Triple Activated SrS Phosphors

Time-resolved remote Raman study of minerals under supercritical CO 2 and high temperatures relevant to Venus exploration

Contact Info

Product

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About

Time-resolved remote Raman study of minerals under supercritical CO ₂ and high temperatures relevant to Venus exploration