Results 181 to 190 of about 8,715 (232)

Thermoluminescence and thermoluminescence spectra of synthetic fluorapatite

Journal of Luminescence, 1980
Abstract On account of their fairly long life, alkaline earth halophosphate phosphors are still the mainstay of the fluorescent lamp industry. For higher efficiency and an increased selection of spectral distribution, with minor variation in composition and dopants, halophosphates are synthesised nowadays.
V.V. Ratnam, R. Jayaprakash, N.P. Daw
openaire   +1 more source

Analysis of Thermoluminescence of Topaz

Physica Status Solidi (a), 1984
Thermoluminescence (TL) of RT (30 °C) X-irradiated topaz shows five TL peaks in the range 30 to 500 °C. Out of these, four peaks occurring at 101, 189, 238, and 336 °C can be isolated. The TL peak occurring in the region of 450 °C which is not yet reported in literature can not be isolated because of its low intensity and high black body radiation ...
R. K. Gartia, R. Singha
openaire   +1 more source

Alumina as a Thermoluminescent Material

AIP Conference Proceedings, 2007
Thermoluminescence dosimeters are extensively used for quantitative dose measurements in various irradiation fields. They are also important for environmental monitoring after nuclear accident and weapon tests. In this work, the principles of TLD dosimeter and characteristics of several TLD materials are presented.
Yarar, Yasemin, Uzun, Erdem
openaire   +2 more sources

On the Thermoluminescence Characteristics of NAF and KCL

Applied Radiation and Isotopes, 2023
Thermoluminescence (TL) properties of NaF and KCl are investigated in order to assess their suitability as radiation dosemeters for retrospective dosimetry. TL measurements were made on samples irradiated to different doses (1-20 Gy) and heated at a rate ranging from 0.4 to 4 °C/s in a TL/OSL reader.
F O, Ogundare, M, Mashaba
openaire   +2 more sources

Thermoluminescence of Lunar Samples

Science, 1970
Appreciable natural thermoluminescence with glow curve peaks at about 350 degrees centigrade for lunar fines and breccias and above 400 degrees centigrade for crystalline rocks has been recognized in lunar samples. Plagioclase has been identified as the principal carrier of thermoluminescence, and the difference in peak temperatures indicates ...
G B, Dalrymple, R R, Doell
openaire   +2 more sources

Thermoluminescence emission spectrometer

Applied Optics, 1988
A sensitive thermoluminescence (TL) emission spectrometer based on Fourier transform spectroscopy is described. It employs a modified scanning Twyman-Green interferometer with photomultiplier detection in a photon-counting mode. The etendue is 180pi mm(2), and it covers the 350-600-nm wavelength range.
J R, Prescott, P J, Fox, R A, Akber, H E, Jensen   +3 more
openaire   +2 more sources

Thermoluminescent Properties of Topaz

Health Physics, 1978
AbstractThe possibility of using naturally occurring topaz crystals as a thermoluminescent dosimeter (TLD) was investigated. Topaz crystals are small, durable and possess thermoluminescent characteristics which compare favorably with existing commercial materials.
A L, Moss, J W, McKlveen
openaire   +2 more sources

Thermoluminescence of Biological Materials

Nature, 1970
THERMOLUMINESCENCE may be observed from many chemical compounds, both in crystalline and in amorphous form. The compounds so far investigated have usually been mineral or synthetic materials, but there is no reason to suppose that the various salts deposited in biological materials have a structure excluding this property.
M, Jasińska, T, Niewiadomski
openaire   +2 more sources

Thermoluminescence of Biological Materials

Nature, 1971
THERMOLUMINESCENCE (TL) of fossil bones and of various kinds of recent biological material has been reported by Jasinska and Niewiadomski1, who suggest that such materials could be used for dating purposes, but draw attention to difficulties which arise due to tribothermoluminescence (TTL, which is thermoluminescence derived from the mechanical energy ...
C, Christodoulides, J H, Fremlin
openaire   +2 more sources

THERMOLUMINESCENCE FROM UNIRRADIATED FLINTS: REGENERATION THERMOLUMINESCENCE

Archaeometry, 1972
ABSTRACTSThe ‘spurious’thermoluminescent glow from ground samples of flint is responsible for dating errors in the region of 10 000 years for grains less than 45 μm diameter or of 4000 years for larger grains. The glow is partly tribothermoluminescence and partly regeneration thermoluminescence and the conditions in which these arise or are accelerated
H. Y. GÖKSU, J. H. FREMLIN
openaire   +1 more source