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pro vyhledávání: '"R.B. Galloway"'
Autor:
R.B. Galloway
Publikováno v:
Radiation Measurements. 37:177-185
An empirical study of luminescence around 360 nm from limestone is presented. Thermoluminescence glow curves from natural limestone show broad peaks at 440°C, 350°C, 530°C and 286°C in order of decreasing amplitude in contrast to the usual observ
Autor:
R.B. Galloway
Publikováno v:
Radiation Measurements. 35:67-77
It is well known that the thermal history of a quartz sample influences the optically stimulated luminescence sensitivity of the quartz. It is found that the optically stimulated luminescence lifetime, determined from time resolved spectra obtained w
Autor:
R.B. Galloway, M.L. Chithambo
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 183:358-368
Characteristics of luminescence lifetimes and luminescence intensity from quartz have been studied as a function of temperature at long stimulation times (the `slow component' region). In this region, luminescence lifetime values are strongly affecte
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 173:533-540
Determination of a natural equivalent dose was simulated using sets of bleached and heated quartz given a known artificial beta dose. Two different beta doses were used for the tests. The additive multiple aliquot procedure was applied to determine t
Autor:
M.L. Chithambo, R.B. Galloway
Publikováno v:
Radiation Measurements. 32:627-632
Pulsed optical stimulation of luminescence has been used to study the thermal dependence of luminescence lifetimes in quartz over the temperature range 20–200°C. Time-resolved spectra for lifetime analysis were recorded from samples of quartz over
Autor:
R.B. Galloway, M.L. Chithambo
Publikováno v:
Radiation Measurements. 32:621-626
In this paper we present results of investigations concerning the time dependence of luminescence emission relative to the time of stimulation in quartz. Measurements of time-resolved spectra were performed on a new versatile pulsed light emitting di
Autor:
R.B. Galloway
Publikováno v:
Radiation Measurements. 32:703-707
Repeated stimulation by infrared of a feldspar sample causes a reduction in the luminescence signal. The initial rate of loss of luminescence due to infrared stimulation is investigated for a microcline and an orthoclase with preheating at 150°C, 18
Autor:
R.B. Galloway
Publikováno v:
Radiation Measurements. 30:739-751
Repeated heating and stimulation by infrared of feldspar samples causes a reduction in the luminescence signal. Two feldspars were investigated, one microcline and one orthoclase. Empirically the fraction of luminescence signal f ( n ) remaining afte
Publikováno v:
Radiation Measurements. 30:497-504
The thermoluminescence from a French limestone shows peaks in the glow curve at 142±11, 164±14, 194±11, 286±10 and 360±10°C measured at a heating rate of 5.2°C s−1. The bleaching and phototransfer properties of these peaks are presented for
Autor:
R.B. Galloway
Publikováno v:
Applied Radiation and Isotopes. 48:273-286
A plastic scintillator system for beta particle counting, with automatic sample changer, has been employed to determine the depth dependence of radioactivity at approx. 2 cm intervals along a 6.5 sediment core from Lac du Bouchet in France. The relia