Results 141 to 150 of about 705 (160)

Thermoluminescence and Color Centers in LiF:Mg

Journal of Applied Physics, 1967
A variety of optical absorption, emission and luminescence excitation spectra have been measured in an attempt to identify the centers involved in the thermoluminescence of commercial LiF:Mg. It is concluded that the principal trapping centers consist of a hole trapped near various groupings of Mg2+ ions and vacancies.
Clifford C. Klick, Esther W. Claffy, Steven G. Gorbics, Frank H. Attix, James H. Schulman, James G. Allard   +5 more
openaire   +1 more source

Optical absorption in LiF, LiF:Mg, LiF:Mg,Cu,P irradiated with high gamma and beta doses

Radiation Measurements, 2017
Abstract We examine the optical absorption spectra of a variety of LiF materials, variously doped with Mg, Cu and/or P. Both single crystal LiF (from various sources) and LiF:MCP-N sintered pellets are examined. We follow the growth of the individual absorption bands as a function of high, gamma-photon doses and high, beta-particle doses.
K. Remy, S. Sholom, B. Obryk, S.W.S. McKeever   +3 more
openaire   +1 more source

Behaviour of LiF:Mg,Cu,P and LiF:Mg,Ti thermoluminescent detectors for electron doses up to 1MGy

Radiation Measurements, 2010
Abstract The behaviour of LiF:Mg,Cu,P and LiF:Mg,Ti detectors at ultra-high doses up to 1 MGy, has been investigated. The presence of the ultra-high-temperature peak (450 °C) of reproducible properties was observed in various batches of LiF:Mg,Cu,P, confirming earlier findings. The results indicate that this peak is not an effect of random impurities
Pawel Bilski, Barbara Obryk, Zofia Stuglik   +2 more
openaire   +1 more source

Sensitivity changes of LiF:Mg,Ti and LiF:Mg,Cu,P TL detectors after proton exposures

Radiation Measurements, 2015
Abstract Two most common types of LiF-based thermoluminescent (TL) detectors LiF:Mg,Ti (natural Li: MTS-N) and LiF:Mg,Cu,P (natural Li: MCP-N) have been studied for sensitivity loss after 60 MeV proton and gamma rays (60Co) doses ranging between 0.5 and 30 Gy.
M. Sądel, P. Bilski, J. Swakoń, M. Rydygier   +3 more
openaire   +1 more source

Role of Impurities in the Thermoluminescence of LiF:Mg,Cu,P

Radiation Protection Dosimetry, 2002
The thermoluminescent properties of lithium fluoride doped with magnesium, copper and phosphorous are reviewed. This material shows specific advantages over LiF (TLD-100) in that is has higher sensitivity, less energy dependence and no supralinear behaviour with dose.
T C, Chen, T G, Stoebe
openaire   +2 more sources

Pre- and post-irradiation fading effect for LiF:Mg,Ti and LiF:Mg,Cu,P materials used in routine monitoring

Radiation Protection Dosimetry, 2011
LiF is a well-known thermoluminescent (TL) material used in individual monitoring, and its fading characteristics have been studied for years. In the present study, the fading characteristics (for a period of 150 d) of various commercial LiF materials with different dopants have been evaluated.
E, Carinou, P, Askounis, F, Dimitropoulou, G, Kiranos, H, Kyrgiakou, E, Nirgianaki, E, Papadomarkaki, V, Kamenopoulou   +7 more
openaire   +2 more sources

Time-resolved spectroscopy of LiF:Mg,Cu,P

Radiation Protection Dosimetry, 2006
Time-resolved spectroscopy measurements of LiF:Mg,Cu,P luminescence are presented to obtain a better understanding of the emission characteristics of this material. The intensities and decay of the emission bands were studied as a function of annealing temperature and ionising radiation (gamma) dose.
V K, Mathur, J H, Barkyoumb, Andrew, Jarrett   +2 more
openaire   +2 more sources

Low temperature radioluminescence of LiF:Mg,Cu,P

Radiation Protection Dosimetry, 2006
Low temperature radioluminescence spectra of LiF, variously co-doped with Mg, Cu and P, show highly unusual temperature dependencies which resemble thermoluminescence data. The signals include intense peaks and a relatively weak continuous background. One peak occurs below 30 K, together with a major peak near 125 K. The signals are highly sensitive to
K, Kurt, V K, Mathur, S W S, McKeever, P D, Townsend, L, Valberg   +4 more
openaire   +2 more sources

The Annealing Characteristics of LiF:Mg,Ti

Radiation Protection Dosimetry, 1990
New data concerning some of the standard annealing procedures routinely applied to LiF:Mg,Ti, especially the influence of the reproductibility of the annealing temperature profiles on the dosimetric precision, are presented. Based on these investigations, and based on the criterion that the annealing should be carried out at a temperature where the TL ...
openaire   +1 more source

Low Temperature Studies in LiF:Mg,Cu,P

Radiation Protection Dosimetry, 2002
Despite extensive investigations carried out in LiF:Mg,Cu,P, the nature of the emission centre is not clearly understood. Results of X ray excited emission in this material at room temperature and at 16 K are presented to obtain more data that can throw light on the emission characteristics of this material.
V K, Mathur, P K, Bandyopadhyay, J H, Barkyoumb, G G, Cai   +3 more
openaire   +2 more sources