Search Within
Applied Filters:
Showing 1-26 of 26 results for "


" within Papers
F Bonfigli et al.
Giornale italiano di medicina del lavoro ed ergonomia, 33(3 Suppl), 391-394 (2011-07-01)
Lithium fluoride is a well known material used for dosimetry. In the last years it was proposed and tested also as imaging detector for X-ray microscopy. Optical microscopy represents the oldest and most used imaging technique for medicine and cell
Hatem Dachraoui et al.
Optics express, 19(3), 2797-2804 (2011-03-04)
We report a femtosecond crystallographic study of the dependence of the free-carries generation to the alignment of a crystalline sample to the laser polarization. The probe pulse transmission exhibits a π/2 modulation that is shown to be correlated with the
Thorsten Grünheid et al.
American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics, 141(4), 436-443 (2012-04-03)
Cone-beam computed tomography (CBCT) has become a routine imaging modality for many orthodontic clinics. However, questions remain about the amount of radiation patients are exposed to during the scans. This study determined the amounts of radiation potentially absorbed by a
A I Abd El-Hafez et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 69(10), 1533-1539 (2011-07-05)
Due to their sensitivity, signal reproducibility and stability, lithium fluoride thermoluminescence dosimeters are widely used in many applications. It was noticed that post-irradiation glow curves of LiF dosimeters that had undergone pre-irradiation background dose measurements dramatically differed from the curves
R Takam et al.
Radiation protection dosimetry, 150(1), 22-33 (2011-08-30)
(6)LiF:Mg,Cu,P and (7)LiF:Mg,Cu,P glass-rod thermoluminescent dosemeters (TLDs) were used for measurements of out-of-field photon and neutron doses produced by Varian iX linear accelerator. Both TLDs were calibrated using 18-MV X-ray beam to investigate their dose-response sensitivity and linearity. CR-39 etch-track
Zhitao Kang et al.
Health physics, 104(5), 504-510 (2013-03-28)
A glass wafer that contains cerium-activated gadolinium-based scintillator has been tested as a nuclear radiation monitor. The detector is prepared by mixing powdered gadolinium and cerium (3+) bromides with alumina, silica, and lithium fluoride, melting the mixture at 1,400°C, and
Dipankar Roy et al.
The Journal of chemical physics, 137(13), 134109-134109 (2012-10-09)
We compare dispersion and induction interactions for noble gas dimers and for Ne, methane, and 2-butyne with HF and LiF using a variety of functionals (including some specifically parameterized to evaluate dispersion interactions) with ab initio methods including CCSD(T) and
X W Meng et al.
The journal of physical chemistry. B, 115(16), 4768-4773 (2011-04-06)
On the basis of molecular dynamics simulations, we investigate water permeation across a single-walled carbon nanotube (SWCNT) under the influence of four symmetrical half-rings, each having six LiF dipolar molecules. The flux remains almost fixed as the separation, R, between
Liming Zhang et al.
Journal of nanoscience and nanotechnology, 14(6), 4710-4713 (2014-04-18)
LiYbF4:Yb, Er nanoparticles have been successfully synthesized by thermal decomposition of multiple trifluoroacetic acid salts. The SEM and TEM results show the size of the LiYF4:Yb, Er nanoparticles is about 100 nm in diagonal line, and the morphology of the
Xinmei Yang et al.
The journal of physical chemistry. A, 116(3), 985-989 (2012-01-19)
The interaction between nuclear graphite and molten fluoride salts (46.5 mol % LiF/11.5 mol % NaF/42 mol % KF) is investigated by synchrotron X-ray diffraction and C K-edge X-ray absorption near-edge structure (XANES). It is found that there are a
Peixiong Zhang et al.
Optics letters, 37(24), 5241-5243 (2012-12-22)
The use of Pr3+ codoping for enhancement of the Ho3+:5I6 →5I7 mid-IR emissions were investigated in the LiLuF4 crystal for the first time. It was found that Pr3+ greatly increased Ho3+ 2.9 μm emission by depopulating the Ho3+:5I7 level while
Paola Francisca Caprile et al.
Health physics, 104(2), 218-223 (2013-01-01)
The characteristics of the thermoluminescence glow curve and dosimetric peak of LiF:Mg,Ti (TLD-100) crystals are studied, with emphasis on the evaluation of the influence of the irradiation dose and heating rate on the dosimetric peak (peak 5) trapping parameters. These
Christian Bernhardsson et al.
Health physics, 103(6), 740-749 (2012-11-01)
Laboratory studies have shown that ordinary household salt (NaCl) exhibits several promising properties for retrospective dosimetry; e.g., a linear dose response and a low detection limit, down to a few mGy or even less. In an attempt to test NaCl
Simon Klüpfel et al.
The Journal of chemical physics, 137(12), 124102-124102 (2012-10-02)
Self-consistent calculations using the Perdew-Zunger self-interaction correction (PZ-SIC) to local density and gradient dependent energy functionals are presented for the binding energy and equilibrium geometry of small molecules as well as energy barriers of reactions. The effect of the correction
Chilin Li et al.
Nano letters, 12(3), 1241-1246 (2012-02-07)
The thermodynamically required redistribution of ions at given interfaces is being paid increased attention. The present investigation of the contact LiF/TiO(2) offers a highly worthwhile example, as the redistribution processes can be predicted and verified. It consists in Li ion
Asa Carlsson Tedgren et al.
Medical physics, 38(10), 5539-5550 (2011-10-14)
High energy photon beams are used in calibrating dosimeters for use in brachytherapy since absorbed dose to water can be determined accurately and with traceability to primary standards in such beams, using calibrated ion chambers and standard dosimetry protocols. For
Taner Aytun et al.
Nano letters, 12(1), 39-44 (2011-12-14)
Although ambient processing is the key to low-cost organic solar cell production, high-vacuum thermal evaporation of LiF is often a limiting step, motivating the exploration of solution processing of LiF as an alternative electrode interlayer. Submonolayer films are realized with
M Moscovitch et al.
Radiation protection dosimetry, 144(1-4), 161-164 (2011-04-01)
The phototransferred thermoluminescence (PTTL) technique is applied to the Harshaw LiF:Mg,Cu,P material. It is demonstrated that using 254-nm UV light, dose levels as low as 0.2 mGy can be re-estimated. The PTTL efficiency was found to be ∼ 6 %
Bernard Kirtman et al.
The Journal of chemical physics, 135(15), 154101-154101 (2011-10-28)
The large overshoot in (hyper)polarizabilities of quasilinear (1D) chains calculated by applying density functional theory with conventional functionals is investigated for several 2D and 3D extended systems. These systems include arrays of molecular hydrogen chains, as well as 2D coronene-type
Viktor Myroshnychenko et al.
Optics express, 20(10), 10879-10887 (2012-05-09)
The availability of macroscopic, nearly periodic structures known as eutectics opens a new path for controlling light at wavelength scales determined by the geometrical parameters of these materials and the intrinsic properties of their component phases. Here, we analyze the
Basile F E Curchod et al.
Chimia, 67(4), 218-221 (2013-08-24)
The implementation of local control theory using nonadiabatic molecular dynamics within the framework of linear-response time-dependent density functional theory is discussed. The method is applied to study the photoexcitation of lithium fluoride, for which we demonstrate that this approach can
Igor Rahinov et al.
Physical chemistry chemical physics : PCCP, 13(28), 12680-12692 (2011-06-17)
The Born-Oppenheimer Approximation (BOA) forms the basis for calculating electronically adiabatic potential energy surfaces, thus providing the framework for developing a molecular level understanding of a variety of important chemical problems. For surface chemistry at metal surfaces, it is now
John A Harvey et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 69(9), 1282-1286 (2011-05-13)
A computerized glow curve analysis (GCA) program for handling of thermoluminescence data originating from WinREMS is presented. The MATLAB program fits the glow peaks using the first-order kinetics model. Tested materials are LiF:Mg,Ti, CaF(2):Dy, CaF(2):Tm, CaF(2):Mn, LiF:Mg,Cu,P, and CaSO(4):Dy, with
John A Harvey et al.
Radiation protection dosimetry, 149(2), 109-115 (2011-07-08)
The effects of a controlled high temperature environment on LiF:Mg,Ti thermoluminescent dosemeters (TLDs) were investigated. TLDs were exposed to ambient temperatures of 30, 40 and 50°C. Sensitivity changes before irradiation, typically called pre-irradiation fading, and signal loss after irradiation, called
E Cruz-Zaragoza et al.
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine, 69(10), 1369-1373 (2011-06-21)
The influence of heating rate on the thermoluminescence (TL) property of LiF:Mg,Cu,P+PTFE was analyzed. The activation energy and the frequency factor as a function of the heating rate were determined. The kinetic parameters and their dependence on the heating rate
[Calibration of thermoluminescent dosimeters used for measuring the effective dose in computer tomography].
M I Zelikman et al.
Meditsinskaia tekhnika, (5)(5), 11-15 (2012-11-20)
Page 1 of 1
Page 1 of 1