Determination of the forces affecting the particles and their trajectories in the surroundings of the matrix element in a magnetic separator

2016 ◽  
Vol 1 (6) ◽  
pp. 112-115
Author(s):  
Ryszard GOLEMAN
Keyword(s):  
Matrix Element ◽  
Magnetic Separator ◽  
The Matrix

Determination of the matrix element of the quasi-momentum operator in the zero-gap semiconductor HgSe by the field-effect method in electrolyte

2002 ◽  
Vol 36 (4) ◽  
pp. 390-393
Author(s):  
O. Yu. Shevchenko ◽  
V. F. Radantsev ◽  
A. M. Yafyasov ◽  
V. B. Bozhevol’nov ◽  
I. M. Ivankiv ◽  
...  
Keyword(s):  
Matrix Element ◽  
Field Effect ◽  
Momentum Operator ◽  
Quasi Momentum ◽  
The Matrix ◽  
Effect Method

scholarly journals Determination of trace silicon in high purity nickel using a masking reagent for the matrix element.

1994 ◽  
Vol 43 (4) ◽  
pp. 289-293 ◽  
Author(s):  
Masayoshi KIYOKAWA ◽  
Hitoshi YAMAGUCHI ◽  
Ryosuke HASEGAWA
Keyword(s):  
Matrix Element ◽  
High Purity ◽  
The Matrix

scholarly journals Determination of the time scale of photoemission from the measurement of spin polarization

2018 ◽  
Vol 5 (6) ◽  
Author(s):  
Mauro Fanciulli ◽  
Hugo Dil
Keyword(s):  
Experimental Data ◽  
Time Delay ◽  
Matrix Element ◽  
Spin Polarization ◽  
Time Delays ◽  
Upper And Lower Bounds ◽  
Recent Experimental Data ◽  
The Matrix ◽  
Phase Term

The Eisenbud-Wigner-Smith (EWS) time delay of photoemission depends on the phase term of the matrix element describing the transition. Because of an interference process between partial channels, the photoelectrons acquire a spin polarization which is also related to the phase term. The analytical model for estimating the time delay by measuring the spin polarization is reviewed in this manuscript. In particular, the distinction between scattering EWS and interfering EWS time delay will be introduced, providing an insight in the chronoscopy of photoemission. The method is applied to the recent experimental data for Cu(111) presented in M. Fanciulli et al., PRL 118, 067402 (2017), allowing to give better upper and lower bounds and estimates for the EWS time delays.

scholarly journals Application of k0-method of neutron activation analysis for determination of trace elements in various mineral samples: a review

2015 ◽  
Vol 34 (1) ◽  
pp. 169 ◽  
Author(s):  
Radojko Jacimovic ◽  
Trajce Stafilov ◽  
Vekoslava Stibilj ◽  
Milena Taseska ◽  
Petre Makreski
Keyword(s):  
Trace Elements ◽  
Neutron Activation Analysis ◽  
Matrix Element ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Geological Materials ◽  
Different Types ◽  
The Matrix ◽  
The Republic

<p>Various trace elements in different types of arsenic (orpiment, As<sub>2</sub>S<sub>3</sub>; realgar, As<sub>4</sub>S<sub>4</sub>; lorandite, TlAsS<sub>2</sub>), antimony (stibnite, Sb<sub>2</sub>S<sub>3</sub>), copper (brochantite, Cu<sub>4</sub>SO<sub>4</sub>(OH)<sub>6</sub>; chalcanthite, CuSO<sub>4</sub>·5H<sub>2</sub>O; chalcopyrite, CuFeS<sub>2</sub>; covellite, CuS; native copper, Cu) and iron based geological materials (hematite, Fe<sub>2</sub>O<sub>3</sub>; pyrite, FeS<sub>2</sub>; chalcopyrite, CuFeS<sub>2</sub>) were determined using <em>k</em><sub>0</sub>-method of neutron activation analysis (<em>k</em><sub>0</sub>-NAA) in both forms: instrumental (<em>k</em><sub>0</sub>-INAA) and radiochemical (<em>k</em><sub>0</sub>-RNAA). In order to avoid interferences from the matrix element (As, Sb, Cu and Fe), various procedures were applied for its removal. Elimination of the matrix element enabled investigation from 35 to 47 trace elements in the samples using short (up to few minutes) and long (up to 20 hours) irradiations in typical irradiation channels of TRIGA reactor. The minerals were collected from various localities within the Republic of Macedonia, except covellite, which was obtained from Bor, Serbia.</p>

Determination of the square of the matrix element for the dipole moment of the electronic transition A2?-X2? of the BO molecule

1974 ◽  
Vol 20 (3) ◽  
pp. 373-376
Author(s):  
N. E. Kuz'menko ◽  
L. A. Kuznetsova ◽  
Yu. Ya. Kuzyakov ◽  
B. N. Chuev
Keyword(s):  
Dipole Moment ◽  
Matrix Element ◽  
Electronic Transition ◽  
The Matrix

scholarly journals Effect of the Matrix Element on the Determination of Tramp Elements in Iron and Steel by ICP-OES: The Usefulness of the Matrix Removal

2007 ◽  
Vol 93 (2) ◽  
pp. 190-194 ◽  
Author(s):  
Kunio TAKADA ◽  
Tetsuya ASHINO ◽  
Tsutomu SYOJI ◽  
Toshiko ITAGAKI ◽  
Kazuaki WAGATSUMA
Keyword(s):  
Matrix Element ◽  
Icp Oes ◽  
Iron And Steel ◽  
The Matrix ◽  
Matrix Removal

Lateral resolution of the electron microbeam analysis

1978 ◽  
Vol 36 (1) ◽  
pp. 542-543
Author(s):  
H.J. Dudek
Keyword(s):  
Quantitative Analysis ◽  
Depth Resolution ◽  
Lateral Resolution ◽  
Cylindrical Particle ◽  
Correction Procedure ◽  
X Ray ◽  
Element Concentrations ◽  
Microbeam Analysis ◽  
The Matrix

The chemical inhomogenities in modern materials such as fibers, phases and inclusions, often have diameters in the region of one micrometer. Using electron microbeam analysis for the determination of the element concentrations one has to know the smallest possible diameter of such regions for a given accuracy of the quantitative analysis.In th is paper the correction procedure for the quantitative electron microbeam analysis is extended to a spacial problem to determine the smallest possible measurements of a cylindrical particle P of high D (depth resolution) and diameter L (lateral resolution) embeded in a matrix M and which has to be analysed quantitative with the accuracy q. The mathematical accounts lead to the following form of the characteristic x-ray intens ity of the element i of a particle P embeded in the matrix M in relation to the intensity of a standard S

Determination of the phase structure of polymerblends by electron microscopy

1978 ◽  
Vol 36 (1) ◽  
pp. 492-493
Author(s):  
Dr. G. Kaemof
Keyword(s):  
Screw Extruder ◽  
Electron Microscopic ◽  
Thin Sections ◽  
Single Screw Extruder ◽  
Transmission Electron ◽  
The Matrix ◽  
Twin Screw ◽  
Special Case ◽  
Microscopic Investigations

A mixture of polycarbonate (PC) and styrene-acrylonitrile-copolymer (SAN) represents a very good example for the efficiency of electron microscopic investigations concerning the determination of optimum production procedures for high grade product properties.The following parameters have been varied:components of charge (PC : SAN 50 : 50, 60 : 40, 70 : 30), kind of compounding machine (single screw extruder, twin screw extruder, discontinuous kneader), mass-temperature (lowest and highest possible temperature).The transmission electron microscopic investigations (TEM) were carried out on ultra thin sections, the PC-phase of which was selectively etched by triethylamine.The phase transition (matrix to disperse phase) does not occur - as might be expected - at a PC to SAN ratio of 50 : 50, but at a ratio of 65 : 35. Our results show that the matrix is preferably formed by the components with the lower melting viscosity (in this special case SAN), even at concentrations of less than 50 %.

Polishing process effect on the image of dispersed precipitates

1984 ◽  
Vol 42 ◽  
pp. 534-535
Author(s):  
C.T. Hu ◽  
C.W. Allen
Keyword(s):  
Matrix Material ◽  
Specimen Preparation ◽  
Second Phase ◽  
Precipitate Particle ◽  
Polishing Process ◽  
Second Phase Particles ◽  
The Matrix ◽  
Surface Profiles ◽  
Thinning Process

One important problem in determination of precipitate particle size is the effect of preferential thinning during TEM specimen preparation. Figure 1a schematically represents the original polydispersed Ni3Al precipitates in the Ni rich matrix. The three possible type surface profiles of TEM specimens, which result after electrolytic thinning process are illustrated in Figure 1b. c. & d. These various surface profiles could be produced by using different polishing electrolytes and conditions (i.e. temperature and electric current). The matrix-preferential-etching process causes the matrix material to be attacked much more rapidly than the second phase particles. Figure 1b indicated the result. The nonpreferential and precipitate-preferential-etching results are shown in Figures 1c and 1d respectively.

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