A new method for preparing thin samples of pottery shards for pixe analysis

1982 ◽  
Vol 202 (3) ◽  
pp. 487-491 ◽  
Author(s):  
A.J. Houdayer ◽  
P. Beaudoin ◽  
L. Lessard
Keyword(s):  
New Method ◽  
Pixe Analysis ◽  
Thin Samples

DETERMINATION OF PHYSICAL QUANTITIES FOR PIXE BY MEANS OF PIXE 1: ABSORPTION CURVE

1994 ◽  
Vol 04 (02n03) ◽  
pp. 165-179 ◽  
Author(s):  
K. SERA ◽  
S. FUTATSUGAWA ◽  
S. HATAKEYAMA ◽  
S. SAITOU
Keyword(s):  
Background Subtraction ◽  
New Method ◽  
Absorption Curve ◽  
X Rays ◽  
Pixe Analysis ◽  
Peak Areas ◽  
Physical Quantities ◽  
Different Thickness ◽  
Good Agreement

A new method has been developed to determine absorption curves which are needed to derive quantitative values in PIXE analysis. In this method two spectra obtained with absorbers of different thickness are divided by each other after background subtraction and the absorption curve can be obtained immediately. Absorption curves for a 50 and a 200 µm-thick Mylar films and that for a Cr foil of 2500 µg/cm2 were determined experimentally. These curves are in good agreement with the absorption values derived from peak areas of characteristic x-rays. This method enables one to obtain absorption curves for any kind of absorber accurately and quickly.

scholarly journals NEW METHOD OF THREE-POINT VIBRATION MEASUREMENTS OF TENSILE MODULUS OF THIN SAMPLES – AND ITS APPLICATION TO THE VARIETY OF SPECIMENS

2018 ◽  
Vol 3 (1) ◽  
pp. 7-12
Author(s):  
Karol Kvetan ◽  
Janette Kotianová ◽  
Ondrej Bošák ◽  
Marián Kubliha ◽  
Martin Kotian
Keyword(s):  
Tensile Modulus ◽  
New Method ◽  
Vibration Measurements ◽  
Thin Samples

New method for determining hydrogen and helium isotope content in thin samples

1973 ◽  
Vol 34 (4) ◽  
pp. 334-338 ◽  
Author(s):  
K. P. Artemov ◽  
V. Z. Gol'dberg ◽  
I. P. Petrov ◽  
V. P. Rudakov ◽  
I. N. Serikov ◽  
...  
Keyword(s):  
New Method ◽  
Helium Isotope ◽  
Isotope Content ◽  
Thin Samples

Accurate PIXE Analysis of Thin Samples, Aerosol Loaded Filters and Surface Layers of Thick Samples

1981 ◽  
Vol 25 ◽  
pp. 195-199 ◽  
Author(s):  
U. Wätjen ◽  
F.-W. Richter
Keyword(s):  
Cross Sections ◽  
Trace Element Content ◽  
Surface Layers ◽  
Thin Sample ◽  
Pixe Analysis ◽  
X Ray ◽  
Wide Range ◽  
Ionization Cross Sections ◽  
Non Destructive ◽  
Thin Samples

Particle induced X-ray emission (PIXE) analysis is well established as a multi-element, non-destructive technique to measure the trace element content of thin samples (≤ 1 mg/cm2). The wide range of its analytical applications was shown in numerous reports at the 2nd International PIXE Conference in Lund. For thin sample analysis routinely done at the Marburg PIXE facility, we calibrated our spectrometer empirically at proton energies of 2 and 4 MeV using two separate sets of calibration standards, one purchased from MicroMatter Co., the other prepared by precipitate exchange. Both sets of standards were checked by AAS and CMP. K-shell ionization cross sections, calculated from our measured x-ray yields, agree very well with recent literature values, and will be reported elsewhere.

XRF and PIXE Analysis of light and Dark Adapted Ocular Tissue

1982 ◽  
Vol 40 ◽  
pp. 190-191
Author(s):  
B. J. Panessa ◽  
H. W. Kraner ◽  
J. B. Warren ◽  
K. W. Jones
Keyword(s):  
Trace Metals ◽  
Pigment Epithelium ◽  
Nerve Impulse ◽  
Light Response ◽  
Ocular Tissue ◽  
Emission Spectrometry ◽  
Retinol Dehydrogenase ◽  
Pixe Analysis ◽  
X Ray ◽  
Optimal Function

During photoexcitation the retina requires specific electrolytes and trace metals for optimal function (Na, Mg, Cl, K, Ca, S, P, Cu and Zn). According to Hagins (1981), photoexcitation and generation of a nerve impulse involves the movement of Ca from the rhodopsin-ladened membranes of the rod outer segment (ROS) to the plasmalemma, which in turn decreases the in-flow of Na into the photoreceptor, resulting in hyperpolarization. In toad isolated retinas, the presence of Ba has been found to increase the amplitude and prolong the delay of the light response (Brown and Flaming, 1978). Trace metals such as Cu, Zn and Se are essential for the activity of the metalloenzymes of the retina and retina pigment epithelium (RPE) (i.e. carbonic anhydrase, retinol dehydrogenase, tyrosinase, glutathione peroxidase, superoxide dismutase...). Therefore the content and fluctuations of these elements in the retina and choroid are of fundamental importance for the maintenance of vision. This paper presents elemental data from light and dark adapted frog ocular tissues examined by electron beam induced x-ray microanalysis, x-ray fluorescence spectrometry (XRF) and proton induced x-ray emission spectrometry (PIXE).

Selective Sampling and Orientation of Non-Homogeneous Tissues

1968 ◽  
Vol 26 ◽  
pp. 98-99
Author(s):  
C. C. Clawson ◽  
L. W. Anderson ◽  
R. A. Good
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Light Microscopy ◽  
Random Sampling ◽  
New Method ◽  
Microscope Examination ◽  
Small Areas ◽  
Selective Sampling ◽  
Large Numbers ◽  
Specific Orientation

Investigations which require electron microscope examination of a few specific areas of non-homogeneous tissues make random sampling of small blocks an inefficient and unrewarding procedure. Therefore, several investigators have devised methods which allow obtaining sample blocks for electron microscopy from region of tissue previously identified by light microscopy of present here techniques which make possible: 1) sampling tissue for electron microscopy from selected areas previously identified by light microscopy of relatively large pieces of tissue; 2) dehydration and embedding large numbers of individually identified blocks while keeping each one separate; 3) a new method of maintaining specific orientation of blocks during embedding; 4) special light microscopic staining or fluorescent procedures and electron microscopy on immediately adjacent small areas of tissue.

A new method for the determination of nitrates

1960 ◽  
Vol 23 ◽  
pp. 227-232 ◽  
Author(s):  
P WEST ◽  
G LYLES
Keyword(s):  
New Method
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