Chemical Bond Effects on Line Intensities in Arsenic X-Ray Emission Spectrum

2003 ◽  
Vol 44 (3) ◽  
pp. 410-419 ◽  
Author(s):  
T. A. Kupriyanova ◽  
M. N. Filippov ◽  
O. I. Lyamina
1957 ◽  
Vol 1 ◽  
pp. 193-206 ◽  
Author(s):  
William J. Campbell ◽  
Melvin Leon ◽  
John Thatcher

AbstractAn investigation was undertaken by the Bureau of Mines at College Park, Md., to determine the effect of various combinations of collimators, analyzing crystals and detectors on line intensities, line-to-backgrouhd ratios, and spectral resolution. The research showed that line broadening due to mosaic crystal surfaces was greatly reduced and line splitting from faults was eliminatedby the use of two fine collimators (0.005 inch, spacing, 4 inch length). Line intensities were reduced, but lineto- background ratios arid line profiles were substantially improved with double collimators. Pulse height discrimination resulted in marked improvement in the line-to-background ratio in the long-wave length region, 2 to 10 A, but was much less effective for shorter wave lengths.


1995 ◽  
Vol 43 (1-2) ◽  
pp. 67-73 ◽  
Author(s):  
S.A. Edwards ◽  
W.-ÜL. Tchang-Brillet ◽  
J.-Y. Roncin ◽  
F. Launay ◽  
F. Rostas

The effect of the chemical combination of an element upon its emission and absorption spectra has been the subject of many investigations by different authors. The results lead to the conclusion that the X-ray spectrum of an element is not a purely atomic phenomenon; it varies according to the state of chemical combination of the element. The effect appears to be more marked, and therefore more easily investigated, in the absorption than in the emission spectrum. Both spectra have, however, been examined and the effect in the K series measured for a number of the lighter elements from phosphorus to potassium; more recently the work has been extended to heavier elements such as iron. The present investigation deals with the K series spectra of copper, and was undertaken mainly with a view to obtaining, if possible, further information as to the nature of the chemical bond existing between elements in intermetallic compounds.


1972 ◽  
Vol 11 (03) ◽  
pp. 152-162 ◽  
Author(s):  
P. GAYNON ◽  
R. L. WONG

With the objective of providing easier access to pathology specimens, slides and kodachromes with linkage to x-ray and the remainder of the patient’s medical records, an automated natural language parsing routine, based on dictionary look-up, was written for Surgical Pathology document-pairs, each consisting of a Request for Examination (authored by clinicians) and its corresponding report (authored by pathologists). These documents were input to the system in free-text English without manual editing or coding.Two types of indices were prepared. The first was an »inverted« file, available for on-line retrieval, for display of the content of the document-pairs, frequency counts of cases or listing of cases in table format. Retrievable items are patient’s and specimen’s identification data, date of operation, name of clinician and pathologist, etc. The English content of the operative procedure, clinical findings and pathologic diagnoses can be retrieved through logical combination of key words. The second type of index was a catalog. Three catalog files — »operation«, »clinical«, and »pathology« — were prepared by alphabetization of lines formed by the rotation of phrases, headed by keywords. These keywords were automatically selected and standardized by the parsing routine and the phrases were extracted from each sentence of each input document. Over 2,500 document-pairs have been entered and are currently being utilized for purpose of medical education.


2021 ◽  
Vol 12 (16) ◽  
pp. 3996-4002
Author(s):  
Vinícius Wilian D. Cruzeiro ◽  
Andrew Wildman ◽  
Xiaosong Li ◽  
Francesco Paesani

1995 ◽  
Vol 51 (6) ◽  
pp. 942-951 ◽  
Author(s):  
Yu. A. Abramov ◽  
V. G. Tsirelson ◽  
V. E. Zavodnik ◽  
S. A. Ivanov ◽  
Brown I. D.

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