CONTINUOUS X-RAY PRODUCTION CROSS-SECTION IN THIN POLYMER FILMS

2011 ◽  
Vol 21 (03n04) ◽  
pp. 67-73
Author(s):  
P. BALOURIA ◽  
I. M. GOVIL ◽  
B. P. MOHANTY ◽  
M. L. GARG ◽  
K. ISHII
Keyword(s):  
Cross Sections ◽  
Polymer Films ◽  
Production Cross ◽  
Polymer Materials ◽  
X Rays ◽  
Thin Polymer Films ◽  
X Ray ◽  
Standard Data ◽  
Electron Bremsstrahlung ◽  
Thin Polymer

We have calculated the production cross-sections of continuous X-rays for commonly used thin polymer films on the basis of the theories of quasi-free electron bremsstrahlung (QFEB), secondary electron bremsstrahlung (SEB), atomic bremsstrahlung (AB) and nuclear bremsstrahlung (NB). These results are compared with that of experimental one. We found that SEB is the main contributing factor and the contribution of QFEB, AB and NB is negligible. This work would facilitate choice among available polymer materials and lay down well-defined standard data against which new candidates might be judged.

scholarly journals Transmittances of thin polymer films and their suitability as a supportive substrate for a soft x-ray solar filter

1991 ◽  
Author(s):  
Memorie K. Williams ◽  
Evan Hansen ◽  
Arturo Reyes-Mena ◽  
David D. Allred
Keyword(s):  
Polymer Films ◽  
Thin Polymer Films ◽  
X Ray ◽  
Thin Polymer

Measurement of L X-ray production cross sections and relative intensities of some lanthanide compounds depending on the temperature

2020 ◽  
Vol 108 (5) ◽  
pp. 415-423
Author(s):  
Esra Cinan ◽  
Bünyamin Aygün ◽  
M. I. Sayyed ◽  
Yüksel Özdemir
Keyword(s):  
Cross Sections ◽  
Full Width Half Maximum ◽  
Production Cross ◽  
Emission Spectra ◽  
X Rays ◽  
X Ray ◽  
Different Temperatures ◽  
Intensity Ratios ◽  
Annular Source

AbstractL X-ray intensity ratios for CeO2, Sm2(SO4)3, Ho2O3, and Yb2O3 compounds were experimentally investigated. The measurements were gauged following excitation by 59.54 keV γ-rays from a 100 mCi 241Am radioactive annular source at different temperatures in situ. Temperature change occurred between 50 °C and 400 °C. L X-ray emission spectra were obtained by using a solid-state Si(Li) X-ray detector. L X-ray production cross sections, intensity ratios, and full-width half maximum (FWHM) values for the compounds were determined by evaluating the emission spectra varying with the temperature. According to the results obtained, it was observed that Lβ1 X-rays were less influenced in comparison with Lα X-rays while Lα X-rays were also less influenced in comparison with Lβ2 X-rays.

Photon-Induced L-Shell X-Ray Production Cross Sections for Lanthanides at 59.54 keV

2017 ◽  
Vol 890 ◽  
pp. 223-226 ◽  
Author(s):  
Rıdvan Durak ◽  
Ferdi Akman ◽  
Abdulhalik Karabulut
Keyword(s):  
High Resolution ◽  
Cross Sections ◽  
Production Cross ◽  
Theoretical Data ◽  
Experimental Results ◽  
X Rays ◽  
X Ray ◽  
Reflection Geometry ◽  
Experimental Values ◽  
Annular Source

The Ll, Lα and Lβ X-ray production cross sections for Pr, Nd, Sm, Eu, Gd and Tb elements were determined using a reflection geometry. The excitation was performed with a 241Am radioactive annular source and the L X-rays emitted from targets were counted with a high-resolution Si (Li) detector. The experimental values were compared with other available experimental results and theoretical data. An agreement is observed between the measured and other experimental results or theoretical data.

scholarly journals Mapping the Structural Order of Laser-Induced Periodic Surface Structures in Thin Polymer Films by Microfocus Beam Grazing Incidence Small-Angle X-ray Scattering

2015 ◽  
Vol 7 (5) ◽  
pp. 3162-3169 ◽  
Author(s):  
Ignacio Martín-Fabiani ◽  
Esther Rebollar ◽  
Mari Cruz García-Gutiérrez ◽  
Daniel R. Rueda ◽  
Marta Castillejo ◽  
...  
Keyword(s):  
Polymer Films ◽  
Small Angle ◽  
Grazing Incidence ◽  
Surface Structures ◽  
Thin Polymer Films ◽  
Periodic Surface ◽  
X Ray ◽  
Structural Order ◽  
X Ray Scattering ◽  
Thin Polymer

OBSERVATION OF INTERFERENCE BETWEEN ATOMIC BREMSSTRAHLUNG AND NUCLEAR BREMSSTRAHLUNG

1999 ◽  
Vol 09 (01n02) ◽  
pp. 1-10 ◽  
Author(s):  
K. ISHII ◽  
T. SATOH ◽  
S. MATSUYAMA ◽  
H. YAMAZAKI ◽  
Y. TOKAI ◽  
...  
Keyword(s):  
Cross Sections ◽  
Energy Region ◽  
Production Cross ◽  
Angular Distributions ◽  
X Rays ◽  
Beam Direction ◽  
Aluminum Target ◽  
X Ray ◽  
Wide Range ◽  
Mev Protons

An aluminum target was bombarded with 1.5 MeV protons and continuous x-rays were measured at the angles of 45°, 90° and 135° with respect to the beam direction. By investigating the shape of the x-ray energy spectrum, it was recognized that, the continuous x-rays below 12 keV are atomic bremsstrahlung (AB) and those of above 12 keV are nuclear bremsstrahlung (NB), and AB and NB are mingled in the energy region of around 12 keV The x-ray energy dependence of angular distributions presented well a change from the process of AB to that of NB in the continuous x-ray spectrum. Interference between AB and NB were discussed on the basis of PWBA theory. Continuous x-ray production cross sections were calculated on the basis of PWBA BEA and a semi-classical theory and compared with the experimental results. The theoretical prediction reproduced well the experimental cross sections over the wide range of 6 orders in magnitude and of 2 keV – 35 keV in the energy except for the energy region mingled with AB and NB. The ratio of the theoretical cross sections to the experimental ones showed an interference effect between AB and NB in their mingled region.

M-SHELL X-RAY TRANSITION RATES FOR HEAVY RARE EARTH ELEMENTS

1998 ◽  
Vol 08 (04) ◽  
pp. 235-251
Author(s):  
K. SERA ◽  
K. ISHII ◽  
H. ORIHARA
Keyword(s):  
Cross Sections ◽  
Production Cross ◽  
X Rays ◽  
Transition Rates ◽  
Heavy Rare Earth ◽  
Crystal Spectrometer ◽  
Pixe Analysis ◽  
X Ray ◽  
Heavy Lanthanides ◽  
Heavy Rare Earth Elements

Partial M-x-ray production cross sections, which have not been well investigated up to the present, were measured in detail for six heavy lanthanides; Dy , Ho , Er , Tm , Yb and Lu . As a result, it is found that intensities of Mα,β lines, which are dominant among all the M-x-rays, and (M1-N2, M1-N3, M2-N4) lines agree well with those predicted by theory. However, clear discrepancy is found for Mζ and Mγ x-rays. Although it was pointed out by a PIXE analysis with a high-resolution crystal spectrometer that special attention must be paid for an analysis of Mζ and Mγ lines, it is found from the present work that it is possible to perform quantitative analysis using Mα,β lines.

Sign in / Sign up

Export Citation Format

Share Document