Measurement of flux-weighted average cross sections for 197 Au( γ , xn) reactions and isomeric yield ratios of 196m,g Au with bremsstrahlung

2016 ◽  
Vol 948 ◽  
pp. 28-45 ◽  
Author(s):  
Haladhara Naik ◽  
Guinyun Kim ◽  
Kwangsoo Kim ◽  
Muhammad Zaman ◽  
Ashok Goswami ◽  
...  
Keyword(s):  
Cross Sections ◽  
Weighted Average ◽  
Isomeric Yield

Measurement of photo-neutron cross sections and isomeric yield ratios in the 89Y(γ,xn)89−x Y reactions at the bremsstrahlung end-point energies of 65, 70 and 75 MeV

2017 ◽  
Vol 105 (10) ◽  
Author(s):  
Mansoureh Tatari ◽  
Haladhara Naik ◽  
Guinyun Kim ◽  
Kwangsoo Kim ◽  
Sung-Gyun Shin ◽  
...  
Keyword(s):  
Cross Sections ◽  
Weighted Average ◽  
End Point ◽  
Isomeric Yield ◽  
Neutron Cross Sections

AbstractThe flux-weighted average cross sections of the

X-Ray Fluorescence Cross-Section Measurements in the Energy Range 4-18 keV

1995 ◽  
Vol 39 ◽  
pp. 845-855
Author(s):  
Krassimir N. Stoev ◽  
Joseph F. Dlouhy
Keyword(s):  
Cross Sections ◽  
Transition Probabilities ◽  
Weighted Average ◽  
Physical Parameters ◽  
Emission Rates ◽  
Excitation Energies ◽  
X Ray ◽  
Fluorescence Cross Section ◽  
Theoretical Results

K, L and M shell x-ray fluorescence cross sections have been measured for elements 11 ≤, Z ≤, 92 at excitation energies corresponding to weighted average energies of K-lines of Ti-K (4.558 keV), Fe-K (6,480 keV), Ge-K (10.024 keV), Se-K (11.391 keV) and Mo-K (17.805 keV) . The measurements were performed with an energy-dispersive x-ray spectrometer in a vacuum chamber using thin ultra-pure targets. Rh x-ray tube and secondary targets were used for excitation of x-ray radiation. The measured x-ray fluorescence cross-sections have been compared to previously published experimental and theoretical results. Presented data can be used for determination of physical parameters such as photoionization cross-sections, fluorescence yields, x-ray emission rates, Coster-Kronig transition probabilities and jump ratios.

Flux weighted average cross-sections of natNi(γ, x) reactions with the bremsstrahlung end-point energies of 55, 59, 61 and 65 MeV

2018 ◽  
Vol 978 ◽  
pp. 173-186 ◽  
Author(s):  
Muhammad Zaman ◽  
Guinyun Kim ◽  
Haladhara Naik ◽  
Kwangsoo Kim ◽  
Muhammad Shahid ◽  
...  
Keyword(s):  
Cross Sections ◽  
Weighted Average ◽  
End Point

Flux-weighted average cross-sections of natAg(γ, xn)103–106Ag reactions with end-point bremsstrahlung energies of 45–60 MeV

2015 ◽  
Vol 51 (1) ◽  
Author(s):  
Muhammad Zaman ◽  
Guinyun Kim ◽  
Haladhara Naik ◽  
Kwangsoo Kim ◽  
Sung-Chul Yang ◽  
...  
Keyword(s):  
Cross Sections ◽  
Weighted Average ◽  
End Point

Investigation of Flux-Weighted Average Cross Sections for Reactions on $${}^{{93}}$$Nb with Bremsstrahlung of LUE-75

2021 ◽  
Vol 84 (3) ◽  
pp. 245-249
Author(s):  
A. E. Avetisyan ◽  
R. V. Avetisyan ◽  
A. G. Barseghyan ◽  
Yu. A. Gharibyan ◽  
A. V. Gyurjinyan ◽  
...  
Keyword(s):  
Cross Sections ◽  
Weighted Average

Ion-Slip Coefficients for Partially Ionized Argon and Helium

1970 ◽  
Vol 25 (12) ◽  
pp. 1823-1827
Author(s):  
H.S.C. Wang
Keyword(s):  
Momentum Transfer ◽  
Cross Sections ◽  
Weighted Average ◽  
Transport Processes ◽  
Ohm’S Law ◽  
Family Of Curves ◽  
Ion Slip ◽  
Ohm's Law ◽  
Partially Ionized ◽  
Slip Coefficients

Abstract Ion-slip coefficients in Demetriades and Argyropoulos' generalized Ohm's law are studied quan-titatively in the first approximation for partially ionized Ar and He under various non-isothermal gas conditions. The macroscopic forces due to collisions between electrons, ion, and neutral atoms are accounted by averaging the momentum transfer cross sections over the Maxwellian velocity distributions of the colliding particles. To incorporate the appropriate interpolation and extrapola-tion techniques in the low energy limit, Frost and Phelps' cross sections for electron-atom collisions and Dalgarno's value for ion-atom resonant charge-transfer cross sections were used. The weighted average momentum transfer cross sections thus obtained, which are also important in other diffusion and transport processes, are tabulated at various particle kinetic temperatures for both gases. A family of curves representing values of ion-slip coefficients calculated from these data is plotted. With the generalized Ohm's law written in its inverted form, the influence of ion-slip on the "Hall conductivity" in Kruger et al's formulation is discussed.

scholarly journals Comparative Study on the Evaluation of Wind Load on Buildings Using Computational Fluid Dynamics and IS: 875(Part-3)

2018 ◽  
Vol 7 (1) ◽  
pp. 16-18
Author(s):  
J. Ashok ◽  
Shirlin Charles ◽  
C. Umarani
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Cross Sections ◽  
Incidence Angle ◽  
Weighted Average ◽  
Tall Buildings ◽  
Wind Load ◽  
Wind Pressure ◽  
Lateral Loads ◽  
Ansys Fluent

Tall Buildings are highly susceptible to wind induced lateral loads and is required to be designed with greater accuracy. The codal provision IS 875 (part 3) which is usually used, has a limitation that the coefficient of pressure Cpvalues available are, only for 0 and 90 degrees wind incidence angles and for standard cross sections of buildings only. Therefore wind tunnel experiments are carried out to measure wind loads which provide reliable results than the code. This Paper deals with, computational fluid dynamics, an alternative and highly dependable tool to predict the wind related phenomena on buildings. A numerical evaluation of wind pressure is done for the different cases of buildings in IS 875 part-3. Wind load obtained by using IS 875 part-3 are compared with the result obtained from CFD in ANSYS Fluent 15.0 and results are found to be in good agreement .The mean area weighted average values of Coefficient of pressure are also computed for various wind incidence angle.

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