Comparisons of sets of electron–neutral scattering cross sections and swarm parameters in noble gases: I. Argon

2013 ◽  
Vol 46 (33) ◽  
pp. 334001 ◽  
Author(s):  
L C Pitchford ◽  
L L Alves ◽  
K Bartschat ◽  
S F Biagi ◽  
M C Bordage ◽  
...  
Keyword(s):  
Cross Sections ◽  
Noble Gases ◽  
Scattering Cross ◽  
Scattering Cross Sections

scholarly journals A search for deviations from the inverse square law of gravity at nm range using a pulsed neutron beam

2019 ◽  
Vol 219 ◽  
pp. 05002
Author(s):  
Christopher Haddock ◽  
Katsuya Hirota ◽  
Takashi Ino ◽  
Masaaki Kitaguchi ◽  
Kenji Mishima ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Cross Sections ◽  
Noble Gases ◽  
Scattering Length ◽  
Slow Neutron ◽  
Inverse Square Law ◽  
Scattering Cross ◽  
Law Of Gravity ◽  
Neutron Momentum ◽  
Scattering Cross Sections

Recently published results and ongoing experimental efforts to search for deviations from the inverse square law of gravity at the nanometer length scale using slow neutron scattering from the noble gases are discussed. Using the pulsed slow neutron beamline BL05 at the Materials and Life Sciences Facility at J-PARC, we measured the neutron momentum transfer (q) dependence of the differential scattering cross section for the noble gases He, Ne, Ar, Kr, and Xe. By comparing to the distributions obtained using pseudo-experimental Monte Carlo simulations and forming ratios between Xe and He, we placed an upper bound on the strength of a new interaction as a function of interaction length λ which improved upon previous results in the region λ < 0.1 nm, and remains competitive in the larger λ region. Additionally we describe how we are using our technique to extract relative values of the total neutron scattering cross sections of the noble gases, as well as how we plan to measure the neutron-electron scattering length using the NOVA instrument on BL21 at J-PARC.

Comparisons of sets of electron–neutral scattering cross sections and swarm parameters in noble gases: II. Helium and neon

2013 ◽  
Vol 46 (33) ◽  
pp. 334002 ◽  
Author(s):  
L L Alves ◽  
K Bartschat ◽  
S F Biagi ◽  
M C Bordage ◽  
L C Pitchford ◽  
...  
Keyword(s):  
Cross Sections ◽  
Noble Gases ◽  
Scattering Cross ◽  
Scattering Cross Sections

Comparisons of sets of electron–neutral scattering cross sections and swarm parameters in noble gases: III. Krypton and xenon

2013 ◽  
Vol 46 (33) ◽  
pp. 334003 ◽  
Author(s):  
M C Bordage ◽  
S F Biagi ◽  
L L Alves ◽  
K Bartschat ◽  
S Chowdhury ◽  
...  
Keyword(s):  
Cross Sections ◽  
Noble Gases ◽  
Scattering Cross ◽  
Scattering Cross Sections

Excitations of rotational energy levels of ozone molecule O3 by collisions with atoms of the noble gases (Ar and He)

2021 ◽  
pp. 162-170
Author(s):  
O.V. Egorov ◽  
◽  
A.K. Tretyakov ◽  
◽  
Keyword(s):  
Cross Sections ◽  
Collision Energy ◽  
Noble Gases ◽  
Energy Levels ◽  
Rotational Energy ◽  
Rate Coefficients ◽  
Rotational States ◽  
Scattering Cross ◽  
Coupled Channel ◽  
Scattering Cross Sections

The scattering cross-sections on rotational energy levels of O3 by collisions with atoms of the noble gases (Ar and He) were calculated using the two-body scheme implemented in the MOLSCAT2020 package. All energy levels of O3 up to J max = K max = 5 and J max = K max = 7 were included that corresponds to 18 and 32 coupled channel equations. The dependences of the scattering cross-sections on the collision energy were analyzed and the most probable excited rotational states of O3 were determined. The rate coefficients at the temperatures of 5-300 K were calculated. The construction of the radial part of the angular coefficients of the interaction potential is also discussed.

Absolute inner-shell cross section determination for EELS analysis

1988 ◽  
Vol 46 ◽  
pp. 534-535
Author(s):  
P.A. Crozier
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Absolute Cross Section ◽  
Specimen Thickness ◽  
Mass Thickness ◽  
Scattering Cross ◽  
Before And After ◽  
Estimated Error ◽  
Scattering Cross Sections ◽  
Electron Microscopist

Absolute inelastic scattering cross sections or mean free paths are often used in EELS analysis for determining elemental concentrations and specimen thickness. In most instances, theoretical values must be used because there have been few attempts to determine experimental scattering cross sections from solids under the conditions of interest to electron microscopist. In addition to providing data for spectral quantitation, absolute cross section measurements yields useful information on many of the approximations which are frequently involved in EELS analysis procedures. In this paper, experimental cross sections are presented for some inner-shell edges of Al, Cu, Ag and Au.Uniform thin films of the previously mentioned materials were prepared by vacuum evaporation onto microscope cover slips. The cover slips were weighed before and after evaporation to determine the mass thickness of the films. The estimated error in this method of determining mass thickness was ±7 x 107g/cm2. The films were floated off in water and mounted on Cu grids.

scholarly journals Towards fully nonperturbative computations of inelastic ℓN scattering cross sections from lattice QCD

2020 ◽  
Vol 102 (11) ◽  
Author(s):  
Hidenori Fukaya ◽  
Shoji Hashimoto ◽  
Takashi Kaneko ◽  
Hiroshi Ohki
Keyword(s):  
Lattice Qcd ◽  
Cross Sections ◽  
Scattering Cross ◽  
Scattering Cross Sections
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