Analytical expression for the electronic stopping cross section of atomic gas targets for hydrogen projectiles

2021 ◽  
Vol 103 (3) ◽  
Author(s):  
R. Cabrera-Trujillo
Keyword(s):  
Cross Section ◽  
Analytical Expression ◽  
Atomic Gas ◽  
Gas Targets

scholarly journals An optimization of inner structures of the drying chamber of high temperature pneumatic drum drier

2010 ◽  
pp. 101-116
Author(s):  
Radivoje Topic ◽  
Nenad Cupric ◽  
Aleksandar Dedic ◽  
Aleksandar Petrovic
Keyword(s):  
High Temperature ◽  
Cross Section ◽  
Current Position ◽  
Working Process ◽  
Analytical Expression ◽  
Drying Chamber ◽  
Chamber Diameter

In this paper an analysis of the influence of parameters of flights from inner drying chamber structure and drying chamber is given. The influence of the following parameters on dryer working process is analyzed: number, shape and width of flights, level of coverage of cross-section drying chamber by material, rpm and drying chamber diameter. In the analytical expression for determining the amount of material seized by a curved flight, depending on the current position of the flight during drum rotation, a new parameter is introduced, compared to expression for a rectilinear flight. The expanded analytical expression could be used for optimization.

Single electron capture by N12+ in rare gas targets between 60 keV and 200 keV

1979 ◽  
Vol 57 (12) ◽  
pp. 2078-2083
Author(s):  
B. Hird ◽  
H. C. Suk ◽  
S. P. Ali
Keyword(s):  
Cross Section ◽  
Weighted Average ◽  
Rare Gas ◽  
Rare Gases ◽  
Single Electron Capture ◽  
Correct Energy ◽  
Type Calculation ◽  
Gas Targets ◽  
Singly Charged ◽  
Charged Ions

Charge exchange measurements in thin targets of the rare gases by a N2+ beam have been made between 60 keV and 200 keV. The singly charged ions produced in the collisions are expected to be produced in only a few allowed states, and a Rapp and Francis type calculation for the weighted average cross section to these allowed states was found to have generally the correct energy dependence but to be too small by a factor which increased from 4 in He to more than 10 in Xe. There was some evidence that the 4P state of N2+ may have been present in the beam in varying amounts.

Cross Section Measurements on Gas Targets Relevant to the Production of the Positron Emitting Radionuclides14O,18F and76Br

2002 ◽  
Vol 39 (sup2) ◽  
pp. 1278-1281 ◽  
Author(s):  
Bernhard Scholten ◽  
Elke Hess ◽  
Sándor Takács ◽  
Zoltán Kovács ◽  
Ferenc Tárkányi ◽  
...  
Keyword(s):  
Cross Section ◽  
Gas Targets

scholarly journals Multi-scalar signature of self-interacting dark matter in the NMSSM and beyond

2021 ◽  
Vol 2021 (9) ◽  
Author(s):  
Jinmian Li ◽  
Junle Pei ◽  
Cong Zhang
Keyword(s):  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Dark Matter ◽  
Cross Section ◽  
High Energy ◽  
The Self ◽  
Majorana Fermion ◽  
Scalar Boson ◽  
Analytical Expression

Abstract This work studies the self-interacting dark matter (SIDM) scenario in the general NMSSM and beyond, where the dark matter is a Majorana fermion and the force mediator is a scalar boson. An improved analytical expression for the dark matter (DM) self-interacting cross section which takes into account the Born level effects is proposed. Due to the large couplings and light mediator in SIDM scenario, the DM/mediator will go through multiple branchings if they are produced with high energy. Based on the Monte Carlo simulation of the showers in the DM sector, we obtain the multiplicities and the spectra of the DM/mediator from the Higgsino production and decay at the LHC for our benchmark points.

The D-D cross-section and angular distribution between 55 and 430 keV

1953 ◽  
Vol 216 (1124) ◽  
pp. 66-71 ◽  
Keyword(s):  
Angular Distribution ◽  
Total Cross Section ◽  
Energy Range ◽  
Cross Section ◽  
Experimental Error ◽  
Forward Direction ◽  
Angular Distributions ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Gas Targets

The cross-section and angular distributions of protons from the D-D reaction using thin gas targets have been measured from 55 to 430 keV. The results have been expressed in the form σ θ = ( σ /4 π (1+⅓ A +1/5 B )) (1+ A cos 2 θ + B cos 4 θ). The variation of the total cross-section σ and the asymmetry coefficients A and B over the energy range 15 to 190 keV can be described by the theory of Beiduk, Pruett & Konopinski introducing only a small or negligible amount of spin-orbit coupling. The ratio of the number of 3 He’s to 3 H’s has been measured up to 250 keV at a few angles in the forward direction only, and found to be unity within experimental error.

Low-energy electronic stopping cross sections in nitrogen and argon

1968 ◽  
Vol 46 (6) ◽  
pp. 497-502 ◽  
Author(s):  
J. H. Ormrod
Keyword(s):  
Energy Loss ◽  
Energy Dependence ◽  
Cross Section ◽  
Atomic Number ◽  
Cross Sections ◽  
Collision Frequency ◽  
Gas Pressure ◽  
Low Energy ◽  
Nuclear Stopping ◽  
Gas Targets

The rate of energy loss in nitrogen and argon targets for ions with [Formula: see text] and E < 200 keV has been measured. The contribution to the energy loss from nuclear stopping was calculated using Fastrup's method, and was subtracted from the observed stopping cross section to give the electronic stopping cross section. Over the energy interval studied, the electronic stopping cross sections obtained are below the theoretical values and the energy dependence in argon is much greater than [Formula: see text].A target gas pressure of ~10 μ was used. This reduces the collision frequency eight orders of magnitude below that in a solid. The periodic dependence of the electronic stopping cross section on the atomic number of the incident projectile, previously observed in solid targets, occurs also for such low-pressure gas targets; it is concluded that this dependence is not affected by the collision frequency.

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