High-Energy, Large-Angle Distribution of Pair Electrons Produced by Bremsstrahlung

1954 ◽  
Vol 95 (3) ◽  
pp. 796-798 ◽  
Author(s):  
R. C. Miller
Keyword(s):  
Large Angle ◽  
High Energy ◽  
Angle Distribution

Evolution of the Texture on Primary Recrystallization and Grain Growth in Fe-3%Si Steels

2007 ◽  
Vol 558-559 ◽  
pp. 747-750 ◽  
Author(s):  
Kyu Seok Han ◽  
Jong Tae Park ◽  
Jae Kwan Kim ◽  
Jerzy A. Szpunar
Keyword(s):  
Misorientation Angle ◽  
Annealing Temperature ◽  
Secondary Recrystallization ◽  
Orientation Distribution ◽  
High Energy ◽  
Primary Recrystallization ◽  
Silicon Steel ◽  
Angle Distribution ◽  
X Ray ◽  
Misorientation Angle Distribution

Recrystallization texture in grain oriented silicon steel at different annealing temperature is investigated. Normalized x-ray intensities of various orientation components observed in Orientation Distribution Function are used for comparison. The computed CSL boundary distributions about Goss component with annealing condition were calculated. The misorientation angle distribution is also measured in order to find the importance of high-energy boundary with misorientation 20~45° range for the secondary recrystallization of Goss grain. From the analysis of CSL boundary distribution and misorienation angle distribution, the distribution of CSL boundaries does not evidently show any preferred difference between Goss and other texture components. Whereas, the misorientation angle analysis shows that the number of 20°~45° misoriented boundaries is higher around the Goss grains than around other texture components.

scholarly journals On Large Angle Elastic Proton-Proton Scattering at High Energy

1966 ◽  
Vol 35 (5) ◽  
pp. 834-839
Author(s):  
Masako Bando ◽  
Yoshio Takada
Keyword(s):  
Large Angle ◽  
High Energy ◽  
Proton Scattering ◽  
Proton Proton ◽  
Elastic Proton

scholarly journals Phenomena associated with the anomalous absorption of high energy gamma radiation.—II

1934 ◽  
Vol 143 (850) ◽  
pp. 681-706 ◽  
Keyword(s):  
Gamma Radiation ◽  
Scattered Radiation ◽  
Wave Length ◽  
Large Angle ◽  
High Energy ◽  
Secondary Radiation ◽  
Anomalous Absorption ◽  
Small Thickness ◽  
Energy Gamma ◽  
Γ Rays

In a previous paper we gave an account of an investigation of the secondary radiation produced when different elements are irradiated with the high energy γ-rays of thorium C". The present paper describes an extension of this investigation. It will be reduced that confusion with the ordinary scattered radiation was almost entirely eliminated by examining the secondary radiation in a direction making a large angle with the primary beam, since under these conditions not only is the Compton radiation relatively very much weaker, but in addition it is comparatively soft and is easily absorbed in the radiator itself, or in a very small thickness of absorber, owing to the large increase in wave-length at this large angle of scattering.

scholarly journals Observation of the Pitch Angle Distribution of High-Energy Ions and their Radial Transport in the Central Cell of GAMMA10

2011 ◽  
Vol 6 ◽  
pp. 2402152-2402152 ◽  
Author(s):  
Yasutaka IMAI ◽  
Makoto ICHIMURA ◽  
Ryuya IKEZOE ◽  
Tatsuya MURAKAMI ◽  
Toru IWAI ◽  
...  
Keyword(s):  
Pitch Angle ◽  
High Energy ◽  
Central Cell ◽  
Angle Distribution ◽  
Pitch Angle Distribution ◽  
Radial Transport ◽  
High Energy Ions

scholarly journals Incoherent ultrarelativistic particle scattering by nuclei at planar channeling

2020 ◽  
pp. 83-94
Author(s):  
Viktor V. Tikhomirov
Keyword(s):  
Transverse Energy ◽  
High Energy Physics ◽  
Particle Density ◽  
Large Angle ◽  
Plane Channel ◽  
Coherent Scattering ◽  
Simulation Method ◽  
Particle Beam ◽  
High Energy ◽  
Density Variation

The problem of high-energy charged particle motion in the field of atomic planes of oriented crystals, essential for particle beam manipulation, intensive gamma-radiation generation and prepared measurements of short-living elementary particle properties, such as magnetic and electric dipole momenta, is considered. A rigorously evaluated instant change of transverse channeling motion energy under the scattering by an atomic core is applied to deduce an expression for the average transverse energy growth rate, which takes into consideration both the quantum effects and sharp particle density variation inside an inter-plane channel. The latter makes it possible for the first time to describe numerically the key limitations of multiple applications of the channeling effects in high-energy physics, not involving the parameters, introduces earlier through the arbitrary qualitative considerations. Also, the expressions of both the large angle scattering cross section and average square of small scattering angles are obtained, making possible to formulate a consistent simulation method of both positively and negatively charged particles propagation both in and out of the channeling conditions, taking into consideration both quantum nature of incoherent and classical one of the coherent scattering of ultra-relativistic particles by crystal plane atoms.

scholarly journals Monte Carlo calculations of the atmospheric sputtering yields on Titan

2019 ◽  
Vol 623 ◽  
pp. A18 ◽  
Author(s):  
H. Gu ◽  
J. Cui ◽  
D.-D. Niu ◽  
A. Wellbrock ◽  
W.-L. Tseng ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Incidence Angle ◽  
Monte Carlo Model ◽  
High Energy ◽  
Special Focus ◽  
Angle Distribution ◽  
Model Calculations ◽  
Atmospheric Escape ◽  
High Energy Tail ◽  
Sputtering Yields

Context. Sputtering serves as an important mechanism of atmospheric escape in the solar system. Aims. This study is devoted to atmospheric sputtering on Titan, with a special focus on how the N2 and CH4 sputtering yields respond to varying ion incidence energy and angle, and varying ion mass. Methods. A Monte Carlo model was constructed to track the energy degradation of incident ions and atmospheric recoils from which the sputtering yields were obtained. A large number of model runs were performed, taking into account three categories of incident ion with representative masses of 1, 16, and 28 Da, as well as two collision models both characterized by a strongly forward scattering angle distribution, but different in terms of the inclusion or exclusion of electronic excitation of ambient neutrals. Results. Our model calculations reveal substantial increases in both the N2 and CH4 sputtering yields with increasing ion incidence energy and angle, and increasing ion mass. The energy distribution of escaping molecules is described reasonably well by a power law, with an enhanced high energy tail for more energetic incident ions and less massive atmospheric recoils. The CH4-to-N2 sputtering yield ratio is found to range from 10 to 20%, increasing with increasing incidence angle and also increasing with decreasing incidence energy. An approximate treatment of ion impact chemistry is also included in our model, predicting N2 sputtering yields on Titan that are in broad agreement with previous results.

SEARCHING FOR SUPERSYMMETRY AT e+e− SUPERCOLLIDERS

1989 ◽  
Vol 04 (16) ◽  
pp. 4111-4163 ◽  
Author(s):  
HOWARD BAER ◽  
A. BARTL ◽  
DEBRA KARATAS ◽  
W. MAJEROTTO ◽  
XERXES TATA
Keyword(s):  
Large Angle ◽  
High Energy ◽  
Supersymmetric Particle ◽  
Model Parameters ◽  
Ultrahigh Energy ◽  
Mixing Angles ◽  
Missing Transverse Momentum ◽  
Very High Energy ◽  
The Masses ◽  
Very High

We study the signals resulting from the production and subsequent decays of heavy sleptons, sneutrinos and all the charginos [Formula: see text] and neutralinos [Formula: see text] at ultrahigh energy e+e− colliders. In contrast to existing studies that assume that supersymmetric particles directly decay to the lightest supersymmetric particle (taken here to be the lightest neutralino, [Formula: see text]) which then escapes detection, we incorporate realistic decay patterns using the minimal supersymmetry model as a guide for the masses and mixing angles in the gaugino-Higgsino sector. We show that very heavy sleptons and sneutrinos often decay into heavier charginos and neutralinos which themselves often decay into real W and Z0 bosons and lighter [Formula: see text]'s and [Formula: see text]'s. This results in a considerably softer missing transverse momentum [Formula: see text] spectrum than would be expected if sparticles decayed directly to the [Formula: see text] so that [Formula: see text] is not necessarily a viable signature for very heavy sparticles. We show that the optimal signature for supersymmetry in very high energy e+e− collisions depends on the model parameters. Whereas [Formula: see text] is a viable signature for lighter sleptons and sneutrinos (m ~ 0.3 TeV ), the production of very heavy sparticles is signalled by events with two or more large angle W and Z0 bosons and often a very hard electron. We discuss strategies for extracting the SUSY signal and argue that it can be separated from standard model backgrounds over the whole of parameter space.

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