THE PHOTOPROTONS EMITTED FROM OXYGEN-16 NUCLEI

The photographic plate method has been used to study photoprotons emitted from oxygen gas exposed to bremsstrahlung of maximum energies 30, 35, and 70 Mev. The proton energy distributions above 5 Mev. show maxima corresponding to peaks in the (γ, p) excitation function at 20.7, 21.9, and 24.0 Mev. The proton angular distributions are anisotropic, in general agreement with a sin2θ function, but the high-energy protons exhibit a degree of asymmetry about the 90° angle which may be due to a small electric-quadrupole interference effect.

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The scattering of 29 MeV 3 He-particles by 1 H, 2 H, 3 He and 4 He nuclei

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1960.0182 ◽

1960 ◽

Vol 258 (1293) ◽

pp. 202-214 ◽

Cited By ~ 6

Keyword(s):

Group Theory ◽

Elastic Scattering ◽

Cross Sections ◽

Photographic Plate ◽

Light Nuclei ◽

Angular Distributions ◽

Angular Range ◽

Centre Of Mass ◽

Plate Method ◽

Inelastic Processes

Angular distributions for the scattering of 29 MeV 3 He-particles by light nuclei have been observed using a photographic plate method. Absolute differential cross-sections for elastic scattering, and for inelastic processes for 2 H, 3 He and 4 He nuclei, are given within the centre-of-mass angular range 20 to 150°. The elastic scattering distributions for the 1 H and 3 He nuclei have been compared with predictions based on resonating group theory.

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Channeling of Protons through Radial Deformed Double Wall Carbon Nanotubes

Atoms ◽

10.3390/atoms7030088 ◽

2019 ◽

Vol 7 (3) ◽

pp. 88

Author(s):

Duško Borka ◽

Vesna Borka Jovanović

Keyword(s):

Carbon Nanotubes ◽

Proton Energy ◽

High Energy ◽

Ion Beams ◽

Angular Distributions ◽

Radial Deformation ◽

Mc Simulation ◽

Single Wall Nanotubes ◽

First Time ◽

Double Wall

In this study we presented a theoretical investigation of the channeling of high energy protons with the radial deformed (10, 0)@(5, 0) double-wall carbon nanotubes (DWNTs). Proton energy is varied from 0.1 to 10 GeV. The channeling potential within the deformed DWNTs is presented. A Monte Carlo (MC) simulation is used to obtain spatial and angular distributions of channeled protons with radially deformed DWNTs. We treated problem relativistically. This is the first time that we presented spatial and angular distributions of channeled protons with radially deformed DWNTs. Our results show that the spatial and angular distributions depend strongly of nanotube lengths, proton energy, and especially of level of radial deformation of nanotube. Multi-wall nanotubes (MWNTs) can be technically realised with better channeling performance then single-wall nanotubes (SWNTs) and that is why we believe that these results may be useful for production and guiding of nanosized ion beams.

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ENERGY AND ANGULAR DISTRIBUTIONS OF PHOTONEUTRONS PRODUCED BY 70-MEV. X-RAYS

Canadian Journal of Physics ◽

10.1139/p55-094 ◽

1955 ◽

Vol 33 (12) ◽

pp. 785-796 ◽

Cited By ~ 17

Author(s):

W. R. Dixon

Keyword(s):

High Energy ◽

Zinc Sulphide ◽

Angular Distributions ◽

X Rays ◽

Evaporation Process ◽

Light Elements ◽

Energy Distributions ◽

High Energy Tail ◽

Nuclear Temperature ◽

Energy And Angular Distributions

The angular distributions of the photoneutrons produced by 70-Mev. X-rays in seven elements have been measured with a zinc sulphide – lucite scintillation detector. For the heavy elements the distributions are essentially isotropic, indicating the predominance of the evaporation process, while for the light elements there is also an anisotropic component peaked at 90°. The energy distributions of the photoneutrons produced in copper and lead targets have been determined with nuclear emulsions. It is shown that most of the neutrons can be attributed to an evaporation process which is governed by a constant nuclear temperature, the temperature found for copper being 1.2 Mev., and for lead being 1.0 Mev. A high-energy tail on the energy distributions is attributed to direct interactions.

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Photodissociation of the SO2⋅SO+2 dimer in the visible region of the spectrum: Product relative kinetic energy distributions and product angular distributions

The Journal of Chemical Physics ◽

10.1063/1.448367 ◽

1985 ◽

Vol 82 (4) ◽

pp. 1832-1840 ◽

Cited By ~ 27

Author(s):

Martin F. Jarrold ◽

Andreas J. Illies ◽

Michael T. Bowers

Keyword(s):

Kinetic Energy ◽

Visible Region ◽

Angular Distributions ◽

Energy Distributions ◽

Relative Kinetic Energy ◽

Relative Kinetic ◽

Kinetic Energy Distributions

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CALCULATING TWO- AND THREE-BODY DECAYS WITH FeynArts AND FormCalc

International Journal of Modern Physics C ◽

10.1142/s012918310300539x ◽

2003 ◽

Vol 14 (09) ◽

pp. 1273-1278 ◽

Cited By ~ 4

Author(s):

MICHAEL KLASEN

Keyword(s):

Standard Model ◽

Particle Production ◽

High Energy Physics ◽

High Energy ◽

Energy Distributions ◽

Particle Decay ◽

The Standard Model ◽

Decay Widths ◽

Three Body ◽

Energy Physics

The Feynman diagram generator FeynArts and the computer algebra program FormCalc allow for an automatic computation of 2→2 and 2→3 scattering processes in High Energy Physics. We have extended this package by four new kinematical routines and adapted one existing routine in order to accomodate also two- and three-body decays of massive particles. This makes it possible to compute automatically two- and three-body particle decay widths and decay energy distributions as well as resonant particle production within the Standard Model and the Minimal Supersymmetric Standard Model at the tree- and loop-level. The use of the program is illustrated with three standard examples: [Formula: see text], [Formula: see text], and [Formula: see text].

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INELASTIC PHOTOPRODUCTION OF W-BOSON

Modern Physics Letters A ◽

10.1142/s0217732398002114 ◽

1998 ◽

Vol 13 (25) ◽

pp. 2013-2020

Author(s):

S. M. KHAIRUL ALAM ◽

A. M. HARUN AR RASHID

Keyword(s):

Differential Cross Section ◽

Cross Section ◽

W Boson ◽

Electric Quadrupole ◽

Parton Model ◽

High Energy ◽

Electric Quadrupole Moment ◽

Photoproduction Process ◽

Quark Parton Model ◽

High Energy Collider

We study the WWγ vertex through the process γq→Wq′ where q denotes the quark at a future high energy collider. The differential cross-section for the photoproduction process γq→Wq′ is computed with both anomalous magnetic moment κ and electric quadrupole moment λ for the W-boson. The deep inelastic photoproduction of W± is also calculated in a quark-parton model.

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Monte Carlo studies on electromagnetic cascades in extensive air showers

Canadian Journal of Physics ◽

10.1139/p68-205 ◽

1968 ◽

Vol 46 (10) ◽

pp. S189-S196 ◽

Cited By ~ 2

Author(s):

K. O. Thielheim ◽

E. K. Schlegel ◽

R. Beiersdorf

Keyword(s):

Monte Carlo ◽

Electron Density ◽

Three Dimensional ◽

High Energy ◽

Extensive Air Showers ◽

Air Showers ◽

Energy Distributions ◽

The Core ◽

Fragmentation Mechanisms ◽

Monte Carlo Studies

Three-dimensional Monte Carlo calculations have been performed on the trajectories of high-energy hadrons in extensive air showers. The central electron density and gradient of distribution are obtained for individual electromagnetic cascades together with coordinates at the level of observation. Various assumptions concerning primary mass number and energy, distributions of strong interaction parameters, and fragmentation mechanisms are discussed with respect to the production of steep maxima of electron density by single electromagnetic cascades in the core region of extensive air showers.

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