Electronic Structure of Liquid Mercury Using Compton Scattering Technique

2004 ◽  
Vol 59 (9) ◽  
pp. 543-549 ◽  
Author(s):  
B. L. Ahuja ◽  
M. Sharma ◽  
S. Mathur
Keyword(s):  
Compton Scattering ◽  
Gamma Ray ◽  
High Energy ◽  
Background Correction ◽  
Compton Profile ◽  
Electron Configuration ◽  
Bremsstrahlung Radiation ◽  
Energy Gamma ◽  
Compton Electrons ◽  
First Time

The isotropic Compton profile of mercury has been measured, using 661.65 keV gamma-rays from a 20 Ci 137Cs source. To extract the true experimental Compton line shape, besides the usual systematic corrections we have incorporated for the first time the background correction due to bremsstrahlung radiation generated by photo and Compton electrons. Theoretical computations have been carried out, using the renormalised-free-atom (RFA) for the electron configuration 4f145d106s2 and free electron models. It is found that the present experimental data with bremsstrahlung background correction are in better agreement with the RFA calculations. This work suggests the incorporation of the bremsstrahlung background correction in Compton scattering experiments of heavy materials using high-energy gamma-ray sources.

scholarly journals On a Heuristic Viewpoint Concerning the Quantized Space-time

2020 ◽  
Author(s):  
Yuchen Liu
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Space Time ◽  
Theory Of Relativity ◽  
Unified Framework ◽  
Origin And Evolution ◽  
Modern Physics ◽  
Energy Gamma ◽  
High Energy Emission ◽  
First Time

Einstein's theory of relativity revolutionized the view of space-time in physics, and its basic inferences have been continuously verified in the past 100 years. However, the theory of relativity is built on the basis of continuous and smooth space-time, and it cannot be compatible with the concept of discrete space-time in quantum mechanics, which causes many difficulties in the development of modern physics. This paper presents for the first time a heuristic viewpoint in which space-time is considered to be a type of quantized waves propagating at the speed of light. Based on this concept, it re-explains many inferences of special relativity and general relativity, proposes new theory on gravitation and space-time, and provides a preliminary unified framework for explaining dark matter, dark energy, gamma-ray bursts, high energy emission mechanisms in quasar, the origin and evolution of the universe and other difficult problems in modern physics.

scholarly journals Generation of High Energy Gamma-ray by Laser Compton Scattering of 1.94-μm Fiber Laser in UVSOR-III Electron Storage Ring

2016 ◽  
Vol 89 ◽  
pp. 335-345 ◽  
Author(s):  
Heishun Zen ◽  
Yoshitaka Taira ◽  
Taro Konomi ◽  
Takehito Hayakawa ◽  
Toshiyuki Shizuma ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Compton Scattering ◽  
Storage Ring ◽  
Gamma Ray ◽  
High Energy ◽  
Electron Storage ◽  
High Energy Gamma ◽  
Energy Gamma ◽  
Laser Compton Scattering

scholarly journals Gamma-ray source through inverse Compton scattering in a thermal hohlraum

2013 ◽  
Vol 31 (4) ◽  
pp. 607-611 ◽  
Author(s):  
Y.L. Ping ◽  
X.T. He ◽  
H. Zhang ◽  
B. Qiao ◽  
H.B. Cai ◽  
...  
Keyword(s):  
Electron Beam ◽  
Relativistic Electron ◽  
Compton Scattering ◽  
Relativistic Electron Beam ◽  
Gamma Ray ◽  
High Energy ◽  
Inverse Compton Scattering ◽  
Inverse Compton ◽  
Energy Gamma ◽  
Background Temperature

AbstractA new inverse Compton scattering scheme for production of high-energy Gamma-ray sources is proposed in which a Giga-electronvolt (GeV) electron beam is injected into a thermal hohlraum. It is found that by increasing the hohlraum background temperature, the scattered photons experience kinematic pileup, resulting in more monochromatic spectrum and smaller scattering angle. When a relativistic electron beam with energy 1 GeV and charge 10nC is injected into a 0.5 keV hohlraum, 80% of the scattered photons have energy above 0.5 GeV.

FEATURES OF MAGNETIC STRUCTURE OF SUNSPOTS GROUPS AT DEVELOPMENT OF SUSTAINED FLUXES HIGH ENERGY GAMMA RAY

2020 ◽  
Vol 3 (331) ◽  
pp. 66-72
Author(s):  
Gennady Sergeevich, Minasyants ◽  
◽  
Tamara Mihailovna, Minasyants ◽  
Vladimir Mihailovich, Tomozov ◽  
◽  
...  
Keyword(s):  
Magnetic Structure ◽  
Gamma Ray ◽  
High Energy ◽  
High Energy Gamma ◽  
Energy Gamma

scholarly journals Introducing the HD+B model for pulsar wind nebulae: a hybrid hydrodynamics/radiative approach

2020 ◽  
Vol 494 (3) ◽  
pp. 4357-4370
Author(s):  
B Olmi ◽  
D F Torres
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Theoretical Modelling ◽  
X Rays ◽  
Pulsar Wind Nebulae ◽  
New Approach ◽  
Energy Gamma ◽  
Radiative Model ◽  
Pulsar Wind

ABSTRACT Identification and characterization of a rapidly increasing number of pulsar wind nebulae is, and will continue to be, a challenge of high-energy gamma-ray astrophysics. Given that such systems constitute -by far- the most numerous expected population in the TeV regime, such characterization is important not only to learn about the sources per se from an individual and population perspective, but also to be able to connect them with observations at other frequencies, especially in radio and X-rays. Also, we need to remove the emission from nebulae in highly confused regions of the sky for revealing other underlying emitters. In this paper, we present a new approach for theoretical modelling of pulsar wind nebulae: a hybrid hydrodynamic-radiative model able to reproduce morphological features and spectra of the sources, with relatively limited numerical cost.

scholarly journals Introduction to high-energy gamma-ray astronomy

2015 ◽  
Vol 16 (6-7) ◽  
pp. 587-599 ◽  
Author(s):  
Bernard Degrange ◽  
Gérard Fontaine
Keyword(s):  
Gamma Ray ◽  
High Energy ◽  
Gamma Ray Astronomy ◽  
High Energy Gamma ◽  
Energy Gamma
Sign in / Sign up

Export Citation Format

Share Document