Gamma-ray Interaction Processes with Matter:
Dark Matter Signals in the gamma-ray sky
... Figure 6. Inferred ATLAS 95% CL limits on WIMP annihilation rates versus mass The thick solid lines are the observed limits excluding theoretical uncertainties. The ATLAS limits are for the four light quark flavours ...
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Gamma-Ray Effects of Dark Forces in Dark Matter Clumps
... dark matter (DM) particles implies the existence of a new Coulomb-like interaction, which leads to Sommerfeld-Gamow-Sakharov enhancement of dark matter annihilation at low relative ...dark ...
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Dark matter contribution to Galactic diffuse gamma ray emission
... dark matter annihilations or de- ...baryonic matter effect covers extreme cases, it is still worth trying a more realistic profile directly from simulations; 2) in addition to the mass and cross-section of ...
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A Comprehensive Study of Gamma Ray Interaction Parameters in Dana's Minerals
... as gamma ray shielding materials, some parameters of dosimetric interest has been investigated at incident photon energies from 15 keV to 15 MeV and penetration depth upto 40 ...photon interaction ...
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Gamma-ray signatures of annihilation to charged leptons in dark matter substructure
... dark matter governs dynamics in the inner regions [ 99 ...since gamma- ray measurements of the inner Galaxy can strongly con- strain annihilations in the smooth halo for the density profiles ...
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Gamma-Ray Pulsars
... radiation processes also opens the way to uncover the true nature of some of the presently unidentified γ-ray ...the processes leading to the formation of neutron ...
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Gamma ray photon interaction studies of Cr in the energy range 10keV to 1500keV
... determine gamma ray attenuation coefficients very accurately by using a narrow-collimated-beam method which effectively excluded corrections due to small- angle and multiple scattering of ...1500keV ...
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Muon interaction with lead shielding producing activation: implications for gamma-ray spectrometry
... associated processes, isotope tracking and counting is ...with matter, energy, energy deposition, position, particle direction can all be accessed through this ...
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Medium-Energy Gamma-Ray Astrophysics with the 3-DTI Gamma-Ray Telescope
... This intermediate mission, with a 10-fold increase in narrow-line, broad-line, and continuum sensitivity over COMPTEL, would bridge the science from COMPTEL to ACT, fill in the multi-wavelength coverage gap between ...
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Constraining Dark Matter and Ultra-High Energy Cosmic Ray Sources with Fermi-LAT Diffuse Gamma Ray Background
... that unresolved point γ–ray sources, such as Active Galactic Nuclei or Star Forming Galaxies may account for up to 100% of IGRB flux and at least 86% of integral isotropic flux above 50 GeV. This leaves little space ...
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Study of Photon Interaction Parameters for Some Oxide Glasses as Gamma Ray Shielding Materials
... "stochasic effects".Different types of ionizing radiation interact in different ways with shielding material. The effectiveness of shielding is dependent on the stopping power of radiation particles, which varies with ...
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Python for gamma-ray astronomy
... non-thermal processes in the Universe these observations have provided a deep insight into a number of fundamental problems of high energy astrophysics and astroparticle ...
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On the Gamma Ray Bursts Origin
... non-thermal gamma-rays are supposed to be produced by a fireball of relativistic e − e + pairs that are created by annihilation of neutrino-antineutrino pairs in the vicinity of the hot, merged ...gravitational ...
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Gamma-ray Imaging Methods
... that matter divergent and convergent collimators as well) is not able to sufficiently resolve structure within its ...the gamma-ray flux in the given ...the gamma rays in air and ...
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Gamma Ray Scintillation Spectroscopy
... the gamma ray energy, especially in the case where the crystal used is anthracene or stilbene (organic) , or a plastic scintillator, where the probability of the photoelectric effect is very ...
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Modelling gamma-ray photon emission and pair production in high-intensity laser-matter interactions
... to gamma- ray photons & ...emission processes only correctly describes the evolution of the particle spectra when pair production can be neglected and so is only valid over a relatively narrow range ...
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Modelling gamma ray photon emission and pair production in high intensity laser–matter interactions
... to gamma- ray photons & ...emission processes only correctly describes the evolution of the particle spectra when pair production can be neglected and so is only valid over a relatively narrow range ...
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Dark matter searches in the gamma-ray extragalactic background via cross-correlations with galaxy catalogs
... ABSTRACT We compare the measured angular cross-correlation between the Fermi-Large Area Telescope γ-ray sky and catalogs of extragalactic objects with the expected signal induced by weakly interacting massive ...
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A Study of Neutron and Gamma Ray Interaction Properties with Cobalt Free Highly Chromium Maraging Steel
... Another serious point to remove cobalt is that, it has radioactive isotopes ( 60 Co) resulted from irradiation with high energy neutron flux and this is dangerous to be used as a shielding material. 60 Co nucleus emits ...
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Influence of roasting, gamma ray irradiation and microwaving on ruminal dry matter and crude protein digestion of cottonseed
... c ray irradiation of cottonseed meal had significant effect on decreasing CP and amino acid degradation in rumen but this effect was less than that of electron beam ...that gamma irradiation at dose of 30 ...
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