Results 41 to 50 of about 3,889,913 (343)
Scientific Reports, 2021 Multi-tracer imaging can provide useful information in the definitive diagnosis and research of medical, biological, and pharmaceutical sciences. Single-photon emission computed tomography (SPECT) is one of the nuclear medicine imaging modalities widely ...
Mizuki Uenomachi +3 more
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Transparency of the Universe to gamma-rays [PDF]
, 2013 Using the most recent observational data concerning the Extragalactic Background Light and the Radio Background, for a source at a redshift z_s < 3 we compute the energy E_0 of an observed gamma-ray photon in the range 10 GeV < E_0 < 10^13 GeV such that ...
A. Angelis, G. Galanti, M. Roncadelli
semanticscholar +1 more source
GAMMA-RAY OBSERVATIONS OF GAMMA-RAY BINARIES [PDF]
International Journal of Modern Physics: Conference Series, 2014 Gamma-ray binaries are binary systems that emit most of their radiative output above 1 MeV. Following the detection of five such systems in the past decade, they have been clearly established as a population of galactic GeV and TeV sources. In this review I discuss their recent gamma-ray observational results from Cherenkov telescopes and the Fermi ...
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Extended gamma-ray sources around pulsars constrain the origin of the positron flux at Earth [PDF]
Science, 2017 Exotic origin for cosmic positrons Several cosmic-ray detectors have found more positrons arriving at Earth than expected. Some researchers interpret this as a signature of exotic physics, such as the annihilation of dark matter particles.
A. Abeysekara +115 more
semanticscholar +1 more source
New applications and developments in the neutron shielding
EPJ Web of Conferences, 2017 Shielding neutrons involve three steps that are slowing neutrons, absorption of neutrons, and impregnation of gamma rays. Neutrons slow down with thermal energy by hydrogen, water, paraffin, plastic. Hydrogenated materials are also very effective for the
Uğur Fatma Aysun
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Radiation effect on germination and seedling traits in rice (Oryza sativa L.)
Electronic Journal of Plant Breeding, 2019 The biological effect of new source of physical mutagen viz., electron beam over gamma rays were studied with different dosages in the M1 generation of rice during 2017-18.
R. Lalitha +6 more
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Particles, Strings and Cosmology (PASCOS 99), 2000 Ultra-high-energy, >10^19 eV, cosmic-ray and high energy, ~10^14 eV, neutrino production in GRBs is discussed in the light of recent GRB and cosmic-ray observations. Emphasis is put on model predictions that can be tested with operating and planned cosmic-ray and neutrino detectors, and on the prospects of testing for neutrino properties.
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Constraining Very Heavy Dark Matter Using Diffuse Backgrounds of Neutrinos and Cascaded Gamma Rays [PDF]
, 2012 We consider multi-messenger constraints on very heavy dark matter (VHDM) from recent Fermi gamma-ray and IceCube neutrino observations of isotropic background radiation.
K. Murase, J. Beacom
semanticscholar +1 more source
The Gamma‐Ray Observatory [PDF]
Annals of the New York Academy of Sciences, 1989 AbstractThe Gamma-Ray Observatory (GRO), a Shuttle-launched free-flying Observatory is currently scheduled for launch in November 1990. The mission provides nearly six orders of magnitude in spectral coverage, from about 50 KeV to about 30 GeV, with a sensitivity over the entire range over an order of magnitude greater than that of previous ...
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Probit analysis and effect of electron beam and gamma rays in blackgram (Vigna mungo (L.) Hepper)
Electronic Journal of Plant Breeding, 2017 An experimental investigation was carried out to determine the lethal dose (LD50) of electron beam and gamma rays on two black gram varieties viz., MDU 1, VBN (Bg) 4. The lethal dose was determined by probit analysis. Dry seeds of both the varieties were
K. Veni +2 more
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