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  1. Vor 4 Stunden · The dose rate of 137 Cs γ-rays in air (i.e., air kerma rate) was measured using an ionization chamber (NE 2571, Nuclear Enterprises Technology Ltd., Reading, UK), and converted to that in water ...

  2. Vor 3 Tagen · These γ -rays have been measured as diffuse glow of the Milky Way, and would also be expected from inside the Local Bubble as foreground emission. Based on two scenarios, one employing a geometrical model and the other state-of-the-art hydrodynamics simulations, we estimate the expected fluxes of the 1332 and 1809 keV γ -ray lines, as well as ...

  3. Vor 4 Tagen · The investigation of ultrahigh-energy gamma-ray astronomy [ 1] is pivotal for understanding a range of extreme astrophysical phenomena. These ultrahigh-energy gamma rays predominantly originate from highly active galactic nuclei, cataclysmic supernova explosions, neutron stars, and black holes. Importantly, these observations form an empirical cornerstone for addressing some of the most ...

  4. Vor 5 Tagen · The bright rings form as a result of X-rays scattered from otherwise unobservable dust layers within our galaxy that lie in the direction of the burst. Most observed events (70%) have a duration of greater than two seconds and are classified as long gamma-ray bursts.

  5. Vor 3 Tagen · Detecting γ-ray flares from more dwarf stars can improve our understanding of their magnetospheric properties, and could also indicate a diminished likelihood of their planets’ habitability. In this work, we stack data from the Fermi Gamma-ray Space Telescope during a large number of events identified from optical and X-ray flare ...

  6. Vor 3 Tagen · Furthermore, the study demonstrates that phase consistency in the alpha and low gamma band can reflect the distribution of orientation-selective neuron numbers in the four main orientations in the ...

  7. Vor 4 Tagen · This matrix was used to establish the correlations among the 𝛾 \gamma italic_γ rays across the isomeric states. The spectroscopic information of 217 Ac was extracted on the basis of coincidence relationships among the observed 𝛾 \gamma italic_γ rays, their relative intensities, and multipolarities.