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Hace 4 días · In this work, we search for gamma-ray emission during four flaring periods from 2015-2023 using the Fermi Large Area Telescope (LAT) gamma-ray telescope. The LAT is one of the two instruments onboard this detector. Fermi-LAT is sensitive to high-energy gamma rays from a plethora of astrophysical sources (Ajello et al. 2019). It is a
Hace 3 días · The Astroparticle Physics Laboratory conducts research in cosmic ray and gamma ray high-energy astrophysics. Researchers investigate high-energy phenomena in the universe in terms of unified theories of fundamental interactions. The Laboratory conducts a broad range of space-based scientific studies of the origin, nature, and effect of cosmic rays.
18 de may. de 2024 · Gamma rays are highly energetic electromagnetic waves that are produced during certain nuclear reactions and radioactive decay processes. They have the shortest wavelength and highest frequency among all forms of electromagnetic radiation. How do gamma rays differ from other forms of radiation?
Hace 3 días · [Submitted on 27 May 2024] Supernova Remnants in Gamma Rays. Andrea Giuliani, Martina Cardillo. In the 1960s, the remnants of supernova explosions (SNRs) were indicated as a possible source of galactic cosmic rays through the Diffusive Shock Acceleration (DSA) mechanism.
Hace 5 días · The NAIRAS model predicts biologically hazardous radiation exposure to crew and passengers onboard aircraft or spacecraft from the ever-present galactic cosmic rays (GCR), inner radiation belt trapped protons (TRP) in low-Earth orbit (LEO), and the episodic, transient solar energetic particles (SEP) originating from solar eruptive ...
Hace 2 días · The energy of the gamma ray can be measured to high precision by X-ray diffraction techniques, as was first done by Bell and Elliot in 1948. The best modern (1986) values for neutron mass by this technique are provided by Greene, et al. These give a neutron mass of: m neutron = 1.008 644 904 (14) Da
Hace 5 días · Description. The gamma-ray/neutron spectrometer (GR/NS) is designed to map major element (O, Si, Fe, Ti, Mg, Al, Ca) and trace element (U, Th, K, H, Gd, Sm) composition of the surfaces of Vesta and Ceres in order to help determine their geological composition.
