Results 41 to 50 of about 61,814 (221)

Role of line-of-sight cosmic ray interactions in forming the spectra of distant blazars in TeV gamma rays and high-energy neutrinos

, 2011
Active galactic nuclei (AGN) can produce both gamma rays and cosmic rays. The observed high-energy gamma-ray signals from distant blazars may be dominated by secondary gamma rays produced along the line of sight by the interactions of cosmic-ray protons ...
Beacom, John F., Essey, Warren, Kalashev, Oleg, Kusenko, Alexander   +3 more
core   +1 more source

Prospects of the air-shower radio array at the Tien Shan high-altitude scientific station

Вестник. Серия физическая, 2021
High energy astrophysics has been actively developed since the last decades. The photons and neutrinos produced at astrophysical sources were detected up to energies of PeV, while the measured spectrum of cosmic rays lasts from GeV to ZeV energies.
P.A. Bezyazeekov, O. Fedorov, D. Kostunin   +2 more
doaj   +1 more source

Interpretation of radio continuum and molecular line observations of Sgr B2: free-free and synchrotron emission, and implications for cosmic rays [PDF]

, 2008
Recent ammonia (1,1) inversion line data on the Galactic star forming region Sgr B2 show that the column density is consistent with a radial Gaussian density profile with a standard deviation of 2.75 pc.
Aharonian, Beakom, Beatty, Brogan, Cesarsky, Cheng, Crocker, Crutcher, Crutcher, D. I. Jones, de Pree, Dogel', Fryer, Gabici, Gaume, Gaume, Goicoechea, Gordon, Grimani, J. Ott, Jones, Jones, LaRosa, Lis, Mayer-Hasselwander, Moskalenko, Murakami, Murakami, Ott, Panagia, R. D. Ekers, R. J. Protheroe, R. M. Crocker, Rybicki, Sato, Skilling, Takagi, Tsuboi, van der Tak, Weidenspointner, Yusef-Zadeh   +40 more
core   +3 more sources

Stand-Alone Cosmic-Ray Tomography with Secondary Particles [PDF]

Journal of Advanced Instrumentation in Science
Cosmic ray tomography usually focusses on two key approaches: muon transmission and muon scattering tomography. Secondary particles produced from the interaction of air shower particles with the target material have not been fully exploited so far, although they have been proven to carry complementary information directly related to the target material
Pérez Prada, Maximilian, Barnes, Sarah, Stephan, Maurice   +2 more
openaire   +2 more sources

Observing cosmic-ray extensive air showers with a silicon imaging detector

Scientific Reports, 2023
Extensive air showers induced from high-energy cosmic rays provide a window into understanding the most energetic phenomena in the universe. We present a new method for observing these showers using the silicon imaging detector Subaru Hyper Suprime-Cam ...
Satoshi Kawanomoto, Michitaro Koike, Fraser Bradfield, Toshihiro Fujii, Yutaka Komiyama, Satoshi Miyazaki, Tomoki Morokuma, Hitoshi Murayama, Masamune Oguri, Tsuyoshi Terai   +9 more
doaj   +1 more source

Time structure of gamma-ray signals generated in line-of-sight interactions of cosmic rays from distant blazars

, 2012
Blazars are expected to produce both gamma rays and cosmic rays. Therefore, observed high-energy gamma rays from distant blazars may contain a significant contribution from secondary gamma rays produced along the line of sight by the interactions of ...
Aharonian, Felix, Essey, Warren, Kusenko, Alexander, Prosekin, Anton   +3 more
core   +1 more source

Cosmic-Ray Positrons: Are There Primary Sources? [PDF]

, 1999
Cosmic rays at the Earth include a secondary component originating in collisions of primary particles with the diffuse interstellar gas. The secondary cosmic rays are relatively rare but carry important information on the Galactic propagation of the ...
Agrinier, Aharonian, Allan Labrador, Amit Bhattacharyya, Andrew D. Tomasch, Baltz, Barbiellini, Barwick, Barwick, Barwick, Barwick, Basini, Boulares, Buffington, Chi, Christopher J. Chaput, Chuck R. Bower, Clem, Daugherty, Dietrich Müller, Dogiel, Eric Schneider, Eric Torbet, Fanselow, Georgia A. de Nolfo, Golden, Golden, Golden, Gregory Tarlé, Harding, James A. Musser, James J. Beatty, Jungman, Kamionkowski, Michael A. DuVernois, Moskalenko, Müller, Protheroe, Roe, Scott L. Nutter, Shawn P. McKee, Simon P. Swordy, Skibo, Steven W. Barwick, Stéphane Coutu, Tang, Turner, Tylka   +47 more
core   +2 more sources

Production of Secondary Cosmic Rays in Supernova Remnants [PDF]

Proceedings of The 34th International Cosmic Ray Conference — PoS(ICRC2015), 2016
We study production of secondary cosmic rays (CR) in supernova remnants (SNR). The model includes reacceleration of already existing in interstellar medium secondary CR particles as well as creation of secondary CRs in nuclear collisions of accelerated protons with gas nuclei and their subsequent acceleration by SNR shock.
Leonid Ksenofontov, Evgeny Berezhko
openaire   +1 more source

Secondary Radiation Produced by Cosmic Rays [PDF]

Nature, 1932
ON August 12, the date on which Regener obtained his very high-altitude cosmic ray data, using self-recording apparatus carried by a balloon,1 measurements were made on a mountain-top in the Himalaya at an altitude of about 19,500 ft. The results of these measurements indicate clearly that the ionisation of gas in an ionisation chamber is due at least ...
openaire   +1 more source

Deterministic Detection of Single Ion Implantation

Advanced Engineering Materials, Volume 28, Issue 11, 3 June 2026.
Focused ion beam implantation with high detection efficiencies will enable the rapid and scalable fabrication of advanced spin‐based technologies such as qubits. This work presents the detection efficiencies of a wide range of ions implanted into solid‐state hosts, with efficiencies of >90% recorded for ion species and substrate combinations of ...
Mason Adshead, Lok Kan Wan, Maddison Coke, Janet Jacobs, Nicholas F. L. Collins, Mark C. Rosamond, Richard J. Curry   +6 more
wiley   +1 more source