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Autor:
Seckel, David, Stanev, Todor
Publikováno v:
Phys.Rev.Lett.95:141101,2005
Observations of ultrahigh energy cosmic rays (UHECR) do not uniquely determine both the injection spectrum and the evolution model for UHECR sources - primarily because interactions during propagation obscure the early Universe from direct observatio
Externí odkaz:
http://arxiv.org/abs/astro-ph/0502244
Autor:
Razzaque, Soebur, Seunarine, Surujhdeo, Besson, David Z., McKay, Douglas W., Ralston, John P., Seckel, David
Publikováno v:
Phys.Rev.D65:103002,2002
Radio Cherenkov radiation is arguably the most efficient mechanism for detecting showers from ultra-high energy particles of 1 PeV and above. Showers occuring in Antarctic ice should be detectable at distances up to 1 km. We report on electromagnetic
Externí odkaz:
http://arxiv.org/abs/astro-ph/0112505
Publikováno v:
Phys.Rev.D68:103004,2003
We study the proton flux expected from sources of ultra high energy cosmic rays (UHECR) in the presence of regular extragalactic magnetic fields. It is assumed that a local source of ultra-high energy protons and the magnetic field are all in a wall
Externí odkaz:
http://arxiv.org/abs/astro-ph/0108338
Publikováno v:
Phys.Rev.D64:093010,2001
We present a calculation of the production of neutrinos during propagation of ultra-high energy cosmic rays from their astrophysical sources to us. Photoproduction interactions are modeled with the event generator SOPHIA that represents very well the
Externí odkaz:
http://arxiv.org/abs/astro-ph/0101216
Autor:
Raffelt, Georg, Seckel, David
Publikováno v:
Phys.Rev.D52:1780-1799,1995
The problem of neutral-current processes (neutrino scattering, pair emission, pair absorption, axion emission, \etc) in a nuclear medium can be separated into an expression representing the phase space of the weakly interacting probe, and a set of dy
Externí odkaz:
http://arxiv.org/abs/astro-ph/9312019
Autor:
Seckel, David
The thermal rates for converting neutrons to protons, and vice versa, are calculated, including corrections of order 1 MeV divided by a nucleon mass. The results imply that the primodial helium abundance predicted for big bang nucleosynthesis has bee
Externí odkaz:
http://arxiv.org/abs/hep-ph/9305311
Publikováno v:
In Nuclear Physics B (Proceedings Supplements) 2002 110:491-493
Autor:
Adams, J., Allen, Chris, Bean, A., Besson, David Z., Box, D. J., Buniy, R., Drees, J., Frichter IV, George M., Kravchenko, Igor, McKay, D., Meyers, J., Miller, T., Perry, L., Piccirillo, L., Ralston, John P., Razzaque, S., Schmitz, D. W., Seckel, David, Seunarine, S., Spiczak, G. M.
Publikováno v:
Proceedings of SPIE; Nov2003, Issue 1, p179-190, 12p
Autor:
Barwick, S. W., Beatty, James J., Besson, David Z., Clem, John M., Coutu, Stephane, DuVernois, Michael A., Evenson, Paul A., Gorham, Peter W., Halzen, Francis L., Jacobson, Abram, Kieda, David, Learned, John G., Liewer, Kurt M., Lowe, Stephen T., Naudet, Charles J., Odian, Allen C., Saltzberg, David, Seckel, David
Publikováno v:
Proceedings of SPIE; Nov2003, Issue 1, p265-276, 12p