%0 Journal Article %1 Adriani69 %A Adriani, O. %A Barbarino, G. C. %A Bazilevskaya, G. A. %A Bellotti, R. %A Boezio, M. %A Bogomolov, E. A. %A Bonechi, L. %A Bongi, M. %A Bonvicini, V. %A Borisov, S. %A Bottai, S. %A Bruno, A. %A Cafagna, F. %A Campana, D. %A Carbone, R. %A Carlson, P. %A Casolino, M. %A Castellini, G. %A Consiglio, L. %A De Pascale, M. P. %A De Santis, C. %A De Simone, N. %A Di Felice, V. %A Galper, A. M. %A Gillard, W. %A Grishantseva, L. %A Jerse, G. %A Karelin, A. V. %A Koldashov, S. V. %A Krutkov, S. Y. %A Kvashnin, A. N. %A Leonov, A. %A Malakhov, V. %A Malvezzi, V. %A Marcelli, L. %A Mayorov, A. G. %A Menn, W. %A Mikhailov, V. V. %A Mocchiutti, E. %A Monaco, A. %A Mori, N. %A Nikonov, N. %A Osteria, G. %A Palma, F. %A Papini, P. %A Pearce, M. %A Picozza, P. %A Pizzolotto, C. %A Ricci, M. %A Ricciarini, S. B. %A Rossetto, L. %A Sarkar, R. %A Simon, M. %A Sparvoli, R. %A Spillantini, P. %A Stozhkov, Y. I. %A Vacchi, A. %A Vannuccini, E. %A Vasilyev, G. %A Voronov, S. A. %A Yurkin, Y. T. %A Wu, J. %A Zampa, G. %A Zampa, N. %A Zverev, V. G. %D 2011 %I American Association for the Advancement of Science %J Science %K pamela_exp %N 6025 %P 69--72 %R 10.1126/science.1199172 %T PAMELA Measurements of Cosmic-Ray Proton and Helium Spectra %U http://science.sciencemag.org/content/332/6025/69 %V 332 %X Protons and helium nuclei are the most abundant components of the cosmic radiation. Precise measurements of their fluxes are needed to understand the acceleration and subsequent propagation of cosmic rays in our Galaxy. We report precision measurements of the proton and helium spectra in the rigidity range 1 gigavolt to 1.2 teravolts performed by the satellite-borne experiment PAMELA (payload for antimatter matter exploration and light-nuclei astrophysics). We find that the spectral shapes of these two species are different and cannot be described well by a single power law. These data challenge the current paradigm of cosmic-ray acceleration in supernova remnants followed by diffusive propagation in the Galaxy. More complex processes of acceleration and propagation of cosmic rays are required to explain the spectral structures observed in our data.

@article{Adriani69, abstract = {Protons and helium nuclei are the most abundant components of the cosmic radiation. Precise measurements of their fluxes are needed to understand the acceleration and subsequent propagation of cosmic rays in our Galaxy. We report precision measurements of the proton and helium spectra in the rigidity range 1 gigavolt to 1.2 teravolts performed by the satellite-borne experiment PAMELA (payload for antimatter matter exploration and light-nuclei astrophysics). We find that the spectral shapes of these two species are different and cannot be described well by a single power law. These data challenge the current paradigm of cosmic-ray acceleration in supernova remnants followed by diffusive propagation in the Galaxy. More complex processes of acceleration and propagation of cosmic rays are required to explain the spectral structures observed in our data.}, added-at = {2019-01-21T15:49:42.000+0100}, author = {Adriani, O. and Barbarino, G. C. and Bazilevskaya, G. A. and Bellotti, R. and Boezio, M. and Bogomolov, E. A. and Bonechi, L. and Bongi, M. and Bonvicini, V. and Borisov, S. and Bottai, S. and Bruno, A. and Cafagna, F. and Campana, D. and Carbone, R. and Carlson, P. and Casolino, M. and Castellini, G. and Consiglio, L. and De Pascale, M. P. and De Santis, C. and De Simone, N. and Di Felice, V. and Galper, A. M. and Gillard, W. and Grishantseva, L. and Jerse, G. and Karelin, A. V. and Koldashov, S. V. and Krutkov, S. Y. and Kvashnin, A. N. and Leonov, A. and Malakhov, V. and Malvezzi, V. and Marcelli, L. and Mayorov, A. G. and Menn, W. and Mikhailov, V. V. and Mocchiutti, E. and Monaco, A. and Mori, N. and Nikonov, N. and Osteria, G. and Palma, F. and Papini, P. and Pearce, M. and Picozza, P. and Pizzolotto, C. and Ricci, M. and Ricciarini, S. B. and Rossetto, L. and Sarkar, R. and Simon, M. and Sparvoli, R. and Spillantini, P. and Stozhkov, Y. I. and Vacchi, A. and Vannuccini, E. and Vasilyev, G. and Voronov, S. A. and Yurkin, Y. T. and Wu, J. and Zampa, G. and Zampa, N. and Zverev, V. G.}, biburl = {https://www.bibsonomy.org/bibtex/242a574cc8a4a275bbd0648720cfc410c/pamela_exp}, doi = {10.1126/science.1199172}, eprint = {http://science.sciencemag.org/content/332/6025/69.full.pdf}, interhash = {11735e50703ee5be5d6cad5779682009}, intrahash = {42a574cc8a4a275bbd0648720cfc410c}, issn = {0036-8075}, journal = {Science}, keywords = {pamela_exp}, number = 6025, pages = {69--72}, publisher = {American Association for the Advancement of Science}, timestamp = {2019-01-21T15:49:42.000+0100}, title = {PAMELA Measurements of Cosmic-Ray Proton and Helium Spectra}, url = {http://science.sciencemag.org/content/332/6025/69}, volume = 332, year = 2011 }