Propagation and Source Energy Spectra of Cosmic-Ray Nuclei at High Energies Export

@article{citeulike:3423544, abstract = {A recent measurement of the TRACER instrument on long-duration balloon has determined the individual energy spectra of the major primary cosmic-ray nuclei from oxygen (Z=8) to iron (Z=26). The measurements cover a large range of energies and extend to energies beyond 10^14 eV. We investigate if the data set can be described by a simple but plausible model for acceleration and propagation of cosmic rays. The model assumes a power-law energy spectrum at the source with a common spectral index alpha for all nuclear species, and an energy dependent propagation pathlength (Lambda proportional to E^-0.6) combined with an energy-independent residual pathlength Lambda\_0. We find that the data can be fit with a fairly soft source spectrum alpha=2.3-2.4), and with a residual pathlength Lambda\_0 as high as 0.3 g cm^-2. We discuss this model in the context of other pertinent information, and we determine the relative abundances of the elements at the cosmic-ray source.}, archivePrefix = {arXiv}, author = {Ave, M. and Boyle, P. J. and Hoeppner, C. and Marshall, J. and Muller, D.}, citeulike-article-id = {3423544}, citeulike-linkout-0 = {http://arxiv.org/abs/0810.2972}, citeulike-linkout-1 = {http://arxiv.org/pdf/0810.2972}, day = {16}, eprint = {0810.2972}, keywords = {composition, cr, propagation}, month = {Oct}, posted-at = {2008-10-17 08:18:14}, priority = {2}, title = {Propagation and Source Energy Spectra of Cosmic-Ray Nuclei at High Energies}, url = {http://arxiv.org/abs/0810.2972}, year = {2008} }

TY - JOUR ID - citeulike:3423544 L3 - citeulike-article-id:3423544 N2 - A recent measurement of the TRACER instrument on long-duration balloon has determined the individual energy spectra of the major primary cosmic-ray nuclei from oxygen (Z=8) to iron (Z=26). The measurements cover a large range of energies and extend to energies beyond 10^14 eV. We investigate if the data set can be described by a simple but plausible model for acceleration and propagation of cosmic rays. The model assumes a power-law energy spectrum at the source with a common spectral index alpha for all nuclear species, and an energy dependent propagation pathlength (Lambda proportional to E^-0.6) combined with an energy-independent residual pathlength Lambda_0. We find that the data can be fit with a fairly soft source spectrum alpha=2.3-2.4), and with a residual pathlength Lambda_0 as high as 0.3 g cm^-2. We discuss this model in the context of other pertinent information, and we determine the relative abundances of the elements at the cosmic-ray source. TI - Propagation and Source Energy Spectra of Cosmic-Ray Nuclei at High Energies KW - composition KW - cr KW - propagation AU - Ave, M AU - Boyle, PJ AU - Hoeppner, C AU - Marshall, J AU - Muller, D PY - 2008/Oct/16/ UR - http://arxiv.org/abs/0810.2972 ER -