Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station

M. Aguilar; L. Ali Cavasonza; G. Ambrosi; L. Arruda; N. Attig; S. Aupetit; P. Azzarello; A. Bachlechner; F. Barao; A. Barrau; L. Barrin; A. Bartoloni; L. Basara; S. Başeǧmez-Du Pree; M. Battarbee; R. Battiston; U. Becker; M. Behlmann; B. Beischer; J. Berdugo; B. Bertucci; K. F. Bindel; V. Bindi; G. Boella; W. De Boer; K. Bollweg; V. Bonnivard; B. Borgia; M. J. Boschini; M. Bourquin; E. F. Bueno; J. Burger; F. Cadoux; X. D. Cai; M. Capell; S. Caroff; J. Casaus; G. Castellini; F. Cervelli; M. J. Chae; Y. H. Chang; A. I. Chen; G. M. Chen; H. S. Chen; L. Cheng; H. Y. Chou; E. Choumilov; V. Choutko; C. H. Chung; M. Velasco; AMS Collaboration

doi:10.1103/PhysRevLett.117.231102

Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station

M. Aguilar, L. Ali Cavasonza, G. Ambrosi, L. Arruda, N. Attig, S. Aupetit, P. Azzarello, A. Bachlechner, F. Barao, A. Barrau, L. Barrin, A. Bartoloni, L. Basara, S. Başeǧmez-Du Pree, M. Battarbee, R. Battiston, U. Becker, M. Behlmann, B. Beischer, J. BerdugoB. Bertucci, K. F. Bindel, V. Bindi, G. Boella, W. De Boer, K. Bollweg, V. Bonnivard, B. Borgia, M. J. Boschini, M. Bourquin, E. F. Bueno, J. Burger, F. Cadoux, X. D. Cai, M. Capell, S. Caroff, J. Casaus, G. Castellini, F. Cervelli, M. J. Chae, Y. H. Chang, A. I. Chen, G. M. Chen, H. S. Chen, L. Cheng, H. Y. Chou, E. Choumilov, V. Choutko, C. H. Chung, M. Velasco, AMS Collaboration

Physics and Astronomy

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Abstract

Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The detailed variation with rigidity of the B/C spectral index is reported for the first time. The B/C ratio does not show any significant structures in contrast to many cosmic ray models that require such structures at high rigidities. Remarkably, above 65 GV, the B/C ratio is well described by a single power law RΔ with index Δ=-0.333±0.014(fit)±0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts Δ=-1/3 asymptotically.

Original language	English (US)
Article number	231102
Journal	Physical Review Letters
Volume	117
Issue number	23
DOIs	https://doi.org/10.1103/PhysRevLett.117.231102
State	Published - Nov 28 2016

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Physics and Astronomy(all)

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Aguilar, M., Ali Cavasonza, L., Ambrosi, G., Arruda, L., Attig, N., Aupetit, S., Azzarello, P., Bachlechner, A., Barao, F., Barrau, A., Barrin, L., Bartoloni, A., Basara, L., Başeǧmez-Du Pree, S., Battarbee, M., Battiston, R., Becker, U., Behlmann, M., Beischer, B., ... AMS Collaboration (2016). Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station. Physical Review Letters, 117(23), [231102]. https://doi.org/10.1103/PhysRevLett.117.231102

@article{700a679ff65d4916b66270c19aacc6be,

title = "Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station",

abstract = "Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The detailed variation with rigidity of the B/C spectral index is reported for the first time. The B/C ratio does not show any significant structures in contrast to many cosmic ray models that require such structures at high rigidities. Remarkably, above 65 GV, the B/C ratio is well described by a single power law RΔ with index Δ=-0.333±0.014(fit)±0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts Δ=-1/3 asymptotically.",

author = "M. Aguilar and {Ali Cavasonza}, L. and G. Ambrosi and L. Arruda and N. Attig and S. Aupetit and P. Azzarello and A. Bachlechner and F. Barao and A. Barrau and L. Barrin and A. Bartoloni and L. Basara and {Ba{\c s}eǧmez-Du Pree}, S. and M. Battarbee and R. Battiston and U. Becker and M. Behlmann and B. Beischer and J. Berdugo and B. Bertucci and Bindel, {K. F.} and V. Bindi and G. Boella and {De Boer}, W. and K. Bollweg and V. Bonnivard and B. Borgia and Boschini, {M. J.} and M. Bourquin and Bueno, {E. F.} and J. Burger and F. Cadoux and Cai, {X. D.} and M. Capell and S. Caroff and J. Casaus and G. Castellini and F. Cervelli and Chae, {M. J.} and Chang, {Y. H.} and Chen, {A. I.} and Chen, {G. M.} and Chen, {H. S.} and L. Cheng and Chou, {H. Y.} and E. Choumilov and V. Choutko and Chung, {C. H.} and M. Velasco and {AMS Collaboration}",

year = "2016",

month = nov,

day = "28",

doi = "10.1103/PhysRevLett.117.231102",

language = "English (US)",

volume = "117",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "23",

}

Aguilar, M, Ali Cavasonza, L, Ambrosi, G, Arruda, L, Attig, N, Aupetit, S, Azzarello, P, Bachlechner, A, Barao, F, Barrau, A, Barrin, L, Bartoloni, A, Basara, L, Başeǧmez-Du Pree, S, Battarbee, M, Battiston, R, Becker, U, Behlmann, M, Beischer, B, Berdugo, J, Bertucci, B, Bindel, KF, Bindi, V, Boella, G, De Boer, W, Bollweg, K, Bonnivard, V, Borgia, B, Boschini, MJ, Bourquin, M, Bueno, EF, Burger, J, Cadoux, F, Cai, XD, Capell, M, Caroff, S, Casaus, J, Castellini, G, Cervelli, F, Chae, MJ, Chang, YH, Chen, AI, Chen, GM, Chen, HS, Cheng, L, Chou, HY, Choumilov, E, Choutko, V, Chung, CH, Velasco, M & AMS Collaboration 2016, 'Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station', Physical Review Letters, vol. 117, no. 23, 231102. https://doi.org/10.1103/PhysRevLett.117.231102

TY - JOUR

T1 - Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station

AU - Aguilar, M.

AU - Ali Cavasonza, L.

AU - Ambrosi, G.

AU - Arruda, L.

AU - Attig, N.

AU - Aupetit, S.

AU - Azzarello, P.

AU - Bachlechner, A.

AU - Barao, F.

AU - Barrau, A.

AU - Barrin, L.

AU - Bartoloni, A.

AU - Basara, L.

AU - Başeǧmez-Du Pree, S.

AU - Battarbee, M.

AU - Battiston, R.

AU - Becker, U.

AU - Behlmann, M.

AU - Beischer, B.

AU - Berdugo, J.

AU - Bertucci, B.

AU - Bindel, K. F.

AU - Bindi, V.

AU - Boella, G.

AU - De Boer, W.

AU - Bollweg, K.

AU - Bonnivard, V.

AU - Borgia, B.

AU - Boschini, M. J.

AU - Bourquin, M.

AU - Bueno, E. F.

AU - Burger, J.

AU - Cadoux, F.

AU - Cai, X. D.

AU - Capell, M.

AU - Caroff, S.

AU - Casaus, J.

AU - Castellini, G.

AU - Cervelli, F.

AU - Chae, M. J.

AU - Chang, Y. H.

AU - Chen, A. I.

AU - Chen, G. M.

AU - Chen, H. S.

AU - Cheng, L.

AU - Chou, H. Y.

AU - Choumilov, E.

AU - Choutko, V.

AU - Chung, C. H.

AU - Velasco, M.

AU - AMS Collaboration

PY - 2016/11/28

Y1 - 2016/11/28

N2 - Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The detailed variation with rigidity of the B/C spectral index is reported for the first time. The B/C ratio does not show any significant structures in contrast to many cosmic ray models that require such structures at high rigidities. Remarkably, above 65 GV, the B/C ratio is well described by a single power law RΔ with index Δ=-0.333±0.014(fit)±0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts Δ=-1/3 asymptotically.

AB - Knowledge of the rigidity dependence of the boron to carbon flux ratio (B/C) is important in understanding the propagation of cosmic rays. The precise measurement of the B/C ratio from 1.9 GV to 2.6 TV, based on 2.3 million boron and 8.3 million carbon nuclei collected by AMS during the first 5 years of operation, is presented. The detailed variation with rigidity of the B/C spectral index is reported for the first time. The B/C ratio does not show any significant structures in contrast to many cosmic ray models that require such structures at high rigidities. Remarkably, above 65 GV, the B/C ratio is well described by a single power law RΔ with index Δ=-0.333±0.014(fit)±0.005(syst), in good agreement with the Kolmogorov theory of turbulence which predicts Δ=-1/3 asymptotically.

UR - http://www.scopus.com/inward/record.url?scp=85002339058&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85002339058&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.117.231102

DO - 10.1103/PhysRevLett.117.231102

M3 - Article

C2 - 27982618

VL - 117

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 23

M1 - 231102

ER -

Precision Measurement of the Boron to Carbon Flux Ratio in Cosmic Rays from 1.9 GV to 2.6 TV with the Alpha Magnetic Spectrometer on the International Space Station

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