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Title	Observation of New Properties of Secondary Cosmic Rays Lithium, Beryllium, and Boron by the Alpha Magnetic Spectrometer on the International Space Station
Author(s)	Aguilar, M (Madrid, CIEMAT) ; Ali Cavasonza, L (IAS, Julich ; JCHP, Julich) ; Ambrosi, G (INFN, Perugia) ; Arruda, L (LIP, Lisbon) ; Attig, N (IAS, Julich ; JCHP, Julich) ; Aupetit, S (LPSC, Grenoble) ; Azzarello, P (Geneva U.) ; Bachlechner, A (IAS, Julich ; JCHP, Julich) ; Barao, F (LIP, Lisbon) ; Barrau, A (LPSC, Grenoble) ; Barrin, L (CERN) ; Bartoloni, A (INFN, Rome) ; Basara, L (TIFPA-INFN, Trento) ; Başeğmez-du Pree, S (Beijing, Inst. High Energy Phys.) ; Battarbee, M (Turku U.) ; Battiston, R (TIFPA-INFN, Trento ; Trento U.) ; Becker, U (MIT) ; Behlmann, M (MIT) ; Beischer, B (IAS, Julich ; JCHP, Julich) ; Berdugo, J (Madrid, CIEMAT) ; Bertucci, B (INFN, Perugia ; Perugia U.) ; Bindel, K  F (KIT, Karlsruhe, TTP) ; Bindi, V (Hawaii U.) ; de Boer, W (KIT, Karlsruhe, TTP) ; Bollweg, K (NASA, Houston) ; Bonnivard, V (LPSC, Grenoble) ; Borgia, B (INFN, Rome ; Rome U.) ; Boschini, M  J (INFN, Milan Bicocca) ; Bourquin, M (Geneva U.) ; Bueno, E  F (Sao Paulo U., Sao Carlos) ; Burger, J (MIT) ; Burger, W  J (TIFPA-INFN, Trento) ; Cadoux, F (Geneva U.) ; Cai, X  D (MIT) ; Capell, M (MIT) ; Caroff, S (Annecy, LAPP) ; Casaus, J (Madrid, CIEMAT) ; Castellini, G (INOA, Florence) ; Cervelli, F (INFN, Pisa) ; Chae, M  J (Ewha Women's U., Seoul) ; Chang, Y  H (Taiwan, Natl. Central U.) ; Chen, A  I (MIT) ; Chen, G  M (Beijing, Inst. High Energy Phys.) ; Chen, H  S (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Cheng, L (Shandong U.) ; Chou, H  Y (Taiwan, Natl. Central U.) ; Choumilov, E (MIT) ; Choutko, V (MIT) ; Chung, C  H (IAS, Julich ; JCHP, Julich) ; Clark, C (NASA, Houston) ; Clavero, R (Laguna U., Tenerife ; IAC, La Laguna) ; Coignet, G (Annecy, LAPP) ; Consolandi, C (Hawaii U.) ; Contin, A (INFN, Bologna ; U. Bologna (main)) ; Corti, C (Hawaii U.) ; Creus, W (Taiwan, Inst. Phys.) ; Crispoltoni, M (INFN, Perugia ; Perugia U.) ; Cui, Z (Shandong U.) ; Dadzie, K (MIT) ; Dai, Y  M (Inst. Electr. Engin., Beijing) ; Datta, A (Hawaii U.) ; Delgado, C (Madrid, CIEMAT) ; Della Torre, S (INFN, Milan Bicocca) ; Demirköz, M  B (Middle East Tech. U., Ankara) ; Derome, L (LPSC, Grenoble) ; Di Falco, S (INFN, Pisa) ; Dimiccoli, F (TIFPA-INFN, Trento ; Trento U.) ; Díaz, C (Madrid, CIEMAT) ; von Doetinchem, P (Hawaii U.) ; Dong, F (Southeast U., Nanjing) ; Donnini, F (INFN, Perugia ; Perugia U.) ; Duranti, M (INFN, Perugia) ; D'Urso, D (INFN, Perugia) ; Egorov, A (MIT) ; Eline, A (MIT) ; Eronen, T (Turku U.) ; Feng, J (MIT) ; Fiandrini, E (INFN, Perugia ; Perugia U.) ; Fisher, P (MIT) ; Formato, V (INFN, Perugia) ; Galaktionov, Y (MIT) ; Gallucci, G (INFN, Pisa) ; García-López, R  J (Laguna U., Tenerife ; IAC, La Laguna) ; Gargiulo, C (CERN) ; Gast, H (IAS, Julich ; JCHP, Julich) ; Gebauer, I (KIT, Karlsruhe, TTP) ; Gervasi, M (INFN, Milan Bicocca ; Milan Bicocca U.) ; Ghelfi, A (LPSC, Grenoble) ; Giovacchini, F (Madrid, CIEMAT) ; Gómez-Coral, D  M (Mexico U.) ; Gong, J (Southeast U., Nanjing) ; Goy, C (Annecy, LAPP) ; Grabski, V (Mexico U.) ; Grandi, D (INFN, Milan Bicocca) ; Graziani, M (KIT, Karlsruhe, TTP) ; Guo, K  H (SYSU, Guangzhou) ; Haino, S (Taiwan, Inst. Phys.) ; Han, K  C (CSIST, Taiwan) ; He, Z  H (SYSU, Guangzhou) ; Heil, M (MIT) ; Hsieh, T  H (MIT) ; Huang, H (Taiwan, Inst. Phys.) ; Huang, Z  C (SYSU, Guangzhou) ; Huh, C (CHEP, Taegu) ; Incagli, M (INFN, Pisa) ; Ionica, M (INFN, Perugia) ; Jang, W  Y (CHEP, Taegu) ; Jia, Yi (MIT) ; Jinchi, H (CSIST, Taiwan) ; Kang, S  C (CHEP, Taegu) ; Kanishev, K (TIFPA-INFN, Trento ; CERN) ; Khiali, B (Taiwan, Natl. Central U.) ; Kim, G  N (CHEP, Taegu) ; Kim, K  S (CHEP, Taegu) ; Kirn, Th (IAS, Julich ; JCHP, Julich) ; Konak, C (Middle East Tech. U., Ankara) ; Kounina, O (MIT) ; Kounine, A (MIT) ; Koutsenko, V (MIT) ; Kulemzin, A (MIT) ; La Vacca, G (INFN, Milan Bicocca ; Milan Bicocca U.) ; Laudi, E (CERN) ; Laurenti, G (INFN, Bologna) ; Lazzizzera, I (TIFPA-INFN, Trento ; Trento U.) ; Lebedev, A (MIT) ; Lee, H  T (Taipei, Computing Ctr.) ; Lee, S  C (Taiwan, Inst. Phys.) ; Leluc, C (Geneva U.) ; Li, H  S (Taiwan, Natl. Cheng Kung U.) ; Li, J  Q (Southeast U., Nanjing) ; Li, Q (Southeast U., Nanjing) ; Li, T  X (SYSU, Guangzhou) ; Li, Y (Geneva U.) ; Li, Z  H (Beijing, Inst. High Energy Phys.) ; Li, Z  Y (Taiwan, Inst. Phys.) ; Lim, S (CHEP, Taegu) ; Lin, C  H (Taiwan, Inst. Phys.) ; Lipari, P (INFN, Rome) ; Lippert, T (IAS, Julich ; JCHP, Julich) ; Liu, D (Taiwan, Natl. Central U.) ; Liu, Hu (MIT) ; Lordello, V  D (Sao Paulo U., Sao Carlos) ; Lu, S  Q (Taiwan, Inst. Phys.) ; Lu, Y  S (Beijing, Inst. High Energy Phys.) ; Luebelsmeyer, K (IAS, Julich ; JCHP, Julich) ; Luo, F (Shandong U.) ; Luo, J  Z (Southeast U., Nanjing) ; Lyu, S  S (SYSU, Guangzhou) ; Machate, F (IAS, Julich ; JCHP, Julich) ; Mañá, C (Madrid, CIEMAT) ; Marín, J (Madrid, CIEMAT) ; Martin, T (NASA, Houston) ; Martínez, G (Madrid, CIEMAT) ; Masi, N (INFN, Bologna) ; Maurin, D (LPSC, Grenoble) ; Menchaca-Rocha, A (Mexico U.) ; Meng, Q (Southeast U., Nanjing) ; Mikuni, V  M (Sao Paulo U., Sao Carlos) ; Mo, D  C (SYSU, Guangzhou) ; Mott, P (NASA, Houston) ; Nelson, T (Hawaii U.) ; Ni, J  Q (SYSU, Guangzhou) ; Nikonov, N (IAS, Julich ; JCHP, Julich) ; Nozzoli, F (INFN, Perugia) ; Oliva, A (Madrid, CIEMAT) ; Orcinha, M (LIP, Lisbon) ; Palermo, M (Hawaii U.) ; Palmonari, F (INFN, Bologna ; U. Bologna (main)) ; Palomares, C (Madrid, CIEMAT) ; Paniccia, M (Geneva U.) ; Pauluzzi, M (INFN, Perugia ; Perugia U.) ; Pensotti, S (INFN, Milan Bicocca ; Milan Bicocca U.) ; Perrina, C (Geneva U.) ; Phan, H  D (MIT) ; Picot-Clemente, N (Maryland U.) ; Pilo, F (INFN, Pisa) ; Pizzolotto, C (INFN, Perugia) ; Plyaskin, V (MIT) ; Pohl, M (Geneva U.) ; Poireau, V (Annecy, LAPP) ; Quadrani, L (INFN, Bologna ; U. Bologna (main)) ; Qi, X  M (SYSU, Guangzhou) ; Qin, X (MIT) ; Qu, Z  Y (Taiwan, Inst. Phys.) ; Räihä, T (IAS, Julich ; JCHP, Julich) ; Rancoita, P  G (INFN, Milan Bicocca) ; Rapin, D (Geneva U.) ; Ricol, J  S (LPSC, Grenoble) ; Rosier-Lees, S (Annecy, LAPP) ; Rozhkov, A (MIT) ; Rozza, D (INFN, Milan Bicocca ; Milan Bicocca U.) ; Sagdeev, R (Maryland U.) ; Schael, S (IAS, Julich ; JCHP, Julich) ; Schmidt, S  M (IAS, Julich ; JCHP, Julich) ; Schulz von Dratzig, A (IAS, Julich ; JCHP, Julich) ; Schwering, G (IAS, Julich ; JCHP, Julich) ; Seo, E  S (Maryland U.) ; Shan, B  S (Beihang U.) ; Shi, J  Y (Southeast U., Nanjing) ; Siedenburg, T (IAS, Julich ; JCHP, Julich) ; Son, D (CHEP, Taegu) ; Song, J  W (Shandong U.) ; Tacconi, M (INFN, Milan Bicocca ; Milan Bicocca U.) ; Tang, X  W (Beijing, Inst. High Energy Phys.) ; Tang, Z  C (Beijing, Inst. High Energy Phys.) ; Tescaro, D (Laguna U., Tenerife ; IAC, La Laguna) ; Ting, Samuel C  C (MIT ; CERN) ; Ting, S  M (MIT) ; Tomassetti, N (INFN, Perugia ; Perugia U.) ; Torsti, J (Turku U.) ; Türkoğlu, C (Middle East Tech. U., Ankara) ; Urban, T (NASA, Houston) ; Vagelli, V (INFN, Perugia ; Perugia U.) ; Valente, E (INFN, Rome ; Rome U.) ; Valtonen, E (Turku U.) ; Vázquez Acosta, M (Laguna U., Tenerife ; IAC, La Laguna) ; Vecchi, M (Sao Paulo U., Sao Carlos) ; Velasco, M (Madrid, CIEMAT) ; Vialle, J  P (Annecy, LAPP) ; Vitale, V (TIFPA-INFN, Trento) ; Wang, L  Q (Shandong U.) ; Wang, N  H (Shandong U.) ; Wang, Q  L (Inst. Electr. Engin., Beijing) ; Wang, X (MIT) ; Wang, X  Q (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Wang, Z  X (SYSU, Guangzhou) ; Wei, C  C (Taiwan, Inst. Phys.) ; Weng, Z  L (MIT) ; Whitman, K (Hawaii U.) ; Wu, H (Southeast U., Nanjing) ; Wu, X (Geneva U.) ; Xiong, R  Q (Southeast U., Nanjing) ; Xu, W (MIT) ; Yan, Q (MIT) ; Yang, J (Ewha Women's U., Seoul) ; Yang, M (Beijing, Inst. High Energy Phys.) ; Yang, Y (Taiwan, Natl. Cheng Kung U.) ; Yi, H (Southeast U., Nanjing) ; Yu, Y  J (Inst. Electr. Engin., Beijing) ; Yu, Z  Q (Beijing, Inst. High Energy Phys.) ; Zannoni, M (INFN, Milan Bicocca ; Milan Bicocca U.) ; Zeissler, S (KIT, Karlsruhe, TTP) ; Zhang, C (Beijing, Inst. High Energy Phys.) ; Zhang, F (Beijing, Inst. High Energy Phys.) ; Zhang, J (MIT) ; Zhang, J  H (Southeast U., Nanjing) ; Zhang, S  W (Beijing, Inst. High Energy Phys. ; Beijing, GUCAS) ; Zhang, Z (MIT) ; Zheng, Z  M (Beihang U.) ; Zhuang, H  L (Beijing, Inst. High Energy Phys.) ; Zhukov, V (IAS, Julich ; JCHP, Julich) ; Zichichi, A (INFN, Bologna ; U. Bologna (main)) ; Zimmermann, N (IAS, Julich ; JCHP, Julich) ; Zuccon, P (MIT)
Collaboration	AMS
Publication	2018
Number of pages	8
In:	Phys. Rev. Lett. 120 (2018) 021101
DOI	10.1103/PhysRevLett.120.021101
Subject category	Astrophysics and Astronomy
Accelerator/Facility, Experiment	AMS
Abstract	We report on the observation of new properties of secondary cosmic rays Li, Be, and B measured in the rigidity (momentum per unit charge) range 1.9 GV to 3.3 TV with a total of $5.4 \times 10^6$ nuclei collected by AMS during the first five years of operation aboard the International Space Station. The Li and B fluxes have an identical rigidity dependence above 7 GV and all three fluxes have an identical rigidity dependence above 30 GV with the Li/Be flux ratio of $2.0 \pm 0.1$. The three fluxes deviate from a single power law above 200 GV in an identical way. This behavior of secondary cosmic rays has also been observed in the AMS measurement of primary cosmic rays He, C, and O but the rigidity dependences of primary cosmic rays and of secondary cosmic rays are distinctly different. In particular, above 200 GV, the secondary cosmic rays harden more than the primary cosmic rays.
Copyright/License	publication: © 2018 The Authors (License: CC-BY-4.0)

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