Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer

Aguilar, M.; Alpat, B.; Ambrosi, G.; Anderson, H.; Arruda, L.; Attig, N.; Bagwell, C.; Barao, F.; Barbanera, M.; Barrin, L.; Bartoloni, A.; Battiston, R.; Bayyari, A.; Belyaev, N.; Bertucci, B.; Bindi, V.; Bollweg, K.; Bolster, J.; Borchiellini, M.; Borgia, B.; Boschini, M.J.; Bourquin, M.; Brugnoni, C.; Burger, J.; Burger, W.J.; Cai, X.D.; Capell, M.; Casaus, J.; Castellini, G.; Cervelli, F.; Chang, Y.H.; Chen, G.M.; Chen, G.R.; Chen, H.; Chen, H.S.; Chen, Y.; Cheng, L.; Chou, H.Y.; Chouridou, S.; Choutko, V.; Chung, C.H.; Clark, C.; Coignet, G.; Consolandi, C.; Contin, A.; Corti, C.; Cui, Z.; Dadzie, K.; D'Angelo, F.; Dass, A.; Delgado, C.; Della Torre, S.; Demirköz, MELAHAT; Derome, L.; Di Falco, S.; Di Felice, V.; Díaz, C.; Dimiccoli, F.; Von Doetinchem, P.; Dong, F.; Donnini, F.; Duranti, M.; Egorov, A.; Eline, A.; Faldi, F.; Fehr, D.; Feng, J.; Fiandrini, E.; Fisher, P.; Formato, V.; Gámez, C.; García-López, R.J.; Gargiulo, C.; Gast, H.; Gervasi, M.; Giovacchini, F.; Gómez-Coral, D.M.; Gong, J.; Grandi, D.; Graziani, M.; Guracho, A.N.; Haino, S.; Han, K.C.; Hashmani, R.K.; He, Z.H.; Heber, B.; Hsieh, T.H.; Hu, J.Y.; Huang, B.W.; Ionica, M.; Incagli, M.; Jia, Yi; Jinchi, H.; Karagöz, GÜLCE; Khan, S.; Khiali, B.; Kirn, Th.; Klipfel, A.P.; Kounina, O.; Kounine, A.; Koutsenko, V.; Krasnopevtsev, D.; Kuhlman, A.; Kulemzin, A.; La Vacca, G.; Laudi, E.; Laurenti, G.; Lavecchia, G.; Lazzizzera, I.; Lee, H.T.; Lee, S.C.; Li, H.L.; Li, J.Q.; Li, M.; Li, M.; Li, Q.; Li, Q.; Li, Q.Y.; Li, S.; Li, S.L.; Li, J.H.; Li, Z.H.; Liang, M.J.; Liao, P.; Lin, C.H.; Lippert, T.; Liu, J.H.; Liu, P.C.; Lu, S.Q.; Lu, Y.S.; Luebelsmeyer, K.; Luo, J.Z.; Luo, Q.; Luo, S.D.; Luo, Xi; Mañá, C.; Marín, J.; Marquardt, J.; Martínez, G.; Masi, N.; Maurin, D.; Medvedeva, T.; Menchaca-Rocha, A.; Meng, Q.; Mikhailov, V.V.; Molero, M.; Mott, P.; Mussolin, L.; Jozani, Y.; Nicolaidis, R.; Nikonov, N.; Nozzoli, F.; Ocampo-Peleteiro, J.; Oliva, A.; Orcinha, M.; Palmonari, F.; Paniccia, M.; Pashnin, A.; Pauluzzi, M.; Pensotti, S.; Pietzcker, P.; Plyaskin, V.; Poluianov, S.; Pridöhl, D.; Qu, Z.Y.; Quadrani, L.; Rancoita, P.G.; Rapin, D.; Conde, A.; Robyn, E.; Rodríguez-García, I.; Romaneehsen, L.; Rossi, F.; Rozhkov, A.; Rozza, D.; Sagdeev, R.; Savin, E.; Schael, S.; Schultz Von Dratzig, A.; Schwering, G.; Seo, E.S.; Shan, B.S.; Shukla, A.; Siedenburg, T.; Silvestre, G.; Song, J.W.; Song, X.J.; Sonnabend, R.; Strigari, L.; Su, T.; Sun, Q.; Sun, Z.T.; Tabarroni, L.; Tacconi, M.; Tang, Z.C.; Tian, J.; Tian, Y.; Ting, Samuel; Ting, S.M.; Tomassetti, N.; Torsti, J.; Urban, T.; Usoskin, I.; Vagelli, V.; Vainio, R.; Valencia-Otero, M.; Valente, E.; Valtonen, E.; Vázquez Acosta, M.; Vecchi, M.; Velasco, M.; Wang, C.X.; Wang, L.; Wang, L.Q.; Wang, N.H.; Wang, Q.L.; Wang, S.; Wang, X.; Wang, Z.M.; Wei, J.; Weng, Z.L.; Wu, H.; Wu, Y.; Wu, Z.B.; Xiao, J.N.; Xiong, R.Q.; Xiong, X.Z.; Xu, W.; Yan, Q.; Yang, H.T.; Yang, Y.; Yelland, A.; Yi, H.; You, Y.H.; Yu, Y.M.; Yu, Z.Q.; Zhang, C.; Zhang, F.Z.; Zhang, J.; Zhang, J.H.; Zhang, Z.; Zhao, P.W.; Zheng, C.; Zheng, Z.M.; Zhuang, H.L.; Zhukov, V.; Zichichi, A.; Zuccon, P.

doi:10.1103/physrevlett.132.261001

Properties of Cosmic Deuterons Measured by the Alpha Magnetic Spectrometer

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Aguilar M., Alpat B., Ambrosi G., Anderson H., Arruda L., Attig N., ...More

PHYSICAL REVIEW LETTERS, vol.132, no.26, 2024 (SCI-Expanded)

Publication Type: Article / Article
Volume: 132 Issue: 26
Publication Date: 2024
Doi Number: 10.1103/physrevlett.132.261001
Journal Name: PHYSICAL REVIEW LETTERS
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Compendex, INSPEC, zbMATH, DIALNET, Nature Index
Middle East Technical University Affiliated: Yes

Abstract

Precision measurements by the Alpha Magnetic Spectrometer (AMS) on the International Space Station of the deuteron (D) flux are presented. The measurements are based on 21 x 10(6) D nuclei in the rigidity range from 1.9 to 21 GV collected from May 2011 to April 2021. We observe that over the entire rigidity range the D flux exhibits nearly identical time variations with the p, He-3, and He-4 fluxes. Above 4.5 GV, the D/He-4 flux ratio is time independent and its rigidity dependence is well described by a single power law proportional to R-Delta with Delta(D/4He) = -0.108 +/- 0.005. This is in contrast with the He-3/He-4 flux ratio for which we find Delta(3He/4He) = -0.289 +/- 0.003. Above similar to 13 GV we find a nearly identical rigidity dependence of the D and p fluxes with a D/p flux ratio of 0.027 +/- 0.001. These unexpected observations indicate that cosmic deuterons have a sizable primarylike component. With a method independent of cosmic ray propagation, we obtain the primary component of the D flux equal to 9.4 +/- 0.5% of the He-4 flux and the secondary component of the D flux equal to 58 +/- 5% of the He-3 flux.