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

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

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

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
Open Archive Collection: AVESIS Open Access Collection
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.