Properties of Cosmic Lithium Isotopes Measured by the Alpha Magnetic Spectrometer

Aguilar, M.; 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.; Burzillà, N.; 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.; Duranti, M.; Egorov, A.; Eline, A.; Faldi, F.; Fehr, D.; Feng, J.; Fiandrini, E.; Fisher, P.; Formato, V.; García-López, R.J.; Gargiulo, C.; Gast, H.; Gervasi, M.; Giovacchini, F.; Gómez-Coral, D.M.; Gong, J.; Grandi, D.; Graziani, M.; Haino, S.; Han, K.C.; He, Z.H.; Heber, B.; Hernández-Nicolás, F.; Hsieh, T.H.; Hu, J.Y.; Huang, B.W.; Ionica, M.; Incagli, M.; Jia, Yi; Jinchi, H.; Karagöz, GÜLCE; 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.H.; Li, J.Q.; Li, M.; Li, M.; Li, Q.; Li, Q.; Li, Q.Y.; Li, S.L.; Li, Z.H.; Liang, M.J.; Liao, P.; Lin, C.H.; Lippert, T.; Liu, J.H.; Liu, P.C.; Liu, Z.; Lu, S.Q.; 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.; Pelosi, D.; 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.; Schael, S.; Von Dratzig, A.; Schwering, G.; Seo, E.S.; Shan, B.S.; Shukla, A.; Siedenburg, T.; Siemko, A.; 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.; Türk, BERK; Ubaldi, A.; Urban, T.; Usoskin, I.; Vagelli, V.; Vainio, R.; Väisänen, P.; Valencia-Otero, M.; Valente, E.; Valtonen, E.; Vázquez Acosta, M.; Vecchi, M.; Velasco, M.; Wang, C.X.; Wang, J.C.; 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.; 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.; Zuberi, M.; Zuccon, P.

doi:10.1103/physrevlett.134.201001

Properties of Cosmic Lithium Isotopes Measured by the Alpha Magnetic Spectrometer

Aguilar M., Ambrosi G., Anderson H., Arruda L., Attig N., Bagwell C., ...More

PHYSICAL REVIEW LETTERS, vol.134, no.20, 2025 (SCI-Expanded, Scopus)

Publication Type: Article / Article
Volume: 134 Issue: 20
Publication Date: 2025
Doi Number: 10.1103/physrevlett.134.201001
Journal Name: PHYSICAL REVIEW LETTERS
Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC, MathSciNet, zbMATH, DIALNET, Nature Index
Middle East Technical University Affiliated: Yes

Abstract

We present the first measurement of cosmic-ray fluxes of Li-6 and Li-7 isotopes in the rigidity range from 1.9 to 25 GV. The measurements are based on 9.7 x 10(5) 6Li and 1.04 x 10(6) 7Li nuclei collected by the Alpha Magnetic Spectrometer on the International Space Station from May 2011 to October 2023. We observe that over the entire rigidity range the Li-6 and Li-7 fluxes exhibit nearly identical time variations and, above similar to 4 GV, the time variations of Li-6, Li-7, He, Be, B, C, N, and O fluxes are identical. Above similar to 7 GV, we find an identical rigidity dependence of the Li-6 and Li-7 fluxes. This shows that they are both produced by collisions of heavier cosmic-ray nuclei with the interstellar medium and, in particular, excludes the existence of a sizable primary component in the Li-7 flux.