Properties of Cosmic Helium Isotopes Measured by the Alpha Magnetic Spectrometer
Zhuang HL; Martin T; Schmidt SM; Galaktionov Y; Di Felice V; Pauluzzi M; Lebedev A; de Boer W; Yi H; Sagdeev R; Boschini MJ; Laurenti G; Plyaskin V; Zhang C; Arruda L; von Doetinchem P; Fisher P; Light C; Wang LQ; Chen GM; Lyu SS; Ting SCC; Behlmann M; Li ZH; Lippert T; Shan BS; Rozhkov A; Ni JQ; Lazzizzera I; Capell M; Burger WJ; Bourquin M; Bueno EF; Marin J; Luebelsmeyer K; Shi JY; Gast H; Wei J; Gargiulo C; Zhang JH; Han KC; Derome L; Yu YJ; Coignet G; Solano C; Zuccon P; Wang X; Menchaca-Rocha A; Schael S; Goy C; Zhao F; Mott P; Burger J; Li Q; Tang XW; Lee SC; Berdugo J; Consolandi C; Della Torre S; Xu W; Poluianov S; Li TX; Urban T; He ZH; Zannoni M; Khiali B; Egorov A; Chen Y; Aguilar M; Machate F; Luo JZ; Lu YS; Vagelli V; La Vacca G; Ting SM; Garcia-Lopez RJ; Li JQ; Valtonen E; Velasco M; Cervelli F; Fiandrini E; Qi XM; Wang XQ; Gervasi M; Palmonari F; Usoskin I; Acosta MV; von Dratzig AS; Qin X; Choutko V; Dong F; Vecchi M; Yu ZQ; Lu SQ; Torsti J; Luo X; Chou HY; Delgado C; Beischer B; Phan HD; Martinez G; Wang ZX; Kulemzin A; Casaus J; Kanishev K; Mussolin L; Lin CH; Donnini F; Grandi D; Pashnin A; Chen HS; Clark C; Zheng ZM; Valente E; Ambrosi G; Hsieh TH; Jia Y; Zhukov V; Di Falco S; Wang QL; Cui Z; Tuysuz C; Paniccia M; Haino S; Contin A; Orcinha M; Dimiccoli F; Gomez-Coral DM; Molero M; Diaz C; Sun ZT; Guo KH; Becker U; Luo F; Poireau V; Gebauer I; Palermo M; Huang ZC; Bindi V; Graziani M; Bachlechner A; Masi N; Vainio R; Conde AR; Xiong RQ; Mo DC; Rosier-Lees S; Weng ZL; Koutsenko V; Liu Z; Gong J; Duranti M; Konyushikhin M; Tacconi M; Nozzoli F; Eline A; Borgia B; Tian J; Tomassetti N; Attig N; Mana C; Zeissler S; Rancoita PG; Corti C; Kounina O; Lee HT; Oliva A; Qu ZY; Seo ES; Bartoloni A; Demirkoz MB; Zhang Z; Rozza D; Jinchi H; Meng Q; Gamez C; Vialle JP; Wang NH; Nikonov N; Grabski V; Bertucci B; Yang Y; Barrau A; Siedenburg T; Zimmermann N; Bollweg K; Kirn T; Castellini G; Kounine A; Formato V; Datta A; Maurin D; Schwering G; Chang YH; Cheng L; Quadrani L; Dai YM; Kim GN; Barao F; Wu H; Feng J; Rapin D; Basegmez-du Pree S; Huang H; Incagli M; Pensotti S; Giovacchini F; Yan Q; Tang ZC; Zhang F; Cavasonza LA; Cai XD; Laudi E; Jang WY; Barrin L; Chung CH; Zichichi A; Nelson T; Dadzie K; Song JW; Caroff S; Battiston R; Popkow A
Properties of Cosmic Helium Isotopes Measured by the Alpha Magnetic Spectrometer
AMER PHYSICAL SOC
Julkaisun pysyvä osoite on:
https://urn.fi/URN:NBN:fi-fe2021042822873
https://urn.fi/URN:NBN:fi-fe2021042822873
Tiivistelmä
Precision measurements by the Alpha Magnetic Spectrometer (AMS) on the International Space Station of He-3 and He-4 fluxes are presented. The measurements are based on 100 million He-4 nuclei in the rigidity range from 2.1 to 21 GV and 18 million He-3 from 1.9 to 15 GV collected from May 2011 to November 2017. We observed that the He-3 and He-4 fluxes exhibit nearly identical variations with time. The relative magnitude of the variations decreases with increasing rigidity. The rigidity dependence of the He-3/He-4 flux ratio is measured for the first time. Below 4 GV, the He-3/He-4 flux ratio was found to have a significant long-term time dependence. Above 4 GV, the He-3/He-4 flux ratio was found to be time independent, and its rigidity dependence is well described by a single power law proportional to R-Delta with Delta = 0.294 0.004. Unexpectedly, this value is in agreement with the B/O and B/C spectral indices at high energies.
Kokoelmat
- Rinnakkaistallenteet [19207]