AMS Observations of Light Cosmic Ray Isotopes and Implications for their Production in the Galaxy

Дата и время публикации : 2012-03-27T23:34:29Z

Авторы публикации и институты :
N. Tomassetti

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: 5 pages, 3 figures, Proceedings of the 13th ICATPP Conference
Первичная категория: astro-ph.HE

Все категории : astro-ph.HE, hep-ex

Краткий обзор статьи: Observations of light isotopes in cosmic rays provide information on their origin and propagation in the Galaxy. Using the data collected by AMS-01 in the STS- 91 space mission, we compare the measurements on 1H, 2H, 3He and 4He with calculations for interstellar propagation and solar modulation. These data are described well by a diffusive-reacceleration model with parameters that match the B/C ratio data. Close comparisons are made within the astrophysical con- straints provided by the B/C data and within the nuclear uncertainties arising from the production cross sections. Astrophysical uncertainties are expected to be dramatically reduced by future data, but nuclear uncertainties may rep- resent a serious limitation of the model predictions. A diagnostic test for the reliability of the models is given by ratios such as 2H/3He, 6Li/7Li or 10B/11B.

Category: Physics