Speaker
Description
Cosmic ray isotopes carry crucial information about the sources, acceleration, and propagation processes in the galaxy and heliosphere, serving as an important window for observing the universe. Limited by the instrument’s resolution of particle velocity, the current observations of isotopes are primarily focused on the low-energy range (<1 GeV/n) with significant experimental uncertainties. In this work, we propose a new method to estimate the isotopic abundance without using isotope detectors. The underlying physical mechanism is the isotope or A/Z dependence of the solar modulation. By using this method and the precise time-varying elemental flux from AMS, the estimated helium isotope abundance matches well with the AMS observation. Consequently, we have applied this method to other nuclei and derived the isotopic abundances for these species.
