Galactic Cosmic Rays, Cosmic-Ray Variations, and Cosmogenic Nuclides in Meteorites

Leya, Ingo; Hirtz, Jason; David, Jean-Christophe (2021). Galactic Cosmic Rays, Cosmic-Ray Variations, and Cosmogenic Nuclides in Meteorites. Astrophysical journal, 910(2), p. 136. Institute of Physics Publishing IOP 10.3847/1538-4357/abe52f

Preview

Text Galactic_Cosmic_Rays__Cosmic-Ray_Variations__and_Cosmogenic_Nuclides_in_Meteorites_-_pdf.pdf - Published Version Available under License Publisher holds Copyright. Download (12MB) | Preview

We present a new generation of model calculations for cosmogenic production rates in various types of solar system bodies. The model is based on the spectra for primary and secondary particles calculated using the INCL+ +6 code, which is the most reliable and most sophisticated code available for spallation reactions. Thanks to the recent improvements (extending the code to lower and higher energies and considering light charged particles as ejectiles and projectiles), we can for the first time directly consider primary and secondary Galactic α particles. We calculate production rates for 22 Na, 10 Be, and 26 Al in an L-chondrite with a radius of 45 cm and in the Apollo 15 drill core, and we determine the long-term average Galactic cosmic-ray (GCR) spectrum (represented by the solar modulation potential Φ) in the meteoroid orbits at ∼3 au of Φ = 600 MV and at 1 au, i.e., for Earth and Moon of Φ = 660 MV. From this, we calculate a long-term average GCR gradient in the inner solar system of ∼5% au−1. Finally, we discuss the possibility of studying temporal GCR variations and meteoroid orbits using production rate
ratios of short- and long-lived radionuclides.

Interest & Impact

Downloads

49 since deposited on 28 Mar 2022
13 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item