English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

High-precision data from AMS-02 on Li, Be, and B provide the best constraintson Galactic cosmic-ray transport parameters. We re-evaluate the impact of Fefragmentation on the Li, Be, and B modelling. We discuss the consequences onthe transport parameter determination and reassess whether a primary source ofLi is needed to match AMS-02 data. We renormalised several cross-sectionparametrisations to existing data for the most important reactions producingLi, Be, and B. We used the USINE code with these new cross-section sets tore-analyse Li/C, Be/C, and B/C AMS-02 data. We built three equally plausiblecross-section sets. Compared to the initial cross-section sets, they lead to anaverage enhanced production of Li ($\sim20-50\%$) and Be ($\sim5-15\%$), whileleaving the B flux mostly unchanged. In particular, Fe fragmentation is foundto contribute to up to 10\% of the Li and Be fluxes. Used in the combinedanalysis of AMS-02 Li/C, Be/C, and B/C data, the fit is significantly improved,with an enhanced diffusion coefficient ($\sim 20\%)$. The three updatedcross-section sets are found to either slightly undershoot or overshoot theLi/C and B/C ratios: this strongly disfavours evidence for a primary source ofLi in cosmic rays. We stress that isotopic cosmic-ray ratios of Li (and to alesser extent Be), soon to be released by AMS-02, are also impacted by the useof these updated sets. Almost no nuclear data exist for the production of Liand B isotopes from Ne, Mg, Si, and Fe, whereas these reactions are estimatedto account for $\sim 20\%$ of the total production. New nuclear measurementswould be appreciated and help to better exploit the high-precision AMS-02cosmic-ray data.

The importance of Fe fragmentation for LiBeB analyses: Is a Li primary source needed to explain AMS-02 data?