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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

Voyager observations for over 3 years beyond the heliopause have started todefine features of the low energy, less than 100 MeV per nuc, cosmic raysecondary nuclei that have a zero or negligibly small source component. As anexample, the abundance of B between about 7 and 15 MeV per nuc is unexpectedlylarge, greater than the prediction of a LBM by 2 or 3 in the measurement andcross section error. On the other hand, for several other heavier secondarynuclei with a low source abundance such as F and Z equal 17 to 19 and 21 to 23nuclei, in the corresponding energy channels between about 10-20 MeV/nuc, zeronuclei have been observed. The same LBM calculations would predict about 6 to 7events for the sum of these three groups of nuclei. The B observed intensitiescould be more closely matched by considering a nested LBM with 0.3-1.0 g/cm2 ofmatter near the cosmic ray sources, essentially a source component of B. Thisnested LBM calculation, if extended to the production of the above groups ofsecondaries, would however predict a total 8 to 12 events thus leading to aneven larger discrepancy with the zero events that are observed. Themeasurements of heavier secondaries at low energies therefore make it veryproblematical that a nested LBM with more than a few 0.1 g/cm2 or more ofmatter near the sources could be the source of the large B abundance seen byVoyager. The large abundance of B at the lowest energies is best understood, sofar, as the result of production mostly from a matter traversal of 10 g/cm2 inthe galaxy, possibly in combination with uncertainties in the data and crosssections at these low energies.

Observations of the Abundances of Secondary Galactic Cosmic Rays from Z  equals 5 to 28 Between 10 and 200 MeV/nuc Beyond the Heliopause by Voyager,  Some Unexpected Anomalies and Their Interpretation Using a LBM for Galactic  Propagation