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

Net ionization and net capture cross-section calculations are presented forproton collisions from methane molecules and the DNA/RNA nucleobases adenine,cytosine, guanine, thymine, and uracil. We use the recently introducedindependent-atom-model pixel counting method to calculate these cross sectionsin the 10 keV to 10 MeV impact energy range and compare them with resultsobtained from the simpler additivity rule, a previously usedcomplete-neglect-of-differential-overlap method, and with experimental data andprevious calculations where available. It is found that all theoretical resultsagree reasonably well at high energies, but deviate significantly in thelow-to-intermediate energy range. In particular, the pixel counting methodwhich takes the geometrical overlap of atomic cross sections into account isthe only calculation that is able to describe the measurements for capture inproton-methane collisions down to 10 keV impact energy. For the nucleobases italso yields a significantly smaller cross section in this region than the othermodels. New measurements are urgently required to test this prediction.

the european physical journal. d, atomic, molecular and optical physics/the european physical journal. d, atomic, molecular, optical and plasma physics

Electron capture and ionization cross-section calculations for proton collisions from methane and the DNA and RNA nucleobases