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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Heavy ion collisions in the Fermi energy regime may simultaneously showfeatures of direct and dissipative processes. To investigate this behavior indetail, we study isotope and velocity distributions of projectile-likefragments in the reactions $^{18}$O (35 $A\cdot$MeV) + $^9$Be($^{181}$Ta) atforward angles. We decompose the experimental velocity distributionsempirically into two contributions: a direct, `breakup' component centered atbeam velocity and a dissipative component at lower velocities leading to a tailof the velocity distributions. The direct component is interpreted in theGoldhaber model, and the widths of the velocity distributions are extracted.The dissipative component is then successfully described by transportcalculations. The ratio of the yields of the direct and the dissipativecontributions can be understood from the behavior of the deflection functions.The isotope distributions of the dissipative component agree qualitatively withthe data, but the modification due to secondary de-excitation needs to beconsidered. We conclude, that such reactions are of interest to study theequilibration mechanism in heavy ion collisions.

Competition of breakup and dissipative processes in peripheral collisions at Fermi energies