Survival of dipeptides under ionizing radiation in astrophysical environments

Le résumé fourni par la source

the IR absorption spectrum before, during and after the irradiation. The main effect observed is film degradation due to ion-induced fragmentation and sputtering; notably the cyclic species exhibiting higher radioresistance than the linear ones. The measurements at low temperature also provide evidence of the formation of new species of lower masses. Moreover, the similarity between the IR spectra of irradiated alanine and pristine linear alanine-alanine films, suggests ion-induced peptide polymerization and supports the idea that cyclic dipeptides may have survived the harsh conditions of the early universe, contributing to possible radiation-induced pathways leading to larger organic species of potentially prebiotic significance.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.