| Autor: |
Zettergren H; Department of Physics, Stockholm University, S-106 91 Stockholm, Sweden. henning@fysik.su.se, Rousseau P, Wang Y, Seitz F, Chen T, Gatchell M, Alexander JD, Stockett MH, Rangama J, Chesnel JY, Capron M, Poully JC, Domaracka A, Méry A, Maclot S, Schmidt HT, Adoui L, Alcamí M, Tielens AG, Martín F, Huber BA, Cederquist H |
| Jazyk: |
angličtina |
| Zdroj: |
Physical review letters [Phys Rev Lett] 2013 May 03; Vol. 110 (18), pp. 185501. Date of Electronic Publication: 2013 May 01. |
| DOI: |
10.1103/PhysRevLett.110.185501 |
| Abstrakt: |
We report highly selective covalent bond modifications in collisions between keV alpha particles and van der Waals clusters of C(60) fullerenes. Surprisingly, C(119)(+) and C(118)(+) are the dominant molecular fusion products. We use molecular dynamics simulations to show that C(59)(+) and C(58)(+) ions--effectively produced in prompt knockout processes with He(2+)--react rapidly with C(60) to form dumbbell C(119)(+) and C(118)(+). Ion impact on molecular clusters in general is expected to lead to efficient secondary reactions of interest for astrophysics. These reactions are different from those induced by photons. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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