| Article | |
| Title | Contribution from close and distant collisions to K-shell excitation in Ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$ |
| Author(s) | Bak, J F ; Forster, J S ; Jensen, P R ; Madsboll, H ; Melchart, Gerhard ; Møller, S P ; Petersen, G ; Regall, R ; Schiøtt, Hans E ; Siffert, P ; Uggerhøj, Erik |
| Affiliation | (CERN) |
| Publication | 1982 |
| In: | Phys. Rev. A 25 (1982) 1334-44 |
| DOI | 10.1103/PhysRevA.25.1334 |
| Subject category | Other Fields of Physics |
| Abstract | For the first time, the impact-parameter dependence for K-shell ionization was measured for relativistic projectiles, although in an indirect way. Experimentally, channeling of GeV projectiles was used to gradually exclude close-encounter processes. In the present experiment, the Lorentz gamma factor varied between approximately 2 and approximately 100; in this region, the contribution from distant collisions becomes increasingly important and amounts to about 50% of the total yield for gamma approximately 100. The experimental data are compared to theoretical calculations of impact-parameter distributions, and the agreement is fair for both positive and negative particles. |
Corresponding record in: Inspire
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