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Contribution from close and distant collisions to K-shell excitation in Ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$
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 facto...
| Autores principales: | , , , , , , , , , , |
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| Lenguaje: | eng |
| Publicado: |
1982
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| Materias: | |
| Acceso en línea: | https://dx.doi.org/10.1103/PhysRevA.25.1334 http://cds.cern.ch/record/904239 |
| _version_ | 1780908754771902464 |
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| author | 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 |
| author_facet | 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 |
| author_sort | Bak, J F |
| collection | CERN |
| description | 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. |
| id | cern-904239 |
| institution | Organización Europea para la Investigación Nuclear |
| language | eng |
| publishDate | 1982 |
| record_format | invenio |
| spelling | cern-9042392019-09-30T06:29:59Zdoi:10.1103/PhysRevA.25.1334http://cds.cern.ch/record/904239engBak, J FForster, J SJensen, P RMadsboll, HMelchart, GerhardMøller, S PPetersen, GRegall, RSchiøtt, Hans ESiffert, PUggerhøj, ErikContribution from close and distant collisions to K-shell excitation in Ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$Other Fields of PhysicsFor 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.oai:cds.cern.ch:9042391982 |
| spellingShingle | Other Fields of Physics 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 Contribution from close and distant collisions to K-shell excitation in Ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$ |
| title | Contribution from close and distant collisions to K-shell excitation in Ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$ |
| title_full | Contribution from close and distant collisions to K-shell excitation in Ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$ |
| title_fullStr | Contribution from close and distant collisions to K-shell excitation in Ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$ |
| title_full_unstemmed | Contribution from close and distant collisions to K-shell excitation in Ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$ |
| title_short | Contribution from close and distant collisions to K-shell excitation in Ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$ |
| title_sort | contribution from close and distant collisions to k-shell excitation in ge measured using the channeling technique for relativistic protons, $\pi^{+}$, and $\pi^{-}$ |
| topic | Other Fields of Physics |
| url | https://dx.doi.org/10.1103/PhysRevA.25.1334 http://cds.cern.ch/record/904239 |
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