Publicação
Thickness characterization of thin Silicon Strip Detectors and its impact in Nuclear Physics Experiments
| Resumo: | The identification and precise characterization of nuclear reaction products is crucial for the study and understanding of the interactions that govern physics at the subatomic level. One of the options developed to discriminate different particles with similar energy is the composition of several stage detectors, usually called Telescope Detection Systems. In this work four Single Sided Silicon Stripped detectors with thicknesses of ≈20 µm have been characterized to improve their response as ∆E in Telescope detection systems. The characterization resulted in the precise determination of the detector thickness throughout its surface. Two different methods were applied to achieve this goal. Maximum deviations of up to 35 % were observed. This charactererization will allow for a better resolution of the system and a clearer discrimination of the reaction products. Several steps were undertaken during the analysis. The angular calibration of the setup was performed using the scattering reaction 10Be + 197Au at energies below the Coulomb barrier. The energy calibration of the E stage was performed using radioactive sources and corrected for high energies by applying a gain match procedure that allowed a tighter constrain in the event selection. The energy calibration of the thin detectors, done with low energy nuclear reactions and radioactive sources, had to consider the struggling of particles in the dead layers of the material to correctly determine the energy deposited by incident particles in the active detector layer. The results of this work will allow a more precise analysis of the reaction data on the exotic nucleus 10Be on the magic nucleus 120Sn, measured for the first time at energies around the Coulomb Barrier, at the LNS laboratory in Catania (Italy). |
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| Autores principais: | Barba, Francisco Maria Santos Lima Geraldes |
| Assunto: | Reações nucleares Instrumentação nuclear Detetores de silício Detetores telescópio Teses de mestrado - 2022 |
| Ano: | 2022 |
| País: | Portugal |
| Tipo de documento: | dissertação de mestrado |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade de Lisboa |
| Idioma: | inglês |
| Origem: | Repositório da Universidade de Lisboa |
| Resumo: | The identification and precise characterization of nuclear reaction products is crucial for the study and understanding of the interactions that govern physics at the subatomic level. One of the options developed to discriminate different particles with similar energy is the composition of several stage detectors, usually called Telescope Detection Systems. In this work four Single Sided Silicon Stripped detectors with thicknesses of ≈20 µm have been characterized to improve their response as ∆E in Telescope detection systems. The characterization resulted in the precise determination of the detector thickness throughout its surface. Two different methods were applied to achieve this goal. Maximum deviations of up to 35 % were observed. This charactererization will allow for a better resolution of the system and a clearer discrimination of the reaction products. Several steps were undertaken during the analysis. The angular calibration of the setup was performed using the scattering reaction 10Be + 197Au at energies below the Coulomb barrier. The energy calibration of the E stage was performed using radioactive sources and corrected for high energies by applying a gain match procedure that allowed a tighter constrain in the event selection. The energy calibration of the thin detectors, done with low energy nuclear reactions and radioactive sources, had to consider the struggling of particles in the dead layers of the material to correctly determine the energy deposited by incident particles in the active detector layer. The results of this work will allow a more precise analysis of the reaction data on the exotic nucleus 10Be on the magic nucleus 120Sn, measured for the first time at energies around the Coulomb Barrier, at the LNS laboratory in Catania (Italy). |
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