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Dead layer determination for the new implantation detector of the LUNDIUM decay station

Kosta, Eleftheria LU (2022) FYSK02 20212
Nuclear physics
Department of Physics
Abstract
The Nuclear Structure Group in Lund, focuses on nuclear spectroscopy of decays of rare isotopes. A new decay station, called LUNDIUM, is currently being built, which will involve silicon and germanium detectors for the study of these nuclei. This thesis focuses on the characterization of one of the new silicon detectors, the implantation one. More specifically, the dead layer is determined over the entire surface of the detector. The silicon detector is ion-implanted and silicon dioxide passivated, forming the dead layer, which is unable to record the energies of the particles passing through. Superheavy elements decay by alpha decay, and the energy registered on the detectors from the alpha particles depends on the amount of material that... (More)
The Nuclear Structure Group in Lund, focuses on nuclear spectroscopy of decays of rare isotopes. A new decay station, called LUNDIUM, is currently being built, which will involve silicon and germanium detectors for the study of these nuclei. This thesis focuses on the characterization of one of the new silicon detectors, the implantation one. More specifically, the dead layer is determined over the entire surface of the detector. The silicon detector is ion-implanted and silicon dioxide passivated, forming the dead layer, which is unable to record the energies of the particles passing through. Superheavy elements decay by alpha decay, and the energy registered on the detectors from the alpha particles depends on the amount of material that they have to pass through. By knowing the thickness of the dead layer, the full energy of the particles can be reconstructed. During superheavy experiments, the compound nucleus is implanted in the implantation detector. The dead layer plays a significant role in correcting the energy emission of the particles that escape the implantation detector and are stopped in one of the box detectors. For the dead layer thickness determination, data with two alpha sources Gd-148 and Cm-244, as well as an electron source Ba-133 were taken and analyzed. The dead layer was found to be in the order of 0.6 μm. (Less)
Popular Abstract
A part of nuclear physics focuses on superheavy elements at the higher end of periodic table. The creation of superheavy elements is as fascinating as it sounds and it involves a sequence of work in order to be achieved. In Lund, the most up-to-date decay station is currently being built, focusing on decay spectroscopy of these exotic nuclei. These synthetically created superheavy elements, are studied by the detection of their decay products. For their detection, high quality detectors are used. This thesis focuses on the characterization of the implantation detector, which is a silicon detector responsible for detecting charged particles. The thickness of the dead layer over the surface of the detector is determined. This dead layer is a... (More)
A part of nuclear physics focuses on superheavy elements at the higher end of periodic table. The creation of superheavy elements is as fascinating as it sounds and it involves a sequence of work in order to be achieved. In Lund, the most up-to-date decay station is currently being built, focusing on decay spectroscopy of these exotic nuclei. These synthetically created superheavy elements, are studied by the detection of their decay products. For their detection, high quality detectors are used. This thesis focuses on the characterization of the implantation detector, which is a silicon detector responsible for detecting charged particles. The thickness of the dead layer over the surface of the detector is determined. This dead layer is a mixture of ion-implanted, aluminium and silicon dioxide and it is unable to record the energies of the particles passing through. By knowing the thickness of it, the true emission energy of the particles can be reconstructed. In our lab, the silicon detector is called DSSSD, which stands for Double-Sided Silicon-Strip Detector and it has 58 horizontal and 58 vertical strips, creating a 2-Dimensional surface with a total of 3364 pixels. In order to determine the thickness of the dead layer in each pixel, data with two alpha and one electron sources were taken. (Less)
Please use this url to cite or link to this publication:
author
Kosta, Eleftheria LU
supervisor
organization
course
FYSK02 20212
year
type
M2 - Bachelor Degree
subject
language
English
id
9074244
date added to LUP
2022-02-01 13:02:59
date last changed
2022-02-01 13:02:59
@misc{9074244,
  abstract     = {{The Nuclear Structure Group in Lund, focuses on nuclear spectroscopy of decays of rare isotopes. A new decay station, called LUNDIUM, is currently being built, which will involve silicon and germanium detectors for the study of these nuclei. This thesis focuses on the characterization of one of the new silicon detectors, the implantation one. More specifically, the dead layer is determined over the entire surface of the detector. The silicon detector is ion-implanted and silicon dioxide passivated, forming the dead layer, which is unable to record the energies of the particles passing through. Superheavy elements decay by alpha decay, and the energy registered on the detectors from the alpha particles depends on the amount of material that they have to pass through. By knowing the thickness of the dead layer, the full energy of the particles can be reconstructed. During superheavy experiments, the compound nucleus is implanted in the implantation detector. The dead layer plays a significant role in correcting the energy emission of the particles that escape the implantation detector and are stopped in one of the box detectors. For the dead layer thickness determination, data with two alpha sources Gd-148 and Cm-244, as well as an electron source Ba-133 were taken and analyzed. The dead layer was found to be in the order of 0.6 μm.}},
  author       = {{Kosta, Eleftheria}},
  language     = {{eng}},
  note         = {{Student Paper}},
  title        = {{Dead layer determination for the new implantation detector of the LUNDIUM decay station}},
  year         = {{2022}},
}