2024-03-28T08:14:05Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/2240652020-12-01T08:30:04Zcom_10261_61com_10261_4col_10261_818
DIGITAL.CSIC
advisor
Gadea, Andrés
author
Collado Ruiz, Javier Primitivo
2020-12-01T08:30:03Z
2020-12-01T08:30:03Z
2020-03-27
http://hdl.handle.net/10261/224065
In the field of Nuclear Physics, high-resolution gamma ray spectroscopy is an
accurate method to perform nuclear structure studies, retrieving the energy and angular
distributions from gamma photons emitted in the transition between nuclear states. In
order to obtain the nucleus in an excited state, such that will emit gamma-rays, we are
forced to collide matter, doing nuclear reactions (in the in-beam spectroscopy) or resort to
the radioactive decay (decay spectroscopy). The High Purity Germanium (HPGe)
semiconductor detectors have shown to provide good response as gamma-ray detector. As
other semiconductor detectors, HPGe produce, with high sensitiveness, a current
proportional to gamma ray energies while there are subject to high voltage inverse
polarization, in cryogenic conditions.
The AGATA (Advanced GAmma Tracking Array) HPGe detector array is a state-ofthe-art detector array for the gamma ray spectroscopy technique in nuclear physics. In
order to improve the sensitivity, AGATA HPGe detectors have the outer contact divided in
36 segments in order to determine photon position and energy deposited in each segment.
With the interaction energy and position information is possible to reconstruct (Track) the
gamma-ray interaction sequence using tracking algorithms. With such technique is possible
to maximize the sensitivity of the detector array (energy resolution and P/T) without using
part of the detection solid angle for the anti-Compton active shields. In addition to the
segmented detectors, the positions sensitive HPGe arrays require sampling electronics with
spectroscopic signal-to-noise ratios, which provides the traces to be processed by the Pulse
Shape Analysis algorithms.
To provide maximum efficiency and sensitivity, the AGATA project aims to
construct a 4¿ solid angle detector array. This geometry optimizes as well the information
obtained, something that is especially important in experiments using expensiv ...
openAccess
Contributions to Phase Two of AGATA electronics
tesis doctoral
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URL
https://digital.csic.es/bitstream/10261/224065/1/Collado_Ruiz.pdf
File
MD5
8d637e68122ee293f12527afcba1b84f
9336856
application/octet-stream
Collado_Ruiz.pdf