Measurement of Decay of Radioactive and Isomer Nuclei by Spatial and Time Coincidence in the Timepix Pixel Detector
Result description
The high granularity of the pixel detector allows applying not only temporal but also spatial coincidence technique for background suppression. This is particularly important for scarcely populated nuclei and/or detection under high rate of unwanted/background events. For these different situations two methods were developed using a segmented ionization chamber as trigger: (i) a time-delayed opening (start) of the detector shutter, and (ii) a trigger-driven external clock with varying time delay with the detector shutter open. For these approaches, Timepix was operated in its time mode and in its time-over-threshold mode, respectively. The methods are demonstrated on the detection and decay measurement of 8He and 6He ions as well as of the 7.6 ?s 496.2keV isomer 98mY, respectively.
Keywords
The result's identifiers
Result code in IS VaVaI
Result on the web
DOI - Digital Object Identifier
Alternative languages
Result language
angličtina
Original language name
Measurement of Decay of Radioactive and Isomer Nuclei by Spatial and Time Coincidence in the Timepix Pixel Detector
Original language description
The high granularity of the pixel detector allows applying not only temporal but also spatial coincidence technique for background suppression. This is particularly important for scarcely populated nuclei and/or detection under high rate of unwanted/background events. For these different situations two methods were developed using a segmented ionization chamber as trigger: (i) a time-delayed opening (start) of the detector shutter, and (ii) a trigger-driven external clock with varying time delay with the detector shutter open. For these approaches, Timepix was operated in its time mode and in its time-over-threshold mode, respectively. The methods are demonstrated on the detection and decay measurement of 8He and 6He ions as well as of the 7.6 ?s 496.2keV isomer 98mY, respectively.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BG - Nuclear, atomic and molecular physics, accelerators
OECD FORD branch
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Result continuities
Project
LC07050: Center of experimental nuclear astrophysics and nuclear physics
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2011
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
XXXIII Workshop Nuclear Physics in Brazil
ISBN
978-0-7354-0908-8
ISSN
0094-243X
e-ISSN
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Number of pages
5
Pages from-to
99-103
Publisher name
American Institute of Physics
Place of publication
New York
Event location
Brazil
Event date
Sep 7, 2010
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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Basic information
Result type
D - Article in proceedings
CEP
BG - Nuclear, atomic and molecular physics, accelerators
Year of implementation
2011