Precision measurement of Compton scattering in silicon with a skipper CCD for dark matter detection
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A90107%2F22%3A00363777" target="_blank" >RIV/68407700:90107/22:00363777 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/PhysRevD.106.092001" target="_blank" >https://doi.org/10.1103/PhysRevD.106.092001</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevD.106.092001" target="_blank" >10.1103/PhysRevD.106.092001</a>
Alternative languages
Result language
angličtina
Original language name
Precision measurement of Compton scattering in silicon with a skipper CCD for dark matter detection
Original language description
Experiments aiming to directly detect dark matter through particle recoils can achieve energy thresholds of Oo10 eV thorn . In this regime, ionization signals from small-angle Compton scatters of environmental gamma rays constitute a significant background. Monte Carlo simulations used to build background models have not been experimentally validated at these low energies. We report a precision measurement of Compton scattering on silicon atomic shell electrons down to 23 eV. A skipper charge-coupled device with single -electron resolution, developed for the DAMIC-M experiment, was exposed to a 241Am gamma-ray source over several months. Features associated with the silicon K-, L1-, and L2;3-shells are clearly identified, and scattering on valence electrons is detected for the first time below 100 eV. We find that the relativistic impulse approximation for Compton scattering, which is implemented in Monte Carlo simulations commonly used by direct detection experiments, does not reproduce the measured spectrum below 0.5 keV. The data are in better agreement with ab initio calculations originally developed for x-ray absorption spectroscopy.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10304 - Nuclear physics
Result continuities
Project
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Continuities
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Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review D
ISSN
2470-0010
e-ISSN
2470-0029
Volume of the periodical
106
Issue of the periodical within the volume
9
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
"092001-1"-"092001-12"
UT code for WoS article
000886709000009
EID of the result in the Scopus database
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