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Measurements of the ionization efficiency of protons in methane

Journal Article · · European Physical Journal. C, Particles and Fields (Online)
The amount of energy released by a nuclear recoil ionizing the atoms of the active volume of detection appears “quenched” compared to an electron of the same kinetic energy. This different behavior in ionization between electrons and nuclei is described by the Ionization Quenching Factor (IQF) and it plays a crucial role in direct dark matter searches. For low kinetic energies (below 50 keV ), IQF measurements deviate significantly from common models used for theoretical predictions and simulations. We report measurements of the IQF for proton, an appropriate target for searches of Dark Matter candidates with a mass of approximately 1 GeV , with kinetic energies in between 2 keV and 13 keV in 100 mbar of methane. We used the Comimac facility in order to produce the motion of nuclei and electrons of controlled kinetic energy in the active volume, and a NEWS-G SPC to measure the deposited energy. The Comimac electrons are used as a reference to calibrate the detector with 7 energy points. A detailed study of systematic effects led to the final results well fitted by IQF (EK)=E$$^α_K$$ / (β+E$$^α_K$$) with α=0.70±0.08 and β=1.32±0.17 . In agreement with some previous works in other gas mixtures, we measured less ionization energy than predicted from SRIM simulations, the difference reaching 33% at 2 keV .
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Contributing Organization:
NEWS-G Collaboration
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1973392
Report Number(s):
PNNL-SA-185012
Journal Information:
European Physical Journal. C, Particles and Fields (Online), Journal Name: European Physical Journal. C, Particles and Fields (Online) Journal Issue: 12 Vol. 82; ISSN 1434-6052
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

References (40)

Three-dimensional electron microscopy simulation with the CASINO Monte Carlo software journal May 2011
X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92 journal July 1993
Particle Detection with Drift Chambers book January 2008
Generation and spectroscopy of ultrasoft X-rays by non-dispersive methods journal February 1970
Ionization yield formation in argon-isobutane mixtures as measured by a proportional-counter method journal August 1996
A model of nuclear recoil scintillation efficiency in noble liquids journal August 2008
Interplay between scintillation and ionization in liquid xenon Dark Matter searches journal October 2011
First results from the NEWS-G direct dark matter search experiment at the LSM journal January 2018
Measurement of the response of heat-and-ionization germanium detectors to nuclear recoils
  • Benoit, A.; Bergé, L.; Blümer, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 577, Issue 3 https://doi.org/10.1016/j.nima.2007.04.118
journal July 2007
Simulation of space-charge effects in an ungated GEM-based TPC
  • Böhmer, F. V.; Ball, M.; Dørheim, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 719 https://doi.org/10.1016/j.nima.2013.04.020
journal August 2013
High-resolution ion pulse ionization chamber with air filling for the 222Rn decays detection
  • Gavrilyuk, Yu. M.; Gangapshev, A. M.; Gezhaev, A. M.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 801 https://doi.org/10.1016/j.nima.2015.08.034
journal November 2015
Determination of the total absorption peak in an electromagnetic calorimeter
  • Cheng, Jia-Hua; Wang, Zhe; Lebanowski, Logan
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 827 https://doi.org/10.1016/j.nima.2016.05.010
journal August 2016
A table-top ion and electron beam facility for ionization quenching measurement and gas detector calibration
  • Muraz, J. F.; Médard, J.; Couturier, C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 832 https://doi.org/10.1016/j.nima.2016.06.107
journal October 2016
Low energy recoil detection with a spherical proportional counter
  • Savvidis, I.; Katsioulas, I.; Eleftheriadis, C.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 877 https://doi.org/10.1016/j.nima.2017.09.014
journal January 2018
Nuclear-recoil energy scale in CDMS II silicon dark-matter detectors
  • Agnese, R.; Anderson, A. J.; Aramaki, T.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 905 https://doi.org/10.1016/j.nima.2018.07.028
journal October 2018
SRIM – The stopping and range of ions in matter (2010)
  • Ziegler, James F.; Ziegler, M. D.; Biersack, J. P.
  • Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Vol. 268, Issue 11-12 https://doi.org/10.1016/j.nimb.2010.02.091
journal June 2010
Bragg-like curve for dark matter searches: Binary gases journal October 2008
Microdosimetry: Principles and applications journal March 2016
Quenching factor measurement in low pressure gas detector for directional dark matter search journal January 2012
Ionization Quenching Factor measurement of 1 keV to 25 keV protons in Isobutane gas mixture journal January 2017
Ultracompact/ultralow power electron cyclotron resonance ion source for multipurpose applications journal February 2010
Problems in dose measurements for hadron therapy and BNCT due to dosimeter sensitivity quenching conference January 2019
Gaseous dark matter detectors journal October 2009
Recent advancements of the NEWS-G experiment journal February 2020
A measurement of the ionization efficiency of nuclear recoils in silicon journal June 2017
A multiball read-out for the spherical proportional counter journal December 2017
A resistive ACHINOS multi-anode structure with DLC coating for spherical proportional counters journal November 2020
Direction-sensitive dark matter search with gaseous tracking detector NEWAGE-0.3b' journal April 2015
Response of CsI[Na] to nuclear recoils: Impact on coherent elastic neutrino-nucleus scattering journal August 2019
Study of the ionization efficiency for nuclear recoils in pure crystals journal May 2020
Atomic limits in the search for galactic dark matter journal April 2015
Measurement of scintillation and ionization yield and scintillation pulse shape from nuclear recoils in liquid argon journal May 2015
Measurement of the ionization produced by sub-keV silicon nuclear recoils in a CCD dark matter detector journal October 2016
Measurement of the directional sensitivity of Dark Matter Time Projection Chamber detectors journal June 2017
Precision laser-based measurements of the single electron response of spherical proportional counters for the NEWS-G light dark matter search experiment journal May 2019
History of dark matter journal October 2018
The Construction and Anticipated Science of SNOLAB journal November 2010
Recent Developments of Monte-Carlo Codes Molflow+ and Synrad+ text January 2019
The Mean Energy Required to Form an Ion Pair for Low-Energy Photons and Electrons in Polyatomic Gases journal August 1988
Ultra Low Energy Results and Their Impact to Dark Matter and Low Energy Neutrino Physics journal January 2012

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