HNPS Advances in Nuclear Physics Banner

A novel methodology for the treatment of the 𝛾-flash for fission experiments with Micromegas at EAR1 of n_TOF (CERN).

pdf
Published: Feb 24, 2026
DOI: https://doi.org/10.12681/hnpsanp.8971
Keywords:
n_TOF facility Micromegas fission
Nikolaos Kyritsis
National Technical University of Athens, Department of Physics, Zografou Campus, Athens, Greece
https://orcid.org/0009-0005-4560-2042
Maria Diakaki
National Technical University of Athens, Department of Physics, Zografou Campus, Athens, Greece
Veatriki Michalopoulou
National Technical University of Athens, Department of Physics, Zografou Campus, Athens, Greece
Zinovia Eleme
University of Ioannina, University Campus, Ioannina, Greece
Michael Kokkoris
National Technical University of Athens, Department of Physics, Zografou Campus, Athens, Greece
Nikolaos Nicolis
National Technical University of Athens, Department of Physics, Zografou Campus, Athens, Greece
Nikolaos Patronis
University of Ioannina, University Campus, Ioannina, Greece
https://orcid.org/0000-0002-0359-2895
Roza Vlastou
National Technical University of Athens, Department of Physics, Zografou Campus, Athens, Greece
n_TOF collaboration
Abstract

The study of neutron induced fission reactions in major and minor actinides is an ongoing effort, important both for the development of advanced nuclear systems, such as Generation IV reactors and accelerator driven systems and for basic research on the fission process. As part of this effort an new measurement of the 243Am (n,f) reaction cross-section took place at the n_TOF facility (CERN) to provide data from thermal neutrons up to hundreds of MeV. In this work a novel method for the treatment of the 𝛾-flash in EAR1 of the n_TOF facility has been developed in order to extend the upper limit of the measured neutron energies. This approach has been experimentally tested using the reference targets of the 243Am measurement, 235U and 238U, to show the maximum neutron energy that can be measured with this setup. The results of this analysis are presented here.

Article Details
  • Section
  • Oral contributions
Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

References
N. Colonna et al. “The fission experimental programme at the CERN n_TOF facility: status and perspectives”. In: Eur. Phys. J. A 56.2 (2020), p. 48. doi: 10.1140/epja/s10050-020-00037-8
V. Michalopoulou et al. “Measurement of the neutron--induced fission cross section of 230That the CERN n_TOF facility”. In: Phys. Rev. C 108 (1 2023), p. 014616. doi: 10.1103/PhysRevC.108.014616
A. Stamatopoulos et al. “Investigation of the 240Pu(𝑛, 𝑓 ) reaction at the n_TOF/EAR2 facility in the 9 meV–6 MeV range”. In: Phys. Rev. C 102 (1 2020), p. 014616. doi: 10.1103/PhysRevC.102.014616
Z. Eleme et al. “First results of the 241Am(n,f) cross section measurement at the Experimental Area 2 of the n_TOF facility at CERN”. In: EPJ Web Conf. 239 (2020), p. 05014. doi: 10.1051/epjconf/202023905014
S. Andriamonje et al. “Development and performance of Microbulk Micromegas detectors”. In: JINST 5 (2010), P02001. doi: 10.1088/1748-0221/5/02/P02001
P. Žugec et al. “Pulse processing routines for neutron time-of-flight data”. In: Nucl. Instrum. Meth. Phys. Res. A 812 (2016), pp. 134–144. issn: 0168-9002. doi: 10.1016/j.nima.2015.12.054