Recent advancements of the experiment to search for 2K capture in $^{124}$Xe using a large proportional counter

1 Sep 2021, 18:00
1h 30m
Poster Neutrino physics and astrophysics Poster session 2


Vladimir Kazalov (INR RAS)


Here we report the current sensitivity of the large proportional counter to a $^{124}$Xe 2$\nu$ECEC filled with xenon gas up to 5 atm. One of the main procedures for detecting ECEC decays of $^{124}$Xe in an experiment using a gas target is identifying three charge ionization clusters released during the absorption of two X-ray quanta and Auger electrons from a daughter atom. The developed new algorithm for digital processing of signals taken from the detector made it possible to consider the loss of electrons due to diffuseness and recombination in the track and correct the total energy release for the response of a separate absorbed particle. Thus, by increasing the efficiency of selecting useful events, we expect an increase in the sensitivity to the half-life 2$\nu$2K-mode for a 6-year run to $2×10^{22}$ y (at 90% C.L.) in the current experiment.

Primary authors

Mr. Oleksiy Petrenko (V.N.Karazin Kharkiv National University, Ukraine) Vladimir Kazalov (INR RAS) Dr. Albert Gangapshev (INR RAS) Mr. Yuriy Gavrilyuk (INR RAS) Dr. Valeriy Kuzminov (INR RAS) Dr. Serhiy Panasenko (V.N.Karazin Kharkiv National University, Ukraine) Dr. Serhiy Ratkevich (V.N.Karazin Kharkiv National University, Ukraine)

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