IV international conference on particle physics and astrophysics

22-26 October 2018
Hotel Intourist Kolomenskoye 4*
Europe/Moscow timezone

The background simulation of experiment for searching of 2K-capture in $^{124}$Xe

24 Oct 2018, 09:45
15m
Petrovskiy hall (Hotel Intourist Kolomenskoye 4*)

Petrovskiy hall

Hotel Intourist Kolomenskoye 4*

Kashyrskoye shosse, 39B, Moscow, Russia, 115409
Plenary/section talk Particle physics: neutrino physics

Description

During several years at the Baksan Neutrino Observatory INR RAS is undergoing the experiment for searching of 2K (2$\nu$)-capture in $^{124}$Xe. This isotope has several advantages: 1) it has the largest kinetic energy of transition Q – 2.866 MeV, among candidates of nuclei for which predicted the existence of ECEC; 2) since xenon is the noble gas, then it could be easily use as a system isotope-detecting medium in a gas detector. To search for 2K-capture in $^{124}$Xe the large volume copper proportional counter (LPC) is used.

In our work, we present the results of the simulation, with the Geant4 package, of LPC background from the decays of $^{238}$U and $^{232}$Th nuclei in the construction materials of the LPC case, as well as in elements of the low-background shield. The influence of neutrons produced in the rock of the underground laboratory from the decay of $^{238}$U and $^{232}$Th, where the experimental setup is located, on the production of the $^{125}$I isotope in the working gas of the detector, upon capture of thermalized neutrons by the $^{124}$Xe isotope is considered. The $^{125}$I isotope can have a significant influence on the background of the experiment since the total energy release in its decay belongs to the same energy region as ROI of 2K-capture in $^{124}$Xe.

Primary authors

Vladimir Kazalov (INR RAS) Yu. M. Gavrilyuk (INR RAS) Dr. A. M. Gangapshev (INR RAS) Dr. V. V. Kuzminov (INR RAS) Dr. S. I. Panasenko (V.N.Karazin Kharkiv National University) Dr. S. S. Ratkevich (V.N.Karazin Kharkiv National University) D. A. Tekueva (INR RAS) S. P. Yakimenko (INR RAS) A.D. Petrenko (V.N.Karazin Kharkiv National University)

Presentation Materials

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