Speaker
Description
Neutrinos true nature is yet to be known, i.e., Dirac or Majorana. The most practical way to probe Majorana neutrino is by observing the neutrinoless double-beta (0$\nu\beta\beta$) decay. The observation not only confirms the Majorana nature but also constraints the effective Majorana neutrino mass (m$_{\beta\beta}$) and shows the total lepton number is not a conserved quantity. Several experiments are planned to observe the 0$\nu\beta\beta$ decay. However, the detection of 0$\nu\beta\beta$ decay is extremely challenging as the region of interest is largely populated by various backgrounds. $^{136}$Xe is an attractive candidate for 0$\nu\beta\beta$ decay search with a Q$_{\beta\beta}=$ 2457.83 $\pm$ 0.37 keV. Liquid xenon experiments$-$ LUX-ZEPLIN, nEXO, KamLAND2-Zen, XENONnT, etc., are sensitive for 0$\nu\beta\beta$ decay search of $^{136}$Xe. The KamLAND2-Zen experiment sets the most stringent lower limit on the half-life of 0$\nu\beta\beta$ decay: T$^{0\nu}_{1/2}$ $>$ 3.8×10$^{26}$ yr at 90$\%$ C.L. and upper limit on m$_{\beta\beta}$ are in the range 28-122 meV. Neutron-capture with $^{136}$Xe induces the radioactive $^{137}$Xe, which could cause a background for the signal region. In this work, we simulate the production of $^{137}$Xe in a cryostat filled with liquid xenon. Different neutrons of various resonance energies are confined in a cryostat and determine the production of $^{137}$Xe.
