Phys.Rev. C 105, 045801 (2022)

B.Lehnert, M.Hult, G.Lutter, G.Marissens, S.Oberstedt, H.Stroh, J.Kotila, A.Oberstedt, K.Zuber

Constraints on partial half-lives of ¹³⁶Ce and ¹³⁸Ce double electron captures

RADIOACTIVITY ¹³⁶Ce(2EC), (β⁺EC); ¹³⁸Ce(2EC); measured Eγ, Iγ; deduced constraints on the T_1/2 of various decay modes including neutrinoless (0νKL and 0νLL to the ground state for ^138Ce, 0νKL, 0νLL and 0νKK to ground and excited states for ¹³⁶Ce). CeBr3 crystal with mass 4381 g measured with HPGe coaxial detector over three years at the HADES underground laboratory. Comparison to other experimental data and theoretical predictions.

doi: 10.1103/PhysRevC.105.045801