Development of NTD Ge Sensors for Superconducting Bolometer

Neutron transmutation-doped (NTD) Ge sensors have been prepared by irradiating device-grade Ge with thermal neutrons at Dhruva reactor, BARC, Mumbai. These sensors are intended to be used for the study of neutrinoless double beta decay in \(^{124}\)Sn with a superconducting Tin bolometer. Resistance measurements are performed on NTD Ge sensors in the temperature range 100–350 mK. The observed temperature dependence is found to be consistent with the variable-range hopping mechanism.