Search for neutrinoless double-beta decay of 
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 with a natural broad energy germanium detector

We operated a p-type point contact high purity germanium (PPCGe) detector (CDEX-1B, 1.008 kg) in the China Jinping Underground Laboratory (CJPL) for 500.3 days to search for neutrinoless double beta ($\bb$) decay of $^{76}$Ge. A total of 504.3 kg$\cdot$day effective exposure data was accumulated. The anti-coincidence and the multi/single-site event (MSE/SSE) discrimination methods were used to suppress the background in the energy region of interest (ROI, 1989--2089 keV for this work) with a factor of 23. A background level of 0.33 counts/(keV$\cdot$kg$\cdot$yr) was achieved. The lower limit on the half life of $^{76}$Ge $\bb$ decay was constrained as $T_{1/2}^{0\nu}\ > \ {1.0}\times 10^{23}\ \rm yr\ (90\% \ C.L.)$, corresponding to the upper limits on the effective Majorana neutrino mass: $\langle m_{\beta\beta}\rangle < $ 3.2--7.5$\ \mathrm{eV}$.

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Search for neutrinoless double-beta decay of Ge76 with a natural broad energy germanium detector

Cited by 5 publications

References 43 publications

Relativistic model-free prediction for neutrinoless double beta decay at leading order

Relativistic model-free prediction for neutrinoless double beta decay at leading order

Correlation between neutrinoless double-β decay and double Gamow-Teller transitions

Searching for ⁷⁶Ge neutrinoless double beta decay with the CDEX-1B experiment*

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Search for neutrinoless double-beta decay of Ge76 with a natural broad energy germanium detector

Cited by 5 publications

References 43 publications

Relativistic model-free prediction for neutrinoless double beta decay at leading order

Relativistic model-free prediction for neutrinoless double beta decay at leading order

Correlation between neutrinoless double-β decay and double Gamow-Teller transitions

Searching for 76Ge neutrinoless double beta decay with the CDEX-1B experiment*

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Searching for ⁷⁶Ge neutrinoless double beta decay with the CDEX-1B experiment*