Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

An R&D of Molybdate scintillating crystals for the AMoRE phase-II

Jul 6, 2018, 6:30 PM
2h
COEX, SEOUL

COEX, SEOUL

Poster POSTER

Speaker

Dr Jungho So (Center for Underground Physics)

Description

The AMoRE (Advanced Molybdenum based Rare process Experiment) project is an experiment aiming for searching the neutrinoless double beta decay of $^{100}$Mo. The planned technique is a combination of 200 kg of X-Molybdates (~100 kg of $^{100}$Mo and X candidates are Ca, Li, Na, and Pb.) scintillating crystals as an absorber and metallic magnetic calorimeter (MMC) sensor as a heat and light signal detector at mK temperatures.

1.8 kg of $^{40}$Ca$^{100}$MoO$_{4}$ ($^{48}$Ca depleted, $^{100}$Mo enriched) scintillating crystals are currently installed in the AMoRE-pilot experiment and two candidate crystals, Na$_{2}$MoO$_{7}$ and Li$_{2}$MoO$_{4}$, have been being investigated for the large scale experiment with their easiness in crystal growth and internal background control.

The AMoRE phase-II with 200 kg of molybdate crystals aims to reach the range of the inverted neutrino mass hierarchy for an effective Majorana neutrino mass sensitivity of 10~30 meV which can be obtained by a zero background (~1 x 10$^{-4}$ count/keV/kg/y in total) experiment. In order to obtain the mass sensitivity, the internal background levels of the crystal are estimated to be less than 15 $\mu$Bq/kg for $^{226}$Ra and 1.5 $\mu$Bq/kg for $^{228}$Th.

We will report the current status of the R&D of molybdate crystals for the AMoRE phase-II.

Primary author

Dr Jungho So (Center for Underground Physics)

Co-authors

Mr Chulho Lee (Center for Underground Physics) Mr Daehoon Ha (Kyungpook National University) Mr Daeyeon Kim (Center for Underground Physics) Dr Douglas Leonard (Center for Underground Physics) Dr Eunju Jeon (Center for Underground Physics) Mrs Eunkyung Lee (Center for Underground Physics) Prof. Hongjoo Kim (Kyungpook National University) Prof. Hyangkyu Park (Korea University) Mrs Hyelim Kim (Kyungpook National University) Mr Jooyoung Lee (Kyungpook National University) Mr Jukyung Son (Center for Underground Physics) Mr Junseok Choi (Center for Underground Physics) Mrs Keonah Shin (Center for Underground Physics) Dr Moohyun Lee (Center for Underground Physics) Dr Olga Gileva (Center for Underground Physics) Mr Sejin Ra (Center for Underground Physics) Dr Woongu Kang (Center for Underground Physics) Prof. Yeongduk Kim (Center for Underground Physics) Dr Yonghamb Kim (Center for Underground Physics) Dr Youngsoo Yoon (Center for Underground Physics)

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