Development of MMC-based lithium molybdate cryogenic calorimeters for AMoRE-II
Abstract
The AMoRE collaboration searches for neutrinoless double beta decay of Mo using molybdate scintillating crystals via low temperature thermal calorimetric detection. The early phases of the experiment, AMoRE-pilot and AMoRE-I, have demonstrated competitive discovery potential. Presently, the AMoRE-II experiment, featuring a large detector array with about 90 kg of Mo isotope, is under construction. This paper discusses the baseline design and characterization of the lithium molybdate cryogenic calorimeters to be used in the AMoRE-II detector modules. The results from prototype setups that incorporate new housing structures and two different crystal masses (316 g and 517 - 521 g), operated at 10 mK temperature, show energy resolutions (FWHM) of 7.55 - 8.82 keV at the 2.615 MeV Tl line, and effective light detection of 0.79 - 0.96 keV/MeV. The simultaneous heat and light detection enables clear separation of alpha particles with a discrimination power of 12.37 - 19.50 at the energy region around Li(n, )H with Q-value = 4.785 MeV. Promising detector performances were demonstrated at temperatures as high as 30 mK, which relaxes the temperature constraints for operating the large AMoRE-II array.
Cite
@article{arxiv.2407.12227,
title = {Development of MMC-based lithium molybdate cryogenic calorimeters for AMoRE-II},
author = {A. Agrawal and V. V. Alenkov and P. Aryal and H. Bae and J. Beyer and B. Bhandari and R. S. Boiko and K. Boonin and O. Buzanov and C. R. Byeon and N. Chanthima and M. K. Cheoun and J. S. Choe and S. Choi and S. Choudhury and J. S. Chung and F. A. Danevich and M. Djamal and D. Drung and C. Enss and A. Fleischmann and A. M. Gangapshev and L. Gastaldo and Y. M. Gavrilyuk and A. M. Gezhaev and O. Gileva and V. D. Grigorieva and V. I. Gurentsov and C. Ha and D. H. Ha and E. J. Ha and D. H. Hwang and E. J. Jeon and J. A. Jeon and H. S. Jo and J. Kaewkhao and C. S. Kang and W. G. Kang and V. V. Kazalov and S. Kempf and A. Khan and S. Khan and D. Y. Kim and G. W. Kim and H. B. Kim and H. J. Kim and H. J. Kim and H. L. Kim and H. S. Kim and M. B. Kim and S. C. Kim and S. K. Kim and S. R. Kim and W. T. Kim and Y. D. Kim and Y. H. Kim and K. Kirdsiri and Y. J. Ko and V. V. Kobychev and V. Kornoukhov and V. V. Kuzminov and D. H. Kwon and C. H. Lee and D. Y. Lee and E. K. Lee and H. J. Lee and H. S. Lee and J. Lee and J. Y. Lee and K. B. Lee and M. H. Lee and M. K. Lee and S. W. Lee and Y. C. Lee and D. S. Leonard and H. S. Lim and B. Mailyan and E. P. Makarov and P. Nyanda and Y. Oh and S. L. Olsen and S. I. Panasenko and H. K. Park and H. S. Park and K. S. Park and S. Y. Park and O. G. Polischuk and H. Prihtiadi and S. Ra and S. S. Ratkevich and G. Rooh and M. B. Sari and J. Seo and K. M. Seo and B. Sharma and K. A. Shin and V. N. Shlegel and K. Siyeon and J. So and N. V. Sokur and J. K. Son and J. W. Song and N. Srisittipokakun and V. I. Tretyak and R. Wirawan and K. R. Woo and H. J. Yeon and Y. S. Yoon and Q. Yue},
journal= {arXiv preprint arXiv:2407.12227},
year = {2025}
}