DOE OSTI · 1898602
Development of a 127 Xe calibration source for nEXO
Abstract
Here, we study a possible calibration technique for the nEXO experiment using a 127 Xe electron capture source. nEXO is a next-generation search for neutrinoless double beta decay (0νββ) that will use a 5-tonne, monolithic liquid xenon time projection chamber (TPC). The xenon, used both as source and detection medium, will be enriched to 90% in 136 Xe. To optimize the event reconstruction and energy resolution, calibrations are needed to map the position- and time-dependent detector response. The 36.3 day half-life of 127 Xe and its small Q-value compared to that of 136 Xe 0νββ would allow a small activity to be maintained continuously in the detector during normal operations without introducing additional backgrounds, thereby enabling in-situ calibration and monitoring of the detector response. In this work we describe a process for producing the source and preliminary experimental tests. We then use simulations to project the precision with which such a source could calibrate spatial corrections to the light and charge response of the nEXO TPC.
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Lenardo, B. G., Hardy, C. A., Tsang, R. H.M., Nzobadila Ondze, J. C., Piepke, A., Triambak, S., Jamil, A., Adhikari, G., Al Kharusi, S., Angelico, E., Arnquist, I. J., Belov, V., Bernard, E. P., Bhat, A., Bhatta, T., Bolotnikov, A., Breur, P. A., Brodsky, J. P., Brown, E., Brunner, T., Caden, E., Cao, G. F., Cao, L., Chana, B., Charlebois, S. A., Chernyak, D., Chiu, M., Cohen, J. R., Collister, R., Dalmasson, J., Daniels, T., Darroch, L., DeVoe, R., di Vacri, M. L., Ding, Y. Y., Dolinski, M. J., Echevers, J., Eckert, B., Elbeltagi, M., Fabris, L., Fairbank, D., Fairbank, W., Farine, J., Fu, Y. S., Gallina, G., Gautam, P., Giacomini, G., Gillis, W., Gingras, C., Gornea, R., Gratta, G., Harouaka, K., Heffner, M., Hein, E., Hößl, J., House, A., Iverson, A., Jiang, X. S., Karelin, A., Kaufman, L. J., Krücken, R., Kuchenkov, A., Kumar, K. S., Larson, A., Leach, K. G., Leonard, D. S., Li, G., Li, S., Li, Z., Licciardi, C., Lindsay, R., MacLellan, R., Masbou, J., McMichael, K., Medina Peregrina, M., Mong, B., Moore, D. C., Murray, K., Nattress, J., Natzke, C. R., Ngwadla, X. E., Ni, K., Ning, Z., Orrell, J. L., Ortega, G. S., Ostrovskiy, I., Overman, C. T., Perna, A., Pinto Franco, T., Pocar, A., Pratte, J. F., Priel, N., Raguzin, E., Ramonnye, G. J., Rasiwala, H., Raymond, K., Richardson, G., Richman, M., Ringuette, J., Rowson, P. C.. 2022-07-20. Development of a 127 Xe calibration source for nEXO. https://doi.org/10.1088/1748-0221%2F17%2F07%2Fp07028
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