Cosmogenic production of Ar37 in the context of the LUX-ZEPLIN experiment

We estimate the amount of Ar37 produced in natural xenon via cosmic-ray-induced spallation, an inevitable consequence of the transportation and storage of xenon on the Earth’s surface. We then calculate the resulting Ar37 concentration in a 10-tonne payload (similar to that of the LUX-ZEPLIN experim...

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Veröffentlicht in:	Physical review. D 2022-04, Vol.105 (8)
Hauptverfasser:	Aalbers, J., Akerib, D. S., Alder, F., Ames, A., Anderson, T. J., Angelides, N., Araújo, H. M., Armstrong, J. E., Baker, A., Bang, J., Bargemann, J. W., Baxter, A., Bhatti, A., Biekert, A., Biesiadzinski, T. P., Brás, P., Busenitz, J. K., Buuck, M., Cascella, M., Chan, C., Chawla, A., Cole, A., Cottle, A., Cox, G., Creaner, O., Dahl, C. E., Dobson, J. E. Y., Druszkiewicz, E., Eriksen, S. R., Fan, A., Fayer, S., Fraser, E. D., Fruth, T., Genovesi, J., Gibson, E., Gilchriese, M. G. D., van der Grinten, M. G. D., Hall, C. R., Hertel, S. A., Ignarra, C. M., Johnson, J., Khaitan, D., Korolkova, E. V., Kudryavtsev, V. A., Leason, E. A., Lesko, K. T., Levy, C., Linehan, R., Lippincott, W. H., Lopes, M. I., Lopez Asamar, E., Lopez-Paredes, B., Majewski, P. A., McKinsey, D. N., Mizrachi, E., Morad, J. A., Morales Mendoza, J. D., Murphy, A. J., Nedlik, C., Nelson, H. N., Neves, F., Nikoleyczik, J. A., Olcina, I., Palladino, K. J., Parveen, N., Pease, E. K., Penning, B., Pereira, G., Piepke, A., Porzio, D., Qie, Y., Rischbieter, G. R. C., Rosero, R., Rushton, T., Santone, D., Schnee, R. W., Solovov, V. N., Sorensen, P., Stifter, K., Suerfu, B., Szydagis, M., Taylor, R., Temples, D. J., Terman, P. A., Tiedt, D. R., Timalsina, M., Tong, Z., Tovey, D. R., Tronstad, D. R., Turner, W., Utku, U., Wang, J. J., Wang, W., Watson, J. R., Webb, R. C., White, R. G., Wolfs, F. L. H., Xia, Q., Xu, J., Yeh, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	ASTRONOMY AND ASTROPHYSICS Breakup reactions INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY Nuclear reactions Nucleon induced nuclear reactions Particle dark matter PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Weakly interacting massive particles
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Zusammenfassung:	We estimate the amount of Ar37 produced in natural xenon via cosmic-ray-induced spallation, an inevitable consequence of the transportation and storage of xenon on the Earth’s surface. We then calculate the resulting Ar37 concentration in a 10-tonne payload (similar to that of the LUX-ZEPLIN experiment) assuming a representative schedule of xenon purification, storage, and delivery to the underground facility. Using the spallation model by Silberberg and Tsao, the sea-level production rate of Ar37 in natural xenon is estimated to be 0.024 atoms/kg/day. Assuming the xenon is successively purified to remove radioactive contaminants in 1-tonne batches at a rate of 1 tonne/month, the average Ar37 activity after 10 tons are purified and transported underground is 0.058-0.090 μBq/kg, depending on the degree of argon removal during above-ground purification. Such cosmogenic Ar37 will appear as a noticeable background in the early science data, while decaying with a 35-day half-life. This newly noticed production mechanism of Ar37 should be considered when planning for future liquid-xenon-based experiments.
ISSN:	2470-0010 2470-0029