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Observation of two nuclear recoil peaks induced by neutron capture on Al2O3

Fuente: arXiv

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Bibliographic Details
Main Authors:	Abele, H., Ajello, P., Arnold, B., Bossio, E., Burkhart, J., Cappella, F., Casali, N., Cerulli, R., Crocombette, J-P., del Castello, G., Roccagiovine, M. del Gallo, de Marcillac, P., Dorer, S., Doutre, C., Erhart, A., Fichtinger, S., Friedl, M., Goupy, C., Hauff, D., Jericha, E., Kaznacheeva, M., Kluck, H., Lasserre, T., Lhuillier, D., Litaize, O., Marnieros, S., Martin, R., Namuth, E., Ortmann, T., Peters, L., Poda, D. V., Reindl, F., Reindl, W., Rothe, J., Schermer, N., Schieck, J., Schönert, S., Schwertner, C., Soum-Sidikov, G., Strauss, R., Thalmeier, R., Thulliez, L., Vignati, M., Vivier, M., Wasser, P., Wex, A.
Format:	Preprint
Published:	2025
Subjects:	Instrumentation and Detectors Nuclear Experiment
Online Access:	Acceder al recurso
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author	Abele, H. Ajello, P. Arnold, B. Bossio, E. Burkhart, J. Cappella, F. Casali, N. Cerulli, R. Crocombette, J-P. del Castello, G. Roccagiovine, M. del Gallo de Marcillac, P. Dorer, S. Doutre, C. Erhart, A. Fichtinger, S. Friedl, M. Goupy, C. Hauff, D. Jericha, E. Kaznacheeva, M. Kluck, H. Lasserre, T. Lhuillier, D. Litaize, O. Marnieros, S. Martin, R. Namuth, E. Ortmann, T. Peters, L. Poda, D. V. Reindl, F. Reindl, W. Rothe, J. Schermer, N. Schieck, J. Schönert, S. Schwertner, C. Soum-Sidikov, G. Strauss, R. Thalmeier, R. Thulliez, L. Vignati, M. Vivier, M. Wasser, P. Wex, A.
author_facet	Abele, H. Ajello, P. Arnold, B. Bossio, E. Burkhart, J. Cappella, F. Casali, N. Cerulli, R. Crocombette, J-P. del Castello, G. Roccagiovine, M. del Gallo de Marcillac, P. Dorer, S. Doutre, C. Erhart, A. Fichtinger, S. Friedl, M. Goupy, C. Hauff, D. Jericha, E. Kaznacheeva, M. Kluck, H. Lasserre, T. Lhuillier, D. Litaize, O. Marnieros, S. Martin, R. Namuth, E. Ortmann, T. Peters, L. Poda, D. V. Reindl, F. Reindl, W. Rothe, J. Schermer, N. Schieck, J. Schönert, S. Schwertner, C. Soum-Sidikov, G. Strauss, R. Thalmeier, R. Thulliez, L. Vignati, M. Vivier, M. Wasser, P. Wex, A.
contents	We report the observation of two nuclear recoil peaks induced by neutron capture on aluminum in a cryogenic Al$_2$O$_3$ detector developed by the NUCLEUS collaboration for the detection of reactor neutrinos via coherent elastic neutrino-nucleus (CEvNS) process. Data collected at the Technical University of Munich in 2024 with a $^{252}$Cf source reveal a main recoil line at 1145 eV from single-$γ$ de-excitation of $^{28}$Al and a newly observed structure near 575 eV originating from several two-$γ$ cascades. The latter constitutes the first direct measurement of a nuclear recoil line induced by multi-$γ$ cascades. It is predicted by our simulations when the recoiling nucleus has time to stop before the emission of the next $γ$-ray in the cascade. These results demonstrate the potential performance of the CRAB (Calibration Recoil for Accurate Bolometry) method for in situ nuclear recoil calibration and highlight the importance of accurately modeling recoil stopping and nuclear de-excitation times in cryogenic detectors of CEvNS and dark matter interactions.
format	Preprint
id	arxiv_https___arxiv_org_abs_2512_06507
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Observation of two nuclear recoil peaks induced by neutron capture on Al2O3 Abele, H. Ajello, P. Arnold, B. Bossio, E. Burkhart, J. Cappella, F. Casali, N. Cerulli, R. Crocombette, J-P. del Castello, G. Roccagiovine, M. del Gallo de Marcillac, P. Dorer, S. Doutre, C. Erhart, A. Fichtinger, S. Friedl, M. Goupy, C. Hauff, D. Jericha, E. Kaznacheeva, M. Kluck, H. Lasserre, T. Lhuillier, D. Litaize, O. Marnieros, S. Martin, R. Namuth, E. Ortmann, T. Peters, L. Poda, D. V. Reindl, F. Reindl, W. Rothe, J. Schermer, N. Schieck, J. Schönert, S. Schwertner, C. Soum-Sidikov, G. Strauss, R. Thalmeier, R. Thulliez, L. Vignati, M. Vivier, M. Wasser, P. Wex, A. Instrumentation and Detectors Nuclear Experiment We report the observation of two nuclear recoil peaks induced by neutron capture on aluminum in a cryogenic Al$_2$O$_3$ detector developed by the NUCLEUS collaboration for the detection of reactor neutrinos via coherent elastic neutrino-nucleus (CEvNS) process. Data collected at the Technical University of Munich in 2024 with a $^{252}$Cf source reveal a main recoil line at 1145 eV from single-$γ$ de-excitation of $^{28}$Al and a newly observed structure near 575 eV originating from several two-$γ$ cascades. The latter constitutes the first direct measurement of a nuclear recoil line induced by multi-$γ$ cascades. It is predicted by our simulations when the recoiling nucleus has time to stop before the emission of the next $γ$-ray in the cascade. These results demonstrate the potential performance of the CRAB (Calibration Recoil for Accurate Bolometry) method for in situ nuclear recoil calibration and highlight the importance of accurately modeling recoil stopping and nuclear de-excitation times in cryogenic detectors of CEvNS and dark matter interactions.
title	Observation of two nuclear recoil peaks induced by neutron capture on Al2O3
topic	Instrumentation and Detectors Nuclear Experiment
url	https://arxiv.org/abs/2512.06507