Coherent elastic neutrino-nucleus scattering and low-mass dark matter detectors rely crucially on the understanding of their response to nuclear recoils. We report the first observation of a nuclear recoil peak at around 112 eV induced by neutron capture. The measurement was performed with a CaWO_{4} cryogenic detector from the NUCLEUS experiment exposed to a ^{252}Cf source placed in a compact moderator. We identify the expected peak structure from the single-γ de-excitation of ^{183}W with 3σ and its origin by neutron capture with 6σ significance. This result demonstrates a new method for precise, in situ, and nonintrusive calibration of low-threshold experiments.
Observation of a nuclear recoil peak at the 100 eV scale induced by neutron capture / Abele, H; Angloher, G; Bento, A; Canonica, L; Cappella, F; Cardani, L; Casali, N; Cerulli, R; Chalil, A; Chebboubi, A; Colantoni, I; Crocombette, J-P; Cruciani, A; Del Castello, G; Del Gallo Roccagiovine, M; Desforge, D; Doblhammer, A; Dumonteil, E; Dorer, S; Erhart, A; Fuss, A; Friedl, M; Garai, A; Ghete, V M; Giuliani, A; Goupy, C; Gunsing, F; Hauff, D; Jeanneau, F; Jericha, E; Kaznacheeva, M; Kinast, A; Kluck, H; Langenkämper, A; Lasserre, T; Letourneau, A; Lhuillier, D; Litaize, O; Mancuso, M; de Marcillac, P; Marnieros, S; Materna, T; Mauri, B; Mazzolari, A; Mazzucato, E; Neyrial, H; Nones, C; Oberauer, L; Ortmann, T; Ouzriat, A; Pattavina, L; Peters, L; Petricca, F; Poda, D V; Potzel, W; Pröbst, F; Reindl, F; Rogly, R; Romagnoni, M; Rothe, J; Schermer, N; Schieck, J; Schönert, S; Schwertner, C; Scola, L; Serot, O; Soum-Sidikov, G; Stodolsky, L; Strauss, R; Tamisari, M; Thulliez, L; Tomei, C; Vignati, M; Vivier, M; Wagner, V; Wex, A. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 130:21(2023), pp. 1-6. [10.1103/PhysRevLett.130.211802]
Observation of a nuclear recoil peak at the 100 eV scale induced by neutron capture
Cappella, F;Cardani, L;Casali, N;Colantoni, I;Cruciani, A;Del Castello, G;Del Gallo Roccagiovine, M;Vignati, M;
2023
Abstract
Coherent elastic neutrino-nucleus scattering and low-mass dark matter detectors rely crucially on the understanding of their response to nuclear recoils. We report the first observation of a nuclear recoil peak at around 112 eV induced by neutron capture. The measurement was performed with a CaWO_{4} cryogenic detector from the NUCLEUS experiment exposed to a ^{252}Cf source placed in a compact moderator. We identify the expected peak structure from the single-γ de-excitation of ^{183}W with 3σ and its origin by neutron capture with 6σ significance. This result demonstrates a new method for precise, in situ, and nonintrusive calibration of low-threshold experiments.| File | Dimensione | Formato | |
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