{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"5ff4c897e00de74e38959be5a76e5d6b8a11c6d4187f505f1d1ecfd34231ca42","created":"2026-10-03T07:18:05Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011","98346228f946fa34c35c0bba2e57e86bbe58ec683f6d3f7ab0b511bb4587c1bc"],"salt":"9523a0ae10a1063d26da807fa4d5ab29f14f38d036b053f7dde06421fce78463","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"classification","assisted_by":[],"external_id":"hep.dama-modulation.recoil-type","kind":"well-posed","literature_status":"open","n":"1","parents":[{"note":"","parent_revision":"98346228f946fa34c35c0bba2e57e86bbe58ec683f6d3f7ab0b511bb4587c1bc","relation":"special_case"}],"plain":"A dark matter particle would mostly knock a nucleus, while radioactivity mostly knocks electrons. A cooled sodium iodide detector that measures both heat and light can tell these apart.","posed_since":"","precise":"Conventional NaI(Tl) scintillators cannot discriminate nuclear from electron recoils at 1-6 keVee. A cryogenic NaI scintillating calorimeter (COSINUS at LNGS) reads phonon and scintillation channels, giving recoil-type discrimination event by event. The question is the composition of the 1-6 keVee rate in NaI and whether any modulating component is nuclear-recoil-like.","problem_ref":null,"references":"","settled_by":"A COSINUS-type measurement with nuclear-electron recoil discrimination and enough exposure to test the DAMA rate and modulation in the nuclear-recoil band.","status_note":"COSINUS-1pi Run 1 with eight cryogenic NaI modules at LNGS was planned to start data taking in 2026 (Commun. Phys. 9, 213, 2026); no result yet.","title":"Are DAMA-region NaI events nuclear or electron recoils?","topic_ref":"bae30d7e0bff60d245dc8d2942ec787f5c4f8b537f39d87886f379ac68f6e220"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"00c8413ef463f5defc4df117d0e23b46323002942584f9826bb242397ce920f1","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"f01930cf956c88e08f354887fa197fd9cfeb7f9e40466da99325c2e0f02989dc","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"cuQdSRQLLPubSFvO3XgAzMWfDfa9thvl-MrFKwyrtIz8rbLT_36gZ9Xq93RRDFcDYZg_pJwRCN0wofLltceBCg"},"schema":"pubphys.envelope/1"},"record_hash":"00c8413ef463f5defc4df117d0e23b46323002942584f9826bb242397ce920f1","leaf_index":1531}