{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/improved-stereo-simulation-with-a-new-gamma","title":"Improved STEREO simulation with a new gamma ray spectrum of excited gadolinium isotopes using FIFRELIN","arxiv_id":"1905.11967","date":"2019-05-28","proceeding":null,"authors":["H. Almazán","L. Bernard","A. Blanchet","A. Bonhomme","C. Buck","A. Chebboubi","P. del Amo Sanchez","I. El Atmani","J. Haser","F. Kandzia","S. Kox","L. Labit","J. Lamblin","A. Letourneau","D. Lhuillier","M. Lindner","O. Litaize","T. Materna","A. Minotti","H. Pessard","J. -S. Réal","C. Roca","T. Salagnac","V. Savu","S. Schoppmann","V. Sergeyeva","T. Soldner","A. Stutz","L. Thulliez","M. Vialat"],"abstract":"The STEREO experiment measures the electron antineutrino spectrum emitted in a research reactor using the inverse beta decay reaction on H nuclei in a gadolinium loaded liquid scintillator. The detection is based on a signal coincidence of a prompt positron and a delayed neutron capture event. The simulated response of the neutron capture on gadolinium is crucial for the comparison with data, in particular in the case of the detection efficiency. Among all stable isotopes, $^{155}$Gd and $^{157}$Gd have the highest cross sections for thermal neutron capture. The excited nuclei after the neutron capture emit gamma rays with a total energy of about 8 MeV. The complex level schemes of $^{156}$Gd and $^{158}$Gd are a challenge for the modeling and prediction of the deexcitation spectrum, especially for compact detectors where gamma rays can escape the active volume. With a new description of the Gd(n,${\\gamma}$) cascades obtained using the FIFRELIN code, the agreement between simulation and measurements with a neutron calibration source was significantly improved in the STEREO experiment. A database of ten millions of deexcitation cascades for each isotope has been generated and is now available for the user.","url_abs":"http://arxiv.org/abs/1905.11967v2","url_pdf":"http://arxiv.org/pdf/1905.11967v2.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"improved-stereo-simulation-with-a-new-gamma","repo_url":"https://zenodo.org/record/3384633","is_official":1,"mentioned_in_paper":0,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}