{"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/prospects-of-direct-detection-of-48-v-gamma","title":"Prospects of direct detection of $^{48}$V gamma-rays from thermonuclear supernovae","arxiv_id":"2103.16840","date":"2021-03-31","proceeding":null,"authors":["Fiona H. Panther","Ivo R. Seitenzahl","Ashley J. Ruiter","Thomas Siegert","Stuart Sim","Roland M. Crocker"],"abstract":"Detection of gamma-rays emitted by radioactive isotopes synthesized in stellar explosions can give important insights into the processes that power transients such as supernovae, as well as providing a detailed census of the abundance of different isotope species relevant to the chemical evolution of the Universe. Observations of nearby supernovae have yielded observational proof that $^{57}$Co powered the late-time evolution of SN1987A's lightcurve, and conclusive evidence that $^{56}$Ni and its daughter nuclei power the light curves of Type Ia supernovae. In this paper we describe the prospects for detecting nuclear decay lines associated with the decay of $^{48}$V, the daughter nucleus of $^{48}$Cr, which is expected to be synthesised in large quantities - $M_{\\mathrm{Cr}}\\sim1.9\\times10^{-2}\\,\\mathrm{M_\\odot}$ - in transients initiated by explosive helium burning ($\\alpha$-capture) of a thick helium shell. We calculate emergent gamma-ray line fluxes for a simulated explosion model of a thermonuclear explosion of carbon-oxygen white dwarf core of mass $0.45\\,M_{\\odot}$ surrounded by a thick helium layer of mass $0.21\\,M_{\\odot}$. We present observational limits on the presence of $^{48}$V in nearby SNe Ia 2014J using the \\textit{INTEGRAL} space telescope, excluding a $^{48}$Cr production on the surface of more than $0.1\\,\\mathrm{M_{\\odot}}$. We find that the future gamma-ray mission AMEGO will have an approximately 5 per cent chance of observing $^{48}$V gamma-rays from such events during the currently-planned operational lifetime, based on our birthrate predictions of faint thermonuclear transients. We describe the conditions for a $3\\sigma$ detection by the gamma-ray telescopes \\textit{INTEGRAL}/SPI, COSI and AMEGO.","url_abs":"https://arxiv.org/abs/2103.16840v2","url_pdf":"https://arxiv.org/pdf/2103.16840v2.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":"prospects-of-direct-detection-of-48-v-gamma","repo_url":"https://github.com/fipanther/Vlineprospects","is_official":1,"mentioned_in_paper":1,"mentioned_in_github":0,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}