Assessment of 53Mn deposition on Earth via accelerator mass spectrometry. (October 2018)

• Record Type: Journal Article
• Authors: Rodrigues, Darío; Negri, Agustín E.; Balpardo, Christian; Arazi, Andrés; Faestermann, Thomas; Fernandez Niello, Jorge O.; Fimiani, Leticia; Gómez Guzmán, José Manuel; Hain, Karin; Korschinek, Gunther; Ludwig, Peter; Marti, Guillermo V.
• Is Part Of: Applied radiation and isotopes. Volume 140(2018:Oct.)
• Page Start: 342
• Page End: 346
• Publication Date: 2018-10
• Subjects: Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2018.08.001
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: The 53 Mn flux onto Earth is a quantity relevant for different extraterrestrial and astrophysical questions. It is a proxy for related fluxes, such as supernova-produced material or interplanetary dust particles. In this work, we performed a first attempt to assess the 53 Mn flux by measuring the 53 Mn/ 10 Be isotopic ratio in a 1400 L sample of molten Antarctic snow by AMS (Accelerator Mass Spectrometry). Using the 10 Be production rate in the atmosphere, an upper limit of 5.5 × 10 3 atoms cm −2 yr −1 was estimated for the deposition of extraterrestrial 53 Mn. This result is compatible with one of the two discrepant values existing in the literature. Highlights: A novel approach to assess the 53 Mn deposition on Earth is proposed. 1400 l of snow from Antarctica were chemically processed to extract Mn and Be. 53 Mn/ 55 Mn and 10 Be/ 9 Be isotope ratios were measured by accelerator mass spectrometry. An upper limit for the 53 Mn global flux is established.