eprintid: 2360
rev_number: 8
eprint_status: archive
userid: 70
dir: disk0/00/00/23/60
datestamp: 2014-11-10 13:11:37
lastmod: 2015-03-25 09:16:39
status_changed: 2014-11-10 13:11:37
type: article
metadata_visibility: show
creators_name: Taricco, Carla
creators_name: Bhandari, Narendra
creators_name: Colombetti, Paolo
creators_name: Romero, Alberto
creators_name: Vivaldo, Gianna
creators_name: Sinha, Neeharika
creators_name: Jenniskens, Peter
creators_name: Shaddad, Muawia H.
creators_name: Ballabh, G. M.
creators_id: 
creators_id: 
creators_id: 
creators_id: 
creators_id: gianna.vivaldo@imtlucca.it
creators_id: 
creators_id: 
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creators_id: 
title: Cosmogenic radioisotopes in the Almahata Sitta ureilite
ispublished: pub
subjects: QB
subjects: QC
divisions: EIC
full_text_status: none
abstract: Asteroid 2008 TC3 was predicted to fall in Sudan on October 7, 2008, and 2 months later, 15 meteorite fragments were recovered from the Nubian Desert. Most of these fragments were classified as polymict ureilites. In the largest ureilitic fragment #15, weighing 75 g, we have measured six gamma emitting radionuclides (46Sc, 57Co, 54Mn, 22Na, 60Co, and 26Al) by nondestructive whole rock counting using a sensitive gamma-ray spectrometer. The activities of 60Co, produced mainly by neutron capture in cobalt, and 26Al indicate that fragment #15 was located at a depth of 41 ± 14 cm inside the 1.5–2 m radius asteroid. The activity of other radionuclides is also consistent with this shielding depth within the asteroid. The 22Na/26Al activity ratio is higher than expected for the average cosmic ray flux, probably due to the unusually prolonged solar minimum before the fall.
date: 2010-11
date_type: published
publication: Meteoritics and Planetary Science
volume: 45
number: 10-11
publisher: Wiley
pagerange: 1743-1750
id_number: 10.1111/j.1945-5100.2010.01135.x
refereed: TRUE
issn: 1086-9379
official_url: http://dx.doi.org/10.1111/j.1945-5100.2010.01135.x
citation:   Taricco, Carla and Bhandari, Narendra and Colombetti, Paolo and Romero, Alberto and Vivaldo, Gianna and Sinha, Neeharika and Jenniskens, Peter and Shaddad, Muawia H. and Ballabh, G. M.  Cosmogenic radioisotopes in the Almahata Sitta ureilite.  Meteoritics and Planetary Science, 45 (10-11).  pp. 1743-1750.  ISSN 1086-9379      (2010)