Arid
DOI10.1111/j.1945-5100.2010.01135.x
Cosmogenic radioisotopes in the Almahata Sitta ureilite
Taricco, Carla1,2; Bhandari, Narendra3; Colombetti, Paolo1,2; Romero, Alberto2; Vivaldo, Gianna2; Sinha, Neeharika4; Jenniskens, Peter5; Shaddad, Muawia H.6; Ballabh, G. M.7
通讯作者Taricco, Carla
来源期刊METEORITICS & PLANETARY SCIENCE
ISSN1086-9379
EISSN1945-5100
出版年2010
卷号45期号:10-11页码:1743-1750
英文摘要

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.


类型Article
语种英语
国家Italy ; India ; USA ; Sudan
收录类别SCI-E
WOS记录号WOS:000285759700012
WOS关键词EXPERIMENTAL SET-UP ; PRODUCTION-RATES ; RADIONUCLIDES ; METEORITES ; NUCLIDES ; TORINO ; FALL
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/165658
作者单位1.Univ Turin, Dipartimento Fis Gen, Via Pietro Giuria 1, I-10125 Turin, Italy;
2.INAF, IFSI, Turin, Italy;
3.Basic Sci Res Inst, Ahmadabad 380009, Gujarat, India;
4.Indian Inst Astrophys, Bangalore 560034, Karnataka, India;
5.Carl Sagan Ctr, SETI Inst, Mountain View, CA 94043 USA;
6.Univ Khartoum, Dept Phys & Astron, Khartoum 11115, Sudan;
7.Osmania Univ, Ctr Adv Study Astron, Hyderabad 500007, Andhra Pradesh, India
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Taricco, Carla,Bhandari, Narendra,Colombetti, Paolo,et al. Cosmogenic radioisotopes in the Almahata Sitta ureilite[J],2010,45(10-11):1743-1750.
APA Taricco, Carla.,Bhandari, Narendra.,Colombetti, Paolo.,Romero, Alberto.,Vivaldo, Gianna.,...&Ballabh, G. M..(2010).Cosmogenic radioisotopes in the Almahata Sitta ureilite.METEORITICS & PLANETARY SCIENCE,45(10-11),1743-1750.
MLA Taricco, Carla,et al."Cosmogenic radioisotopes in the Almahata Sitta ureilite".METEORITICS & PLANETARY SCIENCE 45.10-11(2010):1743-1750.
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