--- title: "Nuclear Tracks, Sm Isotopes and Neutron Capture Effects in the Elephant Morraine Shergottite • CBPF Index" description: "CBPF INDEX is the system that tracks the scientific and technological output of CBPF. It lists the articles, books, technical reports and other publications of the whole CBPF community." canonical_url: "https://index.cbpf.br/en/publicacoes/6ad2a767639f62b11adbb863" locale: en meta: "og:description": "CBPF INDEX is the system that tracks the scientific and technological output of CBPF. It lists the articles, books, technical reports and other publications of the whole CBPF community." "og:image": "https://index.cbpf.br/_og/d/c_Item%2Ctitulo_~TnVjbGVhciBUcmFja3MsIFNtIElzb3RvcGVzIGFuZCBOZXV0cm9uIENhcHR1cmUgRWZmZWN0cyBpbiB0aGUgRWxlcGhhbnQgTW9ycmFpbmUgU2hlcmdvdHRpdGU%2Ctipo_Physics%2BNote%2Ccor_~I2E4MmMwMA%2Cautores_~Ui5TLiBSYWphbjsgRy4gTHVnbWFpcjsgQS5TLiBUYW1oYW5lOyBHLiBQb3VwZWF1%2Cdetalhe_1985%2Csecao_Publications%2Cp_Ii9lbi9wdWJsaWNhY29lcy82YWQyYTc2NzYzOWY2MmIxMWFkYmI4NjMi%2Cs_1C53LTbvlvDm9-gB.png" "og:image:height": "600" "og:image:type": image/png "og:image:width": "1200" "og:title": "Nuclear Tracks, Sm Isotopes and Neutron Capture Effects in the Elephant Morraine Shergottite • CBPF Index" "twitter:image": "https://index.cbpf.br/_og/d/c_Item%2Ctitulo_~TnVjbGVhciBUcmFja3MsIFNtIElzb3RvcGVzIGFuZCBOZXV0cm9uIENhcHR1cmUgRWZmZWN0cyBpbiB0aGUgRWxlcGhhbnQgTW9ycmFpbmUgU2hlcmdvdHRpdGU%2Ctipo_Physics%2BNote%2Ccor_~I2E4MmMwMA%2Cautores_~Ui5TLiBSYWphbjsgRy4gTHVnbWFpcjsgQS5TLiBUYW1oYW5lOyBHLiBQb3VwZWF1%2Cdetalhe_1985%2Csecao_Publications%2Cp_Ii9lbi9wdWJsaWNhY29lcy82YWQyYTc2NzYzOWY2MmIxMWFkYmI4NjMi%2Cs_1C53LTbvlvDm9-gB.png" --- > Index of every page on this site: [llms.txt](https://index.cbpf.br/llms.txt) **Physics Note****Published** # **Nuclear Tracks, Sm Isotopes and Neutron Capture Effects in the Elephant Morraine Shergottite** **R.S. Rajan; G. Lugmair; A.S. Tamhane; G. Poupeau** 1985 [**Download PDF **0.6 MB](https://index.cbpf.br/files/publicacao/6ad2a767639f62b11adbb863/pdf) [**Contact owner**](mailto:apub@cbpf.br?subject=Nuclear%20Tracks%2C%20Sm%20Isotopes%20and%20Neutron%20Capture%20Effects%20in%20the%20Elephant%20Morraine%20Shergottite) ## **Publication details**
Authors
R.S. Rajan; G. Lugmair; A.S. Tamhane; G. Poupeau
Type
Physics Note
Status
Published
Publication date
1985
Description
Nuclear track studies, uranium concentration measurements and Sm-isotope studies have been performed on both lithologies A and B of the Elephant Morraine Shergottite, EETA 79001 Track studies show that EETA 79001 was a rather small object in space with a preatmospheric radius of 12 <math>\pm</math> 2 cm,.corresponding to a preatmospheric mass of 28 <math>\pm</math> 13 kg. U-concentrations measurements indicate that phosphates have concentrations ranging from 0.3 to 1.3 ppm. There are occasional phosphates with excess fission tracks:, possibly produced from neutron induced fission of U and Th. during the regolith exposure in the shergottite parent body (SPB). Sm-isotope studies, while not showing any clear cut excess in <math>^{150}Sm</math>, enable us to derive meaningful upper limits to thermal neutron fluences of 2 to <math>3 \times 10^{15}n/cm^2\,\!</math> , during a possible regolith irradiation. 'These limits are consistent writh.that required to explain the track data and also enable us to derive an upper limit to the neutron exposure age of EETA 79001. of 55 Myr in the SPB regolith.
Year
1985
Number
CBPF-NF-083/85
Linked to a thesis
No
Linked to a grant
No
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