CONTRIBUTION OF NEUTRON-CAPTURE REACTIONS TO OBSERVED TUNGSTEN ISOTOPIC RATIOS

dc.contributor.author	Masarik J.
dc.date.accessioned	2020-12-15T04:58:26Z
dc.date.available	2020-12-15T04:58:26Z
dc.date.issued	1997
dc.identifier	https://elibrary.ru/item.asp?id=268935
dc.identifier.citation	Earth and Planetary Science Letters, 1997, , 1, 181-185
dc.identifier.issn	0012-821X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/20813
dc.description.abstract	To study whether tungsten isotopic ratios observed in terrestrial samples relative to W ratios in an iron meteorite could be made by neutron-capture reactions in the iron meteorite, the fluxes of thermal and epithermal neutrons in a large iron meteoroid, Toluca, were calculated using Monte Carlo particle production and transport codes. Peak neutron-capture rates on W isotopes were calculated to occur at depths of 30-34 cm. The calculated changes in the 182W/183W due to neutrons are much less than those observed in terrestrial samples relative to iron meteorites, indicating a non-cosmogenic origin of the observed W isotopic ratios.
dc.subject	TUNGSTEN
dc.subject	IRON METEORITES
dc.subject	ISOTOPE RATIOS
dc.subject	NEUTRONS
dc.title	CONTRIBUTION OF NEUTRON-CAPTURE REACTIONS TO OBSERVED TUNGSTEN ISOTOPIC RATIOS
dc.type	Статья

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