Contribution of neutron-capture reactions to observed tungsten isotopic ratios

Earth and Planetary Science Letters

Volumn 152, Issue 1-4, 1997, Pages 181-185

  Masarik, Jozef ^a,b  

^a SWISS FEDERAL INSTITUTE OF AQUATIC SCIENCE AND TECHNOLOGY   (Switzerland)

^b Faculty of Natural Sciences   (Slovakia)

Author keywords

Iron meteorites; Isotope ratios; Neutrons; Tungsten

Indexed keywords

IRON METEORITE; ISOTOPIC COMPOSITION; NEUTRON CAPTURE; TUNGSTEN;

EID: 0031405020     PISSN: 0012821X     EISSN: None     Source Type: Journal    
DOI: 10.1016/s0012-821x(97)00151-9     Document Type: Article

References (19)

1. 182Hf in the early solar system and constraints on the timescale of terrestrial accretion and core formation, Geochim. Cosmochim. Acta 60 (1996) 1131-1153.
2. C.L. Harper Jr., Astrophysical site of the origin of the solar system inferred from extinct radionuclide abundances, Astrophys. J. 466 (1996) 1026-1038.
3. H.E. Newsom, K.W.W. Sims, P.D. Noll, W.I. Jaeger, S.A. Maehr, T.B. Beserra, The depletion of tungsten in the bulk silicate Earth: Constraints on core formation, Geochim. Cosmochim. Acta 60 (1996) 1155-1169.
4. D.C. Lee, A.N. Halliday, Hafnium-tungsten chronometry and the timing of terrestrial core formation, Nature 378 (1995) 771-774.
5. A. Halliday, M. Rehkämper, D.-Ch. Lee, W. Yi, Early evolution of the earth and moon: New constraints from Hf-W isotope geochemistry, Earth Planet. Sci. Lett. 142 (1996) 75-89.
6. S.B. Jacobsen, C.L. Harper Jr., Accretion and early differentiation history of the earth based on extinct radionuclides, in: A.R. Basu, S.R. Hart (Eds.), Earth Processes: Reading the Isotopic Code, AGU, Washington DC, 1996, pp. 47-74.
7. J. Masarik, R.C. Reedy, Rates for neutron-capture reactions on tungsten isotopes in iron meteorites (abstract), Meteoritics 29 (1994) 497-498.
8. R.E. Prael, H. Lichtenstein, User guide to LCS: The LAHET Code System, Los Alamos Natl. Lab. Rept., LA-UR-89-3014, 1989, 76 pp.
9. J.F. Briesmeister, MCNP - A general Monte Carlo N-Particle transport code, Version 4A, Los Alamos Natl. Lab. Rept., LA-12625-M, 1993, 693 pp.
10. J. Masarik, R.C. Reedy, Effects of bulk chemical composition on nuclide production processes in meteorites, Geochim. Cosmochim. Acta 58 (1994) 5307-5317.
11. R.C. Reedy, J. Masarik, K. Nishiizumi, J.R. Arnold, R.C. Finkel, M.W. Caffee, J. Southon, A.J.T. Jull, D.J. Donahue, Cosmogenic radionuclide profiles in Knyahinya: new measurements and models, Lunar Planet. Sci. 24 (1993) 1195-1196.
12. 36Cl depth profiles in the Canyon Diablo meteorite, J. Geophys. Res. 99 (1994) 23187-23194.
13. J. Masarik, R.C. Reedy, Low-energy neutron fluxes and reaction products in the lunar surface, Lunar Planet. Sci. 26 (1995) 899-900.
14. 41Ca in an Apollo 15 drill core and the low-energy neutron flux in the Moon, Earth Planet. Sci. Lett. (in press).
15. J. Masarik, R.C. Reedy, Gamma ray production and transport in Mars, J. Geophys. Res. 101 (1996) 18891-18912.
16. G.C. Castagnoli, D. Lal, Solar modulation effects in terrestrial production of carbon 14, Radiocarbon 22 (1980) 133-158.
17. R.C. Reedy, Solar proton fluxes since 195.6, Proc. Lunar Sci. Conf. 8 (1977) 825-839.
18. S.F. Mughabghab, Neutron Cross Sections, Vol. 1, Part B, Z = 61-100, Academic Press, New York, 1984, 435 pp.
19. C.T. Chang, H. Wänke, Beryllium-10 in iron meteorites, their cosmic ray exposure and terrestrial ages, in: P.M. Millman (Ed.), Meteorite Research, D. Reidel, London, 1969, pp. 397-406.