pravdivtseva photo

Olga Pravdivtseva

Titles
Research Associate Professor

Office Contact Information

Degrees
Ph.D.
Office
458 Compton
Mailbox

Physics Department, CB 1105
Washington University
One Brookings Drive
St. Louis, MO 63130-4899, USA

Phone
(314) 935-5049
Fax
(314) 935-6219

Research Interests

Dr. Pravdivtseva research focus has been in the formation and evolution of the early solar system. She is involved in high-precision noble gas mass-spectrometric study of extraterrestrial materials and uses noble gas isotopes as tracers of nuclear processes occurred in the nascent solar system.

Dr. Pravdivtseva is most heavily involved in I-Xe dating of early solar system events recorded and preserved by various meteoritic components. The I-Xe chronometer is based upon the decay of now-extinct 129I, produced in r-process nucleosynthesis in supernovae, and is capable of providing high precision closure ages, often within 10,000 years, of minerals that formed 4,600,000,000 years ago. High temporal resolution of I-Xe chronometer allows deciphering details of aqueous alteration and thermal metamorphism in various meteoritic components and mineral phases, estimating the cooling rates of iron meteorites, and as a result, reconstructing evolution of the meteorites parent bodies.

Selected Recent Publications

  • I-Xe dating of aqueous alteration in the CI chondrite Orgueil: I. Magnetite and ferromagnetic separates. O. Pravdivtseva, A. N. Krot, and C. M. Hohenberg. Geochimica et Cosmochimica Acta 227, 38‒47 (2018).
  • Noble gas composition, cosmic ray exposure age, 39Ar-40Ar and I-Xe analyses of ungrouped achondrite NWA 7325. J. Hopp, N. Schröter, O. Pravdivtseva, H-P. Meyer, M. Trieloff, U. Ott. Meteoritics and Planetary Science, doi: 10.1111/maps.13062 (2018).
  • I-Xe systematics of the impact plume produced chondrules from the CB carbonaceous chondrites: Implications for the half-life value of 129I and absolute age normalization of 129I-129Xe chronometer. O. Pravdivtseva, A. Meshik, C. M. Hohenberg. Geochimica et Cosmochimica Acta 201, 320‒330 (2017).
  • Evaporative fractionation of zinc during the first nuclear detonation. J. M. D. Day, F. Moynier, A. P. Meshik, O. V. Pravdivtseva, D. R. Petit. Science Advances 3, e1602668 (2017).
  • Evaluation of the 129I half-life value through analyses of primitive meteorites. O. Pravdivtseva, A. Meshik, and C. M. Hohenberg. Proc. 14th Int. Symp. On Nuclei in the Cosmos (NIC2016), JPS Conf. Proc.14, 011005-1‒020702-4 (2017).
  • New evidence for Chemical Fractionation of radioactive Xe precursors in fission chains. A. P. Meshik, O. V. Pravdivtseva, and C. M. Hohenberg. Physical Review С 93, 0044614-1‒044614-9 (2016).