Preparation, isolation, storage, and spectroscopic characterization of water vapor enriched in the ortho-H2O nuclear spin isomer

Elina Lisitsin, Chemistry, Technion, Haifa, Israel


Using magnetic focusing in a supersonic jet, a beam of “normal” H2O molecules seeded in a krypton carrier gas is shown to provide a source of water molecules that is highly enhanced in the ortho-H2O (o-H2O) nuclear spin isomer over the high-temperature equilibrium 3:1 ortho:para ratio. Water from the magnetically focused beam is then isolated and stored within a Kr matrix at 13 K whereby the amplitude and lifetime of this strong nuclear spin polarization are quantified spectroscopically. Attempts to store the polarization in a colder Kr matrix reveal complex nuclear spin conversion processes.



 



References:




  1. Pardanaud, C. 2007, PhD thesis, Université Pierre et Marie Curie-Paris


  2. T. Kravchuk, M. Reznikov, P. Tichonov, N. Avidor, Y. Meir, A. Bekkerman and G. Alexandrowicz, Science, 331, 319 (2011)


  3. P.-A. Turgeon, P. Ayotte, E. Lisitsin, Y. Meir, T. Kravchuk, and G. Alexandrowicz, Phys. Rev. A 86, 062710 (2012)


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