Berlin 2014 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

A: Fachverband Atomphysik

A 21: Precision spectroscopy of atoms and ions III (with Q)

A 21.5: Vortrag

Dienstag, 18. März 2014, 15:00–15:15, BEBEL SR140/142

Long storage times for hyperpolarized 129Xe and precise measurement of its absolute polarization — •Maricel Repetto, Stefan Zimmer, Sergei Karpuk, Peter Blümler, and Werner Heil — Johannes Gutenberg Universität, Institut für Physik. Staudingerweg 7 55099, Mainz, Deutschland

Applications of hyperpolarized (HP) 129Xe in medical research and fundamental physics experiments increased significantly in recent years [1, 2]. All uses profit from high degrees of polarization (PXe) which not only needs to be generated but also preserved during transport and storage. PXe is usually determined via comparison of the NMR signals from HP Xe with the NMR signal of thermally polarized H2O or Xe [3]. All these procedures have experimental errors which are hard to eliminate [4]. We present a simple method for the measurement of absolute PXe which best resolution is 0.6 % together with wall storage times > 12 hs using a homebuilt, mobile Xe polarizer.

[1] S. Patz Eur. Jour. Of Rad. 64 (2007) 335-344. [2] K. Tullney Phys Rev. Let. 111, (2013) 100801. [3] G. Schrank. Xenon Polarizer Characterization and Biological Studies. 2009. (Page 27). [4] E.Wilms. Nuc. Ins. And Meth. in Phys Res. A 401 (1997) 491-498.