L. A. Zotti,1 M. Bürkle,2 Y. J. Dappe,3 F. Pauly,2 and J. C. Cuevas1 1Departamento de Fı́sica Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain 2Institut für Theoretische Festkörperphysik and DFG Center for Functional Nanostructures, Karlsruhe Institute of Technology (KIT), D-76131 Karlsruhe, Germany 3Institut de Physique et Chimie des Matériaux de Strasbour...

We demonstrate that 3 keV ion beams, formed from the common noble gasses, He, Ne, Ar, Kr, and Xe, can controllably "sculpt" nanometer scale pores in silicon nitride films. Single nanometer control of structural dimensions in nanopores can be achieved with all ion species despite a very wide range of sputtering yields and surface energy depositions. Heavy ions shrink pores more efficiently and m...

I sn't that title just a piece of nonsense designed to catch your attention? Why should you breathe in the inert noble gas knowing that you need oxygen instead? Maybe an aging singer could mix some helium to his breath when his voice does not meet the high notes anyrnore. Of course, divers exchange nitrogen with helium since even under pressure it hardly dissolves in the blood and hence averts ...

Hara and Massey [1] have investigated the annihilation of positrons in Ar-CO mixtures while the present author studied the behaviour of positrons in the noble gas mixtures (Ne + Ar) [2] and (He-)-Ar) [3]. It has been found that the annihilation decay constant, A, depends quite sensitively on the nature of the gas mixture. Our calculations [3] indicate that it will be quite interesting to explor...

INTRODUCTION We are developing a new diagnostic technology: magnetic resonance imaging (MRI) and spectroscopy of hyperpolarized noble gases. Large non-equilibrium nuclear spin polarizations can be created in the spin-1/2 noble gases, He and Xe, using the technique of spin-exchange optical pumping. Such large polarizations greatly enhance the magnetic resonance detection of He and Xe, enabling h...

Spin-exchange optical pumping of mixtures of alkali-metal vapors and noble gases can be used to efficiently polarize the nuclei of the noble-gas atoms. Liters of noble gases at standard temperature and pressure and with nuclear spin polarizations of several tens of percent are now used in many applications. The authors describe the basic phenomena that govern the spin-exchange process and revie...