This report summarizes some useful data on the transport characteristics of gas mixtures which are required for detection of charged particles in gas detectors. The requirements for high luminosity tracking are stringent and different at low and high momenta, representing a compromise between a fast gas mixture, small diffusion properties and having a small Lorentz angle, but high primary ioniz...

Absolute measurements are presented for the positron-impact cross sections for direct ionization and positronium formation of noble gas atoms in the range of energies from threshold to 90 eV. The experiment uses a cold, trap-based positron beam and the technique of studying positron scattering in a strong magnetic field. The current data show generally good, quantitative agreement with previous...

Owning to their unparalleled sensitivity resolution, nanomechanical resonators have excellent capabilities in design of nano-sensors for gas detection. The current challenge is to develop newdesigns of the resonators for differentiating distinct gas atoms with a recognizably high sensitivity. In this work, the characteristics of impulse wave propagation in carbon nanotube-based sensors are inve...

Motivated by exciting, but puzzling, noble gas results in terrestrial diamonds (e.g. high He/He ratios close to the solar value from industrial class diamonds [Ozima et al., 1983] and low 40ArPAr [ = 189] from an Arkansas, U.S.A., diamond [Melton and Giardini, 1980]), we undertook the study of noble gases in diamonds from different locations. Although this is ongoing research, we can report pre...

The onset of antiprotonic X–ray transitions at high principal quantum numbers and the occurence of electronic X–rays in antiprotonic argon, krypton, and xenon has been analyzed with the help of Multiconfiguration Dirac–Fock calculations. The shell–by–shell ionisation by Auger electron emission, characterised by appearance and disappearance of X–ray lines, is followed through the antiprotonic ca...

Introduction. The presence of terrestrial atmospheric noble gases in lunar samples has been known since the early analyses of lunar samples delivered by the Apollo program [1-4]. Some lunar samples contain trapped gases with clear terrestrial atmosphere Xe isotopic signatures [3, 4]. As a part of the sample preparation procedure some of them have been crushed before analyses. Therefore, it was ...

The field of medical imaging with polarized rare gases, just five years old, has brought optical scientists together with medical researchers to perfect techniques and pursue new opportunities for biomedical research. This review, written for the likely reader of these volumes, aims to present the field from several perspectives. The historical perspective shows how applications of nuclear pola...

We review the inventories of primordial noble gases and nitrogen in meteorites, their carrier phases, how and where they may have been incorporated, as well as processes modifying their abundances on meteorite parent bodies. Some of the many distinct noble gas and nitrogen components have an isotopic composition very different from that in the Sun. These components reside in presolar grains. “A...

We describe the isolation and spectroscopic characterization of the heavier phosphorus-containing analogue of isocyanic acid (HPCO), and its isotopologue (DPCO). This fundamental small molecule, which has been postulated to exist in interstellar space, has thus far only been observed at low gas phase concentrations or in inert gas matrices. In this report we describe its synthesis, spectroscopi...