277 citations · 305 across the 6 of their papers we have counts for
6 papers
High Resolution Spectroscopy of Neutral Yb Atoms in a Solid Ne Matrix
R. Lambo, C. -Y. Xu, S. T. Pratt +11
We present an experimental and theoretical study of the absorption and emission spectra of Yb atoms in a solid Ne matrix at a resolution of 0.025 nm. Five absorption bands were ide…
Rapid processing of 85Kr/Kr ratios using Atom Trap Trace Analysis
J. C. Zappala, K. Bailey, P. Mueller +2
We report a methodology for measuring 85Kr/Kr isotopic abundances using Atom Trap Trace Analysis (ATTA) that increases sample measurement throughput by over an order of magnitude t…
Setting a Limit on Anthropogenic Sources of Atmospheric 81Kr through Atom Trap Trace Analysis
J. C. Zappala, K. Bailey, W. Jiang +4
We place a 2.5% limit on the anthropogenic contribution to the modern abundance of 81Kr/Kr in the atmosphere at the 90% confidence level. Due to its simple production and transport…
First Measurement of the Atomic Electric Dipole Moment of Ra
R. H. Parker, M. R. Dietrich, M. R. Kalita +10
The radioactive radium-225 (Ra) atom is a favorable case to search for a permanent electric dipole moment (EDM). Due to its strong nuclear octupole deformation and large at…
One million year old groundwater in the Sahara revealed by krypton-81 and chlorine-36
N. C. Sturchio, X. Du, R. Purtschert +15
Measurements of 81Kr/Kr in deep groundwater from the Nubian Aquifer (Egypt) were performed by a new laser-based atom-counting method. 81Kr ages range from \~2x10^5 to ~1x10^6 yr, c…
Laser Spectroscopic Measurement of Helium Isotope Ratios
L. -B. Wang, P. Mueller, R. J. Holt +4
A sensitive laser spectroscopic method has been applied to the quantitative determination of the isotope ratio of helium at the level of 3He/4He = 10^-7 - 10^-5. The resonant absor…