1. National Institute of Standards and Technology, Gaithersburg, Maryland 20899, USA
2. Department of Chemistry and Biochemistry, University of Maryland, College Park, Maryland 20742, USA
3. Joint Quantum Institute, University of Maryland, College Park, Maryland 20742, USA
4. Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, ulica Grudziadzka 5, 87-100 Toruń, Poland