Krypton refers to a chemical element represented by the symbol "Kr" in the periodic table. It is a colorless and odorless gas that is found in very small amounts in the Earth's atmosphere. Full definition
They aimed an attosecond pulse and a longer pulse of red light into a gas of krypton atoms. (discovermagazine.com)
The team worked with researchers at Pacific Northwest National Laboratory, the University of Washington, the University of California at Santa Barbara (UCSB), and elsewhere to record the activity of more than 100,000 individual electrons in krypton gas. (sciencedaily.com)
By creating the first optical attosecond pulse and using it to set electrons in krypton atoms in motion, they discovered that it takes as long as 100 attoseconds for electrons to respond to the electromagnetic forces of light. (sciencedaily.com)