Quantum-state-controlled reactions between molecular radicals and ions

Author
Abstract
<p>hemical reactions between ions and molecular radicals are important in both terrestrial and extraterrestrial environments. However, due to the challenge of creating dense, pure samples of both species, very few studies have been performed in the laboratory. We present the first measurement of a state-controlled reaction between a radical and an ion, where the\&nbsp;Ca+\&nbsp;cation and the NO radical molecule combine to form\&nbsp;CaO+\&nbsp;and a nitrogen atom. The charge transfer between\&nbsp;Ca+\&nbsp;and NO is simultaneously observed. We utilize a linear Paul ion trap coupled to a time-of-flight mass spectrometer to make direct, simultaneous measurements of multiple ionic product channels. We demonstrate control over the reaction rates by tuning of the excited-state population of the laser cooled\&nbsp;40Ca+. This control, coupled with a sensitive detection technique, enables precise measurement of the rate constants and branching ratios for this reaction.</p>
Year of Publication
2018
Journal
Physical Review A
Volume
98162
Date Published
2018-09
ISSN Number
2469-9926
URL
http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevA.98.032702/fulltexthttps://link.aps.org/article/10.1103/PhysRevA.98.032702
DOI
10.1103/PhysRevA.98.032702
JILA PI
Journal Article