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• W2963939860 abstract "Studying chemical reactions on a state-to-state level tests and improves our fundamental understanding of chemical processes. For such investigations it is convenient to make use of ultracold atomic and molecular reactants as they can be prepared in well defined internal and external quantum states$^{1-4}$. In general, even cold reactions have many possible final product states$^{5-15}$ and reaction channels are therefore hard to track individually$^{16}$. In special cases, however, only a single reaction channel is essentially participating, as observed e.g. in the recombination of two atoms forming a Feshbach molecule$^{17-19}$ or in atom-Feshbach molecule exchange reactions$^{20,21}$. Here, we investigate a single-channel reaction of two Li$_2$-Feshbach molecules where one of the molecules dissociates into two atoms $2mathrm{AB}Rightarrow mathrm{AB}+mathrm{A}+mathrm{B}$. The process is a prototype for a class of four-body collisions where two reactants produce three product particles. We measure the collisional dissociation rate constant of this process as a function of collision energy/ temperature and scattering length. We confirm an Arrhenius-law dependence on the collision energy, an $a^4$ power-law dependence on the scattering length $a$ and determine a universal four body reaction constant." @default.
• W2963939860 created "2019-07-30" @default.
• W2963939860 creator A5011005725 @default.
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• W2963939860 date "2018-12-07" @default.
• W2963939860 modified "2023-10-12" @default.
• W2963939860 title "Reaction kinetics of ultracold molecule-molecule collisions" @default.
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• W2963939860 doi "https://doi.org/10.1038/s41467-018-07576-1" @default.
• W2963939860 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6286306" @default.
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• W2963939860 hasPublicationYear "2018" @default.
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