Absolute molecular flux and angular distribution measurements to characterize DNA/RNA vapor jets

Abstract Vapor jets of DNA and RNA bases (adenine, cytosine, thymine, and uracil) from an oven with a capillary exit have been studied in the intermediate regime between molecular and viscous flow corresponding to Knudsen numbers in the range 0.1  K n θ ) 3/2 angular dependence in the intermediate regime with error functions associated with the mean free path between intermolecular collisions.