title: In situ x-ray diffraction measurements of the capillary fountain jet produced via ultrasonic atomization.
abstract: In situ x-ray diffraction measurements were carried out for investigating the liquid structure in the ultrasonic fountain jet to consider the mechanism of the "ultrasonic ethanol separation" reported by Sato et al. [J. Chem. Phys. 114, 2382 (2001)]. For pure liquids (water and ethanol), it was found that the high frequency ultrasound does not affect the liquid structure microscopically. For the 20 mol % ethanol-water mixture, the estimated ethanol mole fraction in the ultrasonic fountain jet by using the position of the main maximum in the x-ray diffraction profile coincided with that in the reservoir. This result suggests that the ethanol separation is not caused by any distorted liquid structure under the ultrasound irradiation and occurs when or after the generation of the liquid droplet mist.
authors.affiliation: Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan. y-yano@fc.ritsumei.ac.jp
authors.forename: Yohko F
authors.initials: YF
authors.lastname: Yano
authors.forename: Junya
authors.initials: J
authors.lastname: Douguchi
authors.forename: Atsushi
authors.initials: A
authors.lastname: Kumagai
authors.forename: Takao
authors.initials: T
authors.lastname: Iijima
authors.forename: Yukinobu
authors.initials: Y
authors.lastname: Tomida
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Miyamoto
authors.forename: Kazuo
authors.initials: K
authors.lastname: Matsuura