Articles you may be interested inThe rotational spectrum and molecular structure of the argon-carbonyl fluoride complexThe complete electronic spectrum of carbonyl fluoride has been observed for the first time down to 1215 A. At least four electronic transitions occur in this spectral region. The first three electronic transitions are associated with elaborate vibrational structures, which are analyzed. The transitions are interpreted as two n-.".* types and one n->u* type. A ".->".* type transition is found at shorter wavelengths. Other unresolved transitions occur at still shorter wavelengths where the intensity increases continuously to the limit of observation. The ionization potential of carbonyl fluoride has been determined by electron impact in a mass spectrometer as 13.17±O.l eV.

The effects of gravity on the crystal nucleation of heavy metal fluoride fibers have been studied in preliminary experiments utilizing NASA's KC-135 reduced gravity aircraft and a microgravity sounding rocket flight. Commercially produced fibers were heated to the crystallization temperature in normal and reduced gravity. The fibers processed in normal gravity showed complete crystallization while the fibers processed in reduced gravity did not show signs of crystallization.

The effects of gravity on the crystallization of ZrF(4)-BaF(2)-LaF(3)-AlF(3)-NaF glasses have been studied using the NASA KC-135 and a sounding rocket. Fibers and cylinders of ZBLAN glass were heated to the crystallization temperature in unit and reduced gravity. When processed in unit gravity the glass crystallized, but when processed in reduced gravity, crystallization was suppressed. A possible explanation involving shear thinning is presented to explain these results.

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