Absorption Coefficients for Homogeneous X-Rays

Absorption Coefficients of Various Organic Liquids for X-rays of Wave-length 0.715 Å.—By means of a spectrometer with narrow lead slits and a calcite crystal, the ${\mathrm{K}}_{\alpha }$ radiation from the Mo target of a Coolidge tube was reflected into an ionization chamber, and the effect of interposing a cell containing a known thickness of liquid before the first slit, was measured. Thus absorption coefficients were determined for carefully purified samples of pinene (${\mathrm{C}}_{10}$ ${\mathrm{H}}_{16}$), limonene (${\mathrm{C}}_{10}$ ${\mathrm{H}}_{16}$), benzene (${\mathrm{C}}_6$ ${\mathrm{H}}_6$), toluol (${\mathrm{C}}_7$ ${\mathrm{H}}_8$), isopropyl alcohol (${\mathrm{C}}_3$ ${\mathrm{H}}_8$O), methyl proprionate (${\mathrm{C}}_4$ ${\mathrm{H}}_8$ ${\mathrm{O}}_2$), ethyl acetate (${\mathrm{C}}_4$ ${\mathrm{H}}_8$ ${\mathrm{O}}_2$), acetone (${\mathrm{C}}_3$ ${\mathrm{H}}_6$O), ethyl formate (${\mathrm{C}}_3$ ${\mathrm{H}}_6$ ${\mathrm{O}}_2$) and trimethylene glycol (${\mathrm{C}}_3$ ${\mathrm{H}}_3$ ${\mathrm{O}}_2$).