Total charge-changing and partial cross-section measurements in the reactions of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>∼</mml:mi><mml:mn>110</mml:mn><mml:mo>–</mml:mo><mml:mn>250</mml:mn><mml:mi> </mml:mi><mml:mi mathvariant="normal">M</mml:mi><mml:mi mathvariant="normal">e</mml:mi><mml:mi mathvariant="normal">V</mml:mi><mml:mo>/</mml:mo><mml:mi mathvariant="normal">n</mml:mi><mml:mi mathvariant="normal">u</mml:mi><mml:mi mathvariant="normal">c</mml:mi><mml:mi mathvariant="normal">l</mml:mi><mml:mi mathvariant="normal">e</mml:mi><mml:mi mathvariant="normal">o</mml:mi><mml:mi mathvariant="normal">n</mml:mi><mml:mrow><mml:msup><mml:mrow><mml:mi> </mml:mi></mml:mrow><mml:mrow><mml:mn>12</mml:mn></mml:mrow></mml:msup></mml:mrow><mml:mi mathvariant="normal">C</mml:mi></mml:math>in carbon, paraffin, and water

Total charge-changing cross sections and cross sections for the production of B and Be fragments were directly measured for reactions induced by $\ensuremath{\sim}110--250 \mathrm{M}\mathrm{e}\mathrm{V}/\mathrm{n}\mathrm{u}\mathrm{c}\mathrm{l}\mathrm{e}\mathrm{o}\mathrm{n}{ }^{12}\mathrm{C}$ ions in C, ${\mathrm{CH}}_{2},$ and ${\mathrm{H}}_{2}\mathrm{O}$ targets. Etched track detector (CR-3) was used, together with an automatic track measuring system and a track matching algorithm, to count and to identify the primary and secondary particles. A comparison of the present data and of previously measured cross sections with model predictions is carried out. For the total charge-changing cross section, a model developed at NASA gives the best agreement with the present results (about 3% on the average). However, for the production of fragments, the results of models deviate on average for all systems studied by 9--58 % from the data presented in this work for $Z=5$ and by 5--47 % for $Z=4.$ The model known as NUCFRG2 is the most reliable in giving the closest values for fragmentation cross sections, 9 and 5% for B and Be fragments, respectively, for the systems studied in this work.