Starting in 1952 in Italy, a series of international balloon flights were conducted to study elementary particles, which culminated in 1954 with the launch of a large nuclear emulsion package, the "giant" stack ). The emulsion plates, exposed at altitudes of about 30,000 meters, were able to record complete traces of decontamination products of meson K (or kaoni), allowing a systematic study, following the emergence of pressing questions within the scientific community . The flight, organized by the universities of Bristol, Milan and Padua, took place on 12 October 1954 from Novi Ligure and produced important results, mainly exhibited at the Pisa Conference in June 1955. Notemodify wikitesto

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