Ollano published research papers on their work in journals including Zeitschrift für Physik and Nature that "became popular at an international level.
"[2] In 1933, Ollano carried out a series of experiments relating to the radiation absorption properties of beryllium, for which she enlisted the help of physicist Franco Rasetti, who also supplied her with the polonium preparation she used in her laboratory.
Subsequent researches led to the experimental demonstration of the existence of the hydronium ion (H 3 O + ) in aqueous solution, obtained by molecular analysis in Raman spectroscopy (1933); the proof was published, as well in the Nuovo Cimento, also on the Zeitschrift für Physik and undoubtedly constitutes Ollano's first notable discovery, as well as an important step towards understanding the physics of water, which is still incomplete.
They published their results between 1941 and 1942 in Scientific Research and Reports of the Royal Lombard Institute of Sciences and Letters, but these were the last joint publications by Ollano and Brunetti, who died at age 52 on 28 June 1942.
[2] Ollano remained at the University of Pavia after Brunetti's death and succeeded her to become the chair of experimental physics "but only by appointment;" she stayed there until 1943.