2011/10/27 by Luisa Bonolis, Bonolis, Luisa
Medicine · Physics and Astronomy · #Biofield Effects and Biophysics #FOS: Physical sciences #History and Philosophy of Physics (physics.hist-ph) #Radiation Therapy and Dosimetry #Relativity and Gravitational Theory
paper · pdf · doi:10.48550/arxiv.1110.6206
openalex publication_date 2011/10/27 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Rossi's career paralleled the evolution of cosmic-ray physics. Starting from the early 1930s his pioneering work on the nature and behavior of cosmic rays led to fundamental contributions in the field of experimental cosmic-ray physics and laid the foundation for high-energy particle physics. After the war, under his leadership the Cosmic Ray group at MIT investigated the properties of the primary cosmic rays elucidating the processes involved in their propagation through the atmosphere, and measuring the unstable particles generated in the interactions with matter. When accelerators came to dominate particle physics, Rossi's attention focused on the new opportunities for exploratory investigations made possible by the availability of space vehicles. He initiated a research program which led to the first in situ measurements of the density, speed and direction of the solar wind at the boundary of Earth's magnetosphere and inspired the search for extra-solar X-ray sources resulting in the detection of what revealed to be the most powerful X-ray source in Earth's skies. The discovery of Scorpius X-1 marked the beginning of X-ray astronomy, which soon became a principal tool of astrophysics research.