This book presents the first comprehensive compilation and review of the extensive body of experimental and theoretical material on solar neutrons and related phenomena published in the scientific literature over the last sixty years. Phenomena related to solar neutrons are more specifically:

Interactions of Charged, Accelerated Particles in the Solar Atmosphere, and the Generation of Secondary Energetic Particles and Radiation: Pioneer Results.- The Events of August 1972 and the Discovery of Solar Gamma-Radiation.- The Events of June 1980 and June 1982, and the Discovery of Solar Neutrons.- Space Probe Observations of Solar Neutron and Gamma Ray Events.- Solar Neutron Propagation in the Earth's Atmosphere, and the Sensitivity of Neutron Monitors and Other Ground Based Detectors to Solar Neutrons.- Statistical Investigations of Solar Neutron Events on the Basis of Ground Observations.- Observations of Solar Neutron Events by Ground Based Detectors, and Their Interpretation.- The Solar Neutron Decay Phenomenon.- Gamma Rays from Solar Energetic Particle Interactions with the Sun's Atmosphere.- Positron Generation in the Nuclear Interactions of Flare Energetic Particles in the Solar Atmosphere.- The Development of Models and Simulations for Solar Neutron and Gamma Ray Events.