Neutrino astrophysics, nuclear physics, and particle physics at intense, pulsed, stopped-pion sources

Intense pulsed proton beams of ∼ 1 GeV impinging on high-Z targets are intense sources of νμ from the (τ=26 ns) decay of π+, and \(\bar \nu _\mu \) and νe from the stopped μ+ decays. A pulse structure, narrow in time, allows the separation of reactions due to νμ from those from reactions involving \(\bar \nu _\mu\) and νe. The energy spectra are in the energy range of interest to nuclear astrophysics. A number of possible experiments relevant to solar neutrinos, supernovae collapse, weak interactions in nuclei, and intrinsic properties of neutrinos are discussed.