ИСТИНА

We consider photo induced near threshold nuclear reactions induced by corpuscular emission of laser produced plasma as a diagnostic tool for high energy particles and photons. While for a single particle detection plenty of methods were developed in nuclear physics, laser produced plasma demands new approaches as it emits huge amount of particle in a time much less than the temporal response of standard nuclear techniques. In our study the TW femtosecond Ti:Sa laser was used to create plasma with “temperatures” up to few MeV. We studied gamma and electron emission from this plasma and optimized their yield by introducing an artificial pre-pulse. “Low” threshold gamma-D and gamma-Be photonuclear reactions were studied experimentally. We also consider gamma-gamma reactions (long-lived isomer production) for plasma diagnostics. We present numerical simulations using GEANT 4.0 package supporting our estimates and experimental data.