Measurements of Nuclear Deexcitation Times down to1019sec Using Crystal Blocking ofO16on Diamond

Abstract
The crystal-blocking technique was used to measure the deexcitation times of the evaporation residues of 120-MeV O16 on C12, emerging along the 110 axis of a 12-μm-thick diamond crystal. The extracted times ranged from 4×1019 sec for Mg to 4×1018 sec for N, and they are consistent with statistical-model predictions.