First observation of electron emission from the DD threshold resonance
arXiv:2305.17101 · doi:10.1103/PhysRevC.109.L021601
Abstract
Electron emission in the deuteron-deuteron reaction supporting existence of the single-particle threshold resonance in 4 He has been observed for the first time. The measured electron energy spectrum and the electron-proton branching ratio agree very well with the assumed electron-positron pair creation decay of the 0+ resonance state to the ground state and the detailed Monte Carlo simulations of the experimental energy spectrum.
14 pages, 6 figures