Publication Date:
2019-06-27
Description:
An experiment was conducted to measure gamma ray pairs produced in the electron-positron reaction in the region of psi(3684) resonance. The apparatus consisted of two identical spectrometers mounted in a collinear configuration about the beam interaction region. Graphs are presented for the coplanarity angle between reconstructed gamma ray directions, for the scattering and energy deposition of gamma rays in the two crystals used, and for the observed rate of annihilation reactions as a function of center of mass energy.
Keywords:
NUCLEAR AND HIGH-ENERGY PHYSICS
Type:
Physical Review Letters; 36; Jan. 12
Format:
text
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