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180°-correlated equal-energy photons from 5.9-MeV/nucleon U + Th collisions

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Danzmann,  Karsten
Laser Interferometry & Gravitational Wave Astronomy, AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Citation

Danzmann, K., Meyerhof, W. E., Montenegro, E. C., Xu, X.-Y., Dillard, E., Hülskötter, H. P., et al. (1987). 180°-correlated equal-energy photons from 5.9-MeV/nucleon U + Th collisions. Physical Review Letters, 59(17), 1885-1888. doi:10.1103/PhysRevLett.59.1885.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0013-5D8C-A
Abstract
We have found a narrow line (intrinsic width ≤2.5 keV) at 1062±1 keV in the summed-energy 180°-c.m.-correlated two-photon spectrum from 5.95-MeV/nucleon U+Th collisions. Including possible systematic uncertainties, the production cross section is found to be 50±25 μb, averaged over the 1-mg/cm2 Th target thickness. This line may belong to the decay of a neutral system which also produces correlated electron-positron pairs found by others in the same reaction.