180/sup 0/-correlated equal-energy photons from 5. 9-MeV/nucleon U + Th collisions

Journal Article · Mon Oct 26 00:00:00 EST 1987 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.59.1885· OSTI ID:5918070

Danzmann, K; Meyerhof, W E; Montenegro, E C; Xu, X; Dillard, E; Huelskotter, H P; Stephens, F S; Diamond, R M; Deleplanque, M A; Macchiavelli, A O

We have found a narrow line (intrinsic width less than or equal to2.5 keV) at 1062 +- 1 keV in the summed-energy 180/sup 0/-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 ..mu..b, averaged over the 1-mg/cm/sup 2/ 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.

• Research Organization: Department of Physics, Stanford University, Stanford, California 94305
• OSTI ID: 5918070
• Journal Information: Phys. Rev. Lett.; (United States), Vol. 59:17
• Country of Publication: United States
• Language: English

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