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Search for narrow-peak structure in the three-photon spectrum from 6-MeV/nucleon U+Th, U+U, and Th+Th collisions (1991)

Danzmann, Karsten,
Meyerhof, W. E.,
Belkacem, A.,
Montenegro, E. C.,
Dillard, E.,
Hülskötter, H. P.,
Guardala, N.,
Spooner, D. W.,
Kotlinski, B.,
Cline, D.,
Kavka, A.,
Beausang, C. W.,
Burde, J.,
McDonald, R. J.,
Macchiavelli, A. O.,
Rude, B. S.,
Molitoris, J. D.

Abstract

We have searched for three-photon decays produced in 6-MeV/nucleon U+Th, Th+Th, and U+U collisions. We see no evidence for narrow lines corresponding to the electron-positron lines seen by others: in the summed-energy region between 1.2 and 2.0 MeV, we set an upper limit for the cross section of 3×10-28 cm2 averaged over a target thickness of 1 mg/cm2.

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Download	http://edoc.mpg.de/372219
Repository	Max Planck Society - eDocument Server (Germany)
Type	Article