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Antineutron–nucleus annihilation cross sections below 400 MeV/c

✍ Scribed by M. Astrua; E. Botta; T. Bressani; D. Calvo; C. Casalegno; A. Feliciello; A. Filippi; S. Marcello; M. Agnello; F. Iazzi

Book ID
104335037
Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
241 KB
Volume
697
Category
Article
ISSN
0375-9474

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✦ Synopsis

Antineutron annihilation cross sections on C, Al, Cu, Ag, Sn and Pb targets were measured in the momentum range 50-400 MeV/c. The full set of data is very well described by a parameterization in which the target mass number and momentum dependence are factorized. The A dependence is, within 2%, consistent with a A 2/3 scaling law, indicating a pure surface process. The momentum dependence is, within 20%, consistent with that expected from a properly averaged contribution of the elementary cross section for np and nn annihilation, indicating that the process is due to the interaction with single nucleons on the surface.

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