Title of article
Hard photon and neutral pion production in cold nuclear matter
Author/Authors
L. Aphecetche، نويسنده , , J. Bacelar، نويسنده , , H. Delagrange، نويسنده , , D. dEnterria، نويسنده , , M. Hoefman، نويسنده , , H. Huisman، نويسنده , , N. Kalantar-Nayestanaki، نويسنده , , H. Lohner، نويسنده , , G. Mart??nez، نويسنده , , T. Matulewicz، نويسنده , , J. Messchendorp، نويسنده , , M.-J. Mora، نويسنده , , R. Ostendorf، نويسنده , , B. Krusche and S. Schadmand، نويسنده , , Y. Schutz، نويسنده , , Hans M. Seip، نويسنده , , A. Taranenko، نويسنده , , R. Turrisi، نويسنده , , M.-J. Van Goethem، نويسنده , , M. Volkerts، نويسنده , , et al.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2001
Pages
7
From page
8
To page
14
Abstract
The production of hard photons and neutral pions in 190 MeV proton induced reactions on C, Ca, Ni, and W targets has been for the first time concurrently studied. Angular distributions and energy spectra up to the kinematical limit are discussed and the production cross-sections are presented. From the target mass dependence of the cross-sections the propagation of pions through nuclear matter is analyzed and the production mechanisms of hard photons and primordial pions are derived. It is found that the production of subthreshold particles proceeds mainly through first chance nucleon–nucleon collisions. For the most energetic particles the mass scaling evidences the effect of multiple collisions.
Keywords
Proton–nucleus reactions , Hard photons , Subthreshold pions
Journal title
PHYSICS LETTERS B
Serial Year
2001
Journal title
PHYSICS LETTERS B
Record number
914821
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