Pion Emission in H-2,C-12,Al-27(gamma,pi+) Reactions at Threshold

Summary, in English

The very first data from MAX-lab in Lund, Sweden on pion photoproduction at threshold energies are presented. The decrease of the total π+ yield in γ+12C, 27Al reactions below 200 MeV as well as the dσ/dΩ cross-section data essentially follow the predictions of an intranuclear-cascade model with an attractive potential for the pion–nucleus interaction. However, View the MathML source, cross-section data at 176 MeV show deviations which call for refinements of the model and possibly also for the inclusion of coherent pion-production mechanisms.

• Författare: Pavel Golubev; Vladimir Avdeichikov; Kevin Fissum; Bo Jakobsson; I A Pshenichnov; W J Briscoe; G V O O’Rielly; J Annand; Kurt Hansen; Lennart Isaksson; H Jäderström; Martin Karlsson; Magnus Lundin; Bent Schröder; L Westerberg
• Avdelning/ar: Kärnfysik; MAX IV-laboratoriet
• Publiceringsår: 2008
• Språk: Engelska
• Sidor: 216-229
• Publikation/Tidskrift/Serie: Nuclear Physics, Section A
• Volym: 806
• Issue: 1-4
• Länkar: http://dx.doi.org/10.1016/j.nuclphysa.2008.02.308
• Dokumenttyp: Artikel i tidskrift
• Förlag: Elsevier
• Ämne: Natural Sciences; Subatomic Physics; Physical Sciences
• Nyckelord: Nuclear reactions; 2H; 12C; 27Al(γ; π+X); E=176 MeV; measured; σ; σ(θ; E); Comparison with other data; intranuclear cascade model
• Status: Published
• Projekt: Production of Mesons with Electromagnetic Beams
• Forskningsgrupp: Hadronic Reactions
• ISBN/ISSN/Övrigt: ISSN: 0375-9474