Pion emission in ²H, ¹²C, ²⁷Al(γ,π⁺) reactions at threshold

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• 作者：P. Golubev ; V. Avdeichikov ; K.G. Fissum ; B. Jakobsson ; I.A. Pshenichnov ; W.J. Briscoe ; G.V. O'Rielly ; J. Ann ; K. Hansen ; L. Isaksson ; H. Jä ; derströ ; m ; M. Karlsson ; M. Lundin ; B. Schrö ; der
• 关键词：Nuclear reactions ; ²H ; ¹²C ; ²⁷Al( ; none ; color ; black"" href=""/science?_ob=MathURL&_method=retrieve&_udi=B6TVB-4S32NJF-1&_mathId=mml5&_user=1067359&_cdi=
• 刊名：Nuclear Physics A
• 出版年：2008
• 出版时间：15 June 2008
• 年：2008
• 卷：806
• 期：1-4
• 页码：216-229
• 全文大小：759 K

文摘

The very first data from MAX-lab in Lund, Sweden on pion photoproduction at threshold energies are presented. The decrease of the total JF-1&_mathId=mml2&_user=1067359&_cdi=5530&_rdoc=14&_acct=C000050221&_version=1&_userid=10&md5=0440dceae717ecee1e47c7e56c1517ee"" title=""Click to view the MathML source"" alt=""Click to view the MathML source"">π⁺ yield in γ+¹²C, ²⁷Al reactions below 200 MeV as well as the w the MathML source"" alt=""Click to view the MathML source"">dσ/dΩ cross-section data essentially follow the predictions of an intranuclear-cascade model with an attractive potential for the pion–nucleus interaction. However, www.sciencedirect.com/cache/MiamiImageURL/B6TVB-4S32NJF-1-5/0?wchp=dGLzVzz-zSkzS"" alt=""View the MathML source"" title=""View the MathML source"" align=""absbottom"" border=""0"" height=17 width=""78""/>, 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.