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We investigate $K^{+}$-nucleus elastic scattering at intermediate energieswithin a microscopic optical model approach. To this effect we use the current$K^{+}$-nucleon {\it (KN)} phase shifts from the Center for Nuclear Studies ofthe George Washington University as primary input. First, the {\it KN} phaseshifts are used to generate Gel'fand-Levitan-Marchenko real and local inversionpotentials. Secondly, these potentials are supplemented with a short rangecomplex separable term in such a way that the corresponding unitary andnon-unitary {\it KN} $S$ matrices are exactly reproduced. These {\it KN}potentials allow to calculate all needed on- and off-shell contributions of the$t$ matrix,the driving effective interaction in the full-folding$K^{+}$-nucleus optical model potentials reported here. Elastic scattering ofpositive kaons from $^{6}$Li, $^{12}$C, $^{28}$Si and $^{40}$Ca are studied atbeam momenta in the range 400-1000 MeV/{$c$}, leading to a fair description ofmost differential and total cross section data. To complete the analysis thefull-folding model, three kinds of simpler $t\rho$ calculations are consideredand results discussed. We conclude that conventional medium effects, inconjunction with a proper representation of the basic {\it KN} interaction areessential for the description of $K^{+}$-nucleus phenomena.Comment: 11 pages, 1 table, 12 figures, submitted to PR

physical review. c. nuclear physics/physical review. c, nuclear physics

Microscopic analysis of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-nucleus elastic scattering based on<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>K</mml:mi><mml:mrow><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>-nucleon phase shifts

Microscopic analysis ofK+-nucleus elastic scattering based onK+-nucleon phase shifts