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The neutron capture cross section of the unstable s-process branching nucleus185W has been derived from experimental data of the inverse 186W(g,n)185Wphotodisintegration taken with monochromatic photon beams from laser Comptonscattering. The result of sigma = 553 +- 60 mb at kT = 30 keV leads to arelatively high effective neutron density in the classical s-process of N_n =4.7 \times 10^8 cm^-3. A realistic model for the s-process in thermally pulsingAGB stars overestimates the abundance of 186Os significantly because of therelatively small neutron capture cross section of 185W.Comment: 10 pages, 3 figure

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

<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:math>-process branching at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mi mathvariant="normal">W</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>185</mml:mn></mml:mrow></mml:mmultiscripts></mml:mrow></mml:math>revised

s-process branching atW185revised