A Fourier transform infrared (FTIR) study of the products of the vacuum ultraviolet (VUV) photolysis of a mixture of silane (SiH4) and methane (CH4) trapped in solid At at similar to 10 K has resulted in the first detection of the linear SiCH radical by means of its silicon-carbon stretching mode nu(1)(sigma), which has been observed at 1010.4 cm(-1). The results of extensive measurements of D and C-13 isotopic shifts are in good agreement with the predictions of new ab initio calculations performed at the CCSD(T)/6-31G** (coupled cluster with single, double and partial inclusion of triple excitations) level, and confirm the identification of the linear SiCH radical.