“…The ''gold standard'' in methods for fitting or interpolating PESs for diatomic molecules scattering from metal surfaces, which has been used the most 11,48,53,54,56,109,114,116,128,129,131,133,145,148,151,156,161,170,174,176,181,[183][184][185][186]188,[192][193][194][195][196][197]199,200,208,216,217,[242][243][244][245][246][247][248][249] in studies of H 2 -metal surface scattering that appeared over the last decade, is the corrugation reducing procedure (or the CRP method) developed by Busnengo et al 27 and extended by Olsen et al 250 The CRP method performs so well because it takes ...…”