κ mixed  A B   ( t | d 0  , t 0  ) = ( 4 π D +  Δ t )  − 3 / 2   e − d 0 2   4 D +  Δ t     ⋅ k N A          ( 11  )    MathType@MTEF@5@5@+=feaafiart1ev1aaatCvAUfKttLearuWrP9MDH5MBPbIqV92AaeXatLxBI9gBaebbnrfifHhDYfgasaacH8akY=wiFfYdH8Gipec8Eeeu0xXdbba9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9s8qqaq=dirpe0xb9q8qiLsFr0=vr0=vr0dc8meaabaqaciaacaGaaeqabaqabeGadaaakeaaiiGacqWF6oWAdaqhaaWcbaGaeeyBa0MaeeyAaKMaeeiEaGNaeeyzauMaeeizaqgabaGaemyqaeKaemOqaieaaOGaeiikaGIaemiDaqNaeiiFaWNaemizaq2aaSbaaSqaaiabicdaWaqabaGccqGGSaalcqWG0baDdaWgaaWcbaGaeGimaadabeaakiabcMcaPiabg2da9iabcIcaOiabisda0iab=b8aWjabdseaenaaBaaaleaacqGHRaWkaeqaaOGaeuiLdqKaemiDaqNaeiykaKYaaWbaaSqabeaacqGHsislcqaIZaWmcqGGVaWlcqaIYaGmaaGccqWGLbqzdaahaaWcbeqaaiabgkHiTmaalaaabaGaemizaq2aa0baaWqaaiabicdaWaqaaiabikdaYaaaaSqaaiabisda0iabdseaenaaBaaameaacqGHRaWkaeqaaSGaeuiLdqKaemiDaqhaaaaakiabgwSixpaalaaabaGaem4AaSgabaGaemOta40aaSbaaSqaaiabdgeabbqabaaaaOGaaCzcaiaaxMaadaqadaqaaiabigdaXiabigdaXaGaayjkaiaawMcaaaaa@671D@