             if searchNeutrons {
                 findNeutrons()
                 fseek(file, Int(position), SEEK_SET)
+                findNeutronsBack()
+                fseek(file, Int(position), SEEK_SET)
             }
             
             findSpecialEvents()

    fileprivate var totalEventNumber: CUnsignedLongLong = 0
    fileprivate var firstFissionAlphaTime: CUnsignedLongLong = 0 // время главного осколка/альфы в цикле
    fileprivate var neutronsSummPerAct: CUnsignedLongLong = 0
    var files = [String]()
    fileprivate var currentFileName: String?
    fileprivate var neutronsMultiplicityTotal = [Int : Int]()

    
    func clearActInfo() {
        neutronsSummPerAct = 0
        neutronsBackwardSummPerAct = 0
        fissionsAlphaFrontPerAct.removeAll()
        fissionsAlphaBackPerAct.removeAll()
        gammaPerAct.removeAll()
