                             field = String(format: "%d", strip)
                         }
                     }
+                case keyColumnStartBackSumm:
+                    if row == 0 && startParticleType != recoilType {
+                        if let summ = getSummEnergyFrom(fissionsAlphaBackPerAct) {
+                            field = String(format: "%.7f", summ)
+                        }
+                    }
                 case keyColumnStartBackEnergy:
                     let array = startParticleType == recoilType ? recoilsBackPerAct : fissionsAlphaBackPerAct
                     if row < array.count {

            keyColumnStartFrontMarker,
            keyColumnStartFrontDeltaTime,
            keyColumnStartFrontStrip,
            keyColumnStartBackEnergy,
            keyColumnStartBackMarker,
            keyColumnStartBackDeltaTime,

    fileprivate var keyColumnTofDeltaTime = "dT(TOF-RFron)"
    fileprivate var keyColumnStartEvent = "Event($)"
    fileprivate var keyColumnStartFrontSumm = "Summ($Fron)"
    fileprivate var keyColumnStartBackSumm = "Summ($Back)"
    fileprivate var keyColumnStartFrontEnergy = "$Fron"
    fileprivate var keyColumnStartFrontMarker = "$FronMarker"
    fileprivate var keyColumnStartFrontDeltaTime = "dT($FronFirst-Next)"
