Using getSigmaCal.cxx macro to check energy resolutions...
root [3] getSigmaCal("201905151555_137Cs.root")


EAn01	660.978	20.4516	7.27122%	

EAn02	662.018	21.8206	7.74577%	

EAn03	654.685	21.2331	7.62164%	

EAn04	664.496	21.7799	7.70251%	

EAn05	661.188	21.3019	7.57112%	

EAn06	663.225	22.609	8.01103%	

EAn07	658.977	21.7486	7.75584%	

EAn08	661.333	21.1595	7.51887%	

EAn11	660.622	20.6158	7.33354%	

EAn12	662.106	22.8196	8.09931%	

EAn13	660.16	19.4654	6.92918%	

EAn14	660.348	22.9705	8.17459%	

EAn15	660.277	19.6762	7.00298%	

EAn16	661.323	22.0482	7.83478%	

EAn17	659.072	21.5303	7.6769%	

EAn18	662.739	22.9924	8.15284%	

EDy01	660.951	20.8514	7.41366%	

EDy02	661.465	22.2272	7.89669%	

EDy03	654.887	21.7742	7.81345%	

EDy04	663.585	22.2593	7.88284%	

EDy05	660.353	21.7962	7.75661%	

EDy06	661.692	23.2316	8.25072%	***

EDy07	658.636	22.3986	7.99178%	

EDy08	662.167	21.8422	7.75169%	

EDy11	661.634	21.2086	7.53289%	

EDy12	662.504	23.1784	8.22173%	***

EDy13	660.297	20.7076	7.36985%	

EDy14	662.493	23.5084	8.33893%	***

EDy15	661.844	20.3493	7.22539%	

EDy16	662.861	23.092	8.18665%	

EDy17	661.152	22.215	7.89612%	

EDy18	659.903	23.6411	8.41889%	***