Çakır, Orhan2019-06-282019-06-28201710.1088/1674-1137/41/6/063001http://hdl.handle.net/20.500.12575/66885By analyzing the large-angle Bhabha scattering events e +e − → (γ)e+e − and diphoton events e +e − → (γ)γγ for the data sets collected at center-of-mass (c.m.) energies between 2.2324 and 4.5900 GeV (131 energy points in total) with the upgraded Beijing Spectrometer (BESIII) at the Beijing Electron-Positron Collider (BEPCII), the integrated luminosities have been measured at the different c.m. energies, individually. The results are important inputs for the R value and J/ψ resonance parameter measurements.enluminosity, Bhabha, diphoton, R value41060111