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The dipole transition‐matrix elements (DTMEs) and oscillator strengths (OSs) for the doubly excited states (DESs) in heliumlike carbon are investigated using the correlated exponential wavefunctions (CEW). The interactions between the charged particles are taken care of by using both Coulomb and screened Coulomb (Debye–Hückel) potentials. The singly excited 1s3p 1P state and doubly excited 2p2 1De...