Many-body theory and Gaussian-basis implementation of positron annihilation ${\hat{I}}^3$-ray spectra on polyatomic molecules

S. K. Gregg, J. P. Cassidy, A. R. Swann +3

Doppler-broadened ${\hat{I}}^3$-ray spectra for positron annihilation on molecules are calculated using many-body theory. By employing Gaussian bases for the electron and positron wavefunct…