Collision-induced emission (CIE) experiments were carried out by coupling a spectrograph and charge-coupled device detector (CCD) to a commercial analytical mass spectrometer. An Einzel lens and a deceleration-reacceleration lens assembly as described in the current article were installed in the mass spectrometer to allow for the deceleration of the ions before collision. Collision-induced emission spectra of N-2(+center dot)/He collisions at lab frame collision energies from 2 to 8 keV were obtained from 190-1020 nm. The emissions were assigned to the Delta v = +2, +1, 0, -1, -2 vibrational transition progression in the N-2(+center dot) B (2)Sigma(+)(u) -> X (2)Sigma(+)(g) electronic transition as well as some atomic lines from the fragments N+, N-center dot and the target gas He. N-2(+center dot) A (2)Pi(u) -> X (2)Sigma(+)(g) emission was also observed but was very weak due to the long lifetime of the A (2)Pi(u) state. The relative intensities of the N-2(+center dot), N, and N+ emissions are independent of the ion translational energy within the studied energy range. This observation supports the curve-crossing mechanism for collisional excitation, suggesting that a complicated sequence of curve-crossings takes place upon collisional activation.