Mutual Excitation via a Two-Phonon Surface Interaction in ${\mathrm{C}}^{12}$ (${\mathrm{C}}^{12}$, ${\mathrm{C}}^{12*}$) ${\mathrm{C}}^{12*}$

G. T. Garvey, A. M. Smith, J. C. Hiebert, and F. E. Steigert

Phys. Rev. Lett. 8, 25 – Published 1 January 1962