Der Einfluß nichtlinearer Oberflächen-Schwingungen auf die Dichteverteilung im Atomkern nach dem Tröpfchenmodell
The cubic terms in the Hamiltonian of the oscillating surface are eliminated by a canonical transformation. The expectation value of the density in the ground state, the mean radius in the one-surfon state and the transition density are calculated in a higher approximation.