Next Gamow modeled the alpha decay as a symmetric one-dimensional problem, with a standing wave between two symmetric potential barriers at q 0 < x < q 0 + l and − − ( q 0 + l ) < x < − − q 0 , and emitting waves at both outer sides of the barriers. Solving this can in principle be done by taking the solution of the first problem, translating it by q 0 and gluing it to an identical solution reflected around x = 0 .