Bibliographical noteFunding Information:
Ac know le d~me n t s The authors wish to thank Dr. A. H. Windle for making a copy of his manuscript available before publication. It is also a pleasure to thank Drs. B. W. Christ and G. A. Moore for their interest in this work. Financial support by the United States Atomic Energy Commission, and the encouragement of A. Van Echo and J. M. Simmons of the Nuclear Technology Branch of the A. E. C. is especially appreciated.
Copyright 2017 Elsevier B.V., All rights reserved.