DOI:https://doi.org/10.1103/PhysRevLett.12.442
©1964 American Physical Society
Myron Strongin, Arthur Paskin, Donald G. Schweitzer, O. F. Kammerer, and P. P. Craig
Vol. 12, Iss. 16 — 20 April 1964
Sign up to receive regular email alerts from Physical Review Letters