OBSERVATION OF THE SPIN 20 LEVEL IN THE GROUND STATE ROTATIONAL BAND OF 158Dy P. THIEBERGER, A. W. SUNYAR, P. C. ROGERS, N. LARK, O. C. KISTNER, E. der MATEOSIAN, S. COCHAVI and E. H. AUERBACH J. Phys. Colloques, 32 C6 (1971) C6-289-C6-290 DOI: 10.1051/jphyscol:1971668