Zeeman Investigations of Curium-242

The atomic-beam magnetic-resonance method has been used to investigate 163-day Cm242 , The spin of this even-even nuclide is found to be zero. Four low-lying electronic energy levels are found and the Lande g factors are measured to be gJ = 2.561 ± .003, 2 gJ = 1.776 ± .002 and gJ = · 1.671 ± .• 003. 4 5 gJ = 2.000 ± .003, 3 No direct measurement can be made of the angular momenta of these levels, but other considerations contained in the text make highly probable the J values indicated in sub scripts and arising from the electronic configuration (5f) 7 (6d) 1 (7s) 2 . ..• ZEEMAN INVESTIGATIONS OF CURIUM- 242 John C.