Abstract
The evaluator presents in this publication spectroscopic data and level schemes from radioactive decay and nuclear reactions for all nuclei with mass number A = 212. Highlights from this evaluation include the recent studies of the 208Pb( 7Li,3nγ) reaction (1999Ba30,1998By01), which have extended the previously known level scheme of 212At up to J π = 25 − and provided additional shell-model configuration assignments. Also, it includes the new α-particle and γ-ray data from the α decays of 216Fr (ground state and isomer) (1996Li37), 216Ac (ground state and isomer)(2000He17), and 216Pa (2000He17). Finally, this evaluation presents strong evidence supporting the discovery of a new isotope of protactinium, 212Pa (1997Mi03). The use of the radius parameter (r 0) from 1998Ak04 in the calculation of α hindrance factors for odd-odd nuclei presented here provides uniformity for the application of these quantities to nuclear systematics. The Limitation of Relative Statistical Weight (LWM) method (1985ZIZY) has been very useful for the analyses of discrepant data throughout this evaluation.
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