Abstract
The levels in populated by the allowed positron and electron capture decay of 9.3-min have been investigated with the Copenhagen six-gap spectrometer. Conversion-electron spectrum and beta-gamma coincidence measurements have established the spin and parities of levels in with energies (in kev) 93(2+), 307(4+), 1197(0+), 1277((2+)), 1430((1+)), 1440(0+), and 1483(2+), and possibly a level at 1550. (Double parentheses indicate that the spin is not definitely established.) Intrinsic configuration assignments for the excited states are discussed in terms of recent theoretical developments. The half-life of the 93-kev level has been measured and found to be (1.25±0.08)× sec. The capture ratio measured for the allowed decay to ground is within experimental error of theory. Reduced transition probability ratios for the transitions depopulating the 1197- and 1440-kev 0+ levels have been calculated from the observed -conversion line intensities of the and transitions depopulating the levels.
- Received 26 January 1961
DOI:https://doi.org/10.1103/PhysRev.122.1590
©1961 American Physical Society