Wapstra studied physics at Utrecht University and obtained his PhD with the dissertation " Decay schemes of Pb209, Bi207 and Bi214 and the binding energies of the heavy nuclei " at the University of Amsterdam in 1953.
12.
An example : in the simplified decay scheme of 60 Co above, the angular momenta and the parities of the various states are shown ( A plus sign means even parity, a minus sign means odd parity ).
13.
It is useful to think of the decay scheme as placed in a coordinate system, where the ordinate axis is energy, increasing from bottom to top, and the abscissa is the proton number, increasing from left to right.
14.
Recognising the application of mass spectrometry methods to geology in the 1970s and 1980s, de Laeter also established a series of projects with the Geological Survey of Western Australia and the University of Western Australia to develop geochronology capabilities based on the uranium-lead decay schemes.
15.
The gamma spectrum shown in Figure 2 is of the cobalt isotope, with two gamma rays with 1.17 MeV and 1.33 MeV respectively . ( " See the decay scheme article for the decay scheme of cobalt-60 . " ) The two gamma lines can be seen well-separated; the peak to the left of channel 200 most likely indicates a strong background radiation source that has not been subtracted.
16.
The gamma spectrum shown in Figure 2 is of the cobalt isotope, with two gamma rays with 1.17 MeV and 1.33 MeV respectively . ( " See the decay scheme article for the decay scheme of cobalt-60 . " ) The two gamma lines can be seen well-separated; the peak to the left of channel 200 most likely indicates a strong background radiation source that has not been subtracted.
