9. Although we haven t drawn the requested lines in the following table, we can indicate their slopes: lines
of constant A would have -45ć% slopes, and those of constant N -Z would have 45ć%. As an example of the
latter, the N -Z = 20 line (which is one of eighteen-neutron excess ) would pass through Cd-114 at the
lower left corner up through Te-122 at the upper right corner. The first column corresponds to N = 66,
and the bottom row to Z = 48. The last column corresponds to N = 70, and the top row to Z =52 .
Much of the information below (regarding values of T1/2 particularly) was obtained from the websites
http://nucleardata.nuclear.lu.se/nucleardata and http://www.nndc.bnl.gov/nndc/ensdf (we refer the
reader to the remarks we made in the solution to problem 8).
118 119 120 121 122
Te Te Te Te Te
6.0days 19.4days
0.1% 2.6%
16.0h
117 118 119 120 121
Sb Sb Sb Sb Sb
57.2%
2.8h 3.6min 38.2s 15.9min
116 117 118 119 120
Sn Sn Sn Sn Sn
14.5% 7.7% 24.2% 8.6% 32.6%
115 116 117 118 119
In In In In In
95.7%
14.1s 43.2min 5.0s 2.4min
114 115 116 117 118
Cd Cd Cd Cd Cd
28.7% 7.5%
53.5h 2.5h 50.3min
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