Table 1.

Yb‐169 photon spectrum including all photons with yields greater than 0.1% and ignoring all dosimetrically irrelevant gamma rays below 5 keV

Energy (KeV)	Photons per disintegration
49.77	0.532
50.74	0.94
57.30	0.0993
57.51	0.192
57.90	0.00379
59.03	0.0647
59.21	0.0172
63.12	0.442
93.62	0.0261
109.78	0.1747
118.19	0.01869
130.52	0.1131
177.21	0.2216
197.96	0.358
261.08	0.01715
307.74	0.1005
TOTAL	3.32083