. Author manuscript; available in PMC: 2021 Jan 18.

Published in final edited form as: Med Phys. 1989 Jan-Feb;16(1):66–74. doi: 10.1118/1.596404

Table I.

Data on the radionuclides.

β emitter	β-ray endpoint energy (MeV)	Maximum range (mm)^c	Half-life
32p^a	1.710	8.7	14.3 d
⁶⁷Cu^a	0.576	2.2	61.7 h
⁹⁰Y^a	2.273	11.9	64.0 h
¹¹¹Ag^b	1.035	4.8	7.45 d
¹³¹I^a^,^d	0.606	2.4	8.06 d
¹⁸⁸Re^a	2.132	11.1	16.8 h

Reference 18.

Reference 19.

Calculated for unit density matter using Eq. (10).

The 0.806-MeV β group is very weak.

[¹⁹³^mPt (4 33.d half-life) emits conversion electrons with average energy (yield) of 57.1 (0.16), 126.0 (0.84), 10.0 (1.0), and 1.0 keV (1.0) per decay. The range of the highest energy group is about 0.2 mm. See Ref. 11 for more details and for data on other radiations.]