Protactinium
Precautions

Protactinium

Section Title: Precautions
Table Section Text: None

Isotope	231Pa	227Ac	227Th	223Ra	219Rn	215Po	211Pb	211Bi	207Tl

SA (Ci/g)	0.048	73	3.1×104	5.2×104	1.3×1010	3×1013	2.5×107	4.2×108	1.9×108

Decay	α	α, β	α	α	α	α	β	α, β	β

Half-life	33 ka	22 a	19 days	11 days	4 s	1.8 ms	36 min	2.1 min	4.8 min

Sentence(s)

Protactinium isotope ²³¹Pa has a specific activity of 0.048 Ci per gram and emits alpha-particles.

final_sentence: Protactinium isotope ²³¹Pa has a specific activity of 0.048 Ci per gram and emits alpha-particles.