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231 Pa makes up nearly all natural protactinium. The primary decay mode for isotopes of Pa lighter than (and including) the most stable isotope 231 Pa is alpha decay, except for 228 Pa to 230 Pa, which primarily decay by electron capture to isotopes of thorium. The primary mode for the heavier isotopes is beta minus (β −) decay.
Protactinium also has two nuclear isomers, 217m Pa (half-life 1.2 milliseconds) and 234m Pa (half-life 1.16 minutes). [ 34 ] The primary decay mode for the most stable isotope 231 Pa and lighter ( 211 Pa to 231 Pa) is alpha decay , producing isotopes of actinium .
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Protactinium(V) fluoride can be prepared by reacting protactinium oxide with either bromine pentafluoride or bromine trifluoride at about 600 °C, and protactinium(IV) fluoride is obtained from the oxide and a mixture of hydrogen and hydrogen fluoride at 600 °C; a large excess of hydrogen is required to remove atmospheric oxygen leaks into the ...
The most common side effects reported during clinical trials in men receiving 223 Ra were nausea, diarrhea, vomiting and swelling of the leg, ankle or foot. The most common abnormalities detected during blood testing were anemia , lymphocytopenia , leukopenia , thrombocytopenia and neutropenia .
Decay; abundance half-life (t 1/2) mode product; 229 Pa synth: 1.5 d: ... 234m Pa trace 1.159 min:
However, there are side effects such as nausea, vomiting, diarrhea and constipation and, for the injectibals, injection-side irritation, injury or discomfort. Often, these are mild and serious ...