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Properties of substance:
promethium
Group of substances:
inorganic
Physical appearance:
metal
Empirical formula (Hill's system for organic substances):
Pm
Structural formula as text:
Pm
Molar/atomic mass: 144.9128
Melting point (°C):
1170
Boiling point (°C):
3000
Numerical data:
Year of discovery: 1947
Half-life:
128
61
Pm = 1.0 s (β
+
(about 100%))
129
61
Pm = 2.4 s (β
+
(100%))
130
61
Pm = 2.6 s (β
+
(100%))
131
61
Pm = 6.3 s (β
+
(100%))
132
61
Pm = 6.2 s (β
+
(100%))
133
61
Pm = 13.5 s (β
+
(100%))
134
61
Pm = 22 s (β
+
(100%))
134m
61
Pm = 5 s (β
+
(100%))
135
61
Pm = 49 s (β
+
(100%))
135m
61
Pm = 40 s (β
+
(100%))
136
61
Pm = 107 s (β
+
(100%))
136m
61
Pm = 300 s (β
+
(100%))
136n
61
Pm = 1.5 μs (internal transition (100%))
137m
61
Pm = 2.4 min (β
+
(100%))
138
61
Pm = 10 s (β
+
(100%))
138m
61
Pm = 3.24 min (β
+
(100%))
139
61
Pm = 4.15 min (β
+
(100%))
139m
61
Pm = 180 ms (internal transition (100%))
140
61
Pm = 9.2 s (β
+
(100%))
140m
61
Pm = 5.95 min (β
+
(100%))
141
61
Pm = 20.90 min (β
+
(100%))
141m
61
Pm = 630 ns (internal transition (100%))
142
61
Pm = 40.5 s (β
+
(77.1%), electron capture (22.9%))
142m
61
Pm = 2.0 ms (internal transition (100%))
142n
61
Pm = 67 μs (internal transition (100%))
143
61
Pm = 265 d (electron capture (100%))
144
61
Pm = 363 d (electron capture (100%))
144m
61
Pm = 780 ns (internal transition (100%))
144n
61
Pm = 2.7 μs (internal transition (100%))
145
61
Pm = 17.7 y (electron capture (100%), α (0.000 000 28%))
146
61
Pm = 5.53 y (electron capture (66%), β
-
(34%))
147
61
Pm = 2.6234 y (β
-
(100%))
148
61
Pm = 5.368 d (β
-
(100%))
148m
61
Pm = 41.29 d (β
-
(95.8%), internal transition (4.2%))
149
61
Pm = 53.08 hasа (β
-
(100%))
149m
61
Pm = 35 μs (internal transition (100%))
150
61
Pm = 2.698 hasа (β
-
(100%))
151
61
Pm = 18.90 s (β
-
(100%))
151m
61
Pm = 50 μs (internal transition (100%))
152
61
Pm = 4.12 min (β
-
(100%))
152m
61
Pm = 7.52 min (β
-
(100%))
152n
61
Pm = 13.8 min (β
-
(about 100%))
153
61
Pm = 5.25 min (β
-
(100%))
154
61
Pm = 2.68 min (β
-
(100%))
154m
61
Pm = 1.73 min (β
-
(100%))
155
61
Pm = 41.5 s (β
-
(100%))
156
61
Pm = 27.2 s (β
-
(100%))
157
61
Pm = 10.56 s (β
-
(100%))
158
61
Pm = 4.8 s (β
-
(100%))
159
61
Pm = 1.49 s (β
-
(100%))
160
61
Pm = 725 ms (β
-
(100%))
161
61
Pm = 1.05 s (β
-
(100%), β
-
n)
162
61
Pm = 630 ms (β
-
(100%), β
-
n)
163
61
Pm = 430 ms (β
-
(100%), β
-
n)
References:
Бекман И.Н. Радиохимия. Том II: Радиоактивные элементы. - М.: Издатель Мархитин П.Ю., 2014. - pp. 70-73 [Russian]
Лаврухина А.К., Поздняков А.А. Аналитическая химия технеция, прометия, астатина и франция. - М.: Наука, 1966. - pp. 108-118 [Russian]
Химическая энциклопедия. - Т. 4. - М.: Советская энциклопедия, 1995. - pp. 100-101 [Russian]
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© Collected Ruslan Anatolievich Kiper, burewestnik@mail.ru
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