Изотопи на празеодиумот

Природно настанатиот празеодимиум (<sub>59</sub>Pr) е составен од еден стабилен изотоп, <sup>141</sup>Pr. Определени се триесет и осум радиоизотопи од кои најстабилни се <sup>143</sup>Pr, со време на полураспад од 13,57 дена и <sup>142</sup>Pr, со време на полураспад од 19,12 часа. Сите преостанати радиоактивни изотопи имаат време на полураспад помал од шест часа, а поголемиот дел од нив имаат време на полураспад помал од 33 секунди. Овој елемент има и 15 метасостојби со најстабилни <sup>138m</sup>Pr (t<sub>1/2</sub> 2,12 часа), <sup>142m</sup>Pr (t<sub>1/2</sub> 14,6 минути) и <sup>134m</sup>Pr (t<sub>1/2</sub> 11 минути).
Изотопите на празеодимиумот се движат по атомска тежина од 120,955 u (<sup>121</sup>Pr) до 158,955 u (<sup>159</sup>Pr). Примарниот режим на распаѓање пред стабилниот изотоп, <sup>141</sup>Pr, е електронски зафат, а режимот после е бета-распад. Примарните распадни производи пред <sup>141</sup>Pr се изотопи на елементот 58 (цериум), а примарните производи после се изотопи на елементот 60 (неодимиум).
1 Список на изотопите
<sup>121</sup>Pr, 59, 62, 120,95539(54)#, 12(5) мс, p, <sup>120</sup>Ce, (3/2)(+#)
<sup>124</sup>Pr, 59, 65, 123,94294(43)#, 1,2(2) с, β<sup>+</sup>, <sup>124</sup>Ce
β<sup>+</sup>, p (?%), <sup>123</sup>La
<sup>125</sup>Pr, 59, 66, 124,93766(32)#, 3,3(7) с, β<sup>+</sup>, <sup>125</sup>Ce, 3/2+#
<sup>126</sup>Pr, 59, 67, 125,93524(21)#, 3,12(18) с, β<sup>+</sup>, <sup>126</sup>Ce, (4, 5)
β<sup>+</sup>, p (?%), <sup>125</sup>La
<sup>127</sup>Pr, 59, 68, 126,93071(21)#, 4,2(3) с, β<sup>+</sup>, <sup>127</sup>Ce, 3/2+#
<sup>127m</sup>Pr, 600(200)# keV, 2# μс, (11/2−)
<sup>128</sup>Pr, 59, 69, 127,928791(32), 2,85(9) с, β<sup>+</sup>, <sup>128</sup>Ce, (3+)
β<sup>+</sup>, p (?%), <sup>127</sup>La
<sup>129</sup>Pr, 59, 70, 128,925095(32), 30(4) с, β<sup>+</sup>, <sup>129</sup>Ce, (3/2+)
<sup>129m</sup>Pr, 382,57(24) keV, 26(11)# μс, IT, <sup>129</sup>Pr, (11/2−)
<sup>130</sup>Pr, 59, 71, 129,923590(69), 40,0(4) с, β<sup>+</sup>, <sup>130</sup>Ce, (6, 7)(+#)
<sup>130m</sup>Pr, 100(100)# keV, 10# с, 2+#
<sup>131</sup>Pr, 59, 72, 130,920235(50), 1,50(3) мин, β<sup>+</sup>, <sup>131</sup>Ce, (3/2+)
<sup>131m</sup>Pr, 152,4(3) keV, 5,73(20) с, IT (96,4%), <sup>131</sup>Pr, (11/2−)
β<sup>+</sup> (3,6%), <sup>131</sup>Ce
<sup>132</sup>Pr, 59, 73, 131,919240(31), 1,49(11) мин, β<sup>+</sup>, <sup>132</sup>Ce, (2+)
<sup>132m1</sup>Pr, 30(30)# keV, 1# с, (5+)
<sup>132m2</sup>Pr, 250(30)# keV, 2,46(4) μс, IT, <sup>132</sup>Pr, (8+)
<sup>132m3</sup>Pr, 300(30)# keV, 486(70) нс, IT, <sup>132</sup>Pr, (8−)
<sup>133</sup>Pr, 59, 74, 132,916331(13), 6,5(3) мин, β<sup>+</sup>, <sup>133</sup>Ce, 5/2+
<sup>133m</sup>Pr, 192,12(14) keV, 1,1(2) μс, IT, <sup>133</sup>Pr, (11/2−)
<sup>134</sup>Pr, 59, 75, 133,915697(22), 17(2) мин, β<sup>+</sup>, <sup>134</sup>Ce, 2−
<sup>134m</sup>Pr, 67,7(4) keV, ~11 мин, β<sup>+</sup>, <sup>134</sup>Ce, 6−
<sup>135</sup>Pr, 59, 76, 134,913112(13), 24(1) мин, β<sup>+</sup>, <sup>135</sup>Ce, 3/2+
<sup>135m</sup>Pr, 358,06(6) keV, 105(10) μс, IT, <sup>135</sup>Pr, (11/2−)
<sup>136</sup>Pr, 59, 77, 135,912677(12), 13,1(1) мин, β<sup>+</sup>, <sup>136</sup>Ce, 2+
<sup>137</sup>Pr, 59, 78, 136,9106792(87), 1,28(3) ч, β<sup>+</sup>, <sup>137</sup>Ce, 5/2+
<sup>137m</sup>Pr, 561,22(23) keV, 2,66(7) μс, IT, <sup>137</sup>Pr, 11/2−
<sup>138</sup>Pr, 59, 79, 137,910757(11), 1,45(5) мин, β<sup>+</sup>, <sup>138</sup>Ce, 1+
<sup>138m</sup>Pr, 350(19) keV, 2,12(4) ч, β<sup>+</sup>, <sup>138</sup>Ce, 7−
<sup>139</sup>Pr, 59, 80, 138,9089327(39), 4,41(4) ч, β<sup>+</sup>, <sup>139</sup>Ce, 5/2+
<sup>140</sup>Pr, 59, 81, 139,9090856(66), 3,39(1) мин, EC (51,3%), <sup>140</sup>Ce, 1+
β<sup>+</sup> (48,7%)
<sup>140m1</sup>Pr, 127,8(3) keV, 0,35(2) μс, IT, <sup>140</sup>Pr, 5+
<sup>140m2</sup>Pr, 763,7(5) keV, 3,05(20) μс, IT, <sup>140</sup>Pr, (7)−
<sup>141</sup>Pr, 59, 82, 140,9076596(16), Стабилен, 5/2+, 1,0000
<sup>142</sup>Pr, 59, 83, 141,9100516(16), 19,12(4) ч, β<sup>−</sup> (99,98%), <sup>142</sup>Nd, 2−
EC (0,0164%), <sup>142</sup>Ce
<sup>142m</sup>Pr, 3,694(3) keV, 14,6(5) мин, IT, <sup>142</sup>Pr, 5−
<sup>143</sup>Pr, 59, 84, 142,9108226(19), 13,57(2) д, β<sup>−</sup>, <sup>143</sup>Nd, 7/2+
<sup>144</sup>Pr, 59, 85, 143,9133107(29), 17,28(5) мин, β<sup>−</sup>, ''<sup>144</sup>Nd'', 0−
<sup>144m</sup>Pr, 59,03(3) keV, 7,2(3) мин, IT (~99,93%), <sup>144</sup>Pr, 3−
β<sup>−</sup> (~0,07%), ''<sup>144</sup>Nd''<sup>145</sup>Pr, 59, 86, 144,9145180(77), 5,984(10) ч, β<sup>−</sup>, <sup>145</sup>Nd, 7/2+
<sup>146</sup>Pr, 59, 87, 145,917688(37), 24,09(10) мин, β<sup>−</sup>, <sup>146</sup>Nd, (2−)
<sup>147</sup>Pr, 59, 88, 146,919007(17), 13,39(4) мин, β<sup>−</sup>, <sup>147</sup>Nd, 3/2+
<sup>148</sup>Pr, 59, 89, 147,922130(16), 2,29(2) мин, β<sup>−</sup>, <sup>148</sup>Nd, 1−
<sup>148m</sup>Pr, 76,80(20) keV, 2,01(7) мин, β<sup>−</sup> (64%), <sup>148</sup>Nd, (4)
IT (36%), <sup>148</sup>Pr
<sup>149</sup>Pr, 59, 90, 148,923736(11), 2,26(7) мин, β<sup>−</sup>, <sup>149</sup>Nd, (5/2+)
<sup>150</sup>Pr, 59, 91, 149,9266764(97), 6,19(16) с, β<sup>−</sup>, ''<sup>150</sup>Nd'', 1−
<sup>151</sup>Pr, 59, 92, 150,928309(13), 18,90(7) с, β<sup>−</sup>, <sup>151</sup>Nd, (3/2−)
<sup>151m</sup>Pr, 35,10(10) keV, 50(8) μс, IT, <sup>151</sup>Pr, (7/2+)
<sup>152</sup>Pr, 59, 93, 151,931553(20), 3,57(11) с, β<sup>−</sup>, <sup>152</sup>Nd, 4+
<sup>152m</sup>Pr, 115,1(3) keV, 4,16(10) μс, IT, <sup>152</sup>Pr, (1+)
<sup>153</sup>Pr, 59, 94, 152,933904(13), 4,28(11) с, β<sup>−</sup>, <sup>153</sup>Nd, 3/2−#
<sup>154</sup>Pr, 59, 95, 153,93789(11), 2,30(9) с, β<sup>−</sup>, <sup>154</sup>Nd, (3+)
<sup>155</sup>Pr, 59, 96, 154,940509(18), 1,47(3) с, β<sup>−</sup>, <sup>155</sup>Nd, 3/2−#
<sup>156</sup>Pr, 59, 97, 155,9447669(11), 444(6) мс, β<sup>−</sup>, <sup>156</sup>Nd, 1+#
<sup>157</sup>Pr, 59, 98, 156,9480031(34), 307(21) мс, β<sup>−</sup>, <sup>157</sup>Nd, 3/2−#
<sup>158</sup>Pr, 59, 99, 157,95260(32)#, 181(14) мс, β<sup>−</sup>, <sup>158</sup>Nd, 5−#
<sup>159</sup>Pr, 59, 100, 158,95623(43)#, 134(43) мс, β<sup>−</sup>, <sup>159</sup>Nd, 3/2−#
<sup>160</sup>Pr, 59, 101, 159,96114(43)#, 170(140) мс, β<sup>−</sup>, <sup>160</sup>Nd, 1+#
<sup>161</sup>Pr, 59, 102, 160,96512(54)#, 90# мс[>550 нс], 3/2−#
2 Наводи
* Isotope masses from:
*** Half-life, spin, and isomer data selected from the following sources.
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