Изотопи на цериумот

Во природата цериумот (58Ce) е составен од 4 стабилни изотопи: 136Ce, 138Ce, 140Ce и 142Ce, при што 140Ce е најзастапен (88,48% природна застапеност) и единствениот теоретски стабилен. Се предвидува дека 136Ce, 138Ce и 142Ce ќе претрпат двоен бета-распад, но овој процес никогаш не бил забележан. Има 35 радиоизотопи со определени одлики, при што најстабилен е 144Ce, со време на полураспад од 284.893 дена, 139 Ce, со време на полураспад од 137.640 дена и 141Ce, со време на полураспад од 32.501 дена. Сите преостанати радиоактивни изотопи имаат време на полураспад помало од 4 дена, а повеќето од нив имаат време на полураспад помало од 10 минути. Овој елемент има и 10 мета-состојби.

Изотопите на цериумот се движат по атомска тежина од 119 u (119Ce) до 157 u (157Ce).

## Список на изотопи

|-id=Цериум-121
| rowspan=2|121Ce
| rowspan=2 style="text-align:right" | 58
| rowspan=2 style="text-align:right" | 63
| rowspan=2|120,94344(43)#
| rowspan=2|1,1(1)&nbsp;с
| β<sup>+</sup> (99%)
| 121La
| rowspan=2|5/2(+#)
| rowspan=2|
| rowspan=2|
|-
| β+, p (1%)
| 121La
|-id=Цериум-122
| 122Ce
| style="text-align:right" | 58
| style="text-align:right" | 64
| 121,93787(43)#
| 2#&nbsp;с
| β+
| 122La
| 0+
| 
| 
|-id=Цериум-123
| rowspan=2|123Ce
| rowspan=2 style="text-align:right" | 58
| rowspan=2 style="text-align:right" | 65
| rowspan=2|122,93528(32)#
| rowspan=2|3,8(2)&nbsp;с
| β+ (?%)
| 123La
| rowspan=2|(5/2)(+#)
| rowspan=2|
| rowspan=2|
|-
| β+, p (?%)
| 122Ba
|-id=Цериум-124
| 124Ce
| style="text-align:right" | 58
| style="text-align:right" | 66
| 123,93031(32)#
| 9,1(12)&nbsp;с
| β+
| 124La
| 0+
|
|
|-id=Цериум-125
| rowspan=2|125Ce
| rowspan=2 style="text-align:right" | 58
| rowspan=2 style="text-align:right" | 67
| rowspan=2|124,92844(21)#
| rowspan=2|9,7(3)&nbsp;с
| β+ (?%)
| 125La
| rowspan=2|(7/2−)
| rowspan=2|
| rowspan=2|
|-
| β+, p (?%)
| 124Ba
|-id=Цериум-125m
| style="text-indent:1em" | 125mCe
| colspan="3" style="text-indent:2em" | 93,6(4)&nbsp;keV
| 13(10)&nbsp;с
| IT
| 125Ce
| (1/2+)
|
|
|-id=Цериум-126
| 126Ce
| style="text-align:right" | 58
| style="text-align:right" | 68
| 125,923971(30)
| 51,0(3)&nbsp;с
| β+
| 126La
| 0+
|
|
|-id=Цериум-127
| 127Ce
| style="text-align:right" | 58
| style="text-align:right" | 69
| 126,922727(31)
| 34(2)&nbsp;с
| β+
| 127La
| (1/2+)
|
|
|-id=Цериум-127m1
| style="text-indent:1em" | 127m1Ce
| colspan="3" style="text-indent:2em" | 7,3(11)&nbsp;keV
| 28,6(7)&nbsp;с
| β+
| 127La
| (5/2+)
|
|
|-id=Цериум-127m2
| style="text-indent:1em" | 127m2Ce
| colspan="3" style="text-indent:2em" | 36,9(11)&nbsp;keV
| >10&nbsp;μs
| IT
| 127Ce
| (7/2−)
|
|
|-id=Цериум-128
| 128Ce
| style="text-align:right" | 58
| style="text-align:right" | 70
| 127,918911(30)
| 3,93(2)&nbsp;мин
| β+
| 128La
| 0+
|
|
|-id=Цериум-129
| 129Ce
| style="text-align:right" | 58
| style="text-align:right" | 71
| 128,918102(30)
| 3,5(3)&nbsp;мин
| β+
| 129La
| (5/2+)
|
|
|-id=Цериум-130
| 130Ce
| style="text-align:right" | 58
| style="text-align:right" | 72
| 129,914736(30)
| 22,9(5)&nbsp;мин
| β+
| 130La
| 0+
|
|
|-id=Цериум-130m
| style="text-indent:1em" | 130mCe
| colspan="3" style="text-indent:2em" | 2453,6(3)&nbsp;keV
| 100(8)&nbsp;нс
| IT
| 130Ce
| 7−
|
|
|-id=Цериум-131
| 131Ce
| style="text-align:right" | 58
| style="text-align:right" | 73
| 130,914429(35)
| 10,3(3)&nbsp;мин
| β+
| 131La
| 7/2+
|
|
|-id=Цериум-131m
| style="text-indent:1em" | 131mCe
| colspan="3" style="text-indent:2em" | 63,09(9)&nbsp;keV
| 5,4(4)&nbsp;мин
| β+
| 131La
| (1/2+)
|
|
|-id=Цериум-132
| 132Ce
| style="text-align:right" | 58
| style="text-align:right" | 74
| 131,911466(22)
| 3,51(11)&nbsp;ч
| β+
| 132La
| 0+
|
|
|-id=Цериум-132m
| style="text-indent:1em" | 132mCe
| colspan="3" style="text-indent:2em" | 2341,15(21)&nbsp;keV
| 9,4(3)&nbsp;мс
| IT
| 132Ce
| 8−
|
|
|-id=Цериум-133
| 133Ce
| style="text-align:right" | 58
| style="text-align:right" | 75
| 132,911520(18)
| 97(4)&nbsp;мин
| β+
| 133La
| 1/2+
|
|
|-id=Цериум-133m
| style="text-indent:1em" | 133mCe
| colspan="3" style="text-indent:2em" | 37,2(7)&nbsp;keV
| 5,1(3)&nbsp;ч
| β+
| 133La
| 9/2−
|
|
|-id=Цериум-134
| 134Ce
| style="text-align:right" | 58
| style="text-align:right" | 76
| 133,908928(22)
| 3,16(4)&nbsp;д
| EC
| 134La
| 0+
|
|
|-id=Цериум-134m
| style="text-indent:1em" | 134mCe
| colspan="3" style="text-indent:2em" | 3208,6(4)&nbsp;keV
| 308(5)&nbsp;нс
| IT
| 134Ce
| 10+
|
|
|-id=Цериум-135
| 135Ce
| style="text-align:right" | 58
| style="text-align:right" | 77
| 134,909161(11)
| 17,7(3)&nbsp;ч
| β+
| 135La
| 1/2+
|
|
|-id=Цериум-135m
| style="text-indent:1em" | 135mCe
| colspan="3" style="text-indent:2em" | 445,81(21)&nbsp;keV
| 20(1)&nbsp;с
| IT
| 135Ce
| (11/2−)
|
|
|-id=Цериум-136
| 136Ce
| style="text-align:right" | 58
| style="text-align:right" | 78
| 135,90712926(35)
| colspan=3 align=center|**[[Опсервациски стабилен]]**
| 0+
| 0,00186(2)
| 
|-id=Цериум-136m
| style="text-indent:1em" | 136mCe
| colspan="3" style="text-indent:2em" | 3095,0(6)&nbsp;keV
| 1,96(9)&nbsp;μs
| IT
| **<sup>136</sup>Ce**
| 10+
|
|
|-id=Цериум-137
| 137Ce
| style="text-align:right" | 58
| style="text-align:right" | 79
| 136,90776242(39)
| 9,0(3)&nbsp;ч
| β+
| 137La
| 3/2+
| 
| 
|-id=Цериум-137m
| rowspan=2 style="text-indent:1em" | 137mCe
| rowspan=2 colspan="3" style="text-indent:2em" | 254,29(5)&nbsp;keV
| rowspan=2|34,4(3)&nbsp;ч
| IT (99,21%)
| 137Ce
| rowspan=2|11/2−
| rowspan=2|
| rowspan=2|
|-
| β+ (0,79%)
| 137La
|-id=Цериум-138
| 138Ce
| style="text-align:right" | 58
| style="text-align:right" | 80
| 137,90599418(54)
| colspan=3 align=center|**Опсервациски стабилен**
| 0+
| 0,00251(2)
| 
|-id=Цериум-138m
| style="text-indent:1em" | 138mCe
| colspan="3" style="text-indent:2em" | 2129,28(12)&nbsp;keV
| 8,73(20)&nbsp;мс
| IT
| **<sup>138</sup>Ce**
| 7-
|
|
|-id=Цериум-139
| 139Ce
| style="text-align:right" | 58
| style="text-align:right" | 81
| 138,9066470(22)
| 137,642(20)&nbsp;д
| EC
| **<sup>139</sup>La**
| 3/2+
|
|
|-id=Цериум-139m
| style="text-indent:1em" | 139mCe
| colspan="3" style="text-indent:2em" | 754,24(8)&nbsp;keV
| 57,58(32)&nbsp;с
| IT
| 139Ce
| 11/2−
|
|
|-id=Цериум-140
| 140Ce
| style="text-align:right" | 58
| style="text-align:right" | 82
| 139,9054484(14)
| colspan=3 align=center|**Стабилен**
| 0+
| 0,88449(51)
| 
|-id=Цериум-140m
| style="text-indent:1em" | 140mCe
| colspan="3" style="text-indent:2em" | 2107,854(24)&nbsp;keV
| 7,3(15)&nbsp;μs
| IT
| **<sup>140</sup>Ce**
| 6+
|
|
|-id=Цериум-141
| 141Ce
| style="text-align:right" | 58
| style="text-align:right" | 83
| 140,9082860(14)
| 32,505(10)&nbsp;д
| β−
| **<sup>141</sup>Pr**
| 7/2−
|
|
|-id=Цериум-142
| 142Ce
| style="text-align:right" | 58
| style="text-align:right" | 84
| 141,9092502(26)
| colspan=3 align=center|**Опсервациски стабилен**
| 0+
| 0,11114(51)
| 
|-id=Цериум-143
| 143Ce
| style="text-align:right" | 58
| style="text-align:right" | 85
| 142,9123920(26)
| 33,039(6)&nbsp;ч
| β−
| 143Pr
| 3/2−
|
|
|-id=Цериум-144
| 144Ce
| style="text-align:right" | 58
| style="text-align:right" | 86
| 143,9136528(30)
| 284,886(25)&nbsp;д
| β−
| 144Pr
| 0+
|
|
|-id=Цериум-145
| 145Ce
| style="text-align:right" | 58
| style="text-align:right" | 87
| 144,917265(36)
| 3,01(6)&nbsp;мин
| β−
| 145Pr
| 5/2−#
|
|
|-id=Цериум-146
| 146Ce
| style="text-align:right" | 58
| style="text-align:right" | 88
| 145,918812(16)
| 13,49(16)&nbsp;мин
| β−
| 146Pr
| 0+
|
|
|-id=Цериум-147
| 147Ce
| style="text-align:right" | 58
| style="text-align:right" | 89
| 146,9226899(92)
| 56,4(10)&nbsp;с
| β−
| 147Pr
| (5/2−)
|
|
|-id=Цериум-148
| 148Ce
| style="text-align:right" | 58
| style="text-align:right" | 90
| 147,924424(12)
| 56,8(3)&nbsp;с
| β−
| 148Pr
| 0+
|
|
|-id=Цериум-149
| 149Ce
| style="text-align:right" | 58
| style="text-align:right" | 91
| 148,928427(11)
| 4,94(4)&nbsp;с
| β−
| 149Pr
| 3/2−#
|
|
|-id=Цериум-150
| 150Ce
| style="text-align:right" | 58
| style="text-align:right" | 92
| 149,930384(13)
| 6,05(7)&nbsp;с
| β−
| 150Pr
| 0+
|
|
|-id=Цериум-151
| 151Ce
| style="text-align:right" | 58
| style="text-align:right" | 93
| 150,934272(19)
| 1,76(6)&nbsp;с
| β−
| 151Pr
| (3/2−)
|
|
|-id=Цериум-152
| 152Ce
| style="text-align:right" | 58
| style="text-align:right" | 94
| 151,93668(22)#
| 1,42(2)&nbsp;с
| β−
| 152Pr
| 0+
|
|
|-id=Цериум-153
| 153Ce
| style="text-align:right" | 58
| style="text-align:right" | 95
| 152,94105(22)#
| 865(25)&nbsp;мс
| β−
| 153Pr
| 3/2−#
|
|
|-id=Цериум-154
| 154Ce
| style="text-align:right" | 58
| style="text-align:right" | 96
| 153,94394(22)#
| 722(14)&nbsp;мс
| β−
| 154Pr
| 0+
|
|
|-id=Цериум-155
| 155Ce
| style="text-align:right" | 58
| style="text-align:right" | 97
| 154,94871(32)#
| 313(7)&nbsp;мс
| β−
| 155Pr
| 5/2−#
|
|
|-id=Цериум-156
| 156Ce
| style="text-align:right" | 58
| style="text-align:right" | 98
| 155,95188(32)#
| 233(9)&nbsp;мс
| β−
| 156Pr
| 0+
|
|
|-id=Цериум-157
| 157Ce
| style="text-align:right" | 58
| style="text-align:right" | 99
| 156,95713(43)#
| 175(41)&nbsp;мс
| β−
| 157Pr
| 7/2+#
|
|
|-id=Цериум-158
| 158Ce
| style="text-align:right" | 58
| style="text-align:right" | 100
| 157,96077(43)#
| 99(93)&nbsp;мс
| β−
| 158Pr
| 0+
|
|

## Наводи

* Isotope masses from:
**
* Isotopic compositions and standard atomic masses from:
**
**
* Half-life, spin, and isomer data selected from the following sources.
**
**
**

Цериум
Категорија:Цериум
Категорија:Изотопи на цериумот