Isotop disprosium

**[[Disprosium]]** (**<sub>66</sub>Dy**) yang terbentuk secara alami terdiri dari tujuh isotop stabil, 156Dy, 158Dy, 160Dy, 161Dy, 162Dy, 163Dy dan 164Dy, dengan 164Dy sebagai yang paling melimpah (28,18% kelimpahan alami). Dua puluh sembilan radioisotop telah dikarakterisasi, dengan yang paling stabil adalah 154Dy dengan waktu paruh 3,0 juta tahun, 159Dy dengan waktu paruh 144,4 hari, dan 166Dy dengan waktu paruh 81,6 jam. Semua isotop radioaktif yang tersisa memiliki waktu paruh kurang dari 10 jam, dan sebagian besar memiliki waktu paruh kurang dari 30 detik. Unsur ini juga memiliki 12 keadaan meta, dengan yang paling stabil adalah 165mDy (waktu paruh 1,257 menit), 147mDy (waktu paruh 55,7 detik) dan 145mDy (waktu paruh 13,6 detik).

Mode peluruhan utama sebelum isotop stabil yang paling melimpah, 164Dy, adalah penangkapan elektron, dan mode utama sesudahnya adalah peluruhan beta. Produk peluruhan utama sebelum 164Dy adalah isotop terbium, dan produk utama sesudahnya adalah isotop holmium. Disprosium merupakan unsur terberat yang memiliki isotop yang diprediksi benar-benar stabil dan bukannya hanya isotop stabil secara pengamatan yang diprediksi akan menjadi radioaktif.

## Daftar isotop

|-
| 138Dy
| style="text-align:right" | 66
| style="text-align:right" | 72
| 137,96249(64)#
| 200#&nbsp;mdtk
|
|
| 0+
|
|
|-
| 139Dy
| style="text-align:right" | 66
| style="text-align:right" | 73
| 138,95954(54)#
| 600(200)&nbsp;mdtk
|
|
| 7/2+#
|
|
|-
| 140Dy
| style="text-align:right" | 66
| style="text-align:right" | 74
| 139,95401(54)#
| 700#&nbsp;mdtk
| β<sup>+</sup>
| 140Tb
| 0+
|
|
|-
| style="text-indent:1em" | 140mDy
| colspan="3" style="text-indent:2em" | 2166,1(5)&nbsp;keV
| 7,0(5)&nbsp;μdtk
|
|
| (8−)
|
|
|-
| rowspan=2|141Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 75
| rowspan=2|140,95135(32)#
| rowspan=2|0,9(2)&nbsp;dtk
| β+
| 141Tb
| rowspan=2|(9/2−)
| rowspan=2|
| rowspan=2|
|-
| β+, p (langka)
| 140Gd
|-
| rowspan=2|142Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 76
| rowspan=2|141,94637(39)#
| rowspan=2|2,3(3)&nbsp;dtk
| β+ (99,94%)
| 142Tb
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| β+, p (0,06%)
| 141Gd
|-
| rowspan=2|143Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 77
| rowspan=2|142,94383(21)#
| rowspan=2|5,6(10)&nbsp;dtk
| β+
| 143Tb
| rowspan=2|(1/2+)
| rowspan=2|
| rowspan=2|
|-
| β+, p (langka)
| 142Gd
|-
| style="text-indent:1em" | 143mDy
| colspan="3" style="text-indent:2em" | 310,7(6)&nbsp;keV
| 3,0(3)&nbsp;dtk
|
|
| (11/2−)
|
|
|-
| rowspan=2|144Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 78
| rowspan=2|143,93925(3)
| rowspan=2|9,1(4)&nbsp;dtk
| β+
| 144Tb
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| β+, p (langka)
| 143Gd
|-
| rowspan=2|145Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 79
| rowspan=2|144,93743(5)
| rowspan=2|9,5(10)&nbsp;dtk
| β+
| 145Tb
| rowspan=2|(1/2+)
| rowspan=2|
| rowspan=2|
|-
| β+, p (langka)
| 144Gd
|-
| style="text-indent:1em" | 145mDy
| colspan="3" style="text-indent:2em" | 118,2(2)&nbsp;keV
| 14,1(7)&nbsp;dtk
| β+
| 145Tb
| (11/2−)
|
|
|-
| 146Dy
| style="text-align:right" | 66
| style="text-align:right" | 80
| 145,932845(29)
| 33,2(7)&nbsp;dtk
| β+
| 146Tb
| 0+
|
|
|-
| style="text-indent:1em" | 146mDy
| colspan="3" style="text-indent:2em" | 2935,7(6)&nbsp;keV
| 150(20)&nbsp;mdtk
| IT
| 146Dy
| (10+)#
|
|
|-
| rowspan=2|147Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 81
| rowspan=2|146,931092(21)
| rowspan=2|40(10)&nbsp;dtk
| β+ (99,95%)
| 147Tb
| rowspan=2|1/2+
| rowspan=2|
| rowspan=2|
|-
| β+, p (0,05%)
| 146Tb
|-
| rowspan=2 style="text-indent:1em" | 147m1Dy
| rowspan=2 colspan="3" style="text-indent:2em" | 750,5(4)&nbsp;keV
| rowspan=2|55(1)&nbsp;dtk
| β+ (65%)
| 147Tb
| rowspan=2|11/2−
| rowspan=2|
| rowspan=2|
|-
| IT (35%)
| 147Dy
|-
| style="text-indent:1em" | 147m2Dy
| colspan="3" style="text-indent:2em" | 3407,2(8)&nbsp;keV
| 0,40(1)&nbsp;μdtk
|
|
| (27/2−)
|
|
|-
| 148Dy
| style="text-align:right" | 66
| style="text-align:right" | 82
| 147,927150(11)
| 3,3(2)&nbsp;mnt
| β+
| 148Tb
| 0+
|
|
|-
| 149Dy
| style="text-align:right" | 66
| style="text-align:right" | 83
| 148,927305(9)
| 4,20(14)&nbsp;mnt
| β+
| 149Tb
| 7/2(−)
|
|
|-
| rowspan=2 style="text-indent:1em" | 149mDy
| rowspan=2 colspan="3" style="text-indent:2em" | 2661,1(4)&nbsp;keV
| rowspan=2|490(15)&nbsp;mdtk
| IT (99,3%)
| 149Dy
| rowspan=2|(27/2−)
| rowspan=2|
| rowspan=2|
|-
| β+ (0,7%)
| 149Tb
|-
| rowspan=2|150Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 84
| rowspan=2|149,925585(5)
| rowspan=2|7,17(5)&nbsp;mnt
| β+ (64%)
| 150Tb
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| α (36%)
| 146Gd
|-
| rowspan=2|151Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 85
| rowspan=2|150,926185(4)
| rowspan=2|17,9(3)&nbsp;mnt
| β+ (94,4%)
| 151Tb
| rowspan=2|7/2(−)
| rowspan=2|
| rowspan=2|
|-
| α (5,6%)
| 147Gd
|-
| rowspan=2|152Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 86
| rowspan=2|151,924718(6)
| rowspan=2|2,38(2)&nbsp;jam
| EC (99,9%)
| 152Tb
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| α (0,1%)
| 148Gd
|-
| rowspan=2|153Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 87
| rowspan=2|152,925765(5)
| rowspan=2|6,4(1)&nbsp;jam
| β+ (99,99%)
| 153Tb
| rowspan=2|7/2(−)
| rowspan=2|
| rowspan=2|
|-
| α (0,00939%)
| 149Gd
|-
| rowspan=2|154Dy
| rowspan=2 style="text-align:right" | 66
| rowspan=2 style="text-align:right" | 88
| rowspan=2|153,924424(8)
| rowspan=2|3,0(15) thn
| α
| 150Gd
| rowspan=2|0+
| rowspan=2|
| rowspan=2|
|-
| β+β+ (langka)
| **<sup>154</sup>Gd**
|-
| 155Dy
| style="text-align:right" | 66
| style="text-align:right" | 89
| 154,925754(13)
| 9,9(2)&nbsp;jam
| β+
| 155Tb
| 3/2−
|
|
|-
| style="text-indent:1em" | 155mDy
| colspan="3" style="text-indent:2em" | 234,33(3)&nbsp;keV
| 6(1)&nbsp;μdtk
|
|
| 11/2−
|
|
|-
| 156Dy
| style="text-align:right" | 66
| style="text-align:right" | 90
| 155,924283(7)
| colspan=3 align=center|**[[Stabil Secara Pengamatan]]**
| 0+
| 5,6(3)
|
|-
| 157Dy
| style="text-align:right" | 66
| style="text-align:right" | 91
| 156,925466(7)
| 8,14(4)&nbsp;jam
| β+
| 157Tb
| 3/2−
|
|
|-
| style="text-indent:1em" | 157m1Dy
| colspan="3" style="text-indent:2em" | 161,99(3)&nbsp;keV
| 1,3(2)&nbsp;μdtk
|
|
| 9/2+
|
|
|-
| style="text-indent:1em" | 157m2Dy
| colspan="3" style="text-indent:2em" | 199,38(7)&nbsp;keV
| 21,6(16)&nbsp;mdtk
| IT
| 157Dy
| 11/2−
|
|
|-
| 158Dy
| style="text-align:right" | 66
| style="text-align:right" | 92
| 157,924409(4)
| colspan=3 align=center|**Stabil Secara Pengamatan**
| 0+
| 9,5(3)
|
|-
| 159Dy
| style="text-align:right" | 66
| style="text-align:right" | 93
| 158,9257392(29)
| 144,4(2)&nbsp;hri
| EC
| **<sup>159</sup>Tb**
| 3/2−
|
|
|-
| style="text-indent:1em" | 159mDy
| colspan="3" style="text-indent:2em" | 352,77(14)&nbsp;keV
| 122(3)&nbsp;μdtk
|
|
| 11/2−
|
|
|-
| 160Dy
| style="text-align:right" | 66
| style="text-align:right" | 94
| 159.9251975(27)
| colspan=3 align=center|**Stabil Secara Pengamatan**
| 0+
| 0,02329(18)
|
|-
| 161Dy
| style="text-align:right" | 66
| style="text-align:right" | 95
| 160,9269334(27)
| colspan=3 align=center|**Stabil Secara Pengamatan**
| 5/2+
| 0,18889(42)
|
|-
| 162Dy
| style="text-align:right" | 66
| style="text-align:right" | 96
| 161.9267984(27)
| colspan=3 align=center|**Stabil Secara Pengamatan**
| 0+
| 0,25475(36)
|
|-
| 163Dy
| style="text-align:right" | 66
| style="text-align:right" | 97
| 162,9287312(27)
| colspan=3 align=center|**Stabil**
| 5/2−
| 0,24896(42)
|
|-
| 164Dy
| style="text-align:right" | 66
| style="text-align:right" | 98
| 163,9291748(27)
| colspan=3 align=center|**Stabil**
| 0+
| 0,28260(54)
|
|-
| 165Dy
| style="text-align:right" | 66
| style="text-align:right" | 99
| 164,9317033(27)
| 2,334(1)&nbsp;jam
| β−
| **<sup>165</sup>Ho**
| 7/2+
|
|
|-
| rowspan=2 style="text-indent:1em" | 165mDy
| rowspan=2 colspan="3" style="text-indent:2em" | 108,160(3)&nbsp;keV
| rowspan=2|1,257(6)&nbsp;mnt
| IT (97,76%)
| 165Dy
| rowspan=2|1/2−
| rowspan=2|
| rowspan=2|
|-
| β− (2,24%)
| **<sup>165</sup>Ho**
|-
| 166Dy
| style="text-align:right" | 66
| style="text-align:right" | 100
| 165,9328067(28)
| 81,6(1)&nbsp;jam
| β−
| 166Ho
| 0+
|
|
|-
| 167Dy
| style="text-align:right" | 66
| style="text-align:right" | 101
| 166,93566(6)
| 6,20(8)&nbsp;mnt
| β−
| 167Ho
| (1/2−)
|
|
|-
| 168Dy
| style="text-align:right" | 66
| style="text-align:right" | 102
| 167,93713(15)
| 8,7(3)&nbsp;mnt
| β−
| 168Ho
| 0+
|
|
|-
| 169Dy
| style="text-align:right" | 66
| style="text-align:right" | 103
| 168,94031(32)
| 39(8)&nbsp;dtk
| β−
| 169Ho
| (5/2−)
|
|
|-
| 170Dy
| style="text-align:right" | 66
| style="text-align:right" | 104
| 169,94239(21)#
| 30# dtk
| β−
| 170Ho
| 0+
|
|
|-
| 171Dy
| style="text-align:right" | 66
| style="text-align:right" | 105
| 170,94620(32)#
| 6# dtk
| β−
| 171Ho
| 7/2−#
|
|
|-
| 172Dy
| style="text-align:right" | 66
| style="text-align:right" | 106
| 171,94876(43)#
| 3# dtk
| β−
| 172Ho
| 0+
|
|
|-
| 173Dy
| style="text-align:right" | 66
| style="text-align:right" | 107
| 172,95300(54)#
| 2# dtk
| β−
| 173Ho
| 9/2+#
|
|

* Sampel geologis yang luar biasa ditemukan terkait dengan reaktor fisi nuklir alami Oklo, di mana komposisi isotop berada di luar kisaran yang dilaporkan. Ketidakpastian dalam massa atom dapat melebihi nilai yang dinyatakan untuk spesimen tersebut.

## Disprosium-165

Isotop radioaktif 165Dy, dengan waktu paruh 2,334 jam, memiliki kegunaan dalam radiofarmasi.

## Referensi

* Massa isotop dari:
**
* Komposisi isotop dan massa atom standar dari:
**
**
* Data waktu paruh, spin, dan isomer dipilih dari sumber-sumber berikut.
**
**
**