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Isotopes of Gadolinium (Z=64)
Click on an isotope to get more information about its decay
Isotope	Half-life	Spin Parity	Decay Mode(s) or Abundance
¹³⁶Gd
¹³⁷Gd	7 s		%EC+%B+=100
¹³⁸Gd		0+
¹³⁹Gd	4.9 s	9/2-	%EC+%B+=?, %B+P=?
¹⁴⁰Gd	15.8 s	0+	%EC+%B+=100
¹⁴¹Gd	14 s	(1/2+)	%EC+%B+=100, %ECP=0.03 1
^141m1Gd	24.5 s	(11/2-)	%EC+%B+=89 2, %IT=11 2
¹⁴²Gd	70.2 s	0+	%EC+%B+=100
¹⁴³Gd	39 s	(1/2)+	%EC+%B+=100, %ECP < 0.001
^143m1Gd	112 s	(11/2-)	%EC+%B+=100
¹⁴⁴Gd	4.5 m	0+	%EC+%B+=100
¹⁴⁵Gd	23.0 m	1/2+	%EC+%B+=100
^145m1Gd	85 s	11/2-	%IT=94.3 5 , %EC+%B+=5.7 5
¹⁴⁶Gd	48.27 d	0+	%EC=100
¹⁴⁷Gd	38.06 h	7/2-	%EC+%B+=100
¹⁴⁸Gd	74.6 y	0+	%A=100
¹⁴⁹Gd	9.28 d	7/2-	%EC+%B+=100, %A=4.3E-4 10
¹⁵⁰Gd	1.79e6 y	0+	%A=100
¹⁵¹Gd	124 d	7/2-	%EC=100, %A ~ 8E-7
¹⁵²Gd	1.08e14 y	0+	%Abundance=0.20 1, %A=100
¹⁵³Gd	240.4 d	3/2-	%EC=100
¹⁵⁴Gd	stable	0+	%Abundance=2.18 3
¹⁵⁵Gd	stable	3/2-	%Abundance=14.80 5
^155m1Gd	31.97 ms	11/2-	%IT=100
¹⁵⁶Gd	stable	0+	%Abundance=20.47 4
¹⁵⁷Gd	stable	3/2-	%Abundance=15.65 3
¹⁵⁸Gd	stable	0+	%Abundance=24.84 12
¹⁵⁹Gd	18.479 h	3/2-	%B-=100
¹⁶⁰Gd	stable	0+	%Abundance=21.86 4
¹⁶¹Gd	3.66 m	5/2-	%B-=100
¹⁶²Gd	8.4 m	0+	%B-=100
¹⁶³Gd	68 s	(5/2-)	%B-=100
¹⁶⁴Gd	45 s	0+	%B-=100
¹⁶⁵Gd
¹⁶⁶Gd		0+
¹⁶⁷Gd
¹⁶⁸Gd		0+
¹⁶⁹Gd

Isotopes of Gadolinium (Z=64)