Isotopes of Samarium

List of known isotopes of the element Samarium.

Isotope	t½	%	Spin/parity	Radius	Isotopic mass	Discovery
¹²⁹Sm	0.55 ±10 s	syn.	(1/2+ 3/2+)	—	1.289·10⁸ ±537 keV/c²	1999
¹³⁰Sm	stab.	syn.	0+	—	1.299·10⁸ ±429 keV/c²	1999
¹³¹Sm	1.2 ±2 s	syn.	—	—	1.309·10⁸ ±429 keV/c²	1986
¹³²Sm	4 ±3 s	syn.	0+	—	1.319·10⁸ ±322 keV/c²	1989
¹³³Sm	2.89 ±16 s	syn.	(5/2+)	—	1.329·10⁸ ±320 keV/c²	1977
¹³⁴Sm	9.5 ±8 s	syn.	0+	—	1.339·10⁸ ±210 keV/c²	1977
¹³⁵Sm	10.3 ±5 s	syn.	(3/2+ 5/2+)	—	1.349·10⁸ ±166 keV/c²	1977
¹³⁶Sm	47 ±2 s	syn.	0+	—	1.359·10⁸ ±13.41 keV/c²	1982
¹³⁷Sm	45 ±1 s	syn.	(9/2-)	—	1.369·10⁸ ±30.71 keV/c²	1986
¹³⁸Sm	3.1 ±2 m	syn.	0+	4.959 ±0.0034 fm	1.379·10⁸ ±12.68 keV/c²	1982
¹³⁹Sm	2.57 ±10 m	syn.	1/2+	4.955 ±0.0034 fm	1.389·10⁸ ±11.68 keV/c²	1971
¹⁴⁰Sm	14.82 ±12 m	syn.	0+	4.956 ±0.0034 fm	1.399·10⁸ ±13.41 keV/c²	1967
¹⁴¹Sm	10.2 ±2 m	syn.	1/2+	4.951 ±0.0034 fm	1.409·10⁸ ±9.162 keV/c²	1967
¹⁴²Sm	72.49 ±5 m	syn.	0+	4.951 ±0.0034 fm	1.419·10⁸ ±2.002 keV/c²	1959
¹⁴³Sm	8.75 ±6 m	syn.	3/2+	4.947 ±0.0034 fm	1.429·10⁸ ±2.951 keV/c²	1956
¹⁴⁴Sm	stab.	3.08 ±0.04 %	0+	4.952 ±0.0034 fm	1.439·10⁸ ±1.566 keV/c²	1933
¹⁴⁵Sm	340 ±3 d	syn.	7/2-	4.965 ±0.0034 fm	1.449·10⁸ ±1.594 keV/c²	1947
¹⁴⁶Sm	6.8·10⁷ ±7 a	syn.	0+	4.98 ±0.0035 fm	1.459·10⁸ ±3.269 keV/c²	1953
¹⁴⁷Sm	1.073·10¹¹ ±10 a	15 ±0.14 %	7/2-	4.989 ±0.0035 fm	1.469·10⁸ ±1.354 keV/c²	1933
¹⁴⁸Sm	7·10¹⁵ ±3 a	11.25 ±0.09 %	0+	5.004 ±0.0034 fm	1.479·10⁸ ±1.337 keV/c²	1933
¹⁴⁹Sm	stab.	13.82 ±0.1 %	7/2-	5.013 ±0.0035 fm	1.489·10⁸ ±1.241 keV/c²	1933
¹⁵⁰Sm	stab.	7.37 ±0.09 %	0+	5.038 ±0.0048 fm	1.499·10⁸ ±1.193 keV/c²	1934
¹⁵¹Sm	90 ±8 a	syn.	5/2-	5.055 ±0.0057 fm	1.509·10⁸ ±1.191 keV/c²	1947
¹⁵²Sm	stab.	26.74 ±0.09 %	0+	5.081 ±0.006 fm	1.519·10⁸ ±1.09 keV/c²	1933
¹⁵³Sm	46.28 ±4 h	syn.	3/2+	5.092 ±0.0068 fm	1.529·10⁸ ±1.1 keV/c²	1938
¹⁵⁴Sm	stab.	22.74 ±0.14 %	0+	5.105 ±0.0067 fm	1.539·10⁸ ±1.4 keV/c²	1933
¹⁵⁵Sm	22.18 ±6 m	syn.	3/2-	—	1.549·10⁸ ±1.429 keV/c²	1951
¹⁵⁶Sm	9.4 ±2 h	syn.	0+	—	1.559·10⁸ ±9.148 keV/c²	1951
¹⁵⁷Sm	8.03 ±7 m	syn.	(3/2-)	—	1.569·10⁸ ±4.759 keV/c²	1973
¹⁵⁸Sm	5.3 ±3 m	syn.	0+	—	1.579·10⁸ ±5.133 keV/c²	1970
¹⁵⁹Sm	11.37 ±15 s	syn.	5/2-	—	1.589·10⁸ ±6.37 keV/c²	1986
¹⁶⁰Sm	9.6 ±3 s	syn.	0+	—	1.599·10⁸ ±2.1 keV/c²	1986
¹⁶¹Sm	4.8 ±4 s	syn.	—	—	1.609·10⁸ ±7.318 keV/c²	1998
¹⁶²Sm	2.4 ±5 s	syn.	0+	—	1.619·10⁸ ±3.782 keV/c²	2005
¹⁶³Sm	1.23 ± s	syn.	(1/2-)	—	1.629·10⁸ ±7.9 keV/c²	2012
¹⁶⁴Sm	1.43 ±24 s	syn.	0+	—	1.639·10⁸ ±4.4 keV/c²	2012
¹⁶⁵Sm	0.98 ±21 s	syn.	(5/2-)	—	1.649·10⁸ ±429 keV/c²	2012
¹⁶⁶Sm	0.8 ±63 s	syn.	0+	—	1.659·10⁸ ±429 keV/c²	2017
¹⁶⁷Sm	stab.	syn.	—	—	1.669·10⁸ ±537 keV/c²	2018
¹⁶⁸Sm	stab.	syn.	0+	—	1.679·10⁸ ±322 keV/c²	2018

129SmSamarium-129

Classification	z: 62; n: 67; m: 129
Half life	0.55 ±10 s
Natural abundance	synthetic nuclide
Spin/parity	(1/2+ 3/2+)
Decay modes	electron capture + β⁺ decay; electron capture + proton emission
Discovery	1999
Mass excess	-42,330 ±500 keV
Binding energy	8,023 ±4 keV
Single-particle energy	1,399 ±583 keV
Neutron separation energy	11,250 ±707 keV
Q value for electron capture	10,850 ±583 keV

Point at nuclide Decay chain of Samarium-129

130SmSamarium-130

Classification	z: 62; n: 68; m: 130
Half life	stable nuclide
Natural abundance	synthetic nuclide
Spin/parity	0+
Discovery	1999
Mass excess	-47,700 ±400 keV
Binding energy	8,065 ±3 keV
Single-particle energy	1,809 ±500 keV
Neutron separation energy	13,440 ±640 keV
Q value for electron capture	7,770 ±447.2 keV
β⁻ decay energy	-14,190 ±671 keV

Point at nuclide

131SmSamarium-131

Classification	z: 62; n: 69; m: 131
Half life	1.2 ±2 s
Natural abundance	synthetic nuclide
Decay modes	electron capture + β⁺ decay; electron capture + proton emission
Discovery	1986
Mass excess	-50,280 ±400 keV
Binding energy	8,085 ±3 keV
Single-particle energy	2,100 ±447 keV
Neutron separation energy	10,650 ±565 keV
Q value for electron capture	9,490 ±447.2 keV
β⁻ decay energy	-10,820 ±565 keV
β⁻ decay energy with neutron	-24,840 ±671 keV

Point at nuclide Decay chain of Samarium-131

132SmSamarium-132

Classification	z: 62; n: 70; m: 132
Half life	4 ±3 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay; electron capture + proton emission
Discovery	1989
Mass excess	-55,140 ±300 keV
Binding energy	8,122 ±2 keV
Single-particle energy	2,659 ±361 keV
Neutron separation energy	12,930 ±500 keV
Q value for electron capture	6,488 ±334.9 keV
β⁻ decay energy	-12,940 ±500 keV
β⁻ decay energy with neutron	-23,750 ±500 keV

Point at nuclide Decay chain of Samarium-132

133SmSamarium-133

Classification	z: 62; n: 71; m: 133
Half life	2.89 ±16 s
Natural abundance	synthetic nuclide
Spin/parity	(5/2+)
Decay modes	electron capture + β⁺ decay; electron capture + proton emission
Discovery	1977
Mass excess	-57,240 ±298 keV
Binding energy	8,137 ±2 keV
Single-particle energy	2,892 ±333 keV
Neutron separation energy	10,160 ±423 keV
Q value for electron capture	8,176 ±302.2 keV
β⁻ decay energy	-9,995 ±422 keV
β⁻ decay energy with neutron	-23,110 ±499 keV

Point at nuclide Decay chain of Samarium-133

134SmSamarium-134

Classification	z: 62; n: 72; m: 134
Half life	9.5 ±8 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay
Discovery	1977
Mass excess	-61,380 ±196 keV
Binding energy	8,167 ±1 keV
Single-particle energy	3,257 ±202 keV
Neutron separation energy	12,210 ±357 keV
Q value for electron capture	5,387 ±200.4 keV
β⁻ decay energy	-11,580 ±358 keV
β⁻ decay energy with neutron	-22,220 ±357 keV

Point at nuclide Decay chain of Samarium-134

135SmSamarium-135

Classification	z: 62; n: 73; m: 135
Half life	10.3 ±5 s
Natural abundance	synthetic nuclide
Spin/parity	(3/2+ 5/2+)
Decay modes	electron capture + β⁺ decay; electron capture + proton emission
Discovery	1977
Mass excess	-62,860 ±154.6 keV
Binding energy	8,177 ±1.145 keV
Single-particle energy	3,382 ±160.2 keV
Neutron separation energy	9,552 ±249 keV
Q value for electron capture	7,205 ±175.4 keV
β⁻ decay energy	-8,709 ±249 keV
β⁻ decay energy with neutron	-21,130 ±337 keV

Point at nuclide Decay chain of Samarium-135

136SmSamarium-136

Classification	z: 62; n: 74; m: 136
Half life	47 ±2 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay
Discovery	1982
Mass excess	-66,820 ±12.49 keV
Binding energy	8,205 ±0.0919 keV
Single-particle energy	4,037 ±83.83 keV
Neutron separation energy	12,020 ±155.1 keV
Q value for electron capture	4,359 ±70.19 keV
β⁻ decay energy	-10,570 ±196 keV
β⁻ decay energy with neutron	-20,740 ±196 keV

Point at nuclide Decay chain of Samarium-136

137SmSamarium-137

Classification	z: 62; n: 75; m: 137
Half life	45 ±1 s
Natural abundance	synthetic nuclide
Spin/parity	(9/2-)
Decay modes	electron capture + β⁺ decay
Discovery	1986
Mass excess	-68,000 ±28.61 keV
Binding energy	8,213 ±0.2089 keV
Single-particle energy	4,110 ±74.76 keV
Neutron separation energy	9,252 ±31.22 keV
Q value for electron capture	6,081 ±31.44 keV
β⁻ decay energy	-7,846 ±28.94 keV
β⁻ decay energy with neutron	-19,820 ±198 keV

Point at nuclide Decay chain of Samarium-137

138SmSamarium-138

Classification	z: 62; n: 76; m: 138
Half life	3.1 ±2 m
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay
Discovery	1982
Mass excess	-71,500 ±11.81 keV
Binding energy	8,237 ±0.0856 keV
Single-particle energy	4,713 ±17.59 keV
Neutron separation energy	11,570 ±30.95 keV
Q value for electron capture	3,416 ±16.56 keV
β⁻ decay energy	-9,749 ±30.34 keV
β⁻ decay energy with neutron	-19,430 ±12.6 keV

Point at nuclide Decay chain of Samarium-138

139SmSamarium-139

Classification	z: 62; n: 77; m: 139
Half life	2.57 ±10 m
Natural abundance	synthetic nuclide
Spin/parity	1/2+
Decay modes	electron capture + β⁺ decay
Discovery	1971
Mass excess	-72,390 ±10.88 keV
Binding energy	8,243 ±0.0783 keV
Single-particle energy	4,754 ±15.9 keV
Neutron separation energy	8,953 ±16.06 keV
Q value for electron capture	5,120 ±17.41 keV
β⁻ decay energy	-6,983 ±17.07 keV
β⁻ decay energy with neutron	-18,710 ±29.98 keV
Magnetic dipole moment	-0.53 ±0.02 μN

Point at nuclide Decay chain of Samarium-139

140SmSamarium-140

Classification	z: 62; n: 78; m: 140
Half life	14.82 ±12 m
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay
Discovery	1967
Mass excess	-75,460 ±12.49 keV
Binding energy	8,263 ±0.0893 keV
Single-particle energy	5,243 ±18.46 keV
Neutron separation energy	11,140 ±16.57 keV
Q value for electron capture	2,756 ±27.25 keV
β⁻ decay energy	-8,470 ±50 keV
β⁻ decay energy with neutron	-18,130 ±18.14 keV
Magnetic dipole moment	12.7 ±0.9 μN

Point at nuclide Decay chain of Samarium-140

141SmSamarium-141

Classification	z: 62; n: 79; m: 141
Half life	10.2 ±2 m
Natural abundance	synthetic nuclide
Spin/parity	1/2+
Decay modes	electron capture + β⁺ decay
Discovery	1967
Mass excess	-75,940 ±8.535 keV
Binding energy	8,265 ±0.0605 keV
Single-particle energy	5,010 ±25.68 keV
Neutron separation energy	8,549 ±15.13 keV
Q value for electron capture	4,588 ±16.37 keV
β⁻ decay energy	-6,009 ±14.28 keV
β⁻ decay energy with neutron	-17,020 ±52.24 keV
Magnetic dipole moment	-0.74 ±0.02 μN

Point at nuclide Decay chain of Samarium-141

142SmSamarium-142

Classification	z: 62; n: 80; m: 142
Half life	72.49 ±5 m
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay
Discovery	1959
Mass excess	-78,990 ±1.866 keV
Binding energy	8,285 ±0.0131 keV
Single-particle energy	5,747 ±14.09 keV
Neutron separation energy	11,110 ±8.614 keV
Q value for electron capture	2,159 ±23.67 keV
β⁻ decay energy	-7,673 ±30 keV
β⁻ decay energy with neutron	-17,130 ±12.75 keV

Point at nuclide Decay chain of Samarium-142

143SmSamarium-143

Classification	z: 62; n: 81; m: 143
Half life	8.75 ±6 m
Natural abundance	synthetic nuclide
Spin/parity	3/2+
Decay modes	electron capture + β⁺ decay
Discovery	1956
Mass excess	-79,520 ±2.75 keV
Binding energy	8,288 ±0.0192 keV
Single-particle energy	5,664 ±23.74 keV
Neutron separation energy	8,606 ±2.625 keV
Q value for electron capture	3,443 ±4.029 keV
β⁻ decay energy	-5,276 ±11.32 keV
β⁻ decay energy with neutron	-16,280 ±30.11 keV
Magnetic dipole moment	1.01 ±0.02 μN
Electric quadrupole moment	0.4 ±0.2 b

Point at nuclide Decay chain of Samarium-143

144SmSamarium-144

Classification	z: 62; n: 82; m: 144
Half life	stable nuclide
Natural abundance	3.08 ±0.04 %
Spin/parity	0+
Discovery	1933
Mass excess	-81,970 ±1.459 keV
Binding energy	8,303 ±0.0101 keV
Single-particle energy	6,293 ±2.715 keV
Neutron separation energy	10,510 ±2.348 keV
Q value for electron capture	-549.6 ±3.25 keV
β⁻ decay energy	-6,347 ±10.8 keV
β⁻ decay energy with neutron	-15,800 ±11.08 keV
Magnetic dipole moment	1.6 ±0.3 μN

Point at nuclide

145SmSamarium-145

Classification	z: 62; n: 83; m: 145
Half life	340 ±3 d
Natural abundance	synthetic nuclide
Spin/parity	7/2-
Decay modes	electron capture (EC)
Discovery	1947
Mass excess	-80,660 ±1.485 keV
Binding energy	8,293 ±0.0102 keV
Single-particle energy	6,524 ±2.671 keV
Neutron separation energy	6,757 ±0.2988 keV
Q value for electron capture	616 ±3.174 keV
β⁻ decay energy	-2,660 ±2.722 keV
β⁻ decay energy with neutron	-13,110 ±10.81 keV
Magnetic dipole moment	-1.12 ±0.011 μN
Electric quadrupole moment	-0.6 ±0.07 b

Point at nuclide Decay chain of Samarium-145

146SmSamarium-146

Classification	z: 62; n: 84; m: 146
Half life	6.8·10⁷ ±7 a
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	α decay
Discovery	1953
Mass excess	-81,000 ±3.045 keV
Binding energy	8,293 ±0.0209 keV
Single-particle energy	7,017 ±3.75 keV
Neutron separation energy	8,416 ±2.852 keV
Q value for electron capture	-1,542 ±5.2 keV
β⁻ decay energy	-3,879 ±5.868 keV
β⁻ decay energy with neutron	-11,080 ±3.924 keV

Point at nuclide Decay chain of Samarium-146

147SmSamarium-147

Classification	z: 62; n: 85; m: 147
Half life	1.073·10¹¹ ±10 a
Natural abundance	15 ±0.14 %
Spin/parity	7/2-
Decay modes	α decay
Discovery	1933
Mass excess	-79,270 ±1.262 keV
Binding energy	8,280 ±0.0086 keV
Single-particle energy	7,100 ±4.133 keV
Neutron separation energy	6,341 ±2.843 keV
Q value for electron capture	-224.1 ±1.803 keV
β⁻ decay energy	-1,722 ±2.283 keV
β⁻ decay energy with neutron	-10,220 ±5.954 keV
Magnetic dipole moment	-0.809 ±0.0014 μN
Electric quadrupole moment	-0.26 ±0.03 b

Point at nuclide Decay chain of Samarium-147

148SmSamarium-148

Classification	z: 62; n: 86; m: 148
Half life	7·10¹⁵ ±3 a
Natural abundance	11.25 ±0.09 %
Spin/parity	0+
Decay modes	α decay
Discovery	1933
Mass excess	-79,340 ±1.246 keV
Binding energy	8,279 ±0.0084 keV
Single-particle energy	7,583 ±0.3875 keV
Neutron separation energy	8,141 ±0.2706 keV
Q value for electron capture	-2,471 ±5.82 keV
β⁻ decay energy	-3,039 ±9.965 keV
β⁻ decay energy with neutron	-9,863 ±2.293 keV
Magnetic dipole moment	0.54 ±0.07 μN
Electric quadrupole moment	-1 ±0.3 b

Point at nuclide Decay chain of Samarium-148

149SmSamarium-149

Classification	z: 62; n: 87; m: 149
Half life	stable nuclide
Natural abundance	13.82 ±0.1 %
Spin/parity	7/2-
Discovery	1933
Mass excess	-77,140 ±1.157 keV
Binding energy	8,263 ±0.0078 keV
Single-particle energy	7,558 ±5.57 keV
Neutron separation energy	5,871 ±0.8862 keV
Q value for electron capture	-1,072 ±2.472 keV
β⁻ decay energy	-694.6 ±3.788 keV
β⁻ decay energy with neutron	-8,910 ±9.977 keV
Magnetic dipole moment	-0.6677 ±0.0011 μN
Electric quadrupole moment	0.075 ±0.008 b

Point at nuclide

150SmSamarium-150

Classification	z: 62; n: 88; m: 150
Half life	stable nuclide
Natural abundance	7.37 ±0.09 %
Spin/parity	0+
Discovery	1934
Mass excess	-77,060 ±1.112 keV
Binding energy	8,261 ±0.0074 keV
Single-particle energy	8,275 ±1.907 keV
Neutron separation energy	7,986 ±0.377 keV
Q value for electron capture	-3,454 ±20 keV
β⁻ decay energy	-2,259 ±6.18 keV
β⁻ decay energy with neutron	-8,682 ±3.778 keV
Magnetic dipole moment	0.82 ±0.14 μN
Electric quadrupole moment	-1.3 ±0.2 b

Point at nuclide

151SmSamarium-151

Classification	z: 62; n: 89; m: 151
Half life	90 ±8 a
Natural abundance	synthetic nuclide
Spin/parity	5/2-
Decay modes	β⁻ decay
Discovery	1947
Mass excess	-74,580 ±1.11 keV
Binding energy	8,243 ±0.0074 keV
Single-particle energy	8,268 ±20 keV
Neutron separation energy	5,596 ±0.1087 keV
Q value for electron capture	-1,191 ±4.74 keV
β⁻ decay energy	76.61 ±0.5375 keV
β⁻ decay energy with neutron	-7,856 ±6.18 keV
Magnetic dipole moment	-0.3605 ±6·10^-4 μN
Electric quadrupole moment	0.71 ±0.07 b

Point at nuclide Decay chain of Samarium-151

152SmSamarium-152

Classification	z: 62; n: 90; m: 152
Half life	stable nuclide
Natural abundance	26.74 ±0.09 %
Spin/parity	0+
Discovery	1933
Mass excess	-74,770 ±1.016 keV
Binding energy	8,244 ±0.0067 keV
Single-particle energy	8,665 ±4.516 keV
Neutron separation energy	8,257 ±0.6056 keV
Q value for electron capture	-3,509 ±25.92 keV
β⁻ decay energy	-1,875 ±0.6857 keV
β⁻ decay energy with neutron	-8,182 ±0.6849 keV
Magnetic dipole moment	2.8 ±0.6 μN
Electric quadrupole moment	-1.666 ±0.016 b

Point at nuclide

153SmSamarium-153

Classification	z: 62; n: 91; m: 153
Half life	46.28 ±4 h
Natural abundance	synthetic nuclide
Spin/parity	3/2+
Decay modes	β⁻ decay
Discovery	1938
Mass excess	-72,570 ±1.025 keV
Binding energy	8,228 ±0.0067 keV
Single-particle energy	8,594 ±25.88 keV
Neutron separation energy	5,868 ±0.1342 keV
Q value for electron capture	-1,913 ±9.121 keV
β⁻ decay energy	807.4 ±0.7063 keV
β⁻ decay energy with neutron	-7,743 ±0.6987 keV
Magnetic dipole moment	-0.021 ±0.003 μN
Electric quadrupole moment	1.3 ±0.12 b

Point at nuclide Decay chain of Samarium-153

154SmSamarium-154

Classification	z: 62; n: 92; m: 154
Half life	stable nuclide
Natural abundance	22.74 ±0.14 %
Spin/parity	0+
Discovery	1933
Mass excess	-72,460 ±1.305 keV
Binding energy	8,226 ±0.0085 keV
Single-particle energy	9,096 ±9.093 keV
Neutron separation energy	7,966 ±0.846 keV
Q value for electron capture	-4,189 ±25.05 keV
β⁻ decay energy	-717.2 ±1.101 keV
β⁻ decay energy with neutron	-7,160 ±1.082 keV
Magnetic dipole moment	1.35 ±0.15 μN

Point at nuclide

155SmSamarium-155

Classification	z: 62; n: 93; m: 155
Half life	22.18 ±6 m
Natural abundance	synthetic nuclide
Spin/parity	3/2-
Decay modes	β⁻ decay
Discovery	1951
Mass excess	-70,200 ±1.332 keV
Binding energy	8,211 ±0.0086 keV
Single-particle energy	9,213 ±25.05 keV
Neutron separation energy	5,806 ±0.2683 keV
Q value for electron capture	-3,252 ±4.9 keV
β⁻ decay energy	1,627 ±1.201 keV
β⁻ decay energy with neutron	-6,525 ±1.134 keV
Electric quadrupole moment	1.13 ±0.13 b

Point at nuclide Decay chain of Samarium-155

156SmSamarium-156

Classification	z: 62; n: 94; m: 156
Half life	9.4 ±2 h
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1951
Mass excess	-69,370 ±8.522 keV
Binding energy	8,205 ±0.0546 keV
Single-particle energy	9,709 ±9.74 keV
Neutron separation energy	7,240 ±8.504 keV
Q value for electron capture	-5,194 ±8.604 keV
β⁻ decay energy	722.1 ±7.902 keV
β⁻ decay energy with neutron	-5,614 ±8.469 keV

Point at nuclide Decay chain of Samarium-156

157SmSamarium-157

Classification	z: 62; n: 95; m: 157
Half life	8.03 ±7 m
Natural abundance	synthetic nuclide
Spin/parity	(3/2-)
Decay modes	β⁻ decay
Discovery	1973
Mass excess	-66,680 ±4.434 keV
Binding energy	8,187 ±0.0282 keV
Single-particle energy	9,799 ±4.584 keV
Neutron separation energy	5,388 ±9.606 keV
Q value for electron capture	-4,381 ±8.291 keV
β⁻ decay energy	2,781 ±6.119 keV
β⁻ decay energy with neutron	-4,667 ±5.667 keV

Point at nuclide Decay chain of Samarium-157

158SmSamarium-158

Classification	z: 62; n: 96; m: 158
Half life	5.3 ±3 m
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1970
Mass excess	-65,260 ±4.782 keV
Binding energy	8,177 ±0.0303 keV
Single-particle energy	10,240 ±8.459 keV
Neutron separation energy	6,645 ±6.489 keV
Q value for electron capture	-6,146 ±4.864 keV
β⁻ decay energy	2,018 ±5.114 keV
β⁻ decay energy with neutron	-3,865 ±6.377 keV

Point at nuclide Decay chain of Samarium-158

159SmSamarium-159

Classification	z: 62; n: 97; m: 159
Half life	11.37 ±15 s
Natural abundance	synthetic nuclide
Spin/parity	5/2-
Decay modes	β⁻ decay
Discovery	1986
Mass excess	-62,210 ±5.934 keV
Binding energy	8,157 ±0.0373 keV
Single-particle energy	10,390 ±5.999 keV
Neutron separation energy	5,027 ±7.594 keV
Q value for electron capture	-5,654 ±11.66 keV
β⁻ decay energy	3,835 ±7.321 keV
β⁻ decay energy with neutron	-3,009 ±6.271 keV

Point at nuclide Decay chain of Samarium-159

160SmSamarium-160

Classification	z: 62; n: 98; m: 160
Half life	9.6 ±3 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1986
Mass excess	-60,240 ±1.956 keV
Binding energy	8,144 ±0.0122 keV
Single-particle energy	10,960 ±10.22 keV
Neutron separation energy	6,096 ±6.247 keV
Q value for electron capture	-7,339 ±2.833 keV
β⁻ decay energy	3,260 ±2.154 keV
β⁻ decay energy with neutron	-2,262 ±4.742 keV

Point at nuclide Decay chain of Samarium-160

161SmSamarium-161

Classification	z: 62; n: 99; m: 161
Half life	4.8 ±4 s
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay
Discovery	1998
Mass excess	-56,680 ±6.817 keV
Binding energy	8,122 ±0.0423 keV
Single-particle energy	11,060 ±7.118 keV
Neutron separation energy	4,510 ±7.092 keV
Q value for electron capture	-6,586 ±11.31 keV
β⁻ decay energy	5,119 ±12.41 keV
β⁻ decay energy with neutron	-1,250 ±6.876 keV

Point at nuclide Decay chain of Samarium-161

162SmSamarium-162

Classification	z: 62; n: 100; m: 162
Half life	2.4 ±5 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	2005
Mass excess	-54,380 ±3.523 keV
Binding energy	8,107 ±0.0218 keV
Single-particle energy	11,580 ±9.698 keV
Neutron separation energy	5,778 ±7.673 keV
Q value for electron capture	-8,340 ±300 keV
β⁻ decay energy	4,343 ±3.76 keV
β⁻ decay energy with neutron	-658.8 ±10.98 keV

Point at nuclide Decay chain of Samarium-162

163SmSamarium-163

Classification	z: 62; n: 101; m: 163
Half life	1.23 ± s
Natural abundance	synthetic nuclide
Spin/parity	(1/2-)
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	2012
Mass excess	-50,600 ±7.359 keV
Binding energy	8,084 ±0.0451 keV
Single-particle energy	11,840 ±300 keV
Neutron separation energy	4,291 ±8.158 keV
Q value for electron capture	-7,640 ±400 keV
β⁻ decay energy	5,974 ±7.414 keV
β⁻ decay energy with neutron	52.01 ±7.475 keV

Point at nuclide Decay chain of Samarium-163

164SmSamarium-164

Classification	z: 62; n: 102; m: 164
Half life	1.43 ±24 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	2012
Mass excess	-47,930 ±4.099 keV
Binding energy	8,067 ±0.025 keV
Single-particle energy	12,250 ±400 keV
Neutron separation energy	5,397 ±8.423 keV
Q value for electron capture	-9,566 ±400 keV
β⁻ decay energy	5,306 ±4.59 keV
β⁻ decay energy with neutron	577.1 ±4.197 keV

Point at nuclide Decay chain of Samarium-164

165SmSamarium-165

Classification	z: 62; n: 103; m: 165
Half life	0.98 ±21 s
Natural abundance	synthetic nuclide
Spin/parity	(5/2-)
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	2012
Mass excess	-43,510 ±400 keV
Binding energy	8,041 ±2 keV
Single-particle energy	12,430 ±565 keV
Neutron separation energy	3,656 ±400 keV
Q value for electron capture	-8,840 ±640.3 keV
β⁻ decay energy	7,219 ±400 keV
β⁻ decay energy with neutron	1,651 ±400 keV

Point at nuclide Decay chain of Samarium-165

166SmSamarium-166

Classification	z: 62; n: 104; m: 166
Half life	0.8 ±63 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	2017
Mass excess	-40,450 ±400 keV
Binding energy	8,023 ±2 keV
Single-particle energy	13,060 ±640 keV
Neutron separation energy	5,011 ±565 keV
β⁻ decay energy	6,299 ±412 keV
β⁻ decay energy with neutron	2,208 ±400 keV

Point at nuclide Decay chain of Samarium-166

167SmSamarium-167

Classification	z: 62; n: 105; m: 167
Half life	stable nuclide
Natural abundance	synthetic nuclide
Discovery	2018
Mass excess	-35,330 ±500 keV
Binding energy	7,992 ±3 keV
Neutron separation energy	2,951 ±640 keV
β⁻ decay energy	8,440 ±640 keV
β⁻ decay energy with neutron	3,348 ±510 keV

Point at nuclide

168SmSamarium-168

Classification	z: 62; n: 106; m: 168
Half life	stable nuclide
Natural abundance	synthetic nuclide
Spin/parity	0+
Discovery	2018
Mass excess	-31,640 ±300 keV
Binding energy	7,971 ±2 keV
Neutron separation energy	4,382 ±583 keV
β⁻ decay energy	7,610 ±500 keV
β⁻ decay energy with neutron	4,059 ±500 keV

Point at nuclide

Isotopes of Samarium

129SmSamarium-129ads_clickcall_splitdownload

130SmSamarium-130ads_clickdownload

131SmSamarium-131ads_clickcall_splitdownload

132SmSamarium-132ads_clickcall_splitdownload

133SmSamarium-133ads_clickcall_splitdownload

134SmSamarium-134ads_clickcall_splitdownload

135SmSamarium-135ads_clickcall_splitdownload

136SmSamarium-136ads_clickcall_splitdownload

137SmSamarium-137ads_clickcall_splitdownload

138SmSamarium-138ads_clickcall_splitdownload

139SmSamarium-139ads_clickcall_splitdownload

140SmSamarium-140ads_clickcall_splitdownload

141SmSamarium-141ads_clickcall_splitdownload

142SmSamarium-142ads_clickcall_splitdownload

143SmSamarium-143ads_clickcall_splitdownload

144SmSamarium-144ads_clickdownload

145SmSamarium-145ads_clickcall_splitdownload

146SmSamarium-146ads_clickcall_splitdownload

147SmSamarium-147ads_clickcall_splitdownload

148SmSamarium-148ads_clickcall_splitdownload

149SmSamarium-149ads_clickdownload

150SmSamarium-150ads_clickdownload

151SmSamarium-151ads_clickcall_splitdownload

152SmSamarium-152ads_clickdownload

153SmSamarium-153ads_clickcall_splitdownload

154SmSamarium-154ads_clickdownload

155SmSamarium-155ads_clickcall_splitdownload

156SmSamarium-156ads_clickcall_splitdownload

157SmSamarium-157ads_clickcall_splitdownload

158SmSamarium-158ads_clickcall_splitdownload

159SmSamarium-159ads_clickcall_splitdownload

160SmSamarium-160ads_clickcall_splitdownload

161SmSamarium-161ads_clickcall_splitdownload

162SmSamarium-162ads_clickcall_splitdownload

163SmSamarium-163ads_clickcall_splitdownload

164SmSamarium-164ads_clickcall_splitdownload

165SmSamarium-165ads_clickcall_splitdownload

166SmSamarium-166ads_clickcall_splitdownload

167SmSamarium-167ads_clickdownload

168SmSamarium-168ads_clickdownload

129SmSamarium-129

130SmSamarium-130

131SmSamarium-131

132SmSamarium-132

133SmSamarium-133

134SmSamarium-134

135SmSamarium-135

136SmSamarium-136

137SmSamarium-137

138SmSamarium-138

139SmSamarium-139

140SmSamarium-140

141SmSamarium-141

142SmSamarium-142

143SmSamarium-143

144SmSamarium-144

145SmSamarium-145

146SmSamarium-146

147SmSamarium-147

148SmSamarium-148

149SmSamarium-149

150SmSamarium-150

151SmSamarium-151

152SmSamarium-152

153SmSamarium-153

154SmSamarium-154

155SmSamarium-155

156SmSamarium-156

157SmSamarium-157

158SmSamarium-158

159SmSamarium-159

160SmSamarium-160

161SmSamarium-161

162SmSamarium-162

163SmSamarium-163

164SmSamarium-164

165SmSamarium-165

166SmSamarium-166

167SmSamarium-167

168SmSamarium-168