HomeTable of NuclidesNobeliumIsotopes

Isotopes of Nobelium

List of known isotopes of the element Nobelium.

Isotope	t½	%	Spin/parity	Radius	Isotopic mass	Discovery
²⁴⁸No	2 us	syn.	—	—	2.48·10⁸ ±241 keV/c²	2003
²⁴⁹No	38.1 ±28 ms	syn.	(5/2+)	—	2.49·10⁸ ±300 keV/c²	2003
²⁵⁰No	4.2 ± us	syn.	0+	—	2.5·10⁸ ±215 keV/c²	2003
²⁵¹No	0.8 ±1 s	syn.	(7/2+)	—	2.51·10⁸ ±194 keV/c²	1967
²⁵²No	2.46 ±2 s	syn.	0+	—	2.52·10⁸ ±9.975 keV/c²	1967
²⁵³No	1.62 ±15 m	syn.	(9/2-)	—	2.53·10⁸ ±7.42 keV/c²	1967
²⁵⁴No	51.2 ±4 s	syn.	0+	—	2.54·10⁸ ±10.36 keV/c²	1966
²⁵⁵No	3.52 ±21 m	syn.	(1/2+)	—	2.55·10⁸ ±15.07 keV/c²	1967
²⁵⁶No	2.91 ±5 s	syn.	0+	—	2.56·10⁸ ±8.103 keV/c²	1963
²⁵⁷No	24.5 ±5 s	syn.	(3/2+)	—	2.57·10⁸ ±6.652 keV/c²	1967
²⁵⁸No	1.2 ±2 ms	syn.	0+	—	2.58·10⁸ ±107 keV/c²	1989
²⁵⁹No	58 ±5 m	syn.	(9/2+)	—	2.591·10⁸ ±6.829 keV/c²	1973
²⁶⁰No	106 ±8 ms	syn.	0+	—	2.601·10⁸ ±215 keV/c²	1985
²⁶²No	5 ms	syn.	0+	—	2.621·10⁸ ±387 keV/c²	1988

248NoNobelium-248

Classification	z: 102; n: 146; m: 248
Half life	2 us
Natural abundance	synthetic nuclide
Discovery	2003
Mass excess	80,680 ±224 keV
Binding energy	7,424 ±1 keV
Single-particle energy	2,536 ±305 keV
Q value for electron capture	3,741 ±289.8 keV

Point at nuclide

249NoNobelium-249

Classification	z: 102; n: 147; m: 249
Half life	38.1 ±28 ms
Natural abundance	synthetic nuclide
Spin/parity	(5/2+)
Decay modes	α decay; spontaneous fission; electron capture + proton emission
Discovery	2003
Mass excess	81,780 ±279 keV
Binding energy	7,422 ±1 keV
Single-particle energy	2,450 ±335 keV
Neutron separation energy	6,973 ±358 keV
Q value for electron capture	4,606 ±323.8 keV

Point at nuclide Decay chain of Nobelium-249

250NoNobelium-250

Classification	z: 102; n: 148; m: 250
Half life	4.2 ± us
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	spontaneous fission; α decay
Discovery	2003
Mass excess	81,560 ±200 keV
Binding energy	7,426 ±1 keV
Single-particle energy	2,904 ±259 keV
Neutron separation energy	8,292 ±344 keV
Q value for electron capture	3,166 ±219.6 keV

Point at nuclide Decay chain of Nobelium-250

251NoNobelium-251

Classification	z: 102; n: 149; m: 251
Half life	0.8 ±1 s
Natural abundance	synthetic nuclide
Spin/parity	(7/2+)
Decay modes	α decay; spontaneous fission; electron capture + β⁺ decay
Discovery	1967
Mass excess	82,840 ±181 keV
Binding energy	7,423 ±1 keV
Single-particle energy	2,839 ±202 keV
Neutron separation energy	6,788 ±270 keV
Q value for electron capture	3,882 ±181.9 keV
β⁻ decay energy	-4,981 ±270 keV

Point at nuclide Decay chain of Nobelium-251

252NoNobelium-252

Classification	z: 102; n: 150; m: 252
Half life	2.46 ±2 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	α decay; spontaneous fission; electron capture + β⁺ decay
Discovery	1967
Mass excess	82,870 ±9.292 keV
Binding energy	7,425 ±0.0369 keV
Single-particle energy	3,384 ±21.07 keV
Neutron separation energy	8,049 ±181 keV
Q value for electron capture	2,404 ±91.75 keV
β⁻ decay energy	-5,666 ±185 keV
β⁻ decay energy with neutron	-13,030 ±200 keV

Point at nuclide Decay chain of Nobelium-252

253NoNobelium-253

Classification	z: 102; n: 151; m: 253
Half life	1.62 ±15 m
Natural abundance	synthetic nuclide
Spin/parity	(9/2-)
Decay modes	α decay; electron capture + β⁺ decay
Discovery	1967
Mass excess	84,350 ±6.912 keV
Binding energy	7,422 ±0.0273 keV
Single-particle energy	3,397 ±91.54 keV
Neutron separation energy	6,583 ±11.54 keV
Q value for electron capture	3,185 ±31.76 keV
β⁻ decay energy	-4,165 ±164.6 keV
β⁻ decay energy with neutron	-12,250 ±185 keV
Magnetic dipole moment	-0.53 ±0.08 μN
Electric quadrupole moment	5.9 ±1.7 b

Point at nuclide Decay chain of Nobelium-253

254NoNobelium-254

Classification	z: 102; n: 152; m: 254
Half life	51.2 ±4 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	α decay; electron capture (EC); spontaneous fission
Discovery	1966
Mass excess	84,720 ±9.658 keV
Binding energy	7,423 ±0.038 keV
Single-particle energy	3,738 ±33 keV
Neutron separation energy	7,706 ±11.83 keV
Q value for electron capture	1,270 ±100.4 keV
β⁻ decay energy	-4,923 ±91.82 keV
β⁻ decay energy with neutron	-11,880 ±164.8 keV

Point at nuclide Decay chain of Nobelium-254

255NoNobelium-255

Classification	z: 102; n: 153; m: 255
Half life	3.52 ±21 m
Natural abundance	synthetic nuclide
Spin/parity	(1/2+)
Decay modes	electron capture + β⁺ decay; α decay
Discovery	1967
Mass excess	86,810 ±14.04 keV
Binding energy	7,417 ±0.0551 keV
Single-particle energy	3,930 ±101 keV
Neutron separation energy	5,982 ±17.04 keV
Q value for electron capture	1,969 ±15.11 keV
β⁻ decay energy	-3,136 ±22.59 keV
β⁻ decay energy with neutron	-10,910 ±92.38 keV

Point at nuclide Decay chain of Nobelium-255

256NoNobelium-256

Classification	z: 102; n: 154; m: 256
Half life	2.91 ±5 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	α decay; spontaneous fission
Discovery	1963
Mass excess	87,820 ±7.548 keV
Binding energy	7,416 ±0.0295 keV
Single-particle energy	4,307 ±9.29 keV
Neutron separation energy	7,060 ±15.94 keV
Q value for electron capture	367 ±124.2 keV
β⁻ decay energy	-3,924 ±83.24 keV
β⁻ decay energy with neutron	-10,200 ±19.24 keV

Point at nuclide Decay chain of Nobelium-256

257NoNobelium-257

Classification	z: 102; n: 155; m: 257
Half life	24.5 ±5 s
Natural abundance	synthetic nuclide
Spin/parity	(3/2+)
Decay modes	α decay; electron capture (EC); spontaneous fission
Discovery	1967
Mass excess	90,240 ±6.197 keV
Binding energy	7,409 ±0.0241 keV
Single-particle energy	4,498 ±124 keV
Neutron separation energy	5,647 ±9.654 keV
Q value for electron capture	1,254 ±6.393 keV
β⁻ decay energy	-2,418 ±45 keV
β⁻ decay energy with neutron	-9,571 ±83.13 keV

Point at nuclide Decay chain of Nobelium-257

258NoNobelium-258

Classification	z: 102; n: 156; m: 258
Half life	1.2 ±2 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	spontaneous fission
Discovery	1989
Mass excess	91,470 ±100 keV
Binding energy	7,407 keV
Single-particle energy	4,804 ±100 keV
Neutron separation energy	6,841 ±100 keV
Q value for electron capture	-213.4 ±100 keV
β⁻ decay energy	-3,304 ±143 keV
β⁻ decay energy with neutron	-9,259 ±109 keV

Point at nuclide Decay chain of Nobelium-258

259NoNobelium-259

Classification	z: 102; n: 157; m: 259
Half life	58 ±5 m
Natural abundance	synthetic nuclide
Spin/parity	(9/2+)
Decay modes	α decay; electron capture + β⁺ decay; spontaneous fission
Discovery	1973
Mass excess	94,070 ±6.362 keV
Binding energy	7,399 ±0.0246 keV
Single-particle energy	4,899 ±7.075 keV
Neutron separation energy	5,469 ±100 keV
Q value for electron capture	515.3 ±101.2 keV
β⁻ decay energy	-1,771 ±71 keV
β⁻ decay energy with neutron	-8,774 ±102 keV

Point at nuclide Decay chain of Nobelium-259

260NoNobelium-260

Classification	z: 102; n: 158; m: 260
Half life	106 ±8 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	spontaneous fission
Discovery	1985
Mass excess	95,610 ±200 keV
Binding energy	7,397 ±1 keV
Single-particle energy	5,243 ±224 keV
Neutron separation energy	6,541 ±200 keV
Q value for electron capture	-940 ±373.9 keV
β⁻ decay energy	-2,667 ±236 keV
β⁻ decay energy with neutron	-8,312 ±212 keV

Point at nuclide Decay chain of Nobelium-260

262NoNobelium-262

Classification	z: 102; n: 160; m: 262
Half life	5 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	spontaneous fission
Discovery	1988
Mass excess	100,100 ±361 keV
Binding energy	7,385 ±1 keV
Single-particle energy	5,766 ±624 keV
Neutron separation energy	6,425 ±412 keV
β⁻ decay energy	-2,004 ±412 keV
β⁻ decay energy with neutron	-7,527 ±412 keV

Point at nuclide Decay chain of Nobelium-262