Isotopes of Francium

List of known isotopes of the element Francium.

Isotope	t½	%	Spin/parity	Radius	Isotopic mass	Discovery
¹⁹⁷Fr	0.6 ± ms	syn.	(7/2-)	—	1.97·10⁸ ±60.58 keV/c²	2013
¹⁹⁸Fr	15 ±3 ms	syn.	—	—	1.98·10⁸ ±33.41 keV/c²	2013
¹⁹⁹Fr	12 ± ms	syn.	—	—	1.99·10⁸ ±14.73 keV/c²	1999
²⁰⁰Fr	49 ±4 ms	syn.	(3+)	—	2·10⁸ ±32.76 keV/c²	1995
²⁰¹Fr	63 ±4 ms	syn.	9/2-	—	2.01·10⁸ ±9.747 keV/c²	1980
²⁰²Fr	0.3 ±5 s	syn.	(3+)	—	2.02·10⁸ ±6.476 keV/c²	1980
²⁰³Fr	0.55 ±1 s	syn.	9/2-	—	2.03·10⁸ ±6.689 keV/c²	1967
²⁰⁴Fr	1.8 ±3 s	syn.	(3+)	—	2.04·10⁸ ±26.38 keV/c²	1964
²⁰⁵Fr	3.9 ±7 s	syn.	9/2-	—	2.049·10⁸ ±8.399 keV/c²	1964
²⁰⁶Fr	16 s	syn.	(2+ 3+)	—	2.059·10⁸ ±29.85 keV/c²	1964
²⁰⁷Fr	14.8 ±1 s	syn.	9/2-	5.572 ±0.0176 fm	2.069·10⁸ ±18.84 keV/c²	1964
²⁰⁸Fr	59.1 ±3 s	syn.	7+	5.572 ±0.0176 fm	2.079·10⁸ ±12.51 keV/c²	1964
²⁰⁹Fr	50.5 ±7 s	syn.	9/2-	5.579 ±0.0176 fm	2.089·10⁸ ±12.34 keV/c²	1964
²¹⁰Fr	3.18 ±6 m	syn.	6+	5.581 ±0.0176 fm	2.099·10⁸ ±14.4 keV/c²	1964
²¹¹Fr	3.1 ±2 m	syn.	9/2-	5.588 ±0.0176 fm	2.109·10⁸ ±12.87 keV/c²	1964
²¹²Fr	20 ±6 m	syn.	5+	5.591 ±0.0176 fm	2.119·10⁸ ±9.419 keV/c²	1950
²¹³Fr	34.17 ±6 s	syn.	9/2-	5.597 ±0.0176 fm	2.129·10⁸ ±5.053 keV/c²	1964
²¹⁴Fr	5.5 ±3 ms	syn.	(1-)	—	2.139·10⁸ ±9.145 keV/c²	1967
²¹⁵Fr	86 ±5 ns	syn.	9/2-	—	2.15·10⁸ ±7.585 keV/c²	1970
²¹⁶Fr	0.7 ±2 us	syn.	(1-)	—	2.16·10⁸ ±4.48 keV/c²	1970
²¹⁷Fr	22 ±5 us	syn.	9/2-	—	2.17·10⁸ ±7.011 keV/c²	1968
²¹⁸Fr	1.1 ± ms	syn.	1-	—	2.18·10⁸ ±4.546 keV/c²	1949
²¹⁹Fr	24 ±4 ms	syn.	9/2-	—	2.19·10⁸ ±7.38 keV/c²	1948
²²⁰Fr	27.4 ±3 s	syn.	1+	5.668 ±0.0177 fm	2.2·10⁸ ±4.324 keV/c²	1948
²²¹Fr	4.9 ±2 m	syn.	5/2-	5.679 ±0.0177 fm	2.21·10⁸ ±5.245 keV/c²	1947
²²²Fr	14.2 ±3 m	syn.	2-	5.689 ±0.0177 fm	2.22·10⁸ ±8 keV/c²	1975
²²³Fr	22 ±7 m	syn.	3/2(-)	5.695 ±0.0178 fm	2.23·10⁸ ±2.073 keV/c²	1939
²²⁴Fr	3.33 ±10 m	syn.	1(-)	5.706 ±0.0178 fm	2.24·10⁸ ±12 keV/c²	1969
²²⁵Fr	3.95 ±14 m	syn.	3/2-	5.711 ±0.0178 fm	2.25·10⁸ ±12.84 keV/c²	1969
²²⁶Fr	49 ±1 s	syn.	1-	5.719 ±0.0178 fm	2.26·10⁸ ±6.688 keV/c²	1969
²²⁷Fr	2.47 ±3 m	syn.	1/2+	5.733 ±0.0179 fm	2.27·10⁸ ±6.332 keV/c²	1972
²²⁸Fr	38 ±1 s	syn.	2-	5.739 ±0.0179 fm	2.28·10⁸ ±7.226 keV/c²	1972
²²⁹Fr	50.2 ±20 s	syn.	—	—	2.29·10⁸ ±5.368 keV/c²	1975
²³⁰Fr	19.1 ±5 s	syn.	—	—	2.3·10⁸ ±7.022 keV/c²	1987
²³¹Fr	17.6 ±6 s	syn.	(1/2+)	—	2.31·10⁸ ±8.3 keV/c²	1985
²³²Fr	5.5 ±6 s	syn.	(5)	—	2.32·10⁸ ±15 keV/c²	1990
²³³Fr	0.9 ±1 s	syn.	(1/2+)	—	2.33·10⁸ ±21 keV/c²	2010

197FrFrancium-197

Classification	z: 87; n: 110; m: 197
Half life	0.6 ± ms
Natural abundance	synthetic nuclide
Spin/parity	(7/2-)
Decay modes	α decay
Discovery	2013
Mass excess	10,250 ±56.43 keV
Binding energy	7,673 ±0.2865 keV
Single-particle energy	-989.9 ±58.15 keV
Q value for electron capture	8,743 ±58.7 keV

Point at nuclide Decay chain of Francium-197

198FrFrancium-198

Classification	z: 87; n: 111; m: 198
Half life	15 ±3 ms
Natural abundance	synthetic nuclide
Decay modes	α decay
Discovery	2013
Mass excess	9,577 ±31.13 keV
Binding energy	7,679 ±0.1572 keV
Single-particle energy	-778.4 ±35.08 keV
Neutron separation energy	8,747 ±64.45 keV
Q value for electron capture	10,800 ±33.89 keV

Point at nuclide Decay chain of Francium-198

199FrFrancium-199

Classification	z: 87; n: 112; m: 199
Half life	12 ± ms
Natural abundance	synthetic nuclide
Decay modes	α decay; electron capture + β⁺ decay
Discovery	1999
Mass excess	6,771 ±13.72 keV
Binding energy	7,695 ±0.069 keV
Single-particle energy	-712.8 ±19.19 keV
Neutron separation energy	10,870 ±34.02 keV
Q value for electron capture	8,331 ±15.54 keV

Point at nuclide Decay chain of Francium-199

200FrFrancium-200

Classification	z: 87; n: 113; m: 200
Half life	49 ±4 ms
Natural abundance	synthetic nuclide
Spin/parity	(3+)
Decay modes	α decay
Discovery	1995
Mass excess	6,133 ±30.52 keV
Binding energy	7,700 ±0.1526 keV
Single-particle energy	-404.5 ±31.38 keV
Neutron separation energy	8,709 ±33.46 keV
Q value for electron capture	10,130 ±31.06 keV

Point at nuclide Decay chain of Francium-200

201FrFrancium-201

Classification	z: 87; n: 114; m: 201
Half life	63 ±4 ms
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay
Discovery	1980
Mass excess	3,588 ±9.08 keV
Binding energy	7,714 ±0.0452 keV
Single-particle energy	-300.1 ±10.76 keV
Neutron separation energy	10,610 ±31.84 keV
Q value for electron capture	7,695 ±13.59 keV
β⁻ decay energy	-8,349 ±22.23 keV

Point at nuclide Decay chain of Francium-201

202FrFrancium-202

Classification	z: 87; n: 115; m: 202
Half life	0.3 ±5 s
Natural abundance	synthetic nuclide
Spin/parity	(3+)
Decay modes	α decay
Discovery	1980
Mass excess	3,101 ±6.033 keV
Binding energy	7,719 ±0.0299 keV
Single-particle energy	80.02 ±11.78 keV
Neutron separation energy	8,558 ±10.9 keV
Q value for electron capture	9,376 ±18.53 keV
β⁻ decay energy	-5,974 ±16.18 keV
β⁻ decay energy with neutron	-16,910 ±21.17 keV
Magnetic dipole moment	3.9 ±0.05 μN

Point at nuclide Decay chain of Francium-202

203FrFrancium-203

Classification	z: 87; n: 116; m: 203
Half life	0.55 ±1 s
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay
Discovery	1967
Mass excess	876.4 ±6.232 keV
Binding energy	7,731 ±0.0307 keV
Single-particle energy	137.9 ±18.59 keV
Neutron separation energy	10,290 ±8.673 keV
Q value for electron capture	7,060 ±8.524 keV
β⁻ decay energy	-7,725 ±11.51 keV
β⁻ decay energy with neutron	-16,270 ±16.25 keV
Magnetic dipole moment	3.74 ±0.04 μN
Electric quadrupole moment	-0.47 ±0.02 b

Point at nuclide Decay chain of Francium-203

204FrFrancium-204

Classification	z: 87; n: 117; m: 204
Half life	1.8 ±3 s
Natural abundance	synthetic nuclide
Spin/parity	(3+)
Decay modes	α decay; electron capture + β⁺ decay
Discovery	1964
Mass excess	607.3 ±24.58 keV
Binding energy	7,734 ±0.1205 keV
Single-particle energy	497.6 ±25.25 keV
Neutron separation energy	8,340 ±25.35 keV
Q value for electron capture	8,577 ±25.68 keV
β⁻ decay energy	-5,454 ±26.15 keV
β⁻ decay energy with neutron	-16,070 ±26.42 keV
Magnetic dipole moment	3.99 ±0.03 μN
Electric quadrupole moment	-0.141 ±0.009 b

Point at nuclide Decay chain of Francium-204

205FrFrancium-205

Classification	z: 87; n: 118; m: 205
Half life	3.9 ±7 s
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay; electron capture + β⁺ decay
Discovery	1964
Mass excess	-1,310 ±7.824 keV
Binding energy	7,745 ±0.0382 keV
Single-particle energy	628.6 ±10.79 keV
Neutron separation energy	9,988 ±25.79 keV
Q value for electron capture	6,399 ±9.329 keV
β⁻ decay energy	-7,114 ±24.07 keV
β⁻ decay energy with neutron	-15,450 ±11.86 keV
Magnetic dipole moment	3.8 ±0.03 μN
Electric quadrupole moment	-0.305 ±0.018 b

Point at nuclide Decay chain of Francium-205

206FrFrancium-206

Classification	z: 87; n: 119; m: 206
Half life	16 s
Natural abundance	synthetic nuclide
Spin/parity	(2+ 3+)
Decay modes	α decay; electron capture (EC)
Discovery	1964
Mass excess	-1,247 ±27.81 keV
Binding energy	7,746 ±0.135 keV
Single-particle energy	826 ±28.27 keV
Neutron separation energy	8,008 ±28.89 keV
Q value for electron capture	7,886 ±29.1 keV
β⁻ decay energy	-4,813 ±33.13 keV
β⁻ decay energy with neutron	-15,130 ±35.94 keV
Magnetic dipole moment	3.97 ±0.05 μN
Electric quadrupole moment	-0.354 ±0.009 b

Point at nuclide Decay chain of Francium-206

207FrFrancium-207

Classification	z: 87; n: 120; m: 207
Half life	14.8 ±1 s
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay; electron capture + β⁺ decay
Discovery	1964
Mass excess	-2,850 ±17.55 keV
Binding energy	7,756 ±0.0848 keV
Single-particle energy	1,005 ±19.54 keV
Neutron separation energy	9,673 ±32.88 keV
Q value for electron capture	5,785 ±18.18 keV
β⁻ decay energy	-6,364 ±60.87 keV
β⁻ decay energy with neutron	-14,490 ±25.14 keV
Magnetic dipole moment	3.87 ±0.04 μN
Electric quadrupole moment	-0.24 ±0.02 b

Point at nuclide Decay chain of Francium-207

208FrFrancium-208

Classification	z: 87; n: 121; m: 208
Half life	59.1 ±3 s
Natural abundance	synthetic nuclide
Spin/parity	7+
Decay modes	α decay; electron capture + β⁺ decay
Discovery	1964
Mass excess	-2,665 ±11.65 keV
Binding energy	7,756 ±0.056 keV
Single-particle energy	1,319 ±12.58 keV
Neutron separation energy	7,887 ±21.07 keV
Q value for electron capture	6,990 ±15.46 keV
β⁻ decay energy	-4,393 ±14.74 keV
β⁻ decay energy with neutron	-14,260 ±59.44 keV
Magnetic dipole moment	4.71 ±0.04 μN
Electric quadrupole moment	0.052 ±0.011 b

Point at nuclide Decay chain of Francium-208

209FrFrancium-209

Classification	z: 87; n: 122; m: 209
Half life	50.5 ±7 s
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay; electron capture + β⁺ decay
Discovery	1964
Mass excess	-3,783 ±11.5 keV
Binding energy	7,763 ±0.055 keV
Single-particle energy	1,415 ±15.34 keV
Neutron separation energy	9,188 ±16.37 keV
Q value for electron capture	5,158 ±15.21 keV
β⁻ decay energy	-5,641 ±12.85 keV
β⁻ decay energy with neutron	-13,590 ±14.6 keV
Magnetic dipole moment	3.93 ±0.05 μN
Electric quadrupole moment	-0.26 ±0.02 b

Point at nuclide Decay chain of Francium-209

210FrFrancium-210

Classification	z: 87; n: 123; m: 210
Half life	3.18 ±6 m
Natural abundance	synthetic nuclide
Spin/parity	6+
Decay modes	α decay; electron capture + β⁺ decay
Discovery	1964
Mass excess	-3,344 ±13.42 keV
Binding energy	7,763 ±0.0639 keV
Single-particle energy	1,691 ±16.71 keV
Neutron separation energy	7,632 ±17.63 keV
Q value for electron capture	6,261 ±14.17 keV
β⁻ decay energy	-3,787 ±16.26 keV
β⁻ decay energy with neutron	-13,280 ±14.59 keV
Magnetic dipole moment	4.38 ±0.05 μN
Electric quadrupole moment	0.21 ±0.02 b

Point at nuclide Decay chain of Francium-210

211FrFrancium-211

Classification	z: 87; n: 124; m: 211
Half life	3.1 ±2 m
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay; electron capture (EC)
Discovery	1964
Mass excess	-4,141 ±11.99 keV
Binding energy	7,768 ±0.0568 keV
Single-particle energy	1,824 ±12.82 keV
Neutron separation energy	8,868 ±17.97 keV
Q value for electron capture	4,615 ±13.79 keV
β⁻ decay energy	-4,973 ±12.97 keV
β⁻ decay energy with neutron	-12,660 ±15.1 keV
Magnetic dipole moment	3.97 ±0.05 μN
Electric quadrupole moment	-0.21 ±0.02 b

Point at nuclide Decay chain of Francium-211

212FrFrancium-212

Classification	z: 87; n: 125; m: 212
Half life	20 ±6 m
Natural abundance	synthetic nuclide
Spin/parity	5+
Decay modes	electron capture + β⁺ decay; α decay
Discovery	1950
Mass excess	-3,516 ±8.775 keV
Binding energy	7,766 ±0.0414 keV
Single-particle energy	2,049 ±11.1 keV
Neutron separation energy	7,447 ±14.85 keV
Q value for electron capture	5,143 ±9.31 keV
β⁻ decay energy	-3,318 ±13.49 keV
β⁻ decay energy with neutron	-12,420 ±10.08 keV
Magnetic dipole moment	4.59 ±0.05 μN
Electric quadrupole moment	-0.1 ±0.002 b

Point at nuclide Decay chain of Francium-212

213FrFrancium-213

Classification	z: 87; n: 126; m: 213
Half life	34.17 ±6 s
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay; electron capture + β⁺ decay
Discovery	1964
Mass excess	-3,555 ±4.707 keV
Binding energy	7,768 ±0.0221 keV
Single-particle energy	2,183 ±5.554 keV
Neutron separation energy	8,109 ±9.956 keV
Q value for electron capture	2,141 ±5.78 keV
β⁻ decay energy	-3,900 ±10.88 keV
β⁻ decay energy with neutron	-11,430 ±11.24 keV
Magnetic dipole moment	3.99 ±0.01 μN
Electric quadrupole moment	-0.138 ±0.003 b

Point at nuclide Decay chain of Francium-213

214FrFrancium-214

Classification	z: 87; n: 127; m: 214
Half life	5.5 ±3 ms
Natural abundance	synthetic nuclide
Spin/parity	(1-)
Decay modes	α decay
Discovery	1967
Mass excess	-958.4 ±8.519 keV
Binding energy	7,757 ±0.0398 keV
Single-particle energy	2,551 ±9.017 keV
Neutron separation energy	5,475 ±9.679 keV
Q value for electron capture	3,361 ±12.52 keV
β⁻ decay energy	-1,052 ±9.987 keV
β⁻ decay energy with neutron	-9,376 ±12.99 keV

Point at nuclide Decay chain of Francium-214

215FrFrancium-215

Classification	z: 87; n: 128; m: 215
Half life	86 ±5 ns
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay
Discovery	1970
Mass excess	318.1 ±7.066 keV
Binding energy	7,753 ±0.0329 keV
Single-particle energy	2,651 ±11.47 keV
Neutron separation energy	6,794 ±10.95 keV
Q value for electron capture	1,487 ±9.328 keV
β⁻ decay energy	-2,214 ±9.769 keV
β⁻ decay energy with neutron	-7,846 ±8.781 keV

Point at nuclide Decay chain of Francium-215

216FrFrancium-216

Classification	z: 87; n: 129; m: 216
Half life	0.7 ±2 us
Natural abundance	synthetic nuclide
Spin/parity	(1-)
Decay modes	α decay; electron capture (EC)
Discovery	1970
Mass excess	2,971 ±4.174 keV
Binding energy	7,742 ±0.0193 keV
Single-particle energy	3,148 ±7.206 keV
Neutron separation energy	5,418 ±7.977 keV
Q value for electron capture	2,717 ±7.12 keV
β⁻ decay energy	-320.5 ±8.89 keV
β⁻ decay energy with neutron	-7,633 ±8.137 keV

Point at nuclide Decay chain of Francium-216

217FrFrancium-217

Classification	z: 87; n: 130; m: 217
Half life	22 ±5 us
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay
Discovery	1968
Mass excess	4,314 ±6.531 keV
Binding energy	7,737 ±0.0301 keV
Single-particle energy	3,227 ±8.564 keV
Neutron separation energy	6,727 ±7.506 keV
Q value for electron capture	656 ±7.764 keV
β⁻ decay energy	-1,575 ±9.472 keV
β⁻ decay energy with neutron	-7,049 ±10.21 keV

Point at nuclide Decay chain of Francium-217

218FrFrancium-218

Classification	z: 87; n: 131; m: 218
Half life	1.1 ± ms
Natural abundance	synthetic nuclide
Spin/parity	1-
Decay modes	α decay
Discovery	1949
Mass excess	7,059 ±4.235 keV
Binding energy	7,726 ±0.0194 keV
Single-particle energy	3,888 ±5.667 keV
Neutron separation energy	5,326 ±7.541 keV
Q value for electron capture	1,842 ±4.827 keV
β⁻ decay energy	413.8 ±10.56 keV
β⁻ decay energy with neutron	-6,902 ±8.062 keV

Point at nuclide Decay chain of Francium-218

219FrFrancium-219

Classification	z: 87; n: 132; m: 219
Half life	24 ±4 ms
Natural abundance	synthetic nuclide
Spin/parity	9/2-
Decay modes	α decay
Discovery	1948
Mass excess	8,616 ±6.874 keV
Binding energy	7,721 ±0.0314 keV
Single-particle energy	3,889 ±7.135 keV
Neutron separation energy	6,513 ±7.966 keV
Q value for electron capture	-212.4 ±7.188 keV
β⁻ decay energy	-777 ±9.59 keV
β⁻ decay energy with neutron	-6,100 ±11.9 keV
Electric quadrupole moment	-1.19 ±0.02 b

Point at nuclide Decay chain of Francium-219

220FrFrancium-220

Classification	z: 87; n: 133; m: 220
Half life	27.4 ±3 s
Natural abundance	synthetic nuclide
Spin/parity	1+
Decay modes	α decay; β⁻ decay
Discovery	1948
Mass excess	11,480 ±4.028 keV
Binding energy	7,709 ±0.0183 keV
Single-particle energy	4,635 ±4.391 keV
Neutron separation energy	5,205 ±7.86 keV
Q value for electron capture	870.3 ±4.418 keV
β⁻ decay energy	1,210 ±8.48 keV
β⁻ decay energy with neutron	-5,983 ±7.79 keV
Magnetic dipole moment	-0.66 ±0.01 μN
Electric quadrupole moment	0.487 ±0.008 b

Point at nuclide Decay chain of Francium-220

221FrFrancium-221

Classification	z: 87; n: 134; m: 221
Half life	4.9 ±2 m
Natural abundance	synthetic nuclide
Spin/parity	5/2-
Decay modes	α decay; β⁻ decay
Discovery	1947
Mass excess	13,270 ±4.886 keV
Binding energy	7,703 ±0.0221 keV
Single-particle energy	4,623 ±4.996 keV
Neutron separation energy	6,276 ±6.218 keV
Q value for electron capture	-1,195 ±7.518 keV
β⁻ decay energy	313.3 ±6.385 keV
β⁻ decay energy with neutron	-5,067 ±8.98 keV
Magnetic dipole moment	1.57 ±0.02 μN
Electric quadrupole moment	-1.02 ±0.03 b

Point at nuclide Decay chain of Francium-221

222FrFrancium-222

Classification	z: 87; n: 135; m: 222
Half life	14.2 ±3 m
Natural abundance	synthetic nuclide
Spin/parity	2-
Decay modes	β⁻ decay
Discovery	1975
Mass excess	16,370 ±7.452 keV
Binding energy	7,690 ±0.0336 keV
Single-particle energy	5,382 ±9.39 keV
Neutron separation energy	4,970 ±8.911 keV
Q value for electron capture	6.146 ±7.701 keV
β⁻ decay energy	2,057 ±8.681 keV
β⁻ decay energy with neutron	-4,658 ±8.773 keV
Magnetic dipole moment	0.63 ±0.01 μN
Electric quadrupole moment	0.51 ±0.04 b

Point at nuclide Decay chain of Francium-222

223FrFrancium-223

Classification	z: 87; n: 136; m: 223
Half life	22 ±7 m
Natural abundance	synthetic nuclide
Spin/parity	3/2(-)
Decay modes	β⁻ decay; α decay
Discovery	1939
Mass excess	18,380 ±1.931 keV
Binding energy	7,683 ±0.0087 keV
Single-particle energy	5,278 ±2.264 keV
Neutron separation energy	6,067 ±7.698 keV
Q value for electron capture	-2,008 ±8.057 keV
β⁻ decay energy	1,149 ±0.8476 keV
β⁻ decay energy with neutron	-4,010 ±4.725 keV
Magnetic dipole moment	1.16 ±0.01 μN
Electric quadrupole moment	1.18 ±0.02 b

Point at nuclide Decay chain of Francium-223

224FrFrancium-224

Classification	z: 87; n: 137; m: 224
Half life	3.33 ±10 m
Natural abundance	synthetic nuclide
Spin/parity	1(-)
Decay modes	β⁻ decay
Discovery	1969
Mass excess	21,740 ±11.17 keV
Binding energy	7,670 ±0.0499 keV
Single-particle energy	5,930 ±13.64 keV
Neutron separation energy	4,705 ±11.34 keV
Q value for electron capture	-696.5 ±14.87 keV
β⁻ decay energy	2,922 ±11.32 keV
β⁻ decay energy with neutron	-3,556 ±11.37 keV
Magnetic dipole moment	0.4 ±0.01 μN
Electric quadrupole moment	0.523 ±0.009 b

Point at nuclide Decay chain of Francium-224

225FrFrancium-225

Classification	z: 87; n: 138; m: 225
Half life	3.95 ±14 m
Natural abundance	synthetic nuclide
Spin/parity	3/2-
Decay modes	β⁻ decay
Discovery	1969
Mass excess	23,820 ±11.96 keV
Binding energy	7,662 ±0.0532 keV
Single-particle energy	5,913 ±15.47 keV
Neutron separation energy	5,999 ±16.37 keV
Q value for electron capture	-2,714 ±16.35 keV
β⁻ decay energy	1,827 ±12.15 keV
β⁻ decay energy with neutron	-3,077 ±12.08 keV
Magnetic dipole moment	1.06 ±0.01 μN
Electric quadrupole moment	1.33 ±0.02 b

Point at nuclide Decay chain of Francium-225

226FrFrancium-226

Classification	z: 87; n: 139; m: 226
Half life	49 ±1 s
Natural abundance	synthetic nuclide
Spin/parity	1-
Decay modes	β⁻ decay
Discovery	1969
Mass excess	27,520 ±6.23 keV
Binding energy	7,648 ±0.0276 keV
Single-particle energy	6,302 ±12.76 keV
Neutron separation energy	4,371 ±13.49 keV
Q value for electron capture	-1,227 ±12.18 keV
β⁻ decay energy	3,852 ±6.521 keV
β⁻ decay energy with neutron	-2,544 ±6.749 keV
Magnetic dipole moment	0.0712 ±0.0014 μN
Electric quadrupole moment	-1.37 ±0.03 b

Point at nuclide Decay chain of Francium-226

227FrFrancium-227

Classification	z: 87; n: 140; m: 227
Half life	2.47 ±3 m
Natural abundance	synthetic nuclide
Spin/parity	1/2+
Decay modes	β⁻ decay
Discovery	1972
Mass excess	29,680 ±5.898 keV
Binding energy	7,640 ±0.026 keV
Single-particle energy	6,353 ±12.02 keV
Neutron separation energy	5,909 ±8.579 keV
Q value for electron capture	-3,204 ±15.27 keV
β⁻ decay energy	2,504 ±6.211 keV
β⁻ decay energy with neutron	-2,057 ±6.205 keV
Magnetic dipole moment	1.49 ±0.02 μN

Point at nuclide Decay chain of Francium-227

228FrFrancium-228

Classification	z: 87; n: 141; m: 228
Half life	38 ±1 s
Natural abundance	synthetic nuclide
Spin/parity	2-
Decay modes	β⁻ decay
Discovery	1972
Mass excess	33,380 ±6.732 keV
Binding energy	7,626 ±0.0295 keV
Single-particle energy	6,790 ±15.61 keV
Neutron separation energy	4,369 ±8.95 keV
Q value for electron capture	-1,860 ±18.91 keV
β⁻ decay energy	4,444 ±7.021 keV
β⁻ decay energy with neutron	-1,865 ±7.007 keV
Magnetic dipole moment	-0.76 ±0.01 μN
Electric quadrupole moment	2.41 ±0.06 b

Point at nuclide Decay chain of Francium-228

229FrFrancium-229

Classification	z: 87; n: 142; m: 229
Half life	50.2 ±20 s
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay
Discovery	1975
Mass excess	35,660 ±5.001 keV
Binding energy	7,618 ±0.0218 keV
Single-particle energy	6,864 ±18.37 keV
Neutron separation energy	5,787 ±8.386 keV
Q value for electron capture	-3,695 ±13.96 keV
β⁻ decay energy	3,106 ±16.23 keV
β⁻ decay energy with neutron	-1,344 ±5.352 keV

Point at nuclide Decay chain of Francium-229

230FrFrancium-230

Classification	z: 87; n: 143; m: 230
Half life	19.1 ±5 s
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay
Discovery	1987
Mass excess	39,480 ±6.541 keV
Binding energy	7,603 ±0.0284 keV
Single-particle energy	7,164 ±14.58 keV
Neutron separation energy	4,252 ±8.234 keV
Q value for electron capture	-2,684 ±200.1 keV
β⁻ decay energy	4,970 ±12.19 keV
β⁻ decay energy with neutron	-1,147 ±16.76 keV

Point at nuclide Decay chain of Francium-230

231FrFrancium-231

Classification	z: 87; n: 144; m: 231
Half life	17.6 ±6 s
Natural abundance	synthetic nuclide
Spin/parity	(1/2+)
Decay modes	β⁻ decay
Discovery	1985
Mass excess	42,080 ±7.731 keV
Binding energy	7,594 ±0.0335 keV
Single-particle energy	7,378 ±200 keV
Neutron separation energy	5,477 ±10.12 keV
Q value for electron capture	-4,470 ±300.1 keV
β⁻ decay energy	3,864 ±13.74 keV
β⁻ decay energy with neutron	-507.1 ±12.87 keV

Point at nuclide Decay chain of Francium-231

232FrFrancium-232

Classification	z: 87; n: 145; m: 232
Half life	5.5 ±6 s
Natural abundance	synthetic nuclide
Spin/parity	(5)
Decay modes	β⁻ decay
Discovery	1990
Mass excess	46,070 ±13.97 keV
Binding energy	7,579 ±0.0602 keV
Single-particle energy	7,766 ±300 keV
Neutron separation energy	4,079 ±15.96 keV
β⁻ decay energy	5,575 ±16.7 keV
β⁻ decay energy with neutron	-215 ±18.01 keV

Point at nuclide Decay chain of Francium-232

233FrFrancium-233

Classification	z: 87; n: 146; m: 233
Half life	0.9 ±1 s
Natural abundance	synthetic nuclide
Spin/parity	(1/2+)
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	2010
Mass excess	48,920 ±19.56 keV
Binding energy	7,569 ±0.084 keV
Neutron separation energy	5,224 ±24.03 keV
β⁻ decay energy	4,585 ±21.36 keV
β⁻ decay energy with neutron	351.7 ±21.59 keV

Point at nuclide Decay chain of Francium-233

Isotopes of Francium

197FrFrancium-197ads_clickcall_splitdownload

198FrFrancium-198ads_clickcall_splitdownload

199FrFrancium-199ads_clickcall_splitdownload

200FrFrancium-200ads_clickcall_splitdownload

201FrFrancium-201ads_clickcall_splitdownload

202FrFrancium-202ads_clickcall_splitdownload

203FrFrancium-203ads_clickcall_splitdownload

204FrFrancium-204ads_clickcall_splitdownload

205FrFrancium-205ads_clickcall_splitdownload

206FrFrancium-206ads_clickcall_splitdownload

207FrFrancium-207ads_clickcall_splitdownload

208FrFrancium-208ads_clickcall_splitdownload

209FrFrancium-209ads_clickcall_splitdownload

210FrFrancium-210ads_clickcall_splitdownload

211FrFrancium-211ads_clickcall_splitdownload

212FrFrancium-212ads_clickcall_splitdownload

213FrFrancium-213ads_clickcall_splitdownload

214FrFrancium-214ads_clickcall_splitdownload

215FrFrancium-215ads_clickcall_splitdownload

216FrFrancium-216ads_clickcall_splitdownload

217FrFrancium-217ads_clickcall_splitdownload

218FrFrancium-218ads_clickcall_splitdownload

219FrFrancium-219ads_clickcall_splitdownload

220FrFrancium-220ads_clickcall_splitdownload

221FrFrancium-221ads_clickcall_splitdownload

222FrFrancium-222ads_clickcall_splitdownload

223FrFrancium-223ads_clickcall_splitdownload

224FrFrancium-224ads_clickcall_splitdownload

225FrFrancium-225ads_clickcall_splitdownload

226FrFrancium-226ads_clickcall_splitdownload

227FrFrancium-227ads_clickcall_splitdownload

228FrFrancium-228ads_clickcall_splitdownload

229FrFrancium-229ads_clickcall_splitdownload

230FrFrancium-230ads_clickcall_splitdownload

231FrFrancium-231ads_clickcall_splitdownload

232FrFrancium-232ads_clickcall_splitdownload

233FrFrancium-233ads_clickcall_splitdownload

197FrFrancium-197

198FrFrancium-198

199FrFrancium-199

200FrFrancium-200

201FrFrancium-201

202FrFrancium-202

203FrFrancium-203

204FrFrancium-204

205FrFrancium-205

206FrFrancium-206

207FrFrancium-207

208FrFrancium-208

209FrFrancium-209

210FrFrancium-210

211FrFrancium-211

212FrFrancium-212

213FrFrancium-213

214FrFrancium-214

215FrFrancium-215

216FrFrancium-216

217FrFrancium-217

218FrFrancium-218

219FrFrancium-219

220FrFrancium-220

221FrFrancium-221

222FrFrancium-222

223FrFrancium-223

224FrFrancium-224

225FrFrancium-225

226FrFrancium-226

227FrFrancium-227

228FrFrancium-228

229FrFrancium-229

230FrFrancium-230

231FrFrancium-231

232FrFrancium-232

233FrFrancium-233