Isotopes of Silicon

List of known isotopes of the element Silicon.

Isotope	t½	%	Spin/parity	Radius	Isotopic mass	Discovery
²²Si	29 ±2 ms	syn.	0+	—	2.203·10⁷ ±537 keV/c²	1987
²³Si	42.3 ±4 ms	syn.	(5/2)+	—	2.302·10⁷ ±537 keV/c²	1986
²⁴Si	141.3 ±15 ms	syn.	0+	—	2.401·10⁷ ±20.9 keV/c²	1979
²⁵Si	220 ±3 ms	syn.	5/2+	—	2.5·10⁷ ±10.73 keV/c²	1963
²⁶Si	2.245 ±7 s	syn.	0+	—	2.599·10⁷ ±0.115 keV/c²	1960
²⁷Si	4.15 ±4 s	syn.	5/2+	—	2.698·10⁷ ±0.115 keV/c²	1939
²⁸Si	stab.	92.25 ±0.0037 %	0+	3.122 ±0.0024 fm	2.797·10⁷ ±5.5·10^-4 keV/c²	1920
²⁹Si	stab.	4.672 ±0.016 %	1/2+	3.117 ±0.0052 fm	2.897·10⁷ ±6·10^-4 keV/c²	1920
³⁰Si	stab.	3.073 ±0.0021 %	0+	3.133 ±0.004 fm	2.997·10⁷ ±0.023 keV/c²	1924
³¹Si	157.2 ±20 m	syn.	3/2+	—	3.097·10⁷ ±0.046 keV/c²	1934
³²Si	157 ±7 a	syn.	0+	—	3.197·10⁷ ±0.32 keV/c²	1953
³³Si	6.11 ±21 s	syn.	3/2+	—	3.297·10⁷ ±0.75 keV/c²	1971
³⁴Si	2.77 ±20 s	syn.	0+	—	3.397·10⁷ ±0.86 keV/c²	1971
³⁵Si	0.78 ±12 s	syn.	(7/2)-	—	3.498·10⁷ ±38.49 keV/c²	1971
³⁶Si	0.45 ±6 s	syn.	0+	—	3.598·10⁷ ±77.07 keV/c²	1971
³⁷Si	90 ±60 ms	syn.	(5/2-)	—	3.699·10⁷ ±122.1 keV/c²	1979
³⁸Si	63 ±8 ms	syn.	0+	—	3.799·10⁷ ±112.5 keV/c²	1979
³⁹Si	47.5 ±20 ms	syn.	(5/2-)	—	3.9·10⁷ ±145.5 keV/c²	1979
⁴⁰Si	33 ±10 ms	syn.	0+	—	4·10⁷ ±130.9 keV/c²	1989
⁴¹Si	20 ±25 ms	syn.	—	—	4.101·10⁷ ±322 keV/c²	1989
⁴²Si	12.5 ±35 ms	syn.	0+	—	4.201·10⁷ ±322 keV/c²	1990
⁴³Si	60 ns	syn.	—	—	4.302·10⁷ ±429 keV/c²	2002
⁴⁴Si	360 ns	syn.	0+	—	4.403·10⁷ ±537 keV/c²	2007

22SiSilicon-22

Classification	z: 14; n: 8; m: 22
Half life	29 ±2 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay; β⁺ decay + proton emission
Discovery	1987
Mass excess	33,640 ±500 keV
Binding energy	6,044 ±23 keV
Single-particle energy	739 ±781 keV
Q value for electron capture	15,430 ±640.9 keV

Point at nuclide Decay chain of Silicon-22

23SiSilicon-23

Classification	z: 14; n: 9; m: 23
Half life	42.3 ±4 ms
Natural abundance	synthetic nuclide
Spin/parity	(5/2)+
Decay modes	electron capture + β⁺ decay; electron capture + proton emission; electron capture with two-proton emission
Discovery	1986
Mass excess	23,950 ±500 keV
Binding energy	6,554 ±22 keV
Single-particle energy	1,541 ±641 keV
Neutron separation energy	17,760 ±707 keV
Q value for electron capture	17,200 ±500 keV

Point at nuclide Decay chain of Silicon-23

24SiSilicon-24

Classification	z: 14; n: 10; m: 24
Half life	141.3 ±15 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay; electron capture + proton emission
Discovery	1979
Mass excess	10,740 ±19.47 keV
Binding energy	7,167 ±0.8113 keV
Single-particle energy	3,291 ±19.47 keV
Neutron separation energy	21,270 ±501 keV
Q value for electron capture	10,790 ±19.47 keV
β⁻ decay energy	-23,280 ±501 keV

Point at nuclide Decay chain of Silicon-24

25SiSilicon-25

Classification	z: 14; n: 11; m: 25
Half life	220 ±3 ms
Natural abundance	synthetic nuclide
Spin/parity	5/2+
Decay modes	electron capture + β⁺ decay; β⁺ decay + proton emission
Discovery	1963
Mass excess	3,827 ±10 keV
Binding energy	7,480 ±0.4 keV
Single-particle energy	3,412 ±10 keV
Neutron separation energy	14,980 ±21.88 keV
Q value for electron capture	12,740 ±10 keV
β⁻ decay energy	-16,370 ±400 keV
β⁻ decay energy with neutron	-38,270 ±500 keV

Point at nuclide Decay chain of Silicon-25

26SiSilicon-26

Classification	z: 14; n: 12; m: 26
Half life	2.245 ±7 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	electron capture + β⁺ decay
Discovery	1960
Mass excess	-7,142 ±0.108 keV
Binding energy	7,924 ±0.0041 keV
Single-particle energy	5,514 ±0.1111 keV
Neutron separation energy	19,030 ±10 keV
Q value for electron capture	5,069 ±0.127 keV
β⁻ decay energy	-18,120 ±196 keV
β⁻ decay energy with neutron	-35,410 ±400 keV

Point at nuclide Decay chain of Silicon-26

27SiSilicon-27

Classification	z: 14; n: 13; m: 27
Half life	4.15 ±4 s
Natural abundance	synthetic nuclide
Spin/parity	5/2+
Decay modes	electron capture + β⁺ decay
Discovery	1939
Mass excess	-12,390 ±0.107 keV
Binding energy	8,124 ±0.004 keV
Single-particle energy	7,463 ±0.1262 keV
Neutron separation energy	13,310 ±0.152 keV
Q value for electron capture	4,812 ±0.117 keV
β⁻ decay energy	-11,730 ±9.001 keV
β⁻ decay energy with neutron	-31,430 ±196 keV
Magnetic dipole moment	-0.8652 ±3·10^-4 μN
Electric quadrupole moment	0.063 ±0.014 b

Point at nuclide Decay chain of Silicon-27

28SiSilicon-28

Classification	z: 14; n: 14; m: 28
Half life	stable nuclide
Natural abundance	92.25 ±0.0037 %
Spin/parity	0+
Discovery	1920
Mass excess	-21,500 ±5.1·10^-4 keV
Binding energy	8,447 ±2·10^-4 keV
Single-particle energy	11,580 ±0.0474 keV
Neutron separation energy	17,170 ±0.1074 keV
Q value for electron capture	-4,643 ±0.049 keV
β⁻ decay energy	-14,350 ±1.147 keV
β⁻ decay energy with neutron	-28,910 ±9 keV

Point at nuclide

29SiSilicon-29

Classification	z: 14; n: 15; m: 29
Half life	stable nuclide
Natural abundance	4.672 ±0.016 %
Spin/parity	1/2+
Discovery	1920
Mass excess	-21,900 ±5.6·10^-4 keV
Binding energy	8,448 ±2·10^-4 keV
Single-particle energy	12,330 ±0.0486 keV
Neutron separation energy	8,473 ±5·10^-4 keV
Q value for electron capture	-3,688 ±0.34 keV
β⁻ decay energy	-4,943 ±0.3589 keV
β⁻ decay energy with neutron	-22,820 ±1.147 keV
Magnetic dipole moment	-0.5551 ±3·10^-6 μN

Point at nuclide

30SiSilicon-30

Classification	z: 14; n: 16; m: 30
Half life	stable nuclide
Natural abundance	3.073 ±0.0021 %
Spin/parity	0+
Discovery	1924
Mass excess	-24,440 ±0.022 keV
Binding energy	8,520 ±8·10^-4 keV
Single-particle energy	13,510 ±0.3453 keV
Neutron separation energy	10,600 ±0.0216 keV
Q value for electron capture	-8,569 ±1.936 keV
β⁻ decay energy	-4,233 ±0.0615 keV
β⁻ decay energy with neutron	-15,560 ±0.3595 keV
Magnetic dipole moment	0.9 ±0.2 μN
Electric quadrupole moment	-0.05 ±0.06 b

Point at nuclide

31SiSilicon-31

Classification	z: 14; n: 17; m: 31
Half life	157.2 ±20 m
Natural abundance	synthetic nuclide
Spin/parity	3/2+
Decay modes	β⁻ decay
Discovery	1934
Mass excess	-22,950 ±0.043 keV
Binding energy	8,458 ±0.0014 keV
Single-particle energy	14,370 ±1.936 keV
Neutron separation energy	6,587 ±0.0376 keV
Q value for electron capture	-7,999 ±2.236 keV
β⁻ decay energy	1,491 ±0.0434 keV
β⁻ decay energy with neutron	-10,820 ±0.0721 keV

Point at nuclide Decay chain of Silicon-31

32SiSilicon-32

Classification	z: 14; n: 18; m: 32
Half life	157 ±7 a
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1953
Mass excess	-24,080 ±0.298 keV
Binding energy	8,481 ±0.0093 keV
Single-particle energy	16,410 ±2.255 keV
Neutron separation energy	9,199 ±0.3012 keV
Q value for electron capture	-12,980 ±7.179 keV
β⁻ decay energy	227.1 ±0.3008 keV
β⁻ decay energy with neutron	-7,709 ±0.2981 keV

Point at nuclide Decay chain of Silicon-32

33SiSilicon-33

Classification	z: 14; n: 19; m: 33
Half life	6.11 ±21 s
Natural abundance	synthetic nuclide
Spin/parity	3/2+
Decay modes	β⁻ decay
Discovery	1971
Mass excess	-20,520 ±0.699 keV
Binding energy	8,361 ±0.0212 keV
Single-particle energy	16,700 ±7.206 keV
Neutron separation energy	4,507 ±0.7596 keV
Q value for electron capture	-12,020 ±7.021 keV
β⁻ decay energy	5,823 ±1.294 keV
β⁻ decay energy with neutron	-4,281 ±0.6998 keV
Magnetic dipole moment	1.21 ±0.03 μN

Point at nuclide Decay chain of Silicon-33

34SiSilicon-34

Classification	z: 14; n: 20; m: 34
Half life	2.77 ±20 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay
Discovery	1971
Mass excess	-20,000 ±0.801 keV
Binding energy	8,337 ±0.0236 keV
Single-particle energy	18,780 ±7.032 keV
Neutron separation energy	7,548 ±1.062 keV
Q value for electron capture	-17,000 ±2.252 keV
β⁻ decay energy	4,557 ±1.139 keV
β⁻ decay energy with neutron	-1,726 ±1.352 keV

Point at nuclide Decay chain of Silicon-34

35SiSilicon-35

Classification	z: 14; n: 21; m: 35
Half life	0.78 ±12 s
Natural abundance	synthetic nuclide
Spin/parity	(7/2)-
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1971
Mass excess	-14,400 ±35.85 keV
Binding energy	8,169 ±1.024 keV
Single-particle energy	18,680 ±35.91 keV
Neutron separation energy	2,471 ±35.86 keV
Q value for electron capture	-14,170 ±36.6 keV
β⁻ decay energy	10,460 ±35.9 keV
β⁻ decay energy with neutron	2,085 ±35.86 keV
Magnetic dipole moment	-1.639 ±0.004 μN

Point at nuclide Decay chain of Silicon-35

36SiSilicon-36

Classification	z: 14; n: 22; m: 36
Half life	0.45 ±6 s
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1971
Mass excess	-12,440 ±71.79 keV
Binding energy	8,112 ±1.994 keV
Single-particle energy	19,500 ±72.17 keV
Neutron separation energy	6,115 ±80.25 keV
Q value for electron capture	-18,390 ±165.8 keV
β⁻ decay energy	7,814 ±72.98 keV
β⁻ decay energy with neutron	4,350 ±71.82 keV

Point at nuclide Decay chain of Silicon-36

37SiSilicon-37

Classification	z: 14; n: 23; m: 37
Half life	90 ±60 ms
Natural abundance	synthetic nuclide
Spin/parity	(5/2-)
Decay modes	β⁻ decay; β⁻ decay with neutron emission; β⁻ decay with two-neutron emission
Discovery	1979
Mass excess	-6,572 ±113.8 keV
Binding energy	7,952 ±3.075 keV
Single-particle energy	19,810 ±187.8 keV
Neutron separation energy	2,206 ±134.5 keV
Q value for electron capture	-16,390 ±213.1 keV
β⁻ decay energy	12,420 ±119.9 keV
β⁻ decay energy with neutron	5,608 ±114.5 keV

Point at nuclide Decay chain of Silicon-37

38SiSilicon-38

Classification	z: 14; n: 24; m: 38
Half life	63 ±8 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1979
Mass excess	-4,171 ±104.7 keV
Binding energy	7,892 ±2.757 keV
Single-particle energy	21,260 ±208.4 keV
Neutron separation energy	5,670 ±154.7 keV
Q value for electron capture	-20,650 ±182.9 keV
β⁻ decay energy	10,450 ±127.4 keV
β⁻ decay energy with neutron	6,754 ±111.4 keV

Point at nuclide Decay chain of Silicon-38

39SiSilicon-39

Classification	z: 14; n: 25; m: 39
Half life	47.5 ±20 ms
Natural abundance	synthetic nuclide
Spin/parity	(5/2-)
Decay modes	β⁻ decay; β⁻ decay with two-neutron emission; β⁻ decay with neutron emission
Discovery	1979
Mass excess	2,320 ±135.5 keV
Binding energy	7,730 ±3.475 keV
Single-particle energy	21,430 ±202 keV
Neutron separation energy	1,580 ±171.3 keV
Q value for electron capture	-19,170 ±329.1 keV
β⁻ decay energy	15,090 ±176.2 keV
β⁻ decay energy with neutron	8,870 ±153.7 keV

Point at nuclide Decay chain of Silicon-39

40SiSilicon-40

Classification	z: 14; n: 26; m: 40
Half life	33 ±10 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with two-neutron emission; β⁻ decay with neutron emission
Discovery	1989
Mass excess	5,666 ±121.9 keV
Binding energy	7,655 ±3.049 keV
Single-particle energy	23,110 ±324 keV
Neutron separation energy	4,724 ±182.3 keV
Q value for electron capture	-23,160 ±323.8 keV
β⁻ decay energy	13,800 ±147.8 keV
β⁻ decay energy with neutron	10,370 ±166 keV

Point at nuclide Decay chain of Silicon-40

41SiSilicon-41

Classification	z: 14; n: 27; m: 41
Half life	20 ±25 ms
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	1989
Mass excess	13,200 ±300 keV
Binding energy	7,482 ±7 keV
Single-particle energy	22,900 ±424 keV
Neutron separation energy	538 ±324 keV
Q value for electron capture	-21,390 ±500 keV
β⁻ decay energy	18,180 ±323 keV
β⁻ decay energy with neutron	13,260 ±311 keV

Point at nuclide Decay chain of Silicon-41

42SiSilicon-42

Classification	z: 14; n: 28; m: 42
Half life	12.5 ±35 ms
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission; β⁻ decay with two-neutron emission
Discovery	1990
Mass excess	16,840 ±300 keV
Binding energy	7,410 ±7 keV
Single-particle energy	25,040 ±500 keV
Neutron separation energy	4,432 ±424 keV
Q value for electron capture	-25,150 ±583 keV
β⁻ decay energy	15,740 ±315 keV
β⁻ decay energy with neutron	13,740 ±323 keV

Point at nuclide Decay chain of Silicon-42

43SiSilicon-43

Classification	z: 14; n: 29; m: 43
Half life	60 ns
Natural abundance	synthetic nuclide
Decay modes	β⁻ decay; β⁻ decay with neutron emission; β⁻ decay with two-neutron emission
Discovery	2002
Mass excess	24,330 ±400 keV
Binding energy	7,251 ±9 keV
Single-particle energy	24,940 ±640 keV
Neutron separation energy	581 ±500 keV
Q value for electron capture	-23,940 ±721.1 keV
β⁻ decay energy	19,280 ±500 keV
β⁻ decay energy with neutron	15,160 ±411 keV

Point at nuclide Decay chain of Silicon-43

44SiSilicon-44

Classification	z: 14; n: 30; m: 44
Half life	360 ns
Natural abundance	synthetic nuclide
Spin/parity	0+
Decay modes	β⁻ decay; β⁻ decay with neutron emission
Discovery	2007
Mass excess	29,310 ±500 keV
Binding energy	7,156 ±11 keV
Single-particle energy	26,240 ±781 keV
Neutron separation energy	3,091 ±640 keV
β⁻ decay energy	18,200 ±640 keV
β⁻ decay energy with neutron	16,190 ±583 keV

Point at nuclide Decay chain of Silicon-44

Isotopes of Silicon

22SiSilicon-22ads_clickcall_splitdownload

23SiSilicon-23ads_clickcall_splitdownload

24SiSilicon-24ads_clickcall_splitdownload

25SiSilicon-25ads_clickcall_splitdownload

26SiSilicon-26ads_clickcall_splitdownload

27SiSilicon-27ads_clickcall_splitdownload

28SiSilicon-28ads_clickdownload

29SiSilicon-29ads_clickdownload

30SiSilicon-30ads_clickdownload

31SiSilicon-31ads_clickcall_splitdownload

32SiSilicon-32ads_clickcall_splitdownload

33SiSilicon-33ads_clickcall_splitdownload

34SiSilicon-34ads_clickcall_splitdownload

35SiSilicon-35ads_clickcall_splitdownload

36SiSilicon-36ads_clickcall_splitdownload

37SiSilicon-37ads_clickcall_splitdownload

38SiSilicon-38ads_clickcall_splitdownload

39SiSilicon-39ads_clickcall_splitdownload

40SiSilicon-40ads_clickcall_splitdownload

41SiSilicon-41ads_clickcall_splitdownload

42SiSilicon-42ads_clickcall_splitdownload

43SiSilicon-43ads_clickcall_splitdownload

44SiSilicon-44ads_clickcall_splitdownload

22SiSilicon-22

23SiSilicon-23

24SiSilicon-24

25SiSilicon-25

26SiSilicon-26

27SiSilicon-27

28SiSilicon-28

29SiSilicon-29

30SiSilicon-30

31SiSilicon-31

32SiSilicon-32

33SiSilicon-33

34SiSilicon-34

35SiSilicon-35

36SiSilicon-36

37SiSilicon-37

38SiSilicon-38

39SiSilicon-39

40SiSilicon-40

41SiSilicon-41

42SiSilicon-42

43SiSilicon-43

44SiSilicon-44