55 – Caesium, Cs

PERIODIC TABLE

Spectrograph

Elemental Tile

Caesium

Caesium is highly reactive and ignites spontaneously in air and explosively with water even at low temperatures. Since 1990, the largest application of the element has been as caesium formate for drilling fluids and has a range of applications in the production of electricity, in electronics, and in chemistry.

1860 by Gustav Kirchhoff and Robert Bunsen, Germany.

DISCOVERY

Latin, 'caesius' meaning “sky blue” or 'heavenly blue'.

ETYMOLOGY

Caesium

Element

Cs

Symbol

55 Atomic Number

Alkali Metal

Classification

7440-46-2

CAS Number

Silver

Elemental Colour

-

Refractive Index

-

Poisson Ratio

70.732 cm³

Molar Volume

140.00k Pa, 1.381'7 Atm

1.381'7 Atm

Brinell Hardness

0.20 Mohs Hardness

-

Vickers Hardness

1,651 m/s, Mach 4.813'4

1,651 m/s

Speed of Sound

1.60G Pa, 15.790'8k Atm

15.790'8k Atm

Bulk Modulus

-

Shear Modulus

1.70G Pa, 16.777'7k Atm

Young Modulus

Allotropes

301.59 K, 28.44 °C

28.44 °C

Melting Point

944.15 K, 671.00 °C

671.00 °C

Boiling Point

-

Automatic Ignition

-

Flashpoint

1,938.00 K, 1,664.85 °C

1,664.85 °C

Critical Temperature

9.40M Pa, 93 Atm

93 Atm

Critical Pressure

36.000'000 W/(m K)

Thermal Conductivity

-

Thermal Expansion

242.00 J/(kg K)

Specific Heat

2.090 kJ/mol

Heat Fusion

65.000 kJ/mol

Heat Vaporisation

-

Heat Combustion

-

Curie Point

-

Neel Point

-

Adiabatic Index

Solid

Phase

Conductor

Electrical Type

5.00M S/m

Conductivity

200.00n Ω.m

Resistivity

-

Superconducting Point

-

Magnetic Type

-0.000'000'002'8

Mass Susceptibility

-0.000'000'000'372'00

Molar Susceptibility

-0.000'005'260'00

Volume Susceptibility

Material Composition

0.000'000'1 %

Universe

0.000'014 %

Meteorites

0.000'000'8 %

Sun

0.000'19 %

Earth Crust

0.000'000'05 %

Oceans

0.000'002 %

Humans

132.905'451'9

Atomic Weight

298 pm

Atomic Radius

232 pm

Covalent Radius Single Bond

209 pm

Covalent Radius Double Bond

-

Covalent Radius Triple Bond

343 pm

Van der Waals Radius

[Xe]6s¹

Electron Configuration

Cubic, Body-centred

Crystal Structure

1.879'00 g/cm³

Density as Solid

1.843'00 g/cm³

Density as Liquid

-

Density as Gas

lm_3m

Space Group Name

229 Space Group Number

π/2, π/2 & π/2

Lattice Angles

614.1, 614.1 & 614.1 pm

Lattice Constants

1 Valence

0.79 Electronegativity

45.51 kJ/mol

Electron Affinity

Ionisation Energy

Stable

Half Life

Stable

Lifetime

6s¹ = 6, 0, 0, +1/2

Quantum Numbers

3.900'00 b σ_s

Neutron Cross Section

29.000'00 b σ_a

Neutron Mass Absorption

Stable Isotopes

Unstable Isotopes

Isotopes Overview

Isotope	Stability	Symbol	Type	Protons		Neutrons		Spin	Parity	Mass		Abundance		Mass Measure	Mass Excess		Binding Energy		Dipole Moment		Quadrupole Moment		Halflife in Years		Halflife in Seconds		A01 Decay Probability		A01 Decay Mode	A01 Decay Energy		A01 Decay Daughter	A01 Decay Link	A02 Decay Mode	A02 Decay Energy		A02 Decay Daughter	A02 Decay Link	A03 Decay Probability		A03 Decay Mode	A03 Decay Energy		A03 Decay Daughter	A03 Decay Link	A04 Decay Probability		A04 Decay Mode	A04 Decay Energy		Y01 Decay Product Yield		Y01 Decay Product Nuclide	Y02 Decay Product Yield		Y02 Decay Product Nuclide	Y03 Decay Product Yield		Y03 Decay Product Nuclide	Y04 Decay Product Yield		Y04 Decay Product Nuclide	Y05 Decay Product Yield		Y05 Decay Product Nuclide
Isotope_055_cs_112_u	Unstable	¹¹²Cs	Fermion	55	p	57	n	1	1	111.950'301'000'0	u	~ 0	%	~ 0	-46.294'000'000'0	MeV	8.100'000'000'0	MeV	-		-		1.58E-11	year	500.000	micro-seconds ( x⁻⁶ )	100.000'000	%	p	814.300	keV	¹¹¹Xe	¹¹²Cs > [ 100 % , p , 814.3 keV ] > ¹¹¹Xe																		90.000'000	%	¹¹¹Cd	7.000'000	%	¹⁰³Rh	3.079'200	%	¹⁰⁷Ag	?	%	¹¹⁰Cd	?	%	¹⁰²Ru
Isotope_055_cs_113_u	Unstable	¹¹³Cs	Boson	55	p	58	n	5/2	1	112.944'493'274'0	u	~ 0	%	~ 0	-51.704'182'000'0	MeV	8.148'088'000'0	MeV	-		-		5.29E-13	year	16.700	micro-seconds ( x⁻⁶ )	100.000'000	%	p	973.530	keV	¹¹²Xe	¹¹³Cs > [ 100 % , p , 973.53 keV ] > ¹¹²Xe	α	3,484.350	keV	¹⁰⁹I	¹¹³Cs > [ , α , 3,484.35 keV ] > ¹⁰⁹I													0.880'000	%	¹¹¹Cd	0.441'585	%	¹⁰⁴Pd	0.021'600	%	¹⁰⁷Ag	?	%	¹⁰⁸Pd	?	%	¹¹²Cd
Isotope_055_cs_114_u	Unstable	¹¹⁴Cs	Fermion	55	p	59	n	1	1	113.941'450'000'0	u	~ 0	%	~ 0	-54.539'000'000'0	MeV	8.172'000'000'0	MeV	-		-		1.81E-8	year	570.000	milli-seconds ( x⁻³ )	91.000'000	%	β+	11,525.000	keV	¹¹⁴Xe	¹¹⁴Cs > [ 91 % , β+ , 11,525.0 keV ] > ¹¹⁴Xe	β+p	?	keV	¹¹³I	¹¹⁴Cs > [ , β+p , ? keV ] > ¹¹³I	0.190'000	%	β+α	?	keV	¹¹⁰Te	¹¹⁴Cs > [ 0.19 % , β+α , ? keV ] > ¹¹⁰Te	0.018'000	%	α	3,357.000	keV	91.000'000	%	¹¹⁴Sn	8.700'000	%	¹¹³In	0.190'000	%	¹¹⁰Cd	0.001'980	%	¹⁰⁹Ag	?	%	¹⁰⁶Pd
Isotope_055_cs_115_u	Unstable	¹¹⁵Cs	Boson	55	p	60	n	9/2	1	114.935'910'000'0	u	~ 0	%	~ 0	-59.699'000'000'0	MeV	8.216'000'000'0	MeV	-		-		4.44E-8	year	1.400	seconds ( x⁰ )	100.000'000	%	β+	7,935.000	keV	¹¹⁵Xe	¹¹⁵Cs > [ 100 % , β+ , 7,935.0 keV ] > ¹¹⁵Xe	β+p	?	keV	¹¹⁴I	¹¹⁵Cs > [ , β+p , ? keV ] > ¹¹⁴I													100.000'000	%	¹¹⁵Sn	0.410'000	%	¹¹⁴Sn	0.000'300	%	¹¹¹Cd	?	%	¹¹³In
Isotope_055_cs_116_u	Unstable	¹¹⁶Cs	Fermion	55	p	61	n	1	1	115.933'367'000'0	u	~ 0	%	~ 0	-62.068'000'000'0	MeV	8.235'000'000'0	MeV	-		-		2.22E-8	year	700.000	milli-seconds ( x⁻³ )	100.000'000	%	β+	9,957.000	keV	¹¹⁶Xe	¹¹⁶Cs > [ 100 % , β+ , 9,957.0 keV ] > ¹¹⁶Xe	β+p	?	keV	¹¹⁵I	¹¹⁶Cs > [ , β+p , ? keV ] > ¹¹⁵I	0.049'000	%	β+α	?	keV	¹¹²Te	¹¹⁶Cs > [ 0.049 % , β+α , ? keV ] > ¹¹²Te						100.000'000	%	¹¹⁶Sn	0.280'000	%	¹¹⁵Sn	?	%	¹¹²Cd
Isotope_055_cs_117_u	Unstable	¹¹⁷Cs	Boson	55	p	62	n	9/2	1	116.928'670'701'0	u	~ 0	%	~ 0	-66.442'814'000'0	MeV	8.271'435'000'0	MeV	-		-		2.66E-7	year	8.400	seconds ( x⁰ )	100.000'000	%	β+	6,720.300	keV	¹¹⁷Xe	¹¹⁷Cs > [ 100 % , β+ , 6,720.3 keV ] > ¹¹⁷Xe																		100.000'000	%	¹¹⁷Sn	0.002'900	%	¹¹⁶Sn
Isotope_055_cs_118_u	Unstable	¹¹⁸Cs	Fermion	55	p	63	n	2	0	117.926'559'494'0	u	~ 0	%	~ 0	-68.409'391'000'0	MeV	8.286'405'000'0	MeV	3.876'000'000'0	nm	1.400'000'000'0	b	4.44E-7	year	14.000	seconds ( x⁰ )	100.000'000	%	β+	8,647.500	keV	¹¹⁸Xe	¹¹⁸Cs > [ 100 % , β+ , 8,647.5 keV ] > ¹¹⁸Xe	β+p	?	keV	¹¹⁷I	¹¹⁸Cs > [ , β+p , ? keV ] > ¹¹⁷I	0.001'200	%	β+α	?	keV	¹¹⁴Te	¹¹⁸Cs > [ 0.0012 % , β+α , ? keV ] > ¹¹⁴Te						100.000'000	%	¹¹⁸Sn	0.021'000	%	¹¹⁷Sn	0.001'200	%	¹¹⁴Sn
Isotope_055_cs_119_u	Unstable	¹¹⁹Cs	Boson	55	p	64	n	9/2	1	118.922'377'304'0	u	~ 0	%	~ 0	-72.305'075'000'0	MeV	8.317'334'000'0	MeV	5.460'000'000'0	nm	2.800'000'000'0	b	1.36E-6	year	43.020	seconds ( x⁰ )	100.000'000	%	β+	5,497.200	keV	¹¹⁹Xe	¹¹⁹Cs > [ 100 % , β+ , 5,497.2 keV ] > ¹¹⁹Xe	β+α	?	keV	¹¹⁵Te	¹¹⁹Cs > [ , β+α , ? keV ] > ¹¹⁵Te													79.000'000	%	¹¹⁹Sn	0.000'002	%	¹¹⁵Sn
Isotope_055_cs_120_u	Unstable	¹²⁰Cs	Fermion	55	p	65	n	2	-1	119.920'677'253'0	u	~ 0	%	~ 0	-73.888'663'000'0	MeV	8.328'8.328'8.328'8.328	MeV	3.870'000'000'0	nm	1.450'000'000'0	b	1.94E-6	year	61.200	seconds ( x⁰ )	100.000'000	%	β+	7,261.600	keV	¹¹²Xe	¹²⁰Cs > [ 100 % , β+ , 7,261.6 keV ] > ¹¹²Xe	β+α	?	keV	¹¹⁶Te	¹²⁰Cs > [ , β+α , ? keV ] > ¹¹⁶Te	0.000'007	%	β+p	?	keV	¹¹⁹I	¹²⁰Cs > [ 0.000007 % , β+p , ? keV ] > ¹¹⁹I						0.000'020	%	¹¹⁶Sn	0.000'007	%	¹¹⁹Sn	?	%	¹²⁰Sn
Isotope_055_cs_121_u	Unstable	¹²¹Cs	Boson	55	p	66	n	3/2	1	120.917'229'209'0	u	~ 0	%	~ 0	-77.100'495'000'0	MeV	8.352'899'000'0	MeV	0.770'000'000'0	nm	0.838'000'000'0	b	4.91E-6	year	154.980	seconds ( x⁰ )	100.000'000	%	β+	4,350.100	keV	¹²¹Xe	¹²¹Cs > [ 100 % , β+ , 4,350.1 keV ] > ¹²¹Xe																		100.000'000	%	¹²¹Sb
Isotope_055_cs_122_u	Unstable	¹²²Cs	Fermion	55	p	67	n	1	1	121.916'113'434'0	u	~ 0	%	~ 0	-78.139'833'000'0	MeV	8.359'110'000'0	MeV	0.133'300'000'0	nm	-0.190'000'000'0	b	4.03E-5	year	1.271	kilo-seconds ( x³ )	100.000'000	%	β+	6,193.000	keV	¹²²Xe	¹²²Cs > [ 100 % , β+ , 6,193.0 keV ] > ¹²²Xe	β+α	?	keV	¹¹⁸Te	¹²²Cs > [ , β+α , ? keV ] > ¹¹⁸Te													100.000'000	%	¹²²Te	0.000'000	%	¹¹⁸Sn
Isotope_055_cs_123_u	Unstable	¹²³Cs	Boson	55	p	68	n	1/2	1	122.912'996'036'0	u	~ 0	%	~ 0	-81.043'671'000'0	MeV	8.380'379'000'0	MeV	1.377'000'000'0	nm	-		1.12E-5	year	352.020	seconds ( x⁰ )	100.000'000	%	β+	3,182.700	keV	¹²³Xe	¹²³Cs > [ 100 % , β+ , 3,182.7 keV ] > ¹²³Xe																		100.000'000	%	¹²³Sb
Isotope_055_cs_124_u	Unstable	¹²⁴Cs	Fermion	55	p	69	n	1	1	123.912'257'798'0	u	~ 0	%	~ 0	-81.731'335'000'0	MeV	8.383'432'000'0	MeV	0.673'000'000'0	nm	-0.740'000'000'0	b	9.79E-7	year	30.900	seconds ( x⁰ )	100.000'000	%	β+	4,906.570	keV	¹²⁴Xe	¹²⁴Cs > [ 100 % , β+ , 4,906.57 keV ] > ¹²⁴Xe																		?	%	¹²⁴Te
Isotope_055_cs_125_u	Unstable	¹²⁵Cs	Boson	55	p	70	n	1/2	1	124.909'728'270'0	u	~ 0	%	~ 0	-84.087'575'000'0	MeV	8.399'785'000'0	MeV	1.409'000'000'0	nm	-		8.56E-5	year	2.700	kilo-seconds ( x³ )	100.000'000	%	β+	2,082.290	keV	¹²⁵Xe	¹²⁵Cs > [ 100 % , β+ , 2,082.29 keV ] > ¹²⁵Xe																		100.000'000	%	¹²⁵Te
Isotope_055_cs_126_u	Unstable	¹²⁶Cs	Fermion	55	p	71	n	1	1	125.909'451'977'0	u	~ 0	%	~ 0	-84.344'940'000'0	MeV	8.399'221'000'0	MeV	0.777'000'000'0	nm	-0.680'000'000'0	b	3.12E-6	year	98.400	seconds ( x⁰ )	100.000'000	%	β+	3,801.400	keV	¹²⁶Xe	¹²⁶Cs > [ 100 % , β+ , 3,801.4 keV ] > ¹²⁶Xe																		?	%	¹²⁶Te
Isotope_055_cs_127_u	Unstable	¹²⁷Cs	Boson	55	p	72	n	1/2	1	126.907'417'525'0	u	~ 0	%	~ 0	-86.240'020'000'0	MeV	8.411'561'000'0	MeV	1.459'000'000'0	nm	-		7.13E-4	year	22.500	kilo-seconds ( x³ )	100.000'000	%	β+	1,058.570	keV	¹²⁷Xe	¹²⁷Cs > [ 100 % , β+ , 1,058.57 keV ] > ¹²⁷Xe																		100.000'000	%	¹²⁷I
Isotope_055_cs_128_u	Unstable	¹²⁸Cs	Fermion	55	p	73	n	1	1	127.907'748'866'0	u	~ 0	%	~ 0	-85.931'378'000'0	MeV	8.406'491'000'0	MeV	0.974'000'000'0	nm	-0.570'000'000'0	b	6.91E-6	year	217.980	seconds ( x⁰ )	100.000'000	%	β+	2,906.460	keV	¹²⁸Xe	¹²⁸Cs > [ 100 % , β+ , 2,906.46 keV ] > ¹²⁸Xe																		100.000'000	%	¹²⁸Xe
Isotope_055_cs_129_u	Unstable	¹²⁹Cs	Boson	55	p	74	n	1/2	1	128.906'064'426'0	u	~ 0	%	~ 0	-87.500'424'000'0	MeV	8.416'056'000'0	MeV	1.491'000'000'0	nm	-		3.66E-3	year	115.396	kilo-seconds ( x³ )	100.000'000	%	β+	174.760	keV	¹²⁹Xe	¹²⁹Cs > [ 100 % , β+ , 174.76 keV ] > ¹²⁹Xe																		100.000'000	%	¹²⁹Xe
Isotope_055_cs_130_u	Unstable	¹³⁰Cs	Fermion	55	p	75	n	1	1	129.906'708'552'0	u	~ 0	%	~ 0	-86.900'424'000'0	MeV	8.409'8.409'8.409'8.409	MeV	1.460'000'000'0	nm	0.059'000'000'0	b	5.55E-5	year	1.753	kilo-seconds ( x³ )	98.400'000	%	β+	1,959.090	keV	¹³⁰Xe	¹³⁰Cs > [ 98.4 % , β+ , 1,959.09 keV ] > ¹³⁰Xe	β-	361.180	keV	¹³⁰Ba	¹³⁰Cs > [ , β- , 361.18 keV ] > ¹³⁰Ba													98.400'000	%	¹³⁰Xe
Isotope_055_cs_131_u	Unstable	¹³¹Cs	Boson	55	p	76	n	5/2	1	130.905'463'926'0	u	~ 0	%	~ 0	-88.059'787'000'0	MeV	8.415'063'000'0	MeV	3.543'000'000'0	nm	-0.575'000'000'0	b	2.65E-2	year	837.104	kilo-seconds ( x³ )	100.000'000	%	ϵ	355.420	keV	¹³¹Xe	¹³¹Cs > [ 100 % , ϵ , 355.42 keV ] > ¹³¹Xe																		100.000'000	%	¹³¹Xe
Isotope_055_cs_132_u	Unstable	¹³²Cs	Fermion	55	p	77	n	2	1	131.906'434'260'0	u	~ 0	%	~ 0	-87.155'926'000'0	MeV	8.405'612'000'0	MeV	2.222'000'000'0	nm	0.508'000'000'0	b	1.77E-2	year	559.803	kilo-seconds ( x³ )	98.130'000	%	β+	1,102.350	keV	¹³²Xe	¹³²Cs > [ 98.13 % , β+ , 1,102.35 keV ] > ¹³²Xe	β-	1,278.920	keV	¹³²Ba	¹³²Cs > [ , β- , 1,278.92 keV ] > ¹³²Ba													98.130'000	%	¹³²Xe
Isotope_055_cs_133_s	Stable	¹³³Cs	Boson	55	p	78	n	7/2	1	132.905'451'932'0	u	100.000'000	%	132.905'451'932'0	-88.070'958'000'0	MeV	8.409'978'000'0	MeV	2.582'025'000'0	nm	-0.003'710'000'0	b	-
Isotope_055_cs_134_u	Unstable	¹³⁴Cs	Fermion	55	p	79	n	4	1	133.906'718'475'0	u	~ 0	%	~ 0	-86.891'181'000'0	MeV	8.398'646'000'0	MeV	2.993'700'000'0	nm	0.389'000'000'0	b	2.07E+0	years	65.204	mega-seconds ( x⁶ )	100.000'000	%	β-	2,058.687	keV	¹³⁴Ba	¹³⁴Cs > [ 100 % , β- , 2,058.687 keV ] > ¹³⁴Ba	ϵ	1,233.309	keV	¹³⁴Xe	¹³⁴Cs > [ , ϵ , 1,233.309 keV ] > ¹³⁴Xe													100.000'000	%	¹³⁴Ba
Isotope_055_cs_135_u	Unstable	¹³⁵Cs	Boson	55	p	80	n	7/2	1	134.905'977'008'0	u	~ 0	%	~ 0	-87.581'853'000'0	MeV	8.401'338'000'0	MeV	2.732'2.732'2.732'2.732	nm	0.050'000'000'0	b	2.31E+6	years	72.898	tera-seconds ( x¹² )	100.000'000	%	β-	268.660	keV	¹³⁵Ba	¹³⁵Cs > [ 100 % , β- , 268.66 keV ] > ¹³⁵Ba																		100.000'000	%	¹³⁵Ba
Isotope_055_cs_136_u	Unstable	¹³⁶Cs	Fermion	55	p	81	n	5	1	135.907'311'576'0	u	~ 0	%	~ 0	-86.338'711'000'0	MeV	8.389'770'000'0	MeV	3.711'000'000'0	nm	0.225'000'000'0	b	1.32E+1	years	415.298	mega-seconds ( x⁶ )	100.000'000	%	β-	2,548.220	keV	¹³⁶Ba	¹³⁶Cs > [ 100 % , β- , 2,548.22 keV ] > ¹³⁶Ba																		100.000'000	%	¹³⁶Ba
Isotope_055_cs_137_u	Unstable	¹³⁷Cs	Boson	55	p	82	n	7/2	1	136.907'089'473'0	u	~ 0	%	~ 0	-86.545'599'000'0	MeV	8.388'956'000'0	MeV	2.841'300'000'0	nm	0.051'000'000'0	b	3.02E+1	years	952.633	mega-seconds ( x⁶ )	100.000'000	%	β-	1,175.628	keV	¹³⁷Ba	¹³⁷Cs > [ 100 % , β- , 1,175.628 keV ] > ¹³⁷Ba																		100.000'000	%	¹³⁷Ba
Isotope_055_cs_138_u	Unstable	¹³⁸Cs	Fermion	55	p	83	n	3	-1	137.911'016'704'0	u	~ 0	%	~ 0	-82.887'407'000'0	MeV	8.360'146'000'0	MeV	0.700'000'000'0	nm	0.125'000'000'0	b	6.35E-5	year	2.005	kilo-seconds ( x³ )	100.000'000	%	β-	53,740.220	keV	¹³⁸Ba	¹³⁸Cs > [ 100 % , β- , 53,740.22 keV ] > ¹³⁸Ba																		100.000'000	%	¹³⁸Ba
Isotope_055_cs_139_u	Unstable	¹³⁹Cs	Boson	55	p	84	n	7/2	1	138.913'363'999'0	u	~ 0	%	~ 0	-80.700'915'000'0	MeV	8.342'338'000'0	MeV	2.696'000'000'0	nm	-0.075'000'000'0	b	1.76E-5	year	556.020	seconds ( x⁰ )	100.000'000	%	β-	4,212.830	keV	¹³⁹Ba	¹³⁹Cs > [ 100 % , β- , 4,212.83 keV ] > ¹³⁹Ba																		100.000'000	%	¹³⁹La
Isotope_055_cs_140_u	Unstable	¹⁴⁰Cs	Fermion	55	p	85	n	1	-1	139.917'282'354'0	u	~ 0	%	~ 0	-77.050'992'000'0	MeV	8.314'331'000'0	MeV	0.133'895'300'0	nm	-0.112'000'000'0	b	2.02E-6	year	63.720	seconds ( x⁰ )	100.000'000	%	β-	6,220.380	keV	¹⁴⁰Ba	¹⁴⁰Cs > [ 100 % , β- , 6,220.38 keV ] > ¹⁴⁰Ba																		100.000'000	%	¹⁴⁰Ce
Isotope_055_cs_141_u	Unstable	¹⁴¹Cs	Boson	55	p	86	n	7/2	1	140.920'045'752'0	u	~ 0	%	~ 0	-74.476'902'000'0	MeV	8.294'351'000'0	MeV	2.438'000'000'0	nm	-0.360'000'000'0	b	7.87E-7	year	24.840	seconds ( x⁰ )	100.000'000	%	β-	5,248.700	keV	¹⁴¹Ba	¹⁴¹Cs > [ 100 % , β- , 5,248.7 keV ] > ¹⁴¹Ba	β-n	723.200	keV	¹⁴⁰Ba	¹⁴¹Cs > [ , β-n , 723.2 keV ] > ¹⁴⁰Ba													100.000'000	%	¹⁴¹Pr	0.035'000	%	¹⁴⁰Ce
Isotope_055_cs_142_u	Unstable	¹⁴²Cs	Fermion	55	p	87	n	0	-1	141.924'298'927'0	u	~ 0	%	~ 0	-70.515'096'000'0	MeV	8.264'881'000'0	MeV	-		-		5.35E-8	year	1.689	seconds ( x⁰ )	100.000'000	%	β-	7,308.000	keV	¹⁴²Ba	¹⁴²Cs > [ 100 % , β- , 7,308.0 keV ] > ¹⁴²Ba	β-n	1,139.200	keV	¹⁴¹Ba	¹⁴²Cs > [ , β-n , 1,139.2 keV ] > ¹⁴¹Ba													0.090'000	%	¹⁴¹Pr	?	%	¹⁴²Nd	?	%	¹³⁸Ba
Isotope_055_cs_143_u	Unstable	¹⁴³Cs	Boson	55	p	88	n	3/2	1	142.927'351'750'0	u	~ 0	%	~ 0	-67.671'410'000'0	MeV	8.244'8.244'8.244'8.244	MeV	0.870'000'000'0	nm	0.470'000'000'0	b	5.68E-8	year	1.791	seconds ( x⁰ )	98.000'000	%	β-	6,264.300	keV	¹⁴³Ba	¹⁴³Cs > [ 98 % , β- , 6,264.3 keV ] > ¹⁴³Ba	β-n	2,080.000	keV	¹⁴²Ba	¹⁴³Cs > [ , β-n , 2,080.0 keV ] > ¹⁴²Ba													98.000'000	%	¹⁴³Nd	?	%	¹⁴²Nd	?	%	¹³⁸Ba
Isotope_055_cs_144_u	Unstable	¹⁴⁴Cs	Fermion	55	p	89	n	1	-1	143.932'076'914'0	u	~ 0	%	~ 0	-63.269'947'000'0	MeV	8.211'879'000'0	MeV	-0.546'000'000'0	nm	0.300'000'000'0	b	3.15E-8	year	994.000	milli-seconds ( x⁻³ )	97.000'000	%	β-	8,499.000	keV	¹⁴⁴Ba	¹⁴⁴Cs > [ 97 % , β- , 8,499.0 keV ] > ¹⁴⁴Ba	β-n	2,594.500	keV	¹⁴³Ba	¹⁴⁴Cs > [ , β-n , 2,594.5 keV ] > ¹⁴³Ba													97.000'000	%	¹⁴⁰Ce	3.200'000	%	¹⁴³Nd
Isotope_055_cs_145_u	Unstable	¹⁴⁵Cs	Boson	55	p	90	n	3/2	1	144.935'526'170'0	u	~ 0	%	~ 0	-60.056'986'000'0	MeV	8.188'751'000'0	MeV	0.784'0.784'0.784'0.784	nm	0.620'000'000'0	b	1.84E-8	year	582.000	milli-seconds ( x⁻³ )	86.000'000	%	β-	7,358.000	keV	¹⁴⁵Ba	¹⁴⁵Cs > [ 86 % , β- , 7,358.0 keV ] > ¹⁴⁵Ba	β-n	3,640.600	keV	¹⁴⁴Ba	¹⁴⁵Cs > [ , β-n , 3,640.6 keV ] > ¹⁴⁴Ba													86.000'000	%	¹⁴³Nd	14.300'000	%	¹⁴⁰Ce
Isotope_055_cs_146_u	Unstable	¹⁴⁶Cs	Fermion	55	p	91	n	1	-1	145.940'289'423'0	u	~ 0	%	~ 0	-55.620'044'000'0	MeV	8.157'557'000'0	MeV	-0.515'000'000'0	nm	0.220'000'000'0	b	1.02E-8	year	323.000	milli-seconds ( x⁻³ )	86.000'000	%	β-	9,380.000	keV	¹⁴⁶Ba	¹⁴⁶Cs > [ 86 % , β- , 9,380.0 keV ] > ¹⁴⁶Ba	β-n	3,732.600	keV	¹⁴⁵Ba	¹⁴⁶Cs > [ , β-n , 3,732.6 keV ] > ¹⁴⁵Ba													14.200'000	%	¹⁴⁵Nd	?	%	¹⁴²Nd	?	%	¹³⁸Ba
Isotope_055_cs_147_u	Unstable	¹⁴⁷Cs	Boson	55	p	92	n	3/2	1	146.944'155'008'0	u	~ 0	%	~ 0	-52.019'275'000'0	MeV	8.132'475'000'0	MeV	-		-		7.13E-9	year	225.000	milli-seconds ( x⁻³ )	71.000'000	%	β-	8,579.000	keV	¹⁴⁷Ba	¹⁴⁷Cs > [ 71 % , β- , 8,579.0 keV ] > ¹⁴⁷Ba	β-n	4,909.500	keV	¹⁴⁶Ba	¹⁴⁷Cs > [ , β-n , 4,909.5 keV ] > ¹⁴⁶Ba													71.000'000	%	¹⁴³Nd	?	%	¹⁴²Nd	?	%	¹³⁸Ba
Isotope_055_cs_148_u	Unstable	¹⁴⁸Cs	Fermion	55	p	93	n	?	0	147.949'218'153'0	u	~ 0	%	~ 0	-47.302'986'000'0	MeV	8.100'195'000'0	MeV	-		-		4.53E-9	year	143.000	milli-seconds ( x⁻³ )	75.000'000	%	β-	10,710.000	keV	¹⁴⁸Ba	¹⁴⁸Cs > [ 75 % , β- , 10,710.0 keV ] > ¹⁴⁸Ba	β-n	5,224.000	keV	¹⁴⁷Ba	¹⁴⁸Cs > [ , β-n , 5,224.0 keV ] > ¹⁴⁷Ba													25.512'500	%	¹⁴³Nd	?	%	¹⁴²Nd	?	%	¹⁴⁰Ce	?	%	¹³⁸Ba
Isotope_055_cs_149_u	Unstable	¹⁴⁹Cs	Boson	55	p	94	n	3/2	1	148.952'930'000'0	u	~ 0	%	~ 0	-43.845'000'000'0	MeV	8.077'000'000'0	MeV	-		-		4.75E-9	year	150.000	milli-seconds ( x⁻³ )	?	%	β-	9,641.000	keV	¹⁴⁹Ba	¹⁴⁹Cs > [ ? % , β- , 9,641.0 keV ] > ¹⁴⁹Ba	β-n	6,097.000	keV	¹⁴⁸Ba	¹⁴⁹Cs > [ , β-n , 6,097.0 keV ] > ¹⁴⁸Ba													?	%	¹⁴³Nd	?	%	¹⁴³Nd	?	%	¹⁴⁰Ce	?	%	¹⁴⁵Nd	?	%	¹³⁸Ba
Isotope_055_cs_150_u	Unstable	¹⁵⁰Cs	Fermion	55	p	95	n	?	0	149.958'170'000'0	u	~ 0	%	~ 0	-38.964'000'000'0	MeV	8.044'000'000'0	MeV	-		-		3.17E-9	year	100.000	milli-seconds ( x⁻³ )	?	%	β-	11,634.000	keV	¹⁵⁰Ba	¹⁵⁰Cs > [ ? % , β- , 11,634.0 keV ] > ¹⁵⁰Ba	β-n	6,451.000	keV	¹⁴⁹Ba	¹⁵⁰Cs > [ , β-n , 6,451.0 keV ] > ¹⁴⁹Ba													?	%	¹⁵⁰Sm	?	%	¹⁴³Nd	?	%	¹⁴⁰Ce	?	%	¹⁴⁵Nd
Isotope_055_cs_151_u	Unstable	¹⁵¹Cs	Boson	55	p	96	n	3/2	1	150.962'190'000'0	u	~ 0	%	~ 0	-35.220'000'000'0	MeV	8.020'000'000'0	MeV	-		-		1.90E-9	year	60.000	milli-seconds ( x⁻³ )	?	%	β-	10,600.000	keV	¹⁵¹Ba	¹⁵¹Cs > [ ? % , β- , 10,600.0 keV ] > ¹⁵¹Ba	β-n	7,308.000	keV	¹⁵⁰Ba	¹⁵¹Cs > [ , β-n , 7,308.0 keV ] > ¹⁵⁰Ba													?	%	¹⁵⁰Sm	?	%	¹⁵¹Eu	?	%	¹⁴⁰Ce	?	%	¹⁴⁵Nd

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