Cesium-114

Properties and data of the isotope ¹¹⁴Cs.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Cesium isotopes (and general data sources).

General data

Name of the isotope:Cesium-114; Cs-114Symbol:¹¹⁴Cs or 11455CsMass number A:114 (= number of nucleons)Atomic number Z:55 (= number of protons)Neutrons N:59Isotopic mass:113.94130(8) u (atomic weight of Cesium-114)Nuclide mass:113.9111301 u (calculated nuclear mass without electrons)Mass excess:-54.6787 MeVMass defect:1.000306804 u (per nucleus)Nuclear binding energy:931.77978609 MeV (per nucleus)
8.1735069 MeV (average binding energy per nucleon)Separation energy:S_N = 10.99(7) MeV (first neutron)Half-life:0.57(2) sDecay constant λ:1.2160476851929 s^-1Specific activity α:6.480717214718 × 10⁺²¹ Bq g^-1
175154519316.71 Ci g^-1Spin and parity:
(nuclear angular momentum)(1+)Year of discovery:1978

Radioactive Decay

Half-life T_½ = 0.57(2) s respectively 5.7 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy
EC/β⁺	¹¹⁴Xe	99.982(6) %	12.40(7) MeV
EC, p	¹¹³I	8.7(13) %
EC, α	¹¹⁰Te	0.19(3) %
α	¹¹⁰I	0.018(6) %	3,36(5) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁴Ba.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 114) with Cesium-114. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 59	Isobar A = 114
33	⁹²As
34	⁹³Se
35	⁹⁴Br
36	⁹⁵Kr
37	⁹⁶Rb
38	⁹⁷Sr
39	⁹⁸Y
40	⁹⁹Zr
41	¹⁰⁰Nb	¹¹⁴Nb
42	¹⁰¹Mo	¹¹⁴Mo
43	¹⁰²Tc	¹¹⁴Tc
44	¹⁰³Ru	¹¹⁴Ru
45	¹⁰⁴Rh	¹¹⁴Rh
46	¹⁰⁵Pd	¹¹⁴Pd
47	¹⁰⁶Ag	¹¹⁴Ag
48	¹⁰⁷Cd	¹¹⁴Cd
49	¹⁰⁸In	¹¹⁴In
50	¹⁰⁹Sn	¹¹⁴Sn
51	¹¹⁰Sb	¹¹⁴Sb
52	¹¹¹Te	¹¹⁴Te
53	¹¹²I	¹¹⁴I
54	¹¹³Xe	¹¹⁴Xe
55	¹¹⁴Cs	¹¹⁴Cs
56	¹¹⁵Ba	¹¹⁴Ba
57	¹¹⁶La