Xenon-116

Properties and data of the isotope ¹¹⁶Xe.

Content

General data

Name of the isotope:Xenon-116; Xe-116Symbol:¹¹⁶Xe or 11654XeMass number A:116 (= number of nucleons)Atomic number Z:54 (= number of protons)Neutrons N:62Isotopic mass:115.921581(14) u (atomic weight of Xenon-116)Nuclide mass:115.8919596 u (calculated nuclear mass without electrons)Mass excess:-73.04683 MeVMass defect:1.03819552 u (per nucleus)Nuclear binding energy:967.07289771 MeV (per nucleus)
8.33683533 MeV (average binding energy per nucleon)Separation energy:S_N = 12.461(18) MeV (first neutron)
S_P = 4.00(3) MeV (first proton)Half-life:59(2) sDecay constant λ:0.011748257297626 s^-1Specific activity α:6.152144374355 × 10⁺¹⁹ Bq g^-1
1662741722.7987 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:4.7211(95) femtometer fmYear of discovery:1969

Radioactive Decay

Half-life T_½ = 59(2) s respectively 5.9 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹¹⁶I	100 %	4.45(10) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁶Cs.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 62) and isobaric (same nucleon number A = 116) with Xenon-116. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 62	Isobar A = 116
35	⁹⁷Br
36	⁹⁸Kr
37	⁹⁹Rb
38	¹⁰⁰Sr
39	¹⁰¹Y
40	¹⁰²Zr
41	¹⁰³Nb
42	¹⁰⁴Mo	¹¹⁶Mo
43	¹⁰⁵Tc	¹¹⁶Tc
44	¹⁰⁶Ru	¹¹⁶Ru
45	¹⁰⁷Rh	¹¹⁶Rh
46	¹⁰⁸Pd	¹¹⁶Pd
47	¹⁰⁹Ag	¹¹⁶Ag
48	¹¹⁰Cd	¹¹⁶Cd
49	¹¹¹In	¹¹⁶In
50	¹¹²Sn	¹¹⁶Sn
51	¹¹³Sb	¹¹⁶Sb
52	¹¹⁴Te	¹¹⁶Te
53	¹¹⁵I	¹¹⁶I
54	¹¹⁶Xe	¹¹⁶Xe
55	¹¹⁷Cs	¹¹⁶Cs
56	¹¹⁸Ba	¹¹⁶Ba
57	¹¹⁹La	¹¹⁶La
58	¹²⁰Ce
59	¹²¹Pr