Xenon-119

Properties and data of the isotope ¹¹⁹Xe.

Content

General data

Name of the isotope:Xenon-119; Xe-119Symbol:¹¹⁹Xe or 11954XeMass number A:119 (= number of nucleons)Atomic number Z:54 (= number of protons)Neutrons N:65Isotopic mass:118.915411(11) u (atomic weight of Xenon-119)Nuclide mass:118.8857896 u (calculated nuclear mass without electrons)Mass excess:-78.79415 MeVMass defect:1.070360268 u (per nucleus)Nuclear binding energy:997.03416748 MeV (per nucleus)
8.37843838 MeV (average binding energy per nucleon)Separation energy:S_N = 8.787(15) MeV (first neutron)
S_P = 5.112(22) MeV (first proton)Half-life:5.8(3) minDecay constant λ:0.0019918022429883 s^-1Specific activity α:1.016518107831 × 10⁺¹⁹ Bq g^-1
274734623.7383 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2+)Magnetic dipole moment:μ(μ_N) = - 0.6542(15)Nuclear g-factor:g_l = -0.26168Year of discovery:1965

Radioactive Decay

Half-life T_½ = 5.8(3) min (minutes) respectively 3.48 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹¹⁹I	100 %	4.97(3) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁹Cs.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 65) and isobaric (same nucleon number A = 119) with Xenon-119. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 65	Isobar A = 119
36	¹⁰¹Kr
37	¹⁰²Rb
38	¹⁰³Sr
39	¹⁰⁴Y
40	¹⁰⁵Zr
41	¹⁰⁶Nb
42	¹⁰⁷Mo
43	¹⁰⁸Tc	¹¹⁹Tc
44	¹⁰⁹Ru	¹¹⁹Ru
45	¹¹⁰Rh	¹¹⁹Rh
46	¹¹¹Pd	¹¹⁹Pd
47	¹¹²Ag	¹¹⁹Ag
48	¹¹³Cd	¹¹⁹Cd
49	¹¹⁴In	¹¹⁹In
50	¹¹⁵Sn	¹¹⁹Sn
51	¹¹⁶Sb	¹¹⁹Sb
52	¹¹⁷Te	¹¹⁹Te
53	¹¹⁸I	¹¹⁹I
54	¹¹⁹Xe	¹¹⁹Xe
55	¹²⁰Cs	¹¹⁹Cs
56	¹²¹Ba	¹¹⁹Ba
57	¹²²La	¹¹⁹La
58	¹²³Ce	¹¹⁹Ce
59	¹²⁴Pr
60	¹²⁵Nd
61	¹²⁶Pm