Xenon-132m

Properties and data of the isotope ¹³²Xe.

Content

General data

Name of the isotope:Xenon-132m; Xe-132mSymbol:¹³²Xe or 13254XeMass number A:132 (= number of nucleons)Atomic number Z:54 (= number of protons)Neutrons N:78Isotopic mass:131.90415509(4) u (atomic weight of Xenon-132m)
Excitation energy: 2752.21(17) keVNuclide mass:131.8745337 u (calculated nuclear mass without electrons)Mass excess:-89.27896 MeVMass defect:1.194260086 u (per nucleus)Nuclear binding energy:1112.44610455 MeV (per nucleus)
8.427622 MeV (average binding energy per nucleon)Half-life:8.39(11) msDecay constant λ:82.615873725858 s^-1Specific activity α:3.797896403388 × 10⁺²³ Bq g^-1
10264584874022 Ci g^-1Spin and parity:
(nuclear angular momentum)(10+)Magnetic dipole moment:μ(μ_N) = -1.95(5)Nuclear g-factor:g_l = -0.195

Radioactive Decay

Half-life T_½ = 8.39(11) ms respectively 8.39 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹³²Xe	100 %

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
¹³²Xe		stable	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 78) and isobaric (same nucleon number A = 132) with Xenon-132m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 78	Isobar A = 132
43	¹²¹Tc
44	¹²²Ru
45	¹²³Rh
46	¹²⁴Pd
47	¹²⁵Ag	¹³²Ag
48	¹²⁶Cd	¹³²Cd
49	¹²⁷In	¹³²In
50	¹²⁸Sn	¹³²Sn
51	¹²⁹Sb	¹³²Sb
52	¹³⁰Te	¹³²Te
53	¹³¹I	¹³²I
54	¹³²Xe	¹³²Xe
55	¹³³Cs	¹³²Cs
56	¹³⁴Ba	¹³²Ba
57	¹³⁵La	¹³²La
58	¹³⁶Ce	¹³²Ce
59	¹³⁷Pr	¹³²Pr
60	¹³⁸Nd	¹³²Nd
61	¹³⁹Pm	¹³²Pm
62	¹⁴⁰Sm	¹³²Sm
63	¹⁴¹Eu	¹³²Eu
64	¹⁴²Gd
65	¹⁴³Tb
66	¹⁴⁴Dy
67	¹⁴⁵Ho
68	¹⁴⁶Er
69	¹⁴⁷Tm
70	¹⁴⁸Yb
71	¹⁴⁹Lu