Iodine-132m

Properties and data of the isotope ¹³²I.

Content

General data

Name of the isotope:Iodine-132m; I-132mOther names:Jod-132mSymbol:¹³²I or 13253IMass number A:132 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:79Isotopic mass:131.907994(4) u (atomic weight of Iodine-132m)
Excitation energy: 120(20) keVNuclide mass:131.8789211 u (calculated nuclear mass without electrons)Mass excess:-85.70304 MeVMass defect:1.19126106 u (per nucleus)Nuclear binding energy:1109.65252982 MeV (per nucleus)
8.40645856 MeV (average binding energy per nucleon)Half-life:1.387(15) hDecay constant λ:0.0001388182289033 s^-1Specific activity α:6.381549071622 × 10⁺¹⁷ Bq g^-1
17247429.923305 Ci g^-1Spin and parity:
(nuclear angular momentum)(8-)

Radioactive Decay

Half-life T_½ = 1.387(15) h (hours) respectively 4.9932 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹³²Xe	14(2) %
Iso	¹³²I	86(2) %

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
¹³²I		2.295(13) h	4+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 79) and isobaric (same nucleon number A = 132) with Iodine-132m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 79	Isobar A = 132
44	¹²³Ru
45	¹²⁴Rh
46	¹²⁵Pd
47	¹²⁶Ag	¹³²Ag
48	¹²⁷Cd	¹³²Cd
49	¹²⁸In	¹³²In
50	¹²⁹Sn	¹³²Sn
51	¹³⁰Sb	¹³²Sb
52	¹³¹Te	¹³²Te
53	¹³²I	¹³²I
54	¹³³Xe	¹³²Xe
55	¹³⁴Cs	¹³²Cs
56	¹³⁵Ba	¹³²Ba
57	¹³⁶La	¹³²La
58	¹³⁷Ce	¹³²Ce
59	¹³⁸Pr	¹³²Pr
60	¹³⁹Nd	¹³²Nd
61	¹⁴⁰Pm	¹³²Pm
62	¹⁴¹Sm	¹³²Sm
63	¹⁴²Eu	¹³²Eu
64	¹⁴³Gd
65	¹⁴⁴Tb
66	¹⁴⁵Dy
67	¹⁴⁶Ho
68	¹⁴⁷Er
69	¹⁴⁸Tm
70	¹⁴⁹Yb
71	¹⁵⁰Lu