Indium-132

Properties and data of the isotope ¹³²In.

Content

General data

Name of the isotope:Indium-132; In-132Symbol:¹³²In or 13249InMass number A:132 (= number of nucleons)Atomic number Z:49 (= number of protons)Neutrons N:83Isotopic mass:131.93300(6) u (atomic weight of Indium-132)Nuclide mass:131.9061211 u (calculated nuclear mass without electrons)Mass excess:-62.4101 MeVMass defect:1.169614596 u (per nucleus)Nuclear binding energy:1089.48897849 MeV (per nucleus)
8.25370438 MeV (average binding energy per nucleon)Separation energy:S_N = 2.46(6) MeV (first neutron)
S_P = 14.48(12) MeV (first proton)Half-life:200(2) msDecay constant λ:3.4657359027997 s^-1Specific activity α:1.593217541221 × 10⁺²² Bq g^-1
430599335465.24 Ci g^-1Spin and parity:
(nuclear angular momentum)(7-)Year of discovery:1973

Radioactive Decay

Half-life T_½ = 200(2) ms respectively 2.00 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹³²Sn	93.7(9) %	14.13(6) MeV
β^-, n	¹³¹Sn	6.3(9) %	6.78(6) MeV

Parent Nuclides

Direct parent isotope is: ¹³²Cd.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 83) and isobaric (same nucleon number A = 132) with Indium-132. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 83	Isobar A = 132
46	¹²⁹Pd
47	¹³⁰Ag	¹³²Ag
48	¹³¹Cd	¹³²Cd
49	¹³²In	¹³²In
50	¹³³Sn	¹³²Sn
51	¹³⁴Sb	¹³²Sb
52	¹³⁵Te	¹³²Te
53	¹³⁶I	¹³²I
54	¹³⁷Xe	¹³²Xe
55	¹³⁸Cs	¹³²Cs
56	¹³⁹Ba	¹³²Ba
57	¹⁴⁰La	¹³²La
58	¹⁴¹Ce	¹³²Ce
59	¹⁴²Pr	¹³²Pr
60	¹⁴³Nd	¹³²Nd
61	¹⁴⁴Pm	¹³²Pm
62	¹⁴⁵Sm	¹³²Sm
63	¹⁴⁶Eu	¹³²Eu
64	¹⁴⁷Gd
65	¹⁴⁸Tb
66	¹⁴⁹Dy
67	¹⁵⁰Ho
68	¹⁵¹Er
69	¹⁵²Tm
70	¹⁵³Yb
71	¹⁵⁴Lu
72	¹⁵⁵Hf
73	¹⁵⁶Ta
74	¹⁵⁷W