Cerium-132m

Properties and data of the isotope ^132mCe.

Contents

General data

Name of the isotope:Cerium-132m; Ce-132mSymbol:^132mCe or 132m58CeMass number A:132 (= number of nucleons)Atomic number Z:58 (= number of protons)Neutrons N:74Isotopic mass:131.911464(22) u (atomic weight of Cerium-132m)
Excitation energy: 2341.15(21) keVNuclide mass:131.8796486 u (calculated nuclear mass without electrons)Mass excess:-82.47075 MeVMass defect:1.18359164 u (per nucleus)Nuclear binding energy:1102.50851111 MeV (per nucleus)
8.35233721 MeV (average binding energy per nucleon)Half-life:9.4(3) msDecay constant λ:73.739061761696 s^-1Specific activity α:3.389824555790 × 10⁺²³ Bq g^-1
9161687988622.2 Ci g^-1Spin and parity:
(nuclear angular momentum)(8-)

Radioactive Decay

Half-life T_½ = 9.4(3) ms respectively 9.4 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹³²Ce	100 %	2.340 MeV

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
¹³²Ce		3.51(11) h	0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 74) and isobaric (same nucleon number A = 132) with Cerium-132m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 74	Isobar A = 132
41	¹¹⁵Nb
42	¹¹⁶Mo
43	¹¹⁷Tc
44	¹¹⁸Ru
45	¹¹⁹Rh
46	¹²⁰Pd
47	¹²¹Ag	¹³²Ag
48	¹²²Cd	¹³²Cd
49	¹²³In	¹³²In
50	¹²⁴Sn	¹³²Sn
51	¹²⁵Sb	¹³²Sb
52	¹²⁶Te	¹³²Te
53	¹²⁷I	¹³²I
54	¹²⁸Xe	¹³²Xe
55	¹²⁹Cs	¹³²Cs
56	¹³⁰Ba	¹³²Ba
57	¹³¹La	¹³²La
58	¹³²Ce	¹³²Ce
59	¹³³Pr	¹³²Pr
60	¹³⁴Nd	¹³²Nd
61	¹³⁵Pm	¹³²Pm
62	¹³⁶Sm	¹³²Sm
63	¹³⁷Eu	¹³²Eu
64	¹³⁸Gd
65	¹³⁹Tb
66	¹⁴⁰Dy
67	¹⁴¹Ho