Gold-196m2

Properties and data of the isotope ¹⁹⁶Au.

Content

General data

Name of the isotope:Gold-196m2; Au-196m2Symbol:¹⁹⁶Au or 19679AuMass number A:196 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:117Isotopic mass:195.966571(3) u (atomic weight of Gold-196m2)
Excitation energy: 595.66(4) keVNuclide mass:195.9232379 u (calculated nuclear mass without electrons)Mass excess:-31.13891 MeVMass defect:1.6654017 u (per nucleus)Nuclear binding energy:1551.31169114 MeV (per nucleus)
7.91485557 MeV (average binding energy per nucleon)Half-life:9.6(1) hDecay constant λ:2.005634203009 × 10^-5 s^-1Specific activity α:6.193954709757 × 10⁺¹⁶ Bq g^-1
1674041.8134481 Ci g^-1Spin and parity:
(nuclear angular momentum)12-

Radioactive Decay

Half-life T_½ = 9.6(1) h (hours) respectively 3.4560 × 10⁴ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
Iso	¹⁹⁶Au	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
¹⁹⁶Au		6.1669(6) d	2-
^196m1Au	84.656(20) keV	8.1(2) s	5+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 117) and isobaric (same nucleon number A = 196) with Gold-196m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 117	Isobar A = 196
71	¹⁸⁸Lu
72	¹⁸⁹Hf
73	¹⁹⁰Ta
74	¹⁹¹W	¹⁹⁶W
75	¹⁹²Re	¹⁹⁶Re
76	¹⁹³Os	¹⁹⁶Os
77	¹⁹⁴Ir	¹⁹⁶Ir
78	¹⁹⁵Pt	¹⁹⁶Pt
79	¹⁹⁶Au	¹⁹⁶Au
80	¹⁹⁷Hg	¹⁹⁶Hg
81	¹⁹⁸Tl	¹⁹⁶Tl
82	¹⁹⁹Pb	¹⁹⁶Pb
83	²⁰⁰Bi	¹⁹⁶Bi
84	²⁰¹Po	¹⁹⁶Po
85	²⁰²At	¹⁹⁶At
86	²⁰³Rn	¹⁹⁶Rn
87	²⁰⁴Fr
88	²⁰⁵Ra
89	²⁰⁶Ac
90	²⁰⁷Th