Gold-193m2

Properties and data of the isotope ¹⁹³Au.

Content

General data

Name of the isotope:Gold-193m2; Au-193m2Symbol:¹⁹³Au or 19379AuMass number A:193 (= number of nucleons)Atomic number Z:79 (= number of protons)Neutrons N:114Isotopic mass:192.964138(9) u (atomic weight of Gold-193m2)
Excitation energy: 2486.7(6) keVNuclide mass:192.9208049 u (calculated nuclear mass without electrons)Mass excess:-33.40524 MeVMass defect:1.641839952 u (per nucleus)Nuclear binding energy:1529.36406425 MeV (per nucleus)
7.92416614 MeV (average binding energy per nucleon)Half-life:150(50) nsDecay constant λ:4620981.203733 s^-1Specific activity α:1.449385402083 × 10⁺²⁸ Bq g^-1
3.917257843468 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)(31/2+)

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
¹⁹³Au		17.65(15) h	3/2+
^193m1Au	290.20(4) keV	3.9(3) s	11/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 114) and isobaric (same nucleon number A = 193) with Gold-193m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 114	Isobar A = 193
70	¹⁸⁴Yb
71	¹⁸⁵Lu
72	¹⁸⁶Hf
73	¹⁸⁷Ta	¹⁹³Ta
74	¹⁸⁸W	¹⁹³W
75	¹⁸⁹Re	¹⁹³Re
76	¹⁹⁰Os	¹⁹³Os
77	¹⁹¹Ir	¹⁹³Ir
78	¹⁹²Pt	¹⁹³Pt
79	¹⁹³Au	¹⁹³Au
80	¹⁹⁴Hg	¹⁹³Hg
81	¹⁹⁵Tl	¹⁹³Tl
82	¹⁹⁶Pb	¹⁹³Pb
83	¹⁹⁷Bi	¹⁹³Bi
84	¹⁹⁸Po	¹⁹³Po
85	¹⁹⁹At	¹⁹³At
86	²⁰⁰Rn	¹⁹³Rn
87	²⁰¹Fr
88	²⁰²Ra