Arsenic-76m

Properties and data of the isotope ^76mAs.

Contents

See also: List of individual Arsenic isotopes (and general data sources).

General data

Name of the isotope:Arsenic-76m; As-76mSymbol:^76mAs or 76m33AsMass number A:76 (= number of nucleons)Atomic number Z:33 (= number of protons)Neutrons N:43Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3030303030303 (= neutron-proton ratio)Neutron excess (N-Z):10Excitation energy:44.425(1) keVIsotopic mass:75.922392(1) u (atomic weight of Arsenic-76m)Nuclide mass:75.9042895 u (calculated nuclear mass without electrons)Mass excess:-72.29139 MeVMass defect:0.708425444 u (per nucleus)Nuclear binding energy:659.89405053 MeV (per nucleus)
8.68281645 MeV (average binding energy per nucleon)Half-life:1.84(6) μsDecay constant λ:376710.42421736 s^-1Specific activity α:3.024804317391 × 10⁺²⁷ Bq g^-1
8.175146803760 × 10⁺¹⁶ Ci g^-1Spin and parity:
(nuclear angular momentum)(1)+Magnetic dipole moment:μ(μ_N) = + 0.559(5)Nuclear g-factor:g_l = 0.559

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
⁷⁶As		26.24(9) h	2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 43) and isobaric (same nucleon number A = 76) with Arsenic-76m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 43	Isobar A = 76
22	⁶⁵Ti
23	⁶⁶V
24	⁶⁷Cr
25	⁶⁸Mn
26	⁶⁹Fe
27	⁷⁰Co	⁷⁶Co
28	⁷¹Ni	⁷⁶Ni
29	⁷²Cu	⁷⁶Cu
30	⁷³Zn	⁷⁶Zn
31	⁷⁴Ga	⁷⁶Ga
32	⁷⁵Ge	⁷⁶Ge
33	⁷⁶As	⁷⁶As
34	⁷⁷Se	⁷⁶Se
35	⁷⁸Br	⁷⁶Br
36	⁷⁹Kr	⁷⁶Kr
37	⁸⁰Rb	⁷⁶Rb
38	⁸¹Sr	⁷⁶Sr
39	⁸²Y	⁷⁶Y
40	⁸³Zr
41	⁸⁴Nb
42	⁸⁵Mo
43	⁸⁶Tc
44	⁸⁷Ru