Arsenic-83

Properties and data of the isotope ⁸³As.

Content

General data

Name of the isotope:Arsenic-83; As-83Symbol:⁸³As or 8333AsMass number A:83 (= number of nucleons)Atomic number Z:33 (= number of protons)Neutrons N:50Isotopic mass:82.925207(3) u (atomic weight of Arsenic-83)Nuclide mass:82.9071045 u (calculated nuclear mass without electrons)Mass excess:-69.66923 MeVMass defect:0.76626485599999 u (per nucleus)Nuclear binding energy:713.77111577 MeV (per nucleus)
8.599652 MeV (average binding energy per nucleon)Separation energy:S_N = 7.635(5) MeV (first neutron)
S_P = 11.543(4) MeV (first proton)Half-life:13.4(3) sDecay constant λ:0.051727401534324 s^-1Specific activity α:3.79889876046 × 10⁺²⁰ Bq g^-1
10267293947.205 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2-)Year of discovery:1968

Radioactive Decay

Half-life T_½ = 13.4(3) s respectively 1.34 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁸³Se	100 %	5.671(4) MeV

Parent Nuclides

Direct parent isotope is: ⁸³Ge.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 50) and isobaric (same nucleon number A = 83) with Arsenic-83. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 50	Isobar A = 83
28	⁷⁸Ni
29	⁷⁹Cu
30	⁸⁰Zn	⁸³Zn
31	⁸¹Ga	⁸³Ga
32	⁸²Ge	⁸³Ge
33	⁸³As	⁸³As
34	⁸⁴Se	⁸³Se
35	⁸⁵Br	⁸³Br
36	⁸⁶Kr	⁸³Kr
37	⁸⁷Rb	⁸³Rb
38	⁸⁸Sr	⁸³Sr
39	⁸⁹Y	⁸³Y
40	⁹⁰Zr	⁸³Zr
41	⁹¹Nb	⁸³Nb
42	⁹²Mo	⁸³Mo
43	⁹³Tc
44	⁹⁴Ru
45	⁹⁵Rh
46	⁹⁶Pd
47	⁹⁷Ag
48	⁹⁸Cd
49	⁹⁹In
50	¹⁰⁰Sn