Arsenic-63

Properties and data of the isotope ⁶³As.

Contents

General data

Name of the isotope:Arsenic-63; As-63Symbol:⁶³As or 6333AsMass number A:63 (= number of nucleons)Atomic number Z:33 (= number of protons)Neutrons N:30Isotopic mass:62.96404(21) u (atomic weight of Arsenic-63)Nuclide mass:62.9459375 u (calculated nuclear mass without electrons)Mass excess:-33.49652 MeVMass defect:0.554133536 u (per nucleus)Nuclear binding energy:516.17206398 MeV (per nucleus)
8.19320736 MeV (average binding energy per nucleon)Half-life:43 nsDecay constant λ:16119701.873487 s^-1Specific activity α:1.565727666166 × 10⁺²⁹ Bq g^-1
4.231696395044 × 10⁺¹⁸ Ci g^-1Spin and parity:
(nuclear angular momentum)3/2-Mirror nucleus:Zinc-63

Radioactive Decay

Half-life T_½ = 43 ns respectively 4.3 × 10^-8 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
p	⁶²Ge	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 30) and isobaric (same nucleon number A = 63) with Arsenic-63. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 30	Isobar A = 63
13	⁴³Al
14	⁴⁴Si
15	⁴⁵P
16	⁴⁶S
17	⁴⁷Cl
18	⁴⁸Ar
19	⁴⁹K
20	⁵⁰Ca
21	⁵¹Sc
22	⁵²Ti	⁶³Ti
23	⁵³V	⁶³V
24	⁵⁴Cr	⁶³Cr
25	⁵⁵Mn	⁶³Mn
26	⁵⁶Fe	⁶³Fe
27	⁵⁷Co	⁶³Co
28	⁵⁸Ni	⁶³Ni
29	⁵⁹Cu	⁶³Cu
30	⁶⁰Zn	⁶³Zn
31	⁶¹Ga	⁶³Ga
32	⁶²Ge	⁶³Ge
33	⁶³As	⁶³As
34	⁶⁴Se	⁶³Se