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Arsenic-71

Properties and data of the isotope 71As.


Contents

See also: list of Arsenic isotopes.

 

General data

Name of the isotope:Arsenic-71; As-71Symbol:71As or 7133AsMass number A:71 (= number of nucleons)Atomic number Z:33 (= number of protons)Neutrons N:38Isotopic mass:70.927114(4) u (atomic weight of Arsenic-71)Nuclide mass:70.9090115 u (calculated nuclear mass without electrons)Mass excess:-67.89287 MeVMass defect:0.66037886399999 u (per nucleus)Nuclear binding energy:615.13894954 MeV (per nucleus)
8.66392887 MeV (average binding energy per nucleon)
Separation energy:SN = 11.62(50) MeV (first neutron)
SP = 4.62(4) MeV (first proton)
Half-life:65.30(7) hDecay constant λ:2.94855870580 × 10-6 s-1Specific activity α:2.536662265733 × 10+16 Bq g-1
685584.39614411 Ci g-1
Spin and parity:
(nuclear angular momentum)
5/2-Magnetic dipole moment:μ(μN) = +1.673(2)Quadrupole moment Q:- 0.021(6) barn (100 fm2)Nuclear g-factor:gl = 0.6692Year of discovery:1939

 

Radioactive Decay

Half-life T½ = 65.30(7) h (hours) respectively 2.35080 × 105 seconds s.

Decay
mode
DaughterProbabilityDecay energyγ energy
(intensity)
EC/β+71Ge100 %2.013(4) MeV

 

Parent Nuclides

Direct parent isotope is: 71Se.

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 38) and isobaric (same nucleon number A = 71) with Arsenic-71. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 38Isobar A = 71
2058Ca
2159Sc
2260Ti
2361V
2462Cr
2563Mn71Mn
2664Fe71Fe
2765Co71Co
2866Ni71Ni
2967Cu71Cu
3068Zn71Zn
3169Ga71Ga
3270Ge71Ge
3371As71As
3472Se71Se
3573Br71Br
3674Kr71Kr
3775Rb71Rb
3876Sr
3977Y
4078Zr

 

External data and identifiers

Adopted Levels, Gammas:NuDat 71As

 


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Last update: 2020-10-14


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