Arsenic-75

Properties and data of the isotope ⁷⁵As.

Content

General data

Name of the isotope:Arsenic-75; As-75Symbol:⁷⁵As or 7533AsMass number A:75 (= number of nucleons)Atomic number Z:33 (= number of protons)Neutrons N:42Isotopic mass:74.921595(6) u (atomic weight of Arsenic-75)Nuclide mass:74.9034925 u (calculated nuclear mass without electrons)Mass excess:-73.03379 MeVMass defect:0.700557528 u (per nucleus)Nuclear binding energy:652.56513399 MeV (per nucleus)
8.70086845 MeV (average binding energy per nucleon)Separation energy:S_N = 10.2455(19) MeV (first neutron)
S_P = 6.9007(9) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)3/2-Magnetic dipole moment:μ(μ_N) = +1.4383(3)Charge radius:4.0968(20) femtometer fmYear of discovery:1920

Parent Nuclides

Direct parent isotopes are: ⁷⁵Se, ⁷⁵Ge.

Occurrence

Comparison of the natural Arsenic isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	Quantity	Half-life	Spin
Arsenic Isotopic mixture	74.921595 u	100 %
Isotope ⁷⁵As	74.921595(6) u	100 %	stable	3/2-

NMR data

Nuclear magnetic properties of the NMR active Nuclide ⁷⁵As

Isotope:⁷⁵As-NMRQuantity:100 %Spin:3/2-Nuclearmagnetic moment
μ/μ_N:+1.4383(3)Gyromagnetic ratio γ:4.5961 · 10⁷ rad T^-1 s^-1Nuclear g-factor:g_l = 0.95886666666667Quadrupole moment Q:+ 0.311(2) barn (100 fm²)Resonance frequency:v₀ = 7.3150 at 1 TRelative Sensitivity:0.02536 (H₀ = const.)
0.8590 (v₀ = const.)
[related to ¹H = 1.000]

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
^75mAs	303.9243(8) keV	17.62(23) ms	9/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 42) and isobaric (same nucleon number A = 75) with Arsenic-75. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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