Sulfur-33

Properties and data of the isotope ³³S.

Content

General data

Name of the isotope:Sulfur-33; S-33Symbol:³³S or 3316SMass number A:33 (= number of nucleons)Atomic number Z:16 (= number of protons)Neutrons N:17Isotopic mass:32.971458910(9) u (atomic weight of Sulfur-33)Nuclide mass:32.9626817 u (calculated nuclear mass without electrons)Mass excess:-26.58585 MeVMass defect:0.301045174 u (per nucleus)Nuclear binding energy:280.42177331 MeV (per nucleus)
8.49762949 MeV (average binding energy per nucleon)Separation energy:S_N = 8.64164(0) MeV (first neutron)
S_P = 9.56995(4) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)3/2+Isobaric spin: 1/2Magnetic dipole moment:μ(μ_N) = +0.64325(2)Mirror nucleus:Chlorine-33Year of discovery:1926

Parent Nuclides

Direct parent isotopes are: ³³Cl, ³³P.

Occurrence

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

	Atomic Mass m_a	Quantity	Half-life	Spin
Sulfur Isotopic mixture	32.06 u	100 %
Isotope ³²S	31.972071174(9) u	94.9 % [94.41 - 95.29 %]	stable	0+
Isotope ³³S	32.971458910(9) u	0.7 % [0.729 - 0.797 %]	stable	3/2+
Isotope ³⁴S	33.9678670(3) u	4.3 % [3.96 - 4.77 %]	stable	0+
Isotope ³⁵S	34.96903232(4) u	[trace]	87.37(4) d	3/2+
Isotope ³⁶S	35.967081(2) u	0.01 % [0.0129 - 0.0187]	stable	0+

NMR data

Nuclear magnetic properties of the NMR active Nuclide ³³S

Isotope:³³S-NMRQuantity:0.7 % [0.729 - 0.797 %]Spin:3/2+Nuclearmagnetic moment
μ/μ_N:+0.64325(2)Gyromagnetic ratio γ:2.055 · 10⁷ rad T^-1 s^-1Nuclear g-factor:g_l = 0.42883333333333Quadrupole moment Q:- 0.0694(4) barn (100 fm²)Resonance frequency:v₀ = 3.2717 at 1 TRelative Sensitivity:0.00227 (H₀ = const.)
0.3842 (v₀ = const.)
[related to ¹H = 1.000]

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 17) and isobaric (same nucleon number A = 33) with Sulfur-33. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 17	Isobar A = 33
7	²⁴N
8	²⁵O
9	²⁶F
10	²⁷Ne	³³Ne
11	²⁸Na	³³Na
12	²⁹Mg	³³Mg
13	³⁰Al	³³Al
14	³¹Si	³³Si
15	³²P	³³P
16	³³S	³³S
17	³⁴Cl	³³Cl
18	³⁵Ar	³³Ar
19	³⁶K	³³K
20	³⁷Ca
21	³⁸Sc
22	³⁹Ti
23	⁴⁰V
24	⁴¹Cr
25	⁴²Mn