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Chlorine-37

Properties and data of the isotope 37Cl.


Content

See also: list of Chlorine isotopes.

 

General data

Name of the isotope:Chlorine-37; Cl-37Symbol:37Cl or 3717ClMass number A:37 (= number of nucleons)Atomic number Z:17 (= number of protons)Neutrons N:20Isotopic mass:36.9659026(4) u (atomic weight of Chlorine-37)Nuclide mass:36.9565769 u (calculated nuclear mass without electrons)Mass excess:-31.76152 MeVMass defect:0.340421264 u (per nucleus)Nuclear binding energy:317.10036489 MeV (per nucleus)
8.57028013 MeV (average binding energy per nucleon)
Separation energy:SN = 10.31085(6) MeV (first neutron)
SP = 8.38638(19) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
3/2+Magnetic dipole moment:μ(μN) = +0.68400(1)Charge radius:3.3840(170) femtometer fmMirror nucleus:Calcium-37Year of discovery:1919

 

Parent Nuclides

Direct parent isotopes are: 37Ar, 37S.

 

Occurrence

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

 

Atomic Mass maQuantityHalf-lifeSpin
Chlorine
Isotopic mixture
35.45 u100 %
Isotope 36Cl35.96830682(4) u
[trace]
3.013(15) × 105 a2+
Isotope 37Cl36.9659026(4) u24.2 %
[23.9 - 24.5 %]
stable3/2+
Isotope 35Cl34.9688527(3) u75.80(17) %
[75.5 - 76.1 %]
stable3/2+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 37Cl

Isotope:37Cl-NMRQuantity:24.2 % [23.9 - 24.5 %]Spin:3/2+Nuclearmagnetic moment
μ/μN:
+0.68400(1)Gyromagnetic ratio γ:2.1842 · 107 rad T-1 s-1Nuclear g-factor:gl = 0.456Quadrupole moment Q:- 0.06393 barn (100 fm2)Resonance frequency:v0 = 3.4765 at 1 TRelative Sensitivity:0.00272 (H0 = const.)
0.4083 (v0 = const.)
[related to 1H = 1.000]

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 20) and isobaric (same nucleon number A = 37) with Chlorine-37. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 20Isobar A = 37
828O
929F
1030Ne
1131Na37Na
1232Mg37Mg
1333Al37Al
1434Si37Si
1535P37P
1636S37S
1737Cl37Cl
1838Ar37Ar
1939K37K
2040Ca37Ca
2141Sc37Sc
2242Ti
2343V
2444Cr
2545Mn
2646Fe
2747Co
2848Ni

 

External data and identifiers

Adopted Levels, Gammas:NuDat 37Cl

 


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Last update: 2023-10-04


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