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Chlorine-38

Properties and data of the isotope 38Cl.


Content

See also: list of Chlorine isotopes.

 

General data

Name of the isotope:Chlorine-38; Cl-38Symbol:38Cl or 3817ClMass number A:38 (= number of nucleons)Atomic number Z:17 (= number of protons)Neutrons N:21Isotopic mass:37.96801041(11) u (atomic weight of Chlorine-38)Nuclide mass:37.9586847 u (calculated nuclear mass without electrons)Mass excess:-29.79811 MeVMass defect:0.34697837 u (per nucleus)Nuclear binding energy:323.20826978 MeV (per nucleus)
8.50548078 MeV (average binding energy per nucleon)
Separation energy:SN = 6.10788(8) MeV (first neutron)
SP = 10.19066(21) MeV (first proton)
Half-life:37.230(14) minDecay constant λ:0.00031029957048972 s-1Specific activity α:5.050453303424 × 10+18 Bq g-1
136498737.93039 Ci g-1
Spin and parity:
(nuclear angular momentum)
2-Magnetic dipole moment:μ(μN) = 2.05(2)Nuclear g-factor:gl = 1.025Mirror nucleus:Scandium-38Year of discovery:1940

 

Radioactive Decay

Half-life T½ = 37.230(14) min (minutes) respectively 2.2338 × 103 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
β-38Ar100 %4.91671(22) MeV

 

Parent Nuclides

Direct parent isotope is: 38S.

 

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear IsomerExcitation EnergyHalf-lifeSpin
38mCl671.365(8) keV715(3) ms5-

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 21) and isobaric (same nucleon number A = 38) with Chlorine-38. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 21Isobar A = 38
930F
1031Ne
1132Na38Na
1233Mg38Mg
1334Al38Al
1435Si38Si
1536P38P
1637S38S
1738Cl38Cl
1839Ar38Ar
1940K38K
2041Ca38Ca
2142Sc38Sc
2243Ti38Ti
2344V
2445Cr
2546Mn
2647Fe
2748Co
2849Ni

 

External data and identifiers

Adopted Levels, Gammas:NuDat 38Cl

 


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Last update: 2023-10-04


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