Chlorine-34

Properties and data of the isotope ³⁴Cl.

Content

General data

Name of the isotope:Chlorine-34; Cl-34Symbol:³⁴Cl or 3417ClMass number A:34 (= number of nucleons)Atomic number Z:17 (= number of protons)Neutrons N:17Isotopic mass:33.97376249(5) u (atomic weight of Chlorine-34)Nuclide mass:33.9644368 u (calculated nuclear mass without electrons)Mass excess:-24.44008 MeVMass defect:0.30656662600001 u (per nucleus)Nuclear binding energy:285.56497272 MeV (per nucleus)
8.39896979 MeV (average binding energy per nucleon)Separation energy:S_N = 11.5081(4) MeV (first neutron)
S_P = 5.14320(5) MeV (first proton)Half-life:1.5266(4) sDecay constant λ:0.45404636483686 s^-1Specific activity α:8.285852018150 × 10⁺²¹ Bq g^-1
223941946436.51 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1934

Radioactive Decay

Half-life T_½ = 1.5266(4) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	³⁴S	100 %	5.49163 MeV

Parent Nuclides

Direct parent isotopes are: ³⁴Ar, ³⁵K.

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
^34mCl	146.36(3) keV	31.99(3) min	3+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 17) and isobaric (same nucleon number A = 34) with Chlorine-34. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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