Chlorine-46

Properties and data of the isotope ⁴⁶Cl.

Content

General data

Name of the isotope:Chlorine-46; Cl-46Symbol:⁴⁶Cl or 4617ClMass number A:46 (= number of nucleons)Atomic number Z:17 (= number of protons)Neutrons N:29Isotopic mass:45.98512(22) u (atomic weight of Chlorine-46)Nuclide mass:45.9757943 u (calculated nuclear mass without electrons)Mass excess:-13.86063 MeVMass defect:0.399188108 u (per nucleus)Nuclear binding energy:371.84132747 MeV (per nucleus)
8.08350712 MeV (average binding energy per nucleon)Separation energy:S_N = 3.67(25) MeV (first neutron)
S_P = 17.16(106) MeV (first proton)Half-life:232(2) msDecay constant λ:2.9877033644825 s^-1Specific activity α:3.998304557471 × 10⁺²² Bq g^-1
1080622853370.6 Ci g^-1Spin and parity:
(nuclear angular momentum)(2-)Year of discovery:1989

Radioactive Decay

Half-life T_½ = 232(2) ms respectively 2.32 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁴⁶Ar	40(9) %	15.9192 MeV
β^-, n	⁴⁵Ar	60(9) %	7.8891 MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 29) and isobaric (same nucleon number A = 46) with Chlorine-46. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 29	Isobar A = 46
13	⁴²Al
14	⁴³Si
15	⁴⁴P	⁴⁶P
16	⁴⁵S	⁴⁶S
17	⁴⁶Cl	⁴⁶Cl
18	⁴⁷Ar	⁴⁶Ar
19	⁴⁸K	⁴⁶K
20	⁴⁹Ca	⁴⁶Ca
21	⁵⁰Sc	⁴⁶Sc
22	⁵¹Ti	⁴⁶Ti
23	⁵²V	⁴⁶V
24	⁵³Cr	⁴⁶Cr
25	⁵⁴Mn	⁴⁶Mn
26	⁵⁵Fe	⁴⁶Fe
27	⁵⁶Co	⁴⁶Co
28	⁵⁷Ni
29	⁵⁸Cu
30	⁵⁹Zn
31	⁶⁰Ga
32	⁶¹Ge
33	⁶²As
34	⁶³Se