Chromium-43

Properties and data of the isotope ⁴³Cr.

Content

General data

Name of the isotope:Chromium-43; Cr-43Symbol:⁴³Cr or 4324CrMass number A:43 (= number of nucleons)Atomic number Z:24 (= number of protons)Neutrons N:19Isotopic mass:42.99788(43) u (atomic weight of Chromium-43)Nuclide mass:42.9847144 u (calculated nuclear mass without electrons)Mass excess:-1.97477 MeVMass defect:0.354554172 u (per nucleus)Nuclear binding energy:330.26508389 MeV (per nucleus)
7.68058335 MeV (average binding energy per nucleon)Separation energy:S_N = 16.77(56) MeV (first neutron)
S_P = 1.64(44) MeV (first proton)Half-life:21.2(7) msDecay constant λ:32.695621724526 s^-1Specific activity α:4.688039036388 × 10⁺²³ Bq g^-1
12670375774022 Ci g^-1Spin and parity:
(nuclear angular momentum)(3/2+)Mirror nucleus:Potassium-43Year of discovery:1992

Radioactive Decay

Half-life T_½ = 21.2(7) ms respectively 2.12 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy
EE β⁺	⁴³V		15.95(40) MeV
EE, p	⁴²Ti	79.3(30) %
EE, 2p	⁴¹Sc	11.6(10) %
EE, 3p	⁴⁰Ca	0.13 %

Parent Nuclides

Direct parent isotope is: ⁴⁴Mn.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 19) and isobaric (same nucleon number A = 43) with Chromium-43. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 19	Isobar A = 43
8	²⁷O
9	²⁸F
10	²⁹Ne
11	³⁰Na
12	³¹Mg
13	³²Al	⁴³Al
14	³³Si	⁴³Si
15	³⁴P	⁴³P
16	³⁵S	⁴³S
17	³⁶Cl	⁴³Cl
18	³⁷Ar	⁴³Ar
19	³⁸K	⁴³K
20	³⁹Ca	⁴³Ca
21	⁴⁰Sc	⁴³Sc
22	⁴¹Ti	⁴³Ti
23	⁴²V	⁴³V
24	⁴³Cr	⁴³Cr
25	⁴⁴Mn	⁴³Mn
26	⁴⁵Fe
27	⁴⁶Co