Cobalt-49

Properties and data of the isotope ⁴⁹Co.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Cobalt isotopes (and general data sources).

General data

Name of the isotope:Cobalt-49; Co-49Symbol:⁴⁹Co or 4927CoMass number A:49 (= number of nucleons)Atomic number Z:27 (= number of protons)Neutrons N:22Nucleon pairing (Z - N):odd - evenNuclear ratio (N/Z ratio):0.81481481481481 (= neutron-proton ratio)Neutron excess (N-Z):-5Isotopic mass:48.98972(28) u (atomic weight of Cobalt-49)Nuclide mass:48.9749087 u (calculated nuclear mass without electrons)Mass excess:-9.57576 MeVMass defect:0.412184016 u (per nucleus)Nuclear binding energy:383.9469378 MeV (per nucleus)
7.83565179 MeV (average binding energy per nucleon)Half-life:< 35 nsDecay constant λ:19804205.158856 s^-1Specific activity α:2.484660689285 × 10⁺²⁹ Bq g^-1
6.715299160231 × 10⁺¹⁸ Ci g^-1Spin and parity:
(nuclear angular momentum)7/2-~Mirror nucleus:Titanium-49

Radioactive Decay

Half-life T_½ = < 35 ns respectively 3.5 × 10^-8 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
p und β⁺

Parent Nuclides

Direct parent isotope is: ⁴⁹Ni.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 22) and isobaric (same nucleon number A = 49) with Cobalt-49. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 22	Isobar A = 49
9	³¹F
10	³²Ne
11	³³Na
12	³⁴Mg
13	³⁵Al
14	³⁶Si
15	³⁷P
16	³⁸S	⁴⁹S
17	³⁹Cl	⁴⁹Cl
18	⁴⁰Ar	⁴⁹Ar
19	⁴¹K	⁴⁹K
20	⁴²Ca	⁴⁹Ca
21	⁴³Sc	⁴⁹Sc
22	⁴⁴Ti	⁴⁹Ti
23	⁴⁵V	⁴⁹V
24	⁴⁶Cr	⁴⁹Cr
25	⁴⁷Mn	⁴⁹Mn
26	⁴⁸Fe	⁴⁹Fe
27	⁴⁹Co	⁴⁹Co
28	⁵⁰Ni	⁴⁹Ni