Aluminium-34

Properties and data of the isotope ³⁴Al.

Content

General data

Name of the isotope:Aluminium-34; Al-34Symbol:³⁴Al or 3413AlMass number A:34 (= number of nucleons)Atomic number Z:13 (= number of protons)Neutrons N:21Isotopic mass:33.996779(3) u (atomic weight of Aluminium-34)Nuclide mass:33.9896475 u (calculated nuclear mass without electrons)Mass excess:-3.00034 MeVMass defect:0.28690965200001 u (per nucleus)Nuclear binding energy:267.25461938 MeV (per nucleus)
7.86042998 MeV (average binding energy per nucleon)Separation energy:S_N = 2.574(8) MeV (first neutron)
S_P = 15.252(4) MeV (first proton)Half-life:56.3(5) msDecay constant λ:12.311672834102 s^-1Specific activity α:2.246746303891 × 10⁺²³ Bq g^-1
6072287307814.9 Ci g^-1Spin and parity:
(nuclear angular momentum)(4-)Magnetic dipole moment:μ(μ_N) = + 2.157(6)Nuclear g-factor:g_l = 0.53925Year of discovery:1977

Radioactive Decay

Half-life T_½ = 56.3(5) ms respectively 5.63 × 10^-2 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	³⁴Si	74(4) %	16.957(14) MeV
β^-, n	³³Si	26(4) %	9.443(3) MeV

Parent Nuclides

Direct parent isotope is: ³⁴Mg.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 21) and isobaric (same nucleon number A = 34) with Aluminium-34. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 21	Isobar A = 34
9	³⁰F
10	³¹Ne	³⁴Ne
11	³²Na	³⁴Na
12	³³Mg	³⁴Mg
13	³⁴Al	³⁴Al
14	³⁵Si	³⁴Si
15	³⁶P	³⁴P
16	³⁷S	³⁴S
17	³⁸Cl	³⁴Cl
18	³⁹Ar	³⁴Ar
19	⁴⁰K	³⁴K
20	⁴¹Ca	³⁴Ca
21	⁴²Sc
22	⁴³Ti
23	⁴⁴V
24	⁴⁵Cr
25	⁴⁶Mn
26	⁴⁷Fe
27	⁴⁸Co
28	⁴⁹Ni