Aluminium-30

Properties and data of the isotope ³⁰Al.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

Literature

Aluminium-30 is a radioisotope of the chemical element aluminium, which has 17 neutrons in its atomic nucleus in addition to the element-specific 13 protons; the sum of the number of these atomic nucleus building blocks results in a mass number of 30.

The radioactive isotope was first described in 1961 [1]; according to this, ³⁰Al was observed during the irradiation of a Si template in a cyclotron with deuterons (hydrogen-2 nuclei) with an energy of 8.8 MeV; the nuclide was formed by a charge exchange reaction of silicon-30:

³⁰Si(n,p)³⁰Al.

The very short-lived, neutron-rich, unstable and thus radioactive nuclide has no practical significance; the study of ³⁰Al serves exclusively academic purposes.

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

General data

Name of the isotope:Aluminium-30; Al-30Symbol:³⁰Al or 3013AlMass number A:30 (= number of nucleons)Atomic number Z:13 (= number of protons)Neutrons N:17Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3076923076923 (= neutron-proton ratio)Neutron excess (N-Z):4Isotopic mass:29.9829692(21) u (atomic weight of Aluminium-30)Nuclide mass:29.9758377 u (calculated nuclear mass without electrons)Mass excess:-15.86409 MeVMass defect:0.266059788 u (per nucleus)Nuclear binding energy:247.83309616 MeV (per nucleus)
8.26110321 MeV (average binding energy per nucleon)Separation energy:S_N = 5.7277(20) MeV (first neutron)
S_P = 12.5407(20) MeV (first proton)Half-life:3.62(6) sDecay constant λ:0.19147712170164 s^-1Specific activity α:3.976214477043 × 10⁺²¹ Bq g^-1
107465256136.3 Ci g^-1Spin and parity:
(nuclear angular momentum)3+Magnetic dipole moment:μ(μ_N) = 3.010(7)Quadrupole moment Q:+0.121(8) barn (100 fm²)Nuclear g-factor:g_l = 1.0033333333333Mirror nucleus:Chlorine-30Year of discovery:1961

Radioactive Decay

Half-life T_½ = 3.62(6) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	³⁰Si	100 %	8.5688(19) MeV	2.23523(2) MeV [65(1) %] 1.26313(3) MeV [40.6(14 %]

Parent Nuclides

Direct parent isotope is: ³⁰Mg.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 17) and isobaric (same nucleon number A = 30) with Aluminium-30. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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