Sulfur-29

Properties and data of the isotope ²⁹S.

Contents

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

General data

Name of the isotope:Sulfur-29; S-29Symbol:²⁹S or 2916SMass number A:29 (= number of nucleons)Atomic number Z:16 (= number of protons)Neutrons N:13Isotopic mass:28.99661(5) u (atomic weight of Sulfur-29)Nuclide mass:28.9878328 u (calculated nuclear mass without electrons)Mass excess:-3.15776 MeVMass defect:0.24123442 u (per nucleus)Nuclear binding energy:224.70841482 MeV (per nucleus)
7.74856603 MeV (average binding energy per nucleon)Separation energy:S_N = 15.30(17) MeV (first neutron)
S_P = 3.30(5) MeV (first proton)Half-life:188(4) msDecay constant λ:3.6869530880848 s^-1Specific activity α:7.929768157294 × 10⁺²² Bq g^-1
2143180583052.6 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2+)Mirror nucleus:Aluminium-29Year of discovery:1964

Radioactive Decay

Half-life T_½ = 188(4) ms respectively 1.88 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	²⁹P	53(5) %	13.79550 MeV
ε, p	²⁸Si	47(5) %	11.044 MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 13) and isobaric (same nucleon number A = 29) with Sulfur-29. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 13	Isobar A = 29
5	¹⁸B
6	¹⁹C
7	²⁰N
8	²¹O
9	²²F	²⁹F
10	²³Ne	²⁹Ne
11	²⁴Na	²⁹Na
12	²⁵Mg	²⁹Mg
13	²⁶Al	²⁹Al
14	²⁷Si	²⁹Si
15	²⁸P	²⁹P
16	²⁹S	²⁹S
17	³⁰Cl	²⁹Cl
18	³¹Ar
19	³²K