Boron-16

Properties and data of the isotope ¹⁶B.

Content

General data

Name of the isotope:Boron-16; B-16Symbol:¹⁶B or 165BMass number A:16 (= number of nucleons)Atomic number Z:5 (= number of protons)Neutrons N:11Isotopic mass:16.039842(26) u (atomic weight of Boron-16)Nuclide mass:16.0370991 u (calculated nuclear mass without electrons)Mass excess:37.11258 MeVMass defect:0.094597235999998 u (per nucleus)Nuclear binding energy:88.11675775 MeV (per nucleus)
5.50729736 MeV (average binding energy per nucleon)Separation energy:
S_P = 20.00(17) MeV (first proton)Half-life:> 4.6 × 10^-21 sDecay constant λ:1.506841696869 × 10⁺²⁰ s^-1Specific activity α:5.671508095108 × 10⁺⁴² Bq g^-1
1.532840025705 × 10⁺³² Ci g^-1Spin and parity:
(nuclear angular momentum)0-Year of discovery:2000

Radioactive Decay

Half-life T_½ = > 4.6 × 10^-21 s respectively 4.6 × 10^-21 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
n	¹⁵B	100 %

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 11) and isobaric (same nucleon number A = 16) with Boron-16. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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