Neutronics in Fusion

Nuclear Fusion Reactions

Deuterium–Tritium (D–T)

$2^{}\mathrm{H}{+}^3\mathrm{H}{⟶}^4\mathrm{H}\mathrm{e}+n$ Q = 17.6 MeV

• Alpha particle: 3.5 MeV
• Neutron: 14.1 MeV

Deuterium–Deuterium (D–D)

$2^{}\mathrm{H}{+}^2\mathrm{H}{⟶}^3\mathrm{H}\mathrm{e}+n$ Q = 3.27 MeV

$2^{}\mathrm{H}{+}^2\mathrm{H}{⟶}^3\mathrm{H}+p$ Q = 4.03 MeV

Deuterium–Helium‑3 (D–³He)

$2^{}\mathrm{H}{+}^3\mathrm{H}\mathrm{e}{⟶}^4\mathrm{H}\mathrm{e}+p$ Q = 18.3 MeV

Helium‑3–Helium‑3 (³He–³He)

$3^{}\mathrm{H}\mathrm{e}{+}^3\mathrm{H}\mathrm{e}{⟶}^4\mathrm{H}\mathrm{e}+2p$ Q = 12.86 MeV

Proton–Boron‑11 (p–¹¹B)

$p{+}^{11}\mathrm{B}⟶3{}^4\mathrm{H}\mathrm{e}$ Q = 8.68 MeV

Tritium–Tritium (T–T)

$3^{}\mathrm{H}{+}^3\mathrm{H}{⟶}^4\mathrm{H}\mathrm{e}+2n$ Q = 11.3 MeV

Proton–Proton Chain (stellar fusion)

$4p{⟶}^4\mathrm{H}\mathrm{e}+2e^{+}+2{\nu }_e$ Q = 26.7 MeV

Carbon–Nitrogen–Oxygen (CNO) Cycle

$4p{+}^{12}\mathrm{C}{⟶}^4\mathrm{H}\mathrm{e}{+}^{12}\mathrm{C}+2e^{+}+2{\nu }_e$ Q = 25.0 MeV