proton-proton chain Comparison Table

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proton-proton chain comparison table

Subject has reaction probability has reaction has definition

pep reaction once in 400 p-p reactions A reaction occurring in the proton-proton chain which occurs only once in 400 p-p reactions but produces far more energetic neutrinos (1.44 MeV as against 0.42 MeV).

PP I ¹H(p, β⁺v)²D(p, γ)³He(³He, 2p)⁴He A thermonuclear reaction in which hydrogen nuclei are transformed into helium nuclei producing 4 × 10^-5 ergs of energy. Although the neutrinos from this reaction are detectable, they have not been observed.

PP II ¹H(p, β⁺v)²D(p, γ)³He(⁴He, γ)⁷Be(β⁺v)⁷Li(p,α)⁴He A thermonuclear reaction in which hydrogen nuclei are transformed into helium nuclei. Although the neutrinos from this reaction are detectable, they have not been observed.

PP III once in 1000 times ¹H(p, β⁺v)²D(p, γ)³He(⁴He,γ)⁷Be(p,γ)⁸B (β⁺v)⁸Be → 2 ⁴He A thermonuclear reaction in which hydrogen nuclei are transformed into helium nuclei. Occurs once in 1000 times.

Subject	has reaction probability	has reaction	has definition
pep reaction	once in 400 p-p reactions		A reaction occurring in the proton-proton chain which occurs only once in 400 p-p reactions but produces far more energetic neutrinos (1.44 MeV as against 0.42 MeV).
PP I		¹H(p, β⁺v)²D(p, γ)³He(³He, 2p)⁴He	A thermonuclear reaction in which hydrogen nuclei are transformed into helium nuclei producing 4 × 10^-5 ergs of energy. Although the neutrinos from this reaction are detectable, they have not been observed.
PP II		¹H(p, β⁺v)²D(p, γ)³He(⁴He, γ)⁷Be(β⁺v)⁷Li(p,α)⁴He	A thermonuclear reaction in which hydrogen nuclei are transformed into helium nuclei. Although the neutrinos from this reaction are detectable, they have not been observed.
PP III	once in 1000 times	¹H(p, β⁺v)²D(p, γ)³He(⁴He,γ)⁷Be(p,γ)⁸B (β⁺v)⁸Be → 2 ⁴He	A thermonuclear reaction in which hydrogen nuclei are transformed into helium nuclei. Occurs once in 1000 times.

Next hydrogen burning: carbon cycle Up: hydrogen burning, pycnonuclear reaction