Linked from

The 19 pages that link to Helium-4, each with the reason it gives.

• Big Bang nucleosynthesisBroader topic: Its predicted primordial mass fraction provides a robust test of early-universe physics.

• Atomic nucleusBroader topic: Its tightly bound nucleus is a prominent example of nuclear stability.

• Alpha particleBroader topic: An alpha particle is precisely the nucleus of this isotope.

• SuperfluidityBroader topic: Its superfluid phase established the classic connection between bosons and superfluidity.

• Bose–Einstein statisticsBroader topic: Its low-temperature liquid undergoes a transition to a superfluid state.

• HeliumBroader topic: Nearly all naturally occurring helium is this isotope.

• Proton–proton chainBroader topic: The chain’s net reaction builds helium-4 from four protons.

• BosonBroader topic: A helium-4 atom has integer total spin and can form a condensate.

• Zero-point energyBroader topic: Its atoms remain mobile in liquid helium because quantum ground-state motion is substantial.

• Triple-alpha processRelated: Three helium-4 nuclei supply the particles that ultimately assemble into carbon-12.

• Spin–statistics theoremBroader topic: At low temperatures, helium-4 atoms exhibit bosonic superfluid behavior.

• Helium-3Compared with: Its extra neutron makes helium-4 a boson, giving liquid helium different low-temperature behavior.

• Quantum Monte CarloBroader topic: Path integral Monte Carlo captures its quantum statistics and thermodynamic behavior.

• Nuclear magic numberBroader topic: Its doubly closed proton and neutron shells make it an exceptionally tightly bound light nucleus.

• Deuterium–tritium fusionBroader topic: This is the charged product nucleus that carries 3.5 megaelectronvolts of reaction energy.

• Helium burningBroader topic: Helium-4 nuclei are the fuel consumed in the triple-alpha process.

• Liquid heliumBroader topic: Its atoms form the familiar superfluid phase of liquid helium.

• Helium atomBroader topic: It is by far the most abundant helium isotope and the usual helium nucleus.

• Solid hydrogenRelated: Like solid hydrogen, solid helium is strongly influenced by quantum motion, but helium resists freezing at low pressure.