Conventional unit of nuclear quadrupole moments in SI units.

value = barn

barn returns the SI value of 1 barn (a common unit for nuclear electric quadrupole moments), in m².

It is defined as 1 barn = 10^-28 m² = 10^-24 cm².

• M. G. Holloway, C. P. Baker, How the barn was born, Physics Today 25(7), 9 (1972).

amu, angstrom, avogadro, bmagn, bohrrad, boltzm, clight, echarge, emass, eps0, evolt, faraday, gammae, gfree, hartree, hbar, molgas, mu0, nmagn, nmass, planck, pmass, rydberg