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.
amu, avogadro, bmagn, bohrrad, boltzm, clight, echarge, emass, faraday, gfree, hartree, molgas, nmagn, nmass, planck, pmass, rydberg