Die Hyperfeinstruktur in den 4f7 6s 6p-Termen des Eu I und die elektrischen Kernquadrupolmomente von Eu151 und Eu153

摘要: The hyperfine structure of the statesz10P11/2,z10P9/2,z10P7/2,z8P9/2,y8P9/2,y8P7/2,y8P5/2,z6P7/2,z6 6s P5/2 4f7 6p configuration EuI was investigated with a photoelectric recording Fabry Perot spectrometer using enriched isotopes Eu151 and Eu153, which have been excited in liquid air cooled hollow cathodes. From measurements values for nuclear quadrupole moments $$Q(Eu^{151} ) = (1.16 \pm 0.08) \cdot 10^{ - 24} cm^2 $$ and $$Q(Eu^{153} (2.92 0.20) $$ could be derived.