Hyperfeinstrukturanomalie und Kernquadrupolwechselwirkungskonstanten des angeregten 3d ⁹4s 4p ⁴ P _3/2-Terms im Cu I-Spektram von Cu⁶³ und Cu⁶⁵

Abstract

The hyperfine structure of the excited 3d ⁹ 4s 4p ⁴ P _3/2-term of the Cu I-spectrum was investigated in a level-crossing experiment using an atomic beam with copper in natural abundance as absorber. From the level-crossing signals the following relations for the hyperfine structure constants were deducedA(Cu⁶³)=2184.66 (17)g _J /1.75 Mc/sec,B(Cu⁶³)=−38.65 (11) g_J/1.75 Mc/sec,A(Cu⁶⁵)=2340.15 (19)g _J /1.75 Mc/sec,B(Cu⁶⁵)=−35.69 (17) g_J/1.75 Mc/sec. The ratio of the magnetic hyperfine structure constants of Cu⁶³ and Cu⁶⁵ was determined with high accuracy to beA(Cu⁶³)/A(Cu⁶⁵)=0.93355 (2). From this ratio a hyperfine structure anomaly₆₃Δ₆₅(⁴ P _3/2)=1.4·10⁻⁴(4) was deduced. The width of the zero field crossing yielded a lifetime τ=3.2 (3) · 10⁻⁷ sec for the excited⁴P_3/2-term.