H. Kopfermann

DETERMINATION OF THE HYPERFINE STRUCTURE SPLITTING OF THE SCANDIUM GROUND STATES

The hyperfine structure splittings of the electronic ground states /sup 2/D/sub 3/2/ and /sup 2/D/sub 5/2/ of the stable isotope Sc/s up 45/ were measured by the atomic beam magnetic resonance method. From these splittings the magnetic dipole and electric quadrupole interaction constants are found to be a/ sub 3/3/ = (269.560 plus or minus 0.02) Mc/s b/sub 3/2/ =-(26.37 plus or minus 0.1) Mc/s a/sub 5/2/ = (109.034 plus or minus 0.01) Mc/s b/sub 5/2/ =-(37.31 plus or minus 0.1) Mc/s. The values of the electric quadrupole moment calculated from b/sub 3/2/ and b/sub 5/2/ differ by about 5% indicating that the configuration 3d 4s/sup 2/ of the ground states is perturbed by higher configurations. Averaging these two values we obtain for the quadrupole moment of Sc/sup 45/ Q(Sc/sup 45/) = -(0.22 plus or minus 0.01) x 10/sup -24/ cm/sup 2/. (auth)The hyperfine structure splittings of the electronic ground states2D3/2 and2D3/2 of the stable isotope Sc45 have been measured by the atomic beam magnetic resonance method. From these splittings the magnetic dipole and electric quadrupole interaction constants are found to bea3/2=(269,560±0,02) Mc/sb3/2=−(26,37±0,1) Mc/sa5/2=(109,034±0,01) Mc/sb5/2=−(37,31±0,1) Mc/s. The values of the electric quadrupole moment calculated fromb3/2 andb5/2 differ by about 5% indicating that the configuration 3d 4s2 of the ground states is perturbed by higher configurations.Averaging these two values we obtain for the quadrupole moment of Sc45Q(Sc45)=−(0,22±0,01) · 10−24 cm2.

sup 2

The magnetic dipole transitions between Zeeman terms of the hfs terms of the ground state were observed in the Ho165 I spectrum. The transitions observed are tabulated, and the hfs interaction constants are calculated. No magnetic octupole interaction was found. (J.S.R.)

D

ZusammenfassungThe hyperfinestructure transitions in the excited 62P3/2-state of Rb I have been measured with the double resonance method using isotopic enriched samples of Rb 85 and Rb 87. TheA(-factors andB-factors have been evalueted from the measured frequencies toA85=8,178 ± 0,009 Mc/sec,B85=8,199±0,040 Mc/sec,A87=27,707±0,015 Mc/sec andB87=4,000±0,039 Mc/sec.

sub 3

ZusammenfassungMit einer magnetischen Atomstrahlresonanzapparatur wurden in den beiden Grundzuständen2D3/2 und2D5/2 des Y89-Atoms Hochfrequenz-Übergänge zwischen den Zeeman-Komponenten verschiedener Hyperfeinstrukturterme (δF=1-Übergänge) bei Magnetfeldern zwischen 10 und 15 Gauss und Übergänge zwischen den Zeeman Komponenten eines einzelnen Hyperfeinstrukturterms (δF=0-Übergänge) bei Feldstärken zwischen 470 und 490 Gauss gemessen. Hieraus lieen sich die magnetischen Hfs-Aufspaltungsfaktoren („A-Faktoren“) der beiden Grundzustände wie folgt bestimmen:A (2D3/2)=−(57,217±0,015) MHzA (2D5/2)=−(28,749±0,030) MHz. Der Yttrium-Atomstrahl wurde mit einem Universaldetektor nachgewiesen.

2/ AND

With the help of the double resonance technique, the hyperfine structure of the /sup 8/Rb isotope in the excited 5 /sup 2/P/sub 3/2/ level of the rubidium spectra is given. The nuclear quadrupole moment was calculated to be 0.144 x 10/ sup -24/ cm/sup 2/ without regard to the Sternheimer correction and 0.120 x 10/ sup -24/ cm/sup 2/ considering the correction. (M.C.G.)

sup 2

AbstractUsing 4 mg of radiogenic Os187 the hyperfine structure of this isotope has been investigated with a recording Fabry-Perot interferometer. From the measurement of intensities and distances of the hyperfine-structure components in three fine-structure lines the spin and the magnetic moment of the Os187 nucleus have been determined to beI=1/2 andμI=+(0,0652±0,0011) n.m.In three fine-structure lines the isotopic shift has been measured and the relative isotopic shift of Os187 has been found to ben

sub 5

frac{{Delta v(Os^{192} - Os^{187} )}}{{Delta v(Os^{192} - Os^{190} )}} = 3,09 pm 0,03

sup 45

n.The two classifications of the fine-structure line λ 4261 Å have been verified by observing both transitions in Os187.