Electric and magnetic hyperfinestructure investigations in the 5s 25p 3 and 5s 25p 26s Configurations of121, 123Sb

Abstract

Optical hyperfinestructure investigations in several spectral lines were carried out in the Sb-I spectrum from which for the first time accurate values of the hfs-splitting constants A and B of the ground configuration 5p 3 and also for five of the eight levels of the first excited configuration 5p 2 6s were obtained. With these parameters the influence of core polarization effects is calculated to be a c = -6.6(4)mK, (equivalent to a magnetic field of -283 (20) (10) inK, and a value 6(r2) 121' 123 =0.12(4) fm 2 for the change in the mean square nuclear charge radius between 121Sb and ~ 23Sb which is about 50 percent of the prediction of the unified nuclear model.

The nuclear electric quadrupole moment of antimony from the molecular method

“…1͒ obtained by the atomic method that are −360͑40͒ and −490͑50͒. 20 The most recent NQMs, determined by Svane 21 using solid state EFG calculations, are −669 and −853 mb. Actually, Svane's results 21 are also far away from our results but exhibit the same ratio q͑ 123 Sb͒ / q͑ 121 Sb͒, indicating that the two different experimental sources of NQCC are in agreement and the error is due to the theoretical treatment.…”

Fine, hyperfine and Zeeman structures of levels of 123Sb I

“…A spectroscopy team from Berlin extended previous investigations using pressure-scanned Fabry-Pérot interferometers [7,9] and some years later, recurring to Fourier-transform spectrometer, the wavelengths of 617 lines have been measured and the hyperfinestructure splitting factors of 77% of these lines were determined by Hassini et al [8]. Table 8 contains values of fitted hfs parameters with regard to magnetic factor A only.…”

“…Hyperfine structure splitting A and B constants for levels of the ground configuration of Sb I have been obtained in a number of experiments [3][4][5][6][7][8][9][10][11]. Numerous authors had, at the beginning of Sb I electronic structure studies, looked into the emission spectrum.…”

“…Most of the experimental studies were focused on the hfs of isotope 121, but only a few were dedicated to isotope 123 [6,7]. In addition, the experimental values for 123 Sb are inconsistent (see Ref.…”

Ratio of the electric quadrupole moments of122,124Sb

“…The quadrupole interaction frequency of 121'123Sb in Sb has been determined in a nuclear quadrupole resonance experiment by Hewitt and Williams [1]. Since the quadrupole moments of 121,12aSb have been measured optically by Buchholz et al [2], the EFG of Sb in Sb metal is calibrated. Therefore first NO experiments were performed with 122'124Sb in an antimony single crystal.…”