Hyperfine spectrum of207Bi by absorption spectroscopy: Isotope shift systematics in heavy elements

Abstract

The hyperfine spectrum of 38-y 2~ in the 6p 3 $3/2-6p ( Po)7SZP1/2 3,067-~ resonance line was measured by absorption spectroscopy. The 2~176 isotope shift is 0.0999 (20) cm-L. The relative isotope shifts in bismuth are found to follow the general pattern of the even-neutron number isotopes for the isotones with Z = 80, 81, 82 and 87. The magnetic dipole and electric quadrupole hfs interaction constants for ~~ A(4P1/2) =0.1630 (3) cm-1 and B(4S3/2) = -0.016 (3) cm-1, were obtained, Except for the isotope shift, these more precise values are in agreement with our previous results.

Nuclear moments and charge radii of bismuth isotopes

“…A value for the 207 Bi I = 9 2 ground state moment of +4.0915(9)µ N is deduced. The value is consistent with, and improves upon, a previous optical measurement of +4.081(9)µ N [17]. The value for the spectroscopic quadrupole moment, −0.545(38) b, also improves upon that of the previous report, −0.58 (11) b [17].…”

Laser spectroscopy for nuclear structure physics

“…This formalism was originally introduced by Hull and Stroke who observed marked similarities in the relative isotopic shifts for isotones in Hg and Tl [383]. Later, such comparisons were extended above the Z=82 shell closure by Barboza-Flores [384], Kowalewska [155], Campbell [385] and Pearson [150]. It is remarkable that within the region near stability, an incredible reproduction of small scale structure such as odd-even staggering is reproduced within errors.…”

Pulsed laser resonance ionization mass spectrometry for elementally selective detection of lead and bismuth mixtures

“…For Bi, both hyperfine structure and isotope shifts contribute to the optical spectra. The hyperfine pattern will be ~250 mK wide for all cases (25)(26)(27)(28)(29)(30); the isotope shift, although unmeasured at present, can be expected to be similar to that of Pb (29). Of course, in both instances, the atom source conditions must be such that Doppler broadening is not extreme.…”