Hyperfine Structure ofBi209

Abstract

We have used the atomic-beam magnetic-resonance technique to improve and extend the measurements of Title and Smith on the hyperfine structure of the (6p ) $3/2 ground state of Bi (I= 2 ) . We measured the three zero-field hyperfine intervals and computed the octupole interaction constant. Our experimental results are P~(&= 5 &= 6) = 2884.666(2), &2(&=4 -+=5) =2171. 419(2), and v3(F =3-&=4)=1584.502(2) MHz. From these values, we obtain for the hyperfine-interaction constants, corrected for the pseudo-octupole interactions due to perturbation by neighboring fine-structure levels A = -446.937 (1), B= -305.067(2), and C = 0.0183(1) MHz. The assigned errors include only the experimental errors in the measurement of the three hyperfine intervals, and no estimate of the errors in the theoretical corrections has been made. We have also corrected the data of Lurio and Landman for the (6p ) P3~2 meta-3 2 stable state of bismuth for these octupolelike interactions and have deduced a fairly consistent value for the one-electron octupole-interaction constant. From the average value of the octupole-interaction constant c3~2--0.0206 MHz we find that the nuclear magnetic octupole moment is 0.0086@&b. This value is compared with the prediction of the shell model.

The rotational spectrum of BiO radical in its X1 2Π1/2 and X2 2Π3/2 states

“…The relative magnitudes of the hyperfine constants are consistent with those derived from atomic values. In particular, d + c/3 is much larger than a and b F is large and negative as has been predicted by relativistic calculations [14,13] and which also has been determined experimentally for Bi atom [5,6]. Core polarization and relativistic effects contributing to b F cannot be separately determined by this experiment.…”

“…The constant eQq 1 10 may be compared with the value of À21.01 MHz for BiN [27]. Although the ground state for Bi is [(Xe)4f 14 5d 10 6s 2 6p 3 ] 4 S 3/2 , its quadrupole coupling is À305.067(2) MHz [6].…”

“…The hyperfine structure of Bi, Bi + , and Bi 2+ have been investigated and a number of theoretical treatments have been reported [5][6][7]. The BiO hyperfine constants determined by this study of the rotational spectrum will provide additional criteria for judging the quality of relativistic ab initio calculations for the molecule.…”

Year-2008 nuclear quadrupole moments

“…In Figure 2 we use the present Q values to fit the experimental b/Q for the 4 S 3=2 ground states of the atoms N [107], Sb [108] and Bi [109] to a Z n behaviour. The fit yields n ¼ 6:3ð5Þ.…”

Transport and Selectivities of Amino Acids on Periderm and Cuticular Membranes

“…All nonvolatile compounds reaching the plant surface from the atmosphere must penetrate the cuticle before entering the plant (5). Since plant cuticles are mainly lipid materials, they are likely to sorb and accumulate lipophilic compounds.…”