Evidence for Surface-Interaction Effects via a Nuclear Hyperfine-Interaction Experiment

Magnetic Hyperfine Rotation of aγ-Ray Angular Distribution Due to Target Tilting

“…Results similar to those presented here have been obtained elsewhere for ls O nuclei in the 2+ state 9 where an effect of opposite sign was observed, consistent with a negative value of the nuclear g factor. 10 It is apparent that the effect observed here may provide a means for determining the sign of g factors of short-lived nuclear states under favorable conditions.…”

“…2,3 In the process Fox et al 4 noticed a curious cycle pattern for clusters of levels belonging to octahedral-group (O) irreducible representations (IR's) that appeared in the splitting of each J manifold. A cycle of four sixfold, nearly degenerate clusters (A lf E, T x ), (7\, T 2 ), (A 2 , E, T 2 ), and (T 19 T 2 ) may be repeated several times in the upper limb until it abruptly splits and forms a similar cycle of eightfold clusters (£, T 19 T 2 ), (A 19 A 29 T 19 T 2 ) 9 and (E 9 T 19 T 2 ). A similar clustering was noticed earlier by Dorney and Watson 5 in their XY 4 model calculations.…”

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“…The first tilted-foil g-factor measurements (Hass et al 1977, Goldring et a1 1977 established an asymmetry using the scheme shown in Figure 17, where the fo il plane can be flipped from right to left of the beam axis. Thus if…”

“…In the nuclear experiments, we shall ignore the initial atomic align ment (Ag, Ai, A�, which are small) and assume only an orientation O� (which can be large). The orientation is generally defined (Hass et al 1977) as…”

“…The first tilted-foil measurements showing the applicability of this technique for measuring the signs of nuclear g-values were in 1 80 and 160 (Hass et al 1977, Goldring et all 1977. Since then, the more sensitive multifoil technique has been established (Dafni et al 1981, Broude et al 1981.…”