Hyperfine interactions in isolated ions

Triaxiality and?-softness in196Pt

“…In this model the time-integrated attenuation factors G2 (oo) and G4(oo) are described by the correlation (relaxation) constants 22(N) and Aa(N) and the nuclear lifetime v(N) for the state N by the relation Gk(oo)={1 + 2k (N) ~ (N)} -a with k = 2, 4. Although, according to some experimental evidence, the interaction is not fluctuating, as assumed in the theory of Abragam and Pound, but (quasi-) static with a broad spectrum of frequencies [53,54], it has been shown that the time integrated attenuation for nuclear levels mainly fed by cascades can be equally well described by the different models of deorientation [55]. Hence it is justified to parametrize the data with the simple expressions of the Abragam and Pound model.…”

Time-dependent Monte Carlo calculations of recoil-in-vacuumg-factor data for122,126,130,132Te

“…[1,6] and are briefly summarized k , the attenuated AC coefficients divided by the unattenuated ones. The G k coefficients are functions of the mean lifetime of the nuclear state, τ , and the precession frequency, ω F F ′ , which is proportional to the g factor and where F and F ′ represent initial and final couplings.…”

“…The recoil-in-vacuum (RIV) technique [1] utilizing the magnetic hyperfine interaction between the nucleus and its orbital electrons was first introduced in the 1970's to measure g factors of excited nuclear states with ps lifetimes. At that time RIV studies focused on light elements [2][3][4] and a few medium-mass nuclei [5] had been studied as well.…”

Orientation of 1s electrons using tilted foils

“…First we consider an analogue of the models used to analyse nuclear polarization produced by multi-tilted foils and surfaces [21,26,30,31]. We assume that within a foil, the electronic states of the outer electrons (n 2) are destroyed, but the ions exit each foil in the same state of excitation characterized by a specific angular momentum L N and an orientation P L .…”

“…Many different methods are employed for producing beams of oriented ions, such as direct optical pumping [3], scattering off of magnetic surfaces [4], transmission through magnetic layers [5,6], charge exchange in spin-polarized targets [7][8][9][10][11][12][13][14], transmission through tilted foils [15][16][17][18][19][20], scattering from inclined surfaces [21][22][23][24] and use of multitilted foils or surfaces [21,[25][26][27][28][29][30][31]. Of these the least expensive and most universally applicable are the methods involving tilted foils and surfaces [32].…”