Magnetic moment excited state

The ground- and excited-state magnetic moments ji are tabulated as /ig = 0.09062(3) n.m. (nuclear magnetons, /i ) and jig, = 0.1549 n.m., respectively (see Table Properties of Isotopes Relevant to Mdssbauer Spectroscopy provided by courtesy of Professor J. G. Stevens, Mdssbauer Effect Data Center, cf. CD-ROM). Considering that nuclear magnetic moments are given by the relation p, = giPj I, the nuclear g factors for Ee with /g = 1/2 and 1 = 3/2 are gg = 0.09062 X 2 and ge = 0.1549 x 2/3. With these values and taken from... 

Excited State Magnetic Moment. The magnetic moment of the Te 35.6-k.e.v. level has been measured by Shikazono (13) and Hunt-zicker et al, (8). Sources were prepared by diffusing Sb into metallic Fe foils. The Te impurities produced by the decay of Sb experience a hyperfine field at the Te nucleus transferred from the ferromagnetic... 

Early attempts to observe magnetic splitting involved the use of external fields on non-magnetic metals, but gave poor results because of lack of resolution [35,36]. The various estimates [36-44] of the excited-state magnetic moment made since then are given in Table 14.2, and were calculated assum-... 

Table 14.2 Estimates of the excited state magnetic moment, fit (fit = —1-046 n.m.)...

A 77-8-kG external field has been apphed to soUd krypton along the direction of observation to determine the excited-state magnetic moment,... 

Finally, the excited-state magnetic moment of Xe has been measured by applying a 78-kG external magnetic field to a xenon clathrate absorber [123]. Computer analysis of the broadened spectrum gave = -f0-68(30) n.m. 

A 1 at. % alloy of in iron (source) with a HfN single-line absorber shows a partially resolved five-line magnetic spectrum [33]. The known excited-state magnetic moment for Hf of = 0-71 n.m. leads to values for the internal magnetic field of 606 kG at 4-2 K and 547 kG at 78 K. By contrast, a 1 at. % alloy of i ° "Hf in iron for which /[Pg.506]

As far as computational cost is concerned, the evaluation of the ground state magnetic moment is trivial and the TRICKS-TDDFT part is simply a normal TDDFT calculation of excitation energies but with an unusual choice of reference state orbital occupations. Preliminary results indicate that the accuracy of TRICKS-TDDFT excitation energies is similar or perhaps a little inferior to that of standard TDDFT calculations (88). 

Quantitative analysis provides values for the ground and excited state magnetic dipole moments and the -factors based on determination of the Faraday terms and the dipole strength of the corresponding electronic absorption band. 

UF4, has a non-cubic symmetry, and shows a quadrupole interaction of = 80 mm s at 4-2 K (from the 1=2 excited state). The U + ion has a 5/° configuration and magnetic ordering is not found, but quadrupole splittings of = —169 mm s" in(U02)(N03)2.6H20 and+160mm s in UO3 were found. The former is illustrated in Fig. 18.3. The excited-state quadrupole moment is unknown but is probably about —3 bam. Chemical isomer shifts for U and U were the same within experimental error ( 2 mm s ), which places an upper limit of 10 on This is... 

The magnitude of the separation between the adjacent states of a term indicates the strength of the spin-orbit coupling, and in all but two cases (Sm and Eu ) it is sufficient to render the first excited state of the Ln ions thermally inaccessible, and so the magnetic properties are determined solely by the ground state. It can be shown that the magnetic moment expected for such a situation is given by ... 

Fe(6-Mepy)2(py)tren] (004)2 Doped in PSS. Magnetic susceptibilities measured for a microcrystalline sample of the complex produce a magnetic moment value = 0.36 pg at 10 K and 0.61 pg at 150 K, followed by a gradual increase to Peff = 2.80 pe at 311 K [138]. Thus 26% of the complexes are in the HS state at 300 K if a magnetic moment of 5.1 Pe is assumed for the pure HS compound. On the other hand, the complex doped into a polystyrene sulfonate (PSS) film does not provide any evidence for a thermal population of the HS state up to 340 K as demonstrated by variable-temperature UV-VIS and Mossbauer spectra. In fact, all the complexes doped into the PSS film are in the LS state at temperatures below 340 K. However, if irradiated by a single pulse of a Q-switched Nd/YAG laser (532 mp), the complex is excited from the LS ground state to the HS J2 states via an intermediate MLCT state and the metal states. The subsequent back relaxation from the excited T2 state to the... 

Fig. 7.3 Effect of magnetic dipole interaction (7/m), electric quadmpole interaction (Hq), and combined interaction// = Hu + //q, Em> q on the Mossbauernuclear levels of Ni. The larger spacings between the sublevels of the ground state are due to the somewhat larger magnetic dipole moment of the nuclear ground state as compared to the excited state. The relative transition probabilities for a powder sample as well as the relative positions of the transition lines are indicated by the stick spectra below...

In experiments with magnetic fields between 13 and 55 mT (130-550 G) applied to the single crystal source, the authors of [58] observed magnetic dipole interaction in addition to electric quadmpole splitting in a reduced spectrum (Fig. 7.22) [58]. They determined the magnetic moment of the excited 1/2 state to be U(l/2 ) = +(0.58 0.03))In-... 

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