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[en] This paper reports that computation of ion trajectories requires accurate knowledge of electromagnetic fields. The authors have developed a field modeling process for computing ion trajectories which reconstructs a field using a summation of multipole potentials. The resulting closed-form expression offers increased speed and accuracy compared to interpolative schemes
[en] A Polarizational-Polarizational Correlation from Oriented Nuclei (PPCO) measuring method is described. The method allows one to determine spin and parity of the excited states of nuclei as well as multipole gamma transitions
[en] SimTrack is a simple c++ library designed for the numeric particle tracking in the high energy accelerators. It adopts the 4th order symplectic integrator for the optical transport in the magnetic elements. The 4-D and 6-D weak-strong beam-beam treatments are integrated in it for the beam-beam studies. SimTrack is written with c++ class and standard template library. It provides versatile functions to manage elements and lines. It supports a large range of types of elements. New type of element can be easily created in the library. SimTrack calculates Twiss, coupling and fits tunes, chromaticities and corrects closed orbits. AC dipole and AC multipole are available in this library. SimTrack allows change of element parameters during tracking.
[en] Nearly ten years ago evidence was published for the first of the socalled giant multipole resonances, the giant quadrupole resonance. During the ensuing years research in this new field has spread to many nuclear physics laboratories throughout the world. A review of the present status of electric giant multipole resonances is provided in this presentation. Other presentations to this conference will describe magnetic giant resonances, giant resonance decay modes, and theoretical implications for the new giant resonances. (orig.)
[en] Separable solutions of finite plasma pressure equilibrium in a point multipole are found. Using the energy principle it is demonstrated that these solutions are interchange stable for quadripole and sextipole configurations. The low and high pressure forms of the solution in sextipole configuration are explicitly displayed
[en] Measurement of E2/M1 multipole mixing ratios of transitions in even-even nuclei have long provided important tests of nuclear models. The available experimental data on E2 / M1 multipole mixing ratios of gamma transitions de-exciting levels of beta and gamma vibrational bands to the ground state rotational band in even-even nuclei with 150 ≤ A ≤ 200 have been reviewed. The results have been compared to the predictions of the dynamic deformation model and the interacting boson model. (authors)
[en] Using effective interactions based on a Brueckner G-matrix I calculate natural-parity isoscalar vibrations in 48Ca. The conventional RPA theory is extended to include 1p1h- as well as 2p2h-excitations in a consistent way. The results indicate an increasing role of configuration mixing effects with increasing multipolarity of the isoscalar excitation. 6 refs., 2 figs. (author)
[en] Strongly intertwined interaction among spin, orbital and charge degrees of freedom is the essence to induce emergent materials properties, and the investigation to understand their interplay has been actively pursued. In particular, resonant X-ray scattering technique has demonstrated powerful applications in unveiling their long-range ordering behavior with its enhanced sensitivity to the aforementioned degree of freedom. Here, we further demonstrated the spectroscopic application of the technique by providing experimental evidence to reveal spin polarizations in 4f and 5d orbital of the magnetic Tm ions with the orbital-selectivity, which introduced a route to understand fundamental mechanism of spin polarization in the compound. The enhanced sensitivity of the resonant X-ray scattering to various electric multipole transitions expects to find strong applications in studying various spin and polar ordering in materials to include high-order moments.
[en] The magnetic harmonic errors of the Fermilab Recycler ring were examined using circulating beam data taken with closed local orbit bumps. Data was first parsed into harmonic orbits of first, second, and third order. Each of which was analyzed for sources of magnetic errors of corresponding order. This study was made possible only with the incredible resolution of a new BPM system that was commissioned after June of 2003