964 resultados para Angular retreat


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"1250 copies printed."

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Mode of access: Internet.

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On verso: Major Carl K. Hart (center), second Commanding Officer, from June 28 to August 10, 1943, with Lt. C.D. Vaughn (left), and Lt. Ralph L. Bergh. Taken at Retreat in honor of Col. F.C. Rogers, Commandant, U.S. Army Forces, University of Michigan, July 2, 1943, on Ferry Field.

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To left of Col.-Major Vollrath, executive, Lt. C.D. Vaughan, adjutant, Major Carl K. Hart, Lt. Ralph L. Bergh, and Harry H. Wilson.

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Mode of access: Internet.

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Includes bibliographical references.

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We explore the calculation of unimolecular bound states and resonances for deep-well species at large angular momentum using a Chebychev filter diagonalization scheme incorporating doubling of the autocorrelation function as presented recently by Neumaier and Mandelshtam [Phys. Rev. Lett. 86, 5031 (2001)]. The method has been employed to compute the challenging J=20 bound and resonance states for the HO2 system. The methodology has firstly been tested for J=2 in comparison with previous calculations, and then extended to J=20 using a parallel computing strategy. The quantum J-specific unimolecular dissociation rates for HO2-> H+O-2 in the energy range from 2.114 to 2.596 eV have been reported for the first time, and comparisons with the results of Troe and co-workers [J. Chem. Phys. 113, 11019 (2000) Phys. Chem. Chem. Phys. 2, 631 (2000)] from statistical adiabatic channel method/classical trajectory calculations have been made. For most of the energies, the reported statistical adiabatic channel method/classical trajectory rate constants agree well with the average of the fluctuating quantum-mechanical rates. Near the dissociation threshold, quantum rates fluctuate more severely, but their average is still in agreement with the statistical adiabatic channel method/classical trajectory results.

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The modified polarization spectroscopy method was applied for determination of angular momenta of autoionizing states of Pu in multistep resonance ionization processes. In comparison with the known one, our method does not require circular polarization at all, only linear polarizations are needed. This simplicity was reached using a three-dimensional excitation geometry. Angular momenta of nine new autoionizing <sup>242</sup>Pu states were determined. The method suggested could be applied for efficiency improvement in multistep RIMS applications as well as for the odd-even isotope separation for elements with a J = 0 ground state (Pu, Yb, Sm etc.).