Rapid and precise method to convert a two dimensional image from Cartesian to polar coordinate

Wu, Weimin; Kato, Yoshihiro; Yamazaki, K.; Yoshino, M.; Danjo, A.
September 1997
Review of Scientific Instruments;Sep97, Vol. 68 Issue 9, p3490
Academic Journal
Describes a method to convert a two-dimensional image to a polar coordinate system in which physical quantities are expressed. Use of a toroidal analyzer to measure the energy and angle of the scattered electron in the measurement of differential cross section for electron-impact excitation of atoms or ions; Numerical calculation method for data conversion.


Related Articles

  • On Excitation and Loss of an Electron by Incident Ions in Relativistic Collisions with Atoms. Voıtkiv, A. B.; Grün, N.; Scheid, W. // Journal of Experimental & Theoretical Physics;Oct2000, Vol. 91 Issue 4, p661 

    The excitation and loss of an electron by ions in relativistic collisions with atoms are studied in firstorder perturbation theory. General expressions are obtained for the cross sections for the excitation and loss of an electron. In the limit of nonrelativistic collision velocities these...

  • Effects of nonzero correlation time of system–reservoir interaction on the excitation profiles of second-order optical processes in β-carotene. Watanabe, Junji; Kinoshita, Shuichi; Kushida, Takashi // Journal of Chemical Physics;10/15/1987, Vol. 87 Issue 8, p4471 

    Excitation spectra for narrow Raman lines and a broad luminescence band have been measured in β-carotene in isopentane at 177 K over a wide spectral range on the low-energy side of the 1Ag–1Bu absorption band. The result has been found to be well explained by a stochastic theory that...

  • Dissociative excitation of GeH4 by collisions with Ar and He active species. Tsuji, Masaharu; Kobarai, Kazunari; Nishimura, Yukio // Journal of Chemical Physics;9/1/1990, Vol. 93 Issue 5, p3133 

    The product channels in reactions of metastable Ar(3P2) and He(23S) atoms and Ar+, (Ar+)*, He+, and He+2 ions with GeH4 have been studied by observing emission spectra in the flowing afterglow and beam apparatus. H*, Ge*, GeH(A 2Δ–X 2Π), and GeH+(a 3Π0+,1–X 1Σ+)...

  • Production possibility of61Cu using proton induced nuclear reactions on zinc for PET studies. Szelecsényi, F.; Kovács, Z.; Suzuki, K.; Okada, K.; van der Walt, T.N.; Steyn, G.F.; Mukherjee, S. // Journal of Radioanalytical & Nuclear Chemistry;Feb2005, Vol. 263 Issue 2, p539 

    We present a new trial to measure real time water movement in a living plant using the positron emitting radionuclide,15O.15O was prepared by14N(d,n)15O reaction and 10 ml of15O labeled water (2 GBq) was supplied from the root of a soybean plant. To detect activity, an imaging plate (IP) as well...

  • Temperature dependence of negative ion lifetimes. Cannon, M.; Liu, Y.; Suess, L.; Dunning, F. B.; Steill, J. D.; Compton, R. N. // Journal of Chemical Physics;8/14/2007, Vol. 127 Issue 6, p064314 

    The autodetachment lifetimes of SF6-* and C6F6-* ions formed by charge transfer in K(np)/SF6, C6F6 collisions are measured as a function of target temperature over the range of ∼300–600 K with the aid of time-of-flight techniques and a Penning ion trap. At room temperature only...

  • Vibrational excitation of methane by 15 and 30 eV intermediate-energy electron impact. Motte-Tollet, F.; Heinesch, J.; Gingell, J.M.; Mason, N.J. // Journal of Chemical Physics;4/8/1997, Vol. 106 Issue 14, p5990 

    Studies the absolute measurements of differential electron-collision cross sections for the vibrational excitation of methane in its electron ground state. Normalization of the absolute scale carried out using inelastic/elastic ratios; Small scattering angular range where minima have been...

  • Dissociative scattering of hyperthermal energy CF3+ ions from modified surfaces. Rezayat, Talayeh; Shukla, Anil // Journal of Chemical Physics;2/28/2007, Vol. 126 Issue 8, p084701 

    Dissociative scattering of CF3+ ions in collision with a self-assembled monolayer surface of fluorinated alkyl thiol on a gold 111 crystal has been studied at low ion kinetic energies (from 29 to 159 eV) using a custom built tandem mass spectrometer with a rotatable second stage energy analyzer...

  • On the time scale and time course of protein conformational changes. Jackson, Meyer B. // Journal of Chemical Physics;11/1/1993, Vol. 99 Issue 9, p7253 

    Proteins change their global conformation very slowly compared to the time scales of most localized internal motion. The relationship between these slow and fast processes was investigated with the aid of a stochastic model recently applied to a related problem of protein folding [Zwanzig et...

  • Communications: A rigorous transition state based approach to state-specific reaction dynamics: Full-dimensional calculations for H+CH4→H2+CH3. Schiffel, Gerd; Manthe, Uwe // Journal of Chemical Physics;5/21/2010, Vol. 132 Issue 19, p191101 

    Full-dimensional quantum dynamics calculations studying all initial state-selected reaction probabilities of the H+CH4→H2+CH3 reaction relevant at total energies below 0.58 eV are presented. The calculations employ a flux correlation function based approach to obtain the initial...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics