Zobrazeno 1 - 10
of 53
pro vyhledávání: '"V. Beltrán-López"'
Autor:
Naoyuki Takahashi, Takato Nakamura, T. Matsuzawa, V. Beltrán-López, Graham Smith, Kazuhiko Kaiya, Christopher C. Rowlands, P.C. Riedi
Publikováno v:
Journal of Materials Chemistry. 10:2566-2569
The europium(II) sites in Sr4Al 14O25 ∶ Eu phosphor with blue emission were examined by means of high frequency (90 and 180 GHz) EPR spectroscopy. The ions occupy two low symmetry sites in the Sr4Al 14O25 lattice with |D| = 0.100 and 0.0907 cm−1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc918dd9ba1555cd81508490f094ba22
https://doi.org/10.1039/b004061o
https://doi.org/10.1039/b004061o
Autor:
P.C. Riedi, V. Beltrán-López, Takato Nakamura, Christopher C. Rowlands, Naoyuki Takahashi, T. Matsuzawa, Graham Smith, Kazuhiko Kaiya
Publikováno v:
Physical Chemistry Chemical Physics. 1:4011-4014
High frequency EPR spectra of europium(II)-doped BaAl2O4 powder phosphor have been analysed. Spectral simulation was carried out by a Fourier transform Monte Carlo method using an equation derived from the second-order perturbation of the energy leve
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::270a52279809c519a874d24e13dbedd2
https://doi.org/10.1039/a903385h
https://doi.org/10.1039/a903385h
Publikováno v:
J. Chem. Soc., Faraday Trans.. 92:2303-2310
An exact analytical solution for the powder pattern of an ion with orthorhombic effective g factor is found by use of the isotimic method. Theoretical first-derivative powder EPR spectra are obtained by convoluting the product of the analytic powder
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::186accb05e36ce74df194010fa4e0384
https://doi.org/10.1039/ft9969202303
https://doi.org/10.1039/ft9969202303
Autor:
V. Beltrán-López, José Jiménez-Mier
Publikováno v:
Physical Review A. 43:4026-4029
The effect of correlation on the ${\mathit{g}}_{\mathit{J}}$ factors of ground-state and some metastable 2s- and 2p-row atoms is evaluated from experimental data and theoretical values calculated within the Hartree-Fock scheme. By taking the accurate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::040eaf2d39f65be123adb0f20d563b19
https://doi.org/10.1103/physreva.43.4026
https://doi.org/10.1103/physreva.43.4026
Autor:
V Beltrán-López, L. González-Tovany
Publikováno v:
Journal of Magnetic Resonance (1969). 89:227-242
The shape of the powder pattern of the center resonance line ( m = 1 2 ↔ − 1 2 ) for EPR in orthorhombic symmetry, or NMR with quadrupole interaction, is determined for all values of the crystal field asymmetry parameter η by means of a general
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::113444455b7c2f395abc67c18ba46599
https://doi.org/10.1016/0022-2364(90)90230-7
https://doi.org/10.1016/0022-2364(90)90230-7
Autor:
V. Beltrán-López
Publikováno v:
Applied Magnetic Resonance. 11:351-351
The theoretical ESR spectrum of spins in randomly oriented crystals is built from the distribution function, or powder pattern, of the spins in resonance magnetic field, the anisotropic transition probability and the elementary lineshape of the cryst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::868a0b3d800070f797fa980f74aedd48
https://doi.org/10.1007/bf03162065
https://doi.org/10.1007/bf03162065
Autor:
V Beltrán-López, J Castro-Tello
Publikováno v:
Journal of Magnetic Resonance (1969). 39:437-460
An analytical method for calculating absorption functions and EPR lineshapes from polycrystalline samples is given. These are expressed in closed form through an integral over only the angle φ A general expression is derived for samples where the sp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c55b0c028d8cbf2c71b4c793677f70bb
https://doi.org/10.1016/0022-2364(80)90032-3
https://doi.org/10.1016/0022-2364(80)90032-3
Autor:
J Castro-Tello, V Beltrán-López
Publikováno v:
Journal of Magnetic Resonance (1969). 47:19-27
Analytical expressions for the powder pattern of axially symmetric systems with simultaneous anisotropy in principal-axes-coincident g and A tensors are derived. Approximate analytical solutions are also obtained for the powder pattern of copper phth
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28f1a2ac69fa3be6a2ac00857c4af984
https://doi.org/10.1016/0022-2364(82)90317-1
https://doi.org/10.1016/0022-2364(82)90317-1
Autor:
M.J Jiménez, V Beltrán-López
Publikováno v:
Journal of Magnetic Resonance (1969). 48:302-308
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1593ccfe9e7a28671c42e3b806efedae
https://doi.org/10.1016/0022-2364(82)90281-5
https://doi.org/10.1016/0022-2364(82)90281-5
Autor:
V Beltrán-López, S Eidels-Dubovoi
Publikováno v:
Journal of Magnetic Resonance (1969). 32:441-449
The perturbation theory method for obtaining the value of the axial crystal-field parameter D in a powder sample from the relative intensities of the main hyperfine EPR lines is revised. Calculations based on precise numerical diagonalization of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::700e095e5222e59e34a096c3e4633185
https://doi.org/10.1016/0022-2364(78)90059-8
https://doi.org/10.1016/0022-2364(78)90059-8