排序方式: 共有52条查询结果,搜索用时 15 毫秒
1.
Brandau C. Bartsch T. Böhm S. Böhme C. Hoffknecht A. Kieslich S. Knopp H. Schippers S. Shi W. Müller A. Grün N. Scheid W. Steih T. Bosch F. Franzke B. Kozhuharov C. Krämer A. Mokler P. H. Nolden F. Steck M. Stöhlker T. Stachura Z. 《Hyperfine Interactions》2003,146(1-4):41-45
Hyperfine Interactions - An overview of measurements of dielectronic recombination (DR) with the heaviest lithiumlike ions is presented. The experiments have been carried out at the heavy ion... 相似文献
2.
Stohlker T Mokler PH Bosch F Dunford RW Franzke F Klepper O Kozhuharov C Ludziejewski T Nolden F Reich H Rymuza P Stachura Z Steck M Swiat P Warczak A 《Physical review letters》2000,85(15):3109-3112
The Lyman- alpha transitions of hydrogenlike uranium associated with electron capture were measured in collisions of stored bare U (92+) ions with gaseous targets at the storage ring ESR. By applying the deceleration technique, the experiment was performed at slow collision energies in order to reduce the uncertainties associated with Doppler corrections. From the measured centroid energies, a ground state Lamb shift of 468 eV+/-13 eV is deduced which gives the most precise test of quantum electrodynamics for a single electron system in the strong field regime. In particular, the technique applied paves the way towards the 1 eV precision regime. 相似文献
3.
H. W. Schffer P. H. Mokler R. W. Dunford C. Kozhuharov A. Krmer A. E. Livingston T. Ludziejewski H. -T. Prinz P. Rymuza L. Sarkadi Z. Stachura Th. Sthlker P. Swiat A. Warczak 《Physics letters. A》1999,260(6):331-494
The photon energy differential shape of the second order matrix element for the two-photon (2E1) decay of the 1s2s1S0 level in He-like gold has been measured. The results are in agreement with a recent fully relativistic calculation. The corresponding 2E1 matrix element deviates from those in lighter He-like systems due to the strong central field in a heavy two-electron ion. 相似文献
4.
We prove that unitary multiplicative operators associated with double Lie groups are manageable. 相似文献
5.
T. Ludziejewski T. Stöhlker S. Keller H. Beyer F. Bosch O. Brinzanescu C. Kozhuharov A. Krämer D. Liesen P.H. Mokler R.H. Pratt P. Rymuza C.D. Shaffer Z. Stachura P. Świat A. Warczak 《Hyperfine Interactions》1998,114(1-4):165-169
Electron bremsstrahlung has been investigated for collisions of 223.2 MeV/amu He-like uranium ions with N2 and Ar gaseous targets. The doubly differential cross-sections for bremsstrahlung are compared to the predictions of relativistic
first order Born calculations (Bethe-Heitler formula with Elwert correction factor) and to the calculations based on the exact
wavefunctions for electrons moving in the external point-Coulomb potential of the projectile. Whereas the “exact” IPA calculations
give an improved agreement with experimental data, as compared to the Bethe-Heitler theory, in particular at the end-point
region of the bremsstrahlung spectra, discrepancies still remain at lower photon energies.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
6.
Drożdż Ewa Stachura Małgorzata Wyrwa Jan Rękas Mieczysław 《Journal of Thermal Analysis and Calorimetry》2015,120(1):157-166
Journal of Thermal Analysis and Calorimetry - Tetragonal zirconia (3YSZ) and cermet nickel–tetragonal zirconia (Ni/3YSZ) were obtained by citric method. The porosity of samples was increased... 相似文献
7.
C. Brandau F. Bosch B. Franzke L. Groening A. Hoffknecht H. Knopp C. Kozhuharov P.H. Mokler A. Müller Z. Stachura M. Steck T. Stöhlker T. Winkler 《Hyperfine Interactions》1998,114(1-4):263-266
After an extended upgrading period at the Experimental Storage Ring (ESR) of the GSI in Darmstadt, an experiment on recombination
of lithium-like uranium has been carried out. A 107.1 MeV/u U89+ beam with up to 500 μA effective current was stored and cooled. In addition to measurements of radiative recombination (RR)
and dielectronic recombination (DR) with high energy resolution in the range of 0–90 eV, the diagnostic properties of DR have
been utilized to characterize the new cooler setup. Preliminary experimental results for the 1s22p3/25ℓj(j=3/2,5/2) resonance manifolds are presented and compared with theoretical predictions.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
8.
Stöhlker T. Gumberidze A. Ma X. Beyer H. F. Bednarz G. Bosch F. Cai X. Fritzsche S. Hagmann S. Kozhuharov C. Klepper O. Liesen D. Mokler P. H. Sierpowski D. Stachura Z. Steck M. Surzhykov A. Toleikis S. Warczak A. Zou Y. 《Hyperfine Interactions》2003,148(1-4):97-102
Hyperfine Interactions - The magnetic order and crystallization of the amorphous Fe75Si15B10 alloy prepared by mechanical alloying was studied in situ by 57Fe Mössbauer spectroscopy. These... 相似文献
9.
P. Rymuza T. Stöhlker D.C. Ionescu F. Bosch C. Kozhuharov D. Liesen T. Ludziejewski A. Krämer P.H. Mokler Z. Stachura P. Świat A. Warczak 《Hyperfine Interactions》1998,114(1-4):171-174
The study of projectile excitation of high-Z ions in collisions with light target atoms is a powerful tool for the investigation of magnetic and higher-order effects
occurring in relativistic collisions. Very first investigations performed for bismuth ions were recently extended at the ESR
storage ring by using He-like uranium ions in collisions with gaseous targets. At the ESR jet target, the absence of solid-state
effects (e.g., multiple collisions) allows one to study higher order processes, such as excitation and ionization or excitation
and capture, occurring in single collisions.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
10.
P. H. Mokler Th. Stöhlker C. Kozhuharov Z. Stachura A. Warczak 《Zeitschrift für Physik D Atoms, Molecules and Clusters》1991,21(3):197-200
Radiative Electron Capture (REC) in collisions of hydrogenic germanium ions with hydrogen is measured for projectile energies between 4 and 12 MeV/u. Extrapolating the resulting centroid energies of the K-REC radiation to zero collision velocity theK-binding energy in helium-like germanium-ions is determined. The value compares well with the theoretical prediction. REC in atomic collisions is advertised as a spectroscopic tool for structure investigations of very heavy few-electron projectiles. 相似文献