排序方式: 共有79条查询结果,搜索用时 17 毫秒
71.
Cubaynes D Meyer M Grum-Grzhimailo AN Bizau JM Kennedy ET Bozek J Martins M Canton S Rude B Berrah N Wuilleumier FJ 《Physical review letters》2004,92(23):233002
Completely fine-structure-resolved photoelectron spectra produced from sodium atoms selectively excited into the Na* 2p(6)3p (2)P(1/2) and (2)P(3/2) states were obtained using a third generation synchrotron source in conjunction with laser pumping and high-resolution spectrometry. The spectra show dramatically different behaviors. The strong variations observed in the regions of the Na+ 2p(5)3p (1,3)L(J) photolines and the Na+ 2p(5)4p (1,3)L(J) shakeup satellites are explained within a generalized geometrical model, accounting for the intermediate angular momentum coupling in the ionic states. 相似文献
72.
73.
M. Englert J. Kowalski F. Mayer R. Neumann S. Noehte R. Schwarzwald H. Suhr K. Winkler G. zu Putlitz Ch. J. Bordé S. Avrillier A. van Lerberghe Ch. Salomon Ch. Breant D. Bassi G. Scoles J. Helmcke D. Zevgolis B. Ü. Yen W. Gawlik F. Träger M. Vollmer E. Gustafson R. L. Byer J. H. M. Neijzen A. Donszelmann G. Leuchs J. Rerf H. Walther M. Inguscio A. Moretti F. Strumia J. L. Picqué J. L. Le Gouët F. Wuilleumier J. M. Bizau P. Dhez P. Koch D. Ederer O. Poulsen U. Nielsen N. I. Winstrup P. S. Ramanujam J. V. James X. Tang C. C. Wang 《Applied physics. B, Lasers and optics》1982,28(2-3):81-91
74.
Error growth in the numerical integration of periodic orbits by multistep methods, with application to reversible systems 总被引:4,自引:0,他引:4
We study the growth with time of (the coefficients of the asymptoticexpansion of) the error in the numerical integration with linearmultistep methods of periodic solutions of systems of ordinarydifferential equations. Particular attention is devoted to reversiblesystems. It turns out that symmetric linear multistep methodscannot be recommended in spite of the fact that they mimic thereversibility of the true flow. For reversible second-ordersystems, linear multistep methods without parasitic double rootsare useful. 相似文献
75.
We describe a simple method to measure the top quark mass in the
channel that may be useful in Run II of D? detector. The method is validated by applying it to the Run Ib eμ data. 相似文献
76.
JM Chatterjee M Saha Sarkar S Bhattacharya P Banerjee S Sarkar RP Singh S Murulithar RK Bhowmik 《Pramana》2001,57(1):165-169
High-spin states of 95,97Mo (Z=42, N=53,55) nuclei have been investigated through 82Se(18O, xn) reaction at Eb=60 MeV. The level scheme in 95Mo has been observed upto ≏ 10 MeV in the present experiment. The level structure shows mainly single particle character.
In 97Mo, the ground state level sequence has been extended to ≏ 4.5 MeV while the previous information had been up to 2.4 MeV.
A negative parity band built on 1437 keV (11/2−) excited state has been extended to 5.5 MeV. The structure seems to show a coexistence of single particle and collective
modes of excitation. Properties of both the nuclei have been compared with shell model calculations using OXBASH. 相似文献
77.
Background
Clinical spinal cord injury in domestic dogs provides a model population in which to test the efficacy of putative therapeutic interventions for human spinal cord injury. To achieve this potential a robust method of functional analysis is required so that statistical comparison of numerical data derived from treated and control animals can be achieved. 相似文献78.
Thissen R Bizau JM Blancard C Coreno M Dehon C Franceschi P Giuliani A Lemaire J Nicolas C 《Physical review letters》2008,100(22):223001
Coupling an ion trap with synchrotron radiation is shown here to be a powerful approach to measure photoionization cross sections on ionic species relaxed in their ground state. The photoionization efficiency curve of Xe+ ions stored in a Fourier transform ion cyclotron resonance ion trap was recorded at ELETTRA in the 20-23 eV photon energy range. Absolute cross sections were derived by comparison of the photoionization yield of Xe+ with measurements from the ASTRID merged-beam experiment. Multiconfiguration Dirac-Fock calculations were performed for the interpretation of these new data. 相似文献
79.
Fabrício RS Pereira Andréa Alessio Maurício S Sercheli Tatiane Pedro Elizabeth Bilevicius Jane M Rondina Helka FB Ozelo Gabriela Castellano Roberto JM Covolan Benito P Damasceno Fernando Cendes 《BMC neuroscience》2010,11(1):1-13