Zobrazeno 1 - 10
of 47
pro vyhledávání: '"M. Westerlind"'
Autor:
M. Westerlind, J. P. Kirkland, Jamal Suleiman, Donald S. Gemmell, Joseph C. Woicik, Y. Azuma, Ivan A. Sellin, H. G. Berry
Publikováno v:
Physical Review A. 51:447-453
Using X-ray photons at the X24A, X23B and X23A2 beam lines at NSLS, we measured the total photo-attenuation cross section of helium for photons in the energy range of 3 to 14 keV. In this range the photoionization cross section decreases rapidly with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8f67ca52a20bfd705fc4a30a4866c473
https://doi.org/10.1103/physreva.51.447
https://doi.org/10.1103/physreva.51.447
Autor:
M. Westerlind, S. B. Elston, R. D. Miller, Ivan A. Sellin, Henrik Cederquist, L. R. Andersson, N. Keller, C. Biedermann
Publikováno v:
Physical Review A. 50:462-467
In an earlier experiment by H. Cederquist et al. [J. Phys. B 18, 3951 (1985)] an unusual Q-value distribution for true double-electron capture was reported for 400-eV ${\mathrm{C}}^{4+}$-Ne collisions: a strong population of reaction channels resulti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2de07cf8ad77b82b553d9dff64d1047c
https://doi.org/10.1103/physreva.50.462
https://doi.org/10.1103/physreva.50.462
Publikováno v:
Physica Scripta. 49:561-564
Beam-foil lifetime measurements of doubly-excited states of beryllium are shown to indicate the competing effects of decay by radiation and autoionization. Levels of the 2p3p3P and 2p3d1,3D terms cannot autoionize through the Coulomb interaction, but
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5bbadc2bd4ce18718fe7bef1383a8556
https://doi.org/10.1088/0031-8949/49/5/010
https://doi.org/10.1088/0031-8949/49/5/010
Publikováno v:
Physica Scripta. 49:303-307
Experimental lifetimes of quartet levels in the 2p53p2 and 2p53s3d core-excited configurations in Na-like S VI and Cl VII have been measured using the beam-foil method. A theoretical study of the different decay modes of the quartet levels, using the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cd9a64da04e68f5a024afa1e07e049f1
https://doi.org/10.1088/0031-8949/49/3/008
https://doi.org/10.1088/0031-8949/49/3/008
Autor:
S. B. Elston, Henrik Cederquist, R. D. Miller, Ivan A. Sellin, L. R. Andersson, M. Westerlind, N. Keller, C. Biedermann
Publikováno v:
Physical Review A. 48:3684-3688
We have studied the angular distributions of double-electron capture in C 4+ +He collisions in the 400-800-eV collision energy range. At all measured energies an interference pattern has been observed which is attributed to Stueckelberg oscillations.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e1b2f250e7e9aa51c028616e1556a989
https://doi.org/10.1103/physreva.48.3684
https://doi.org/10.1103/physreva.48.3684
Publikováno v:
Physica Scripta. 48:413-424
The spectrum of seven times ionized sulfur, S VIII, has been observed in the wavelength range 50-1200 A. Both beam-foil and laser-produced plasma light sources have been used. 71 new lines representing the transitions 2p5-2p43d, 2p43s-3p, 3p-3d, 3d-4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::736f93703ab90d33386ac878fe73dc46
https://doi.org/10.1088/0031-8949/48/4/005
https://doi.org/10.1088/0031-8949/48/4/005
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 25:2459-2472
This paper reports an investigation of the spectrum and term system of He-like carbon, C V. A total of 97 lines in the 30-5000 AA interval are now identified by combining previously known data with many newly observed transitions obtained by the beam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f66f150791c795f7a6703a1790679ab0
https://doi.org/10.1088/0953-4075/25/11/004
https://doi.org/10.1088/0953-4075/25/11/004
Publikováno v:
Physical Review A. 45:6198-6201
Lifetimes of the 2{ital p}{sup 5}3{ital s} {sup 1}{ital P}{sub 1} and {sup 3}{ital P}{sub 1} levels in SVII and ClVIII have been measured using the beam-foil technique. The results are 17.4{plus minus}0.5 (13{plus minus}1) and 52{plus minus}2 (27{plu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fa6d91988545706efe2f68ac4eb6129
https://doi.org/10.1103/physreva.45.6198
https://doi.org/10.1103/physreva.45.6198
Publikováno v:
Physica Scripta. 44:582-586
Using the beam-foil technique we have investigated the 2p63l 2L-2p53s3l 2,4L transitions which connect the normal and core-excited termsystems in Na-like S VI and Cl VII. From the observed wavelengths absolute excitation energies have been derived fo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89abca65dd8131e3798329168f6e77b4
https://doi.org/10.1088/0031-8949/44/6/013
https://doi.org/10.1088/0031-8949/44/6/013
Publikováno v:
Physica Scripta. 43:166-169
We report a beam-foil study of multiply ionized bromine in the region 400-1300 A, performed with 6 and 8 MeV Br ions from a tandem accelerator. At these energies transitions belonging to Fe-like Br X and Mn-like Br XI are expected to be prominent. We
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fa27476c861f5e6d6281e7996f899972
https://doi.org/10.1088/0031-8949/43/2/009
https://doi.org/10.1088/0031-8949/43/2/009