Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Leutenegger, Maurice"'
Autor:
Shah, Chintan, Kühn, Steffen, Bernitt, Sonja, Steinbrügge, René, Togawa, Moto, Berger, Lukas, Buck, Jens, Hoesch, Moritz, Seltmann, Jörn, Kozlov, Mikhail G., Porsev, Sergey G., Gu, Ming Feng, Porter, F. Scott, Pfeifer, Thomas, Leutenegger, Maurice A., Cheung, Charles, Safronova, Marianna S., López-Urrutia, José R. Crespo
Publikováno v:
Physical Review A 109, 063108 (2024)
We used the monochromatic soft-x-ray beamline P04 at the synchrotron-radiation facility PETRA III to resonantly excite the strongest $2p-3d$ transitions in neon-like Ni XIX ions, $[2p^6]_{J=0} \rightarrow [(2p^5)_{1/2}\,3d_{3/2}]_{J=1}$ and $[2p^6]_{
Externí odkaz:
http://arxiv.org/abs/2404.14589
Autor:
Grell, Gabriel J., Leutenegger, Maurice A., Amaro, Pedro, López-Urrutia, José R. Crespo, Shah, Chintan
We calculated cross sections for the dielectronic recombination (DR) satellite lines of Fe XVII and benchmarked our predictions with experimental cross sections of Fe XVII resonances that were mono-energetically excited in an electron beam ion trap.
Externí odkaz:
http://arxiv.org/abs/2402.08767
Autor:
Shah, Chintan, Togawa, Moto, Botz, Marc, Danisch, Jonas, Goes, Joschka J., Bernitt, Sonja, Maxton, Marleen, Köbnick, Kai, Buck, Jen, Seltmann, Jörn, Hoesch, Moritz, Gu, Ming Feng, Porter, F. Scott, Pfeifer, Thomas, Leutenegger, Maurice A., Cheung, Charles, Safronova, Marianna S., López-Urrutia, José R. Crespo
Publikováno v:
The Astrophysical Journal, 969, 52 (2024)
We improve by a factor of 4-20 the energy accuracy of the strongest soft X-ray transitions of Fe XVII ions by resonantly exciting them in an electron beam ion trap with a monochromatic beam at the P04 beamline of the PETRA III synchrotron facility. B
Externí odkaz:
http://arxiv.org/abs/2401.08395
Autor:
Kühn, Steffen, Cheung, Charles, Oreshkina, Natalia S., Steinbrügge, René, Togawa, Moto, Bernitt, Sonja, Berger, Lukas, Buck, Jens, Hoesch, Moritz, Seltmann, Jörn, Trinter, Florian, Keitel, Christoph H., Kozlov, Mikhail G., Porsev, Sergey G., Gu, Ming Feng, Porter, F. Scott, Pfeifer, Thomas, Leutenegger, Maurice A., Harman, Zoltán, Safronova, Marianna S., López-Urrutia, José R. Crespo, Shah, Chintan
Publikováno v:
Physical Review Letters 129, 245001 (2022)
One of the most enduring and intensively studied problems of X-ray astronomy is the disagreement of state-of-the art theory and observations for the intensity ratio of two Fe XVII transitions of crucial value for plasma diagnostics, dubbed 3C and 3D.
Externí odkaz:
http://arxiv.org/abs/2201.09070
Autor:
Shah, Chintan, Hell, Natalie, Hubbard, Antonia, Gu, Ming Feng, MacDonald, Michael J., Eckart, Megan E., Kelley, Richard L., Kilbourne, Caroline A., Leutenegger, Maurice A., Porter, F. Scott, Brown, Gregory V.
Publikováno v:
The Astrophysical Journal, 914, 34 (2021)
We report measurements of electron-impact excitation cross sections for the strong K-shell n=2-1 transitions in S XV using the LLNL EBIT-I electron beam ion trap, two crystal spectrometers, and the EBIT Calorimeter Spectrometer. The cross sections ar
Externí odkaz:
http://arxiv.org/abs/2106.06493
Autor:
Togawa, Moto, Kühn, Steffen, Shah, Chintan, Amaro, Pedro, Steinbrügge, René, Stierhof, Jakob, Hell, Natalie, Rosner, Michael, Fujii, Keisuke, Bissinger, Matthias, Ballhausen, Ralf, Hoesch, Moritz, Seltmann, Jörn, Park, SungNam, Grilo, Filipe, Porter, F. Scott, Santos, José Paulo, Chung, Moses, Stöhlker, Thomas, Wilms, Jörn, Pfeifer, Thomas, Brown, Gregory V., Leutenegger, Maurice A., Bernitt, Sven, López-Urrutia, José R. Crespo
Publikováno v:
Physical Review A 102, 052831 (2020)
We resonantly excite the $K$ series of O$^{5+}$ and O$^{6+}$ up to principal quantum number $n=11$ with monochromatic x rays, producing $K$-shell holes, and observe their relaxation by soft-x-ray emission. Some photoabsorption resonances of O$^{5+}$
Externí odkaz:
http://arxiv.org/abs/2003.05965
Autor:
Kühn, Steffen, Shah, Chintan, López-Urrutia, José R. Crespo, Fujii, Keisuke, Steinbrügge, René, Stierhof, Jakob, Togawa, Moto, Harman, Zoltán, Oreshkina, Natalia S., Cheung, Charles, Kozlov, Mikhail G., Porsev, Sergey G., Safronova, Marianna S., Berengut, Julian C., Rosner, Michael, Bissinger, Matthias, Ballhausen, Ralf, Hell, Natalie, Park, SungNam, Chung, Moses, Hoesch, Moritz, Seltmann, Jörn, Surzhykov, Andrey S., Yerokhin, Vladimir A., Wilms, Jörn, Porter, F. Scott, Stöhlker, Thomas, Keitel, Christoph H., Pfeifer, Thomas, Brown, Gregory V., Leutenegger, Maurice A., Bernitt, Sven
Publikováno v:
Phys. Rev. Lett. 124, 225001 (2020)
For more than 40 years, most astrophysical observations and laboratory studies of two key soft x-ray diagnostic $2p-3d$ transitions, $3C$ and $3D$, in Fe XVII ions found oscillator strength ratios $f(3C)/f(3D)$ disagreeing with theory, but uncertaint
Externí odkaz:
http://arxiv.org/abs/1911.09707