Search Results - "Hell, N."

K-shell X-Ray Emission from Lithium-like Nitrogen N v by Lepson, J. K., Beiersdorfer, P., Gu, M. F., Hell, N., Brown, G. V.

“…Abstract We present laboratory measurements of n = 3 → n = 1 N v X-ray emission lines situated near 26 Å. The lines are excited by electron-impact collisions…”
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Temperature Measurements Using the Dielectronic Satellite Lines of Fe xvii by Beiersdorfer, P., Hell, N., Lepson, J. K.

“…The coronal temperature of Capella and Procyon has been derived from the spectral emission of Fe XVII observed in high resolution with Chandra's High Energy…”
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An unexpectedly low oscillator strength as the origin of the Fexvii emission problem by Bernitt, S, Brown, G V, Rudolph, J K, Steinbruegge, R, Graf, A, Leutenegger, M, Epp, S W, Eberle, S, Kubicek, K, Maeckel, V, Simon, M C, Traebert, E, Magee, E W, Beilmann, C, Hell, N, Schippers, S, Mueller, A, Kahn, S M, Surzhykov, A, Harman, Z, Keitel, CH, Clementson, J, Porter, F S, Schlotter, W, Turner, J J, Ullrich, J, Beiersdorfer, P, Lopez-Urrutia, JRCrespo

“…Highly charged iron (Fe super(16+), here referred to as Fexvii) produces some of the brightest X-ray emission lines from hot astrophysical objects, including…”
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LABORATORY MEASUREMENTS OF THE K-SHELL TRANSITION ENERGIES IN L-SHELL IONS OF SI AND S by Hell, N., Brown, G. V., Wilms, J., Grinberg, V., Clementson, J., Liedahl, D., Porter, F. S., Kelley, R. L., Kilbourne, C. A., Beiersdorfer, P.

“…ABSTRACT We have measured the energies of the strongest 1s-2 transitions in He- through Ne-like silicon and sulfur ions to an accuracy of using the Lawrence…”
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High resolution X-ray spectroscopy of Supergiant HMXB 4U1700−37 during the compact object eclipse by Martínez-Chicharro, M, Grinberg, V, Torrejón, J M, Schulz, N, Oskinova, L, Nowak, M, Fürst, F, Hell, N, Hainich, R

“…Abstract We present an analysis of the first observation of the iconic High Mass X-ray Binary 4U 1700−37 with the Chandra High Energy Transmission Gratings…”
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X-ray resonant photoexcitation: linewidths and energies of Kα transitions in highly charged Fe ions by Rudolph, J K, Bernitt, S, Epp, S W, Steinbrügge, R, Beilmann, C, Brown, G V, Eberle, S, Graf, A, Harman, Z, Hell, N, Leutenegger, M, Müller, A, Schlage, K, Wille, H-C, Yavaş, H, Ullrich, J, Crespo López-Urrutia, J R

“…Photoabsorption by and fluorescence of the Kα transitions in highly charged iron ions are essential mechanisms for x-ray radiation transfer in astrophysical…”
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An unexpectedly low oscillator strength as the origin of the Fe xvii emission problem by Bernitt, S., Brown, G. V., Rudolph, J. K., Steinbrügge, R., Graf, A., Leutenegger, M., Epp, S. W., Eberle, S., Kubiček, K., Mäckel, V., Simon, M. C., Träbert, E., Magee, E. W., Beilmann, C., Hell, N., Schippers, S., Müller, A., Kahn, S. M., Surzhykov, A., Harman, Z., Keitel, C. H., Clementson, J., Porter, F. S., Schlotter, W., Turner, J. J., Ullrich, J., Beiersdorfer, P., López-Urrutia, J. R. Crespo

“…Fluorescence of iron ions induced by an X-ray laser allows the relative oscillator strength for Fe xvii emission to be determined; it is found to differ by 3.6…”
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DENSITY DETERMINATIONS OF THE CORONAE OF COOL STARS USING A NEWLY ASSIGNED PAIR OF Fe xiv LINES IN THE SPECTRA OF α CANIS MINOR, α CENTAURI, AND THE SUN by Beiersdorfer, P, Hell, N, Lepson, J K, Di'az, F, Ishikawa, Y

“…We have identified a previously unassigned pair of lines between 169 and 170 [Angstrom] in the coronae of cool stars. We attribute these lines to Fe xiv and…”
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A new benchmark of soft X-ray transition energies of Ne, CO2, and SF6: paving a pathway towards ppm accuracy by Stierhof, J., Kühn, S., Winter, M., Micke, P., Steinbrügge, R., Shah, C., Hell, N., Bissinger, M., Hirsch, M., Ballhausen, R., Lang, M., Gräfe, C., Wipf, S., Cumbee, R., Betancourt-Martinez, G. L., Park, S., Niskanen, J., Chung, M., Porter, F. S., Stöhlker, T., Pfeifer, T., Brown, G. V., Bernitt, S., Hansmann, P., Wilms, J., Crespo López-Urrutia, J. R., Leutenegger, M. A.

“…A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and precision. We…”
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A new benchmark of soft X-ray transition energies of Ne , CO 2 , and SF 6 : paving a pathway towards ppm accuracy by Stierhof, J, Kühn, S, Winter, M, Micke, P, Steinbrügge, R, Shah, C, Hell, N, Bissinger, M, Hirsch, M, Ballhausen, R, Lang, M, Gräfe, C, Wipf, S, Cumbee, R, Betancourt-Martinez, G L, Park, S, Niskanen, J, Chung, M, Porter, F S, Stöhlker, T, Pfeifer, T, Brown, G V, Bernitt, S, Hansmann, P, Wilms, J, Crepso López-Urrutia, J R, Leutenegger, M A

“…A key requirement for the correct interpretation of high-resolution X-ray spectra is that transition energies are known with high accuracy and precision. We…”
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High-Precision Determination of Oxygen K_{α} Transition Energy Excludes Incongruent Motion of Interstellar Oxygen by Leutenegger, M A, Kühn, S, Micke, P, Steinbrügge, R, Stierhof, J, Shah, C, Hell, N, Bissinger, M, Hirsch, M, Ballhausen, R, Lang, M, Gräfe, C, Wipf, S, Cumbee, R, Betancourt-Martinez, G L, Park, S, Yerokhin, V A, Surzhykov, A, Stolte, W C, Niskanen, J, Chung, M, Porter, F S, Stöhlker, T, Pfeifer, T, Wilms, J, Brown, G V, Crespo López-Urrutia, J R, Bernitt, S

“…We demonstrate a widely applicable technique to absolutely calibrate the energy scale of x-ray spectra with experimentally well-known and accurately calculable…”
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Correction to: A new benchmark of soft X-ray transition energies of Ne, CO2, and SF6: paving a pathway towards ppm accuracy by Stierhof, J., Kühn, S., Winter, M., Micke, P., Steinbrügge, R., Shah, C., Hell, N., Bissinger, M., Hirsch, M., Ballhausen, R., Lang, M., Gräfe, C., Wipf, S., Cumbee, R., Betancourt-Martinez, G. L., Park, S., Niskanen, J., Chung, M., Porter, F. S., Stöhlker, T., Pfeifer, T., Brown, G. V., Bernitt, S., Hansmann, P., Wilms, J., Crespo López-Urrutia, J. R., Leutenegger, M. A.

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Studies of highly charged iron ions using electron beam ion traps for interpreting astrophysical spectra by Brown, G V, Beilmann, C, Bernitt, S, Clementson, J, Eberle, S, Epp, S W, Graf, A, Hell, N, Kelley, R L, Kilbourne, C A, Kubi ek, K, Leutenegger, M A, Mäckel, V, Porter, F S, Rudolph, J K, Simon, M C, Steinbrügge, R, Träbert, E, Ullrich, J, Crespo López-Urrutia, J R, Beiersdorfer, P

“…For over a decade, the x-ray astrophysics community has enjoyed a fruitful epoch of discovery largely as a result of the successful launch and operation of the…”
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Areas suspicious for prostate cancer: MR-guided biopsy in patients with at least one transrectal US-guided biopsy with a negative finding-multiparametric MR imaging for detection and biopsy planning by Franiel, T, Stephan, C, Erbersdobler, A, Dietz, E, Maxeiner, A, Hell, N, Huppertz, A, Miller, K, Strecker, R, B, Hamm

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Pinealectomy causes glucose intolerance and decreases adipose cell responsiveness to insulin in rats by Lima, F B, Machado, U F, Bartol, I, Seraphim, P M, Sumida, D H, Moraes, S M, Hell, N S, Okamoto, M M, Saad, M J, Carvalho, C R, Cipolla-Neto, J

“…Although the pineal gland influences several physiological systems, only a few studies have investigated its role in the intermediary metabolism. In the…”
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Chronic Salt Overload Increases Blood Pressure and Improves Glucose Metabolism Without Changing Insulin Sensitivity by da Costa Lima, Nereida K., Lima, Fabio B., dos Santos, Elisabete A., Okamoto, Maristela M., Matsushita, Doris H., Hell, Naomi S., Heimann, Joel C.

“…The effect of sodium chloride salt restriction and overload on insulin sensitivity is still an open question.Some authors have shown that NaCl salt restriction…”
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K-shell X-ray transition energies of multi-electron ions of silicon and sulfur by Beiersdorfer, P., Brown, G.V., Hell, N., Santana, J.A.

“…Prompted by the detection of K-shell absorption or emission features in the spectra of plasma surrounding high mass X-ray binaries and black holes, recent…”
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High-Precision Determination of Oxygen K α Transition Energy Excludes Incongruent Motion of Interstellar Oxygen by Leutenegger, M. A., Kühn, S., Micke, P., Steinbrügge, R., Stierhof, J., Shah, C., Hell, N., Bissinger, M., Hirsch, M., Ballhausen, R., Lang, M., Gräfe, C., Wipf, S., Cumbee, R., Betancourt-Martinez, G. L., Park, S., Yerokhin, V. A., Surzhykov, A., Stolte, W. C., Niskanen, J., Chung, M., Porter, F. S., Stöhlker, T., Pfeifer, T., Wilms, J., Brown, G. V., Crespo López-Urrutia, J. R., Bernitt, S.

“…We demonstrate a widely applicable technique to absolutely calibrate the energy scale of x-ray spectra with experimentally well-known and accurately calculable…”
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High-Precision Determination of Oxygen-Kalpha Transition Energy Excludes Incongruent Motion of Interstellar Oxygen by Leutenegger, M A, Kuhn, S, Micke, P, Steinbrugge, R, Stierhof, Jakob, Shah, C, Hell, N, Bissinger, M, Hirsch, M, Lang, M, Grafe, C, Wipf, S, Cumbee, R, Betancourt-Martinez, G L, Park, S, Yerokhin, V A, Surzhykov, A S, Stolte, W C, Niskanen, J, Chung, M, Porter, F S, Stohlker, T, Pfeifer, T, Wilms, J, Brown, G V, Lopez-Urrutia, J R Crespo, Bernitt, S

“…We demonstrate a widely applicable technique to absolutely calibrate the energy scale of x-ray spectra with experimentally well-known and accurately calculable…”
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DENSITY DETERMINATIONS OF THE CORONAE OF COOL STARS USING A NEWLY ASSIGNED PAIR OF Fe xiv LINES IN THE SPECTRA OF α CANIS MINOR, α CENTAURI, AND THE SUN by Beiersdorfer, P., Hell, N., Lepson, J. K., Diaz, F., Ishikawa, Y.

“…We have identified a previously unassigned pair of lines between 169 and 170 Å in the coronae of cool stars. We attribute these lines to Fe xiv and show that…”
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