<i>L</i>shell photoabsorption spectroscopy for solid metals: Ti, V, Cr, Fe, Ni, Cu

Grande, N.K. Del

doi:10.1088/0031-8949/41/1/027

Cited by 19 publications

(7 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Below 900 eV photon energy, the emission is relatively smooth, while line features become apparent above 900 eV. 10 and has been measured in other recent Cu filter calibration. Overall, the emission is very repeatable with two shots matched within 3% in intensity and the third shot is lower by 17%.…”

Section: Experimental Descriptionsupporting

confidence: 59%

Design and measurement of a Cu L-edge x-ray filter for free electron laser pumped x-ray laser experiments

Dunn

London

Cone

et al. 2010

Review of Scientific Instruments

View full text Add to dashboard Cite

An inner-shell photoionized x-ray laser pumped by the Linac Coherent Light Source (LCLS) free electron laser has been proposed recently. The measurement of the on-axis 849 eV Ne Kα laser and protection of the x-ray spectrometer from damage require attenuation of the 1 keV LCLS beam. An Al/Cu foil combination is well suited, serving as a low energy bandpass filter below the Cu L-edge at 933 eV. A high resolution grating spectrometer is used to measure the transmission of a candidate filter with an intense laser-produced x-ray backlighter developed at the Lawrence Livermore National Laboratory Jupiter Laser Facility Janus. The methodology and discussion of the observed fine structure above the Cu L-edge will be presented.

show abstract

Section: Experimental Descriptionsupporting

confidence: 59%

Design and measurement of a Cu L-edge x-ray filter for free electron laser pumped x-ray laser experiments

Dunn

London

Cone

et al. 2010

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

“…The white line appears to be less intense for Fe. Here we note that other photoabsorption cross section measurements available in the literature show a more intense white line at the Fe L 3 edge (del Grande, 1990;Lee et al, 2009). Yet, we prefer to use Sokaras et al's data here mainly because their mass absorption coefficient value at E x = 704.8 eV (the Fe La line energy) is 3510 cm 2 /g, which is in much better agreement with the measured values of 3350 cm 2 /g (Pouchou & Pichoir, 1988) and of 3639 cm 2 /g (Gopon et al, 2013), than the value of 5151 cm 2 /g obtained from Lee et al's data (we also note here that it was not possible to accurately extract numerical data from del Grande's article).…”

Section: Self-absorption Of Diagram Linessupporting

confidence: 53%

Electron Probe Microanalysis of Transition Metals using L lines: The Effect of Self-absorption

2021

View full text Add to dashboard Cite

Electron microprobe-based quantitative compositional measurement of first-row transition metals using their L $\alpha$ X-ray lines is hampered by, among other effects, self-absorption. This effect, which occurs when a broad X-ray line is located close to a broad absorption edge, is not accounted for by matrix corrections. To assess the error due to neglecting self-absorption, we calculate the L $\alpha$ X-ray intensity emitted from metallic Fe, Ni, Cu, and Zn targets, assuming a Lorentzian profile for the X-ray line and taking into account the energy dependence of the mass absorption coefficient near the absorption edge. We find that calculated X-ray intensities depart increasingly, for increasing electron beam energy, from those obtained assuming a narrow X-ray line and a single fixed absorption coefficient (conventional approach), with a maximum deviation of $\sim$ 15% for Ni and of $\sim$ 10% for Fe. In contrast, X-ray intensities calculated for metallic Zn and Cu do not differ significantly from those obtained using the conventional approach. The implications of these results for the analysis of transition-metal compounds by electron probe microanalysis as well as strategies to account for self-absorption effects are discussed.

show abstract

“…Sommerfeld (1920), Azároff (1963), Stern (1974)) and can be easily observed with high-resolution spectrometers (e.g. Faessler (1955), Lytle et al (1975), Del Grande (1986Grande ( , 1990). Above some thresholds, rather dramatic peaks can occur, due to atomic photoionization resonances.…”

Section: Atomic Photoeffect Cross Section σ Pe (Or τ )mentioning

confidence: 99%

Review and history of photon cross section calculations

Hubbell

2006

Phys. Med. Biol.

129

View full text Add to dashboard Cite

Photon (x-ray, gamma-ray, bremsstrahlung) mass attenuation coefficients, mu/rho, are among the most widely used physical parameters employed in medical diagnostic and therapy computations, as well as in diverse applications in other fields such as nuclear power plant shielding, health physics and industrial irradiation and monitoring, and in x-ray crystallography. This review traces the evolution of this data base from its empirical beginnings totally derived from measurements beginning in 1907 by Barkla and Sadler and continuing up through the 1935 Allen compilation (published virtually unchanged in all editions up through 1971-1972 of the Chemical Rubber Handbook), to the 1949 semi-empirical compilation of Victoreen, as our theoretical understanding of the constituent Compton scattering, photoabsorption and pair production interactions of photons with atoms became more quantitative. The 1950s saw the advent of completely theoretical (guided by available measured data) systematic compilations such as in the works of Davisson and Evans, and by White-Grodstein under the direction of Fano, using mostly theory developed in the 1930s (pre-World War II) by Sauter, Bethe, Heitler and others. Post-World War II new theoretical activity, and the introduction of the electronic automatic computer, led to the more extensive and more accurate compilations in the 1960s and 1970s by Storm and Israel, and by Berger and Hubbell. Today's mu/rho compilations by Cullen et al, by Seltzer, Berger and Hubbell, and by others, collectively spanning the ten decades of photon energy from 10 eV to 100 GeV, for all elements Z= 1 to 100, draw heavily on the 1970s shell-by-shell photoabsorption computations of Scofield, the 1960s coherent and incoherent scattering computations of Cromer et al, and the 1980 computations of electron-positron pair and triplet computations of Hubbell, Gimm and Øverbø, these names being representative of the vast legions of other researchers whose work fed into these computations.

show abstract

Lshell photoabsorption spectroscopy for solid metals: Ti, V, Cr, Fe, Ni, Cu

Cited by 19 publications

References 16 publications

Design and measurement of a Cu L-edge x-ray filter for free electron laser pumped x-ray laser experiments

Design and measurement of a Cu L-edge x-ray filter for free electron laser pumped x-ray laser experiments

Electron Probe Microanalysis of Transition Metals using L lines: The Effect of Self-absorption

Review and history of photon cross section calculations

Contact Info

Product

Resources

About