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Akademický článek

Production of Resistors by Arc Plasma Spraying

Autor: J. C. Anderson, R. T. Smyth

Publikováno v: Active and Passive Electronic Components, Vol 2, Iss 2, Pp 135-145 (1975)

Externí odkaz: https://doaj.org/article/4e3f341891734dbdab324b48931c2872

PAMOP2: State-of-the-Art Computations for Atomic, Molecular and Optical Processes

Autor: Phillip C. Stancil, Connor Ballance, James Babb, Brendan M. McLaughlin, R. T. Smyth, Alfred Müller, M. S. Pindzola

Publikováno v: High Performance Computing in Science and Engineering '19 ISBN: 9783030667917

Our prime computational effort is to support current and future measurements of atomic photoionization cross-sections at various synchrotron radiation facilities, and ion-atom collision experiments, together with plasma, fusion and astrophysical appl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::feec4227256feda3cdb374319031f2fa
https://doi.org/10.1007/978-3-030-66792-4_3

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Quantitative comparison of opacities calculated using the $R$-matrix and Distorted-Wave methods: Fe XVII

Autor: N. R. Badnell, F Delahaye, R. T. Smyth, Connor Ballance

Publikováno v: Delahaye, F, Ballance, C P, Smyth, R T & Badnell, N R 2021, ' Quantitative comparison of opacities calculated using the R-matrix and Distorted-Wave methods: Fe XVII ', Monthly Notices of the Royal Astronomical Society, vol. 508, no. 1, pp. 421-432 . https://doi.org/10.1093/mnras/stab2016
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2021, 508 (1), pp.421-432. ⟨10.1093/mnras/stab2016⟩

We present here a detailed calculation of opacities for Fe~XVII at the physical conditions corresponding to the base of the Solar convection zone. Many ingredients are involved in the calculation of opacities. We review the impact of each ingredient

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::00bcb535e614c901a9543594baa15913

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Towards converged electron-impact excitation calculations of low-lying transitions in Fe ii

Autor: Connor Ballance, R. T. Smyth, Gary J. Ferland, Francis P. Keenan, Catherine Ramsbottom

Publikováno v: Smyth, R, Ramsbottom, C, Keenan, F, Ferland, G & Ballance, C 2019, ' Towards converged electron-impact excitation calculations of low-lying transitions in Fe II ', Monthly Notices of the Royal Astronomical Society, vol. 483, no. 1, pp. 654-663 . https://doi.org/10.1093/mnras/sty3198

Absorption and emission lines of the iron-peak species Fe II are prominent in the infrared, optical and ultraviolet spectra of a myriad of astrophysical sources, requiring extensive and highly reliable sets of atomic structure and collisional data fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::271b0268a4cf91a33d9b1192ecb6ff6b
https://doi.org/10.1093/mnras/sty3198

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Improved Fe II emission line models for AGN using new atomic datasets

Autor: Gary J. Ferland, Marios Chatzikos, Connor Ballance, A. Sarkar, Francis P. Keenan, P. A. M. van Hoof, R. T. Smyth, F. S. Guzmán, Catherine Ramsbottom

Understanding the Fe II emission from active galactic nuclei (AGNs) has been a grand challenge for many decades. The rewards from understanding the AGN spectra would be immense, involving both quasar classification schemes such as “Eigenvector 1”

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7fb9eda14740c0b236c2c2394aac50d5

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Advances in neutral tungsten ultraviolet spectroscopy for the potential benefit to gross erosion diagnosis

Autor: David Ennis, Gregory Hartwell, Ezekial A Unterberg, Cameron Samuell, R. T. Smyth, Stuart Loch, Tyler Abrams, Brian Victor, S.L. Allen, C.A. Johnson, David Maurer

A spectral survey of tungsten emission in the ultraviolet region has been completed in the DIII-D tokamak and the CTH torsatron to assess the potential benefit of UV emission for the diagnosis of gross W erosion. A total of 29 W I spectral lines are

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::37e5c56025d990759545b7a99bd25a59
http://arxiv.org/abs/1912.07723

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Radiative Association of Atomic and Ionic Carbon

Autor: R. T. Smyth, James Babb, Brendan M. McLaughlin

Publikováno v: Babb, J F, Smyth, R T & McLaughlin, B M 2019, ' Radiative Association of Atomic and Ionic Carbon ', The Astrophysical Journal, vol. 884, no. 2, 155 . https://doi.org/10.3847/1538-4357/ab43cb

We present calculated cross sections and rate coefficients for the formation of the dicarbon cation (C$_2^+$) by the radiative association process in collisions of a C$(^3P)$ atom and a C$^+(^2P^o)$ ion. Molecular structure calculations for a number

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a4e81ae538a07815094431599b3ee81
https://pure.qub.ac.uk/en/publications/radiative-association-of-atomic-and-ionic-carbon(3fbcc91a-11b2-4015-88d0-81cafef26848).html

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Level resolved photoionisation cross sections for Fe I

Autor: Catherine Ramsbottom, R. T. Smyth, Connor Ballance

Publikováno v: Smyth, R T, Ballance, C P & Ramsbottom, C A 2019, ' Level resolved photoionisation cross sections for Fe I ', The Astrophysical Journal, vol. 874, no. 2, 144 . https://doi.org/10.3847/1538-4357/ab0d25

Significant contributions to the UV opacity in the solar atmosphere have been found to stem from bound-free transitions in neutral iron. As such, accurate cross sections for the photoionisation process are required for a detailed and meaningful analy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::630dd357719163b879f7d31016c2142f
https://pure.qub.ac.uk/en/publications/level-resolved-photoionisation-cross-sections-for-fe-i(513b2ef4-9e86-4e9e-8fec-8bb5d9fbdeb8).html

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Dicarbon formation in collisions of two carbon atoms

Autor: Brendan M. McLaughlin, R. T. Smyth, James Babb

Publikováno v: Babb, J, Smyth, R & McLaughlin, B 2019, ' Dicarbon formation in collisions of two carbon atoms ', The Astrophysical Journal, vol. 876, no. 1 . https://doi.org/10.3847/1538-4357/ab1088

Radiative association cross sections and rates are computed, using a quantum approach, for the formation of C$_2$ molecules (dicarbon) during the collision of two ground state C($^3$P) atoms. We find that transitions originating in the C$\;^1\Pi_g$,

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7787bb29406beb79fa0043d858a3ca7b

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Spectroscopic diagnostics of low-ionized iron-peak elements. Electron-impact excitation of Ni$^{3+}$ and photoionisation of Ni$^{2+}$

Autor: L. Fernández-Menchero, Connor Ballance, R. T. Smyth, Catherine Ramsbottom

Publikováno v: Fernandez Menchero, L, Smyth, R, Ramsbottom, C & Ballance, C 2019, ' Spectroscopic diagnostics of low-ionized iron-peak elements: Electron-impact excitation of Ni3+ and photoionization of Ni2+. ', Monthly Notices of the Royal Astronomical Society, vol. 483, no. 2154, pp. 2154-2164 . https://doi.org/10.1093/mnras/sty3238

The spectra from Fe-peak elements may be used to determine the temperature and density of various astrophysical objects. Determination of these quantities is underpinned by the accuracy and the comprehensiveness of the underlying atomic structure and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd767e0f588b2336b6ccdb46c5a88890
http://arxiv.org/abs/1809.05472

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