Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Peder Royen"'
Autor:
J. Gurell, Richard Blackwell-Whitehead, Sven Mannervik, Erik Bäckström, Lars-Olov Norlin, Peder Royen, Henrik Hartman, Hampus Nilsson
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 420:1636-1639
Parity forbidden radiative transitions from metastable levels are observed in spectra of low-density astrophysical plasmas. These lines are used as probes of the physical conditions, made possible due to the long lifetime of their upper level. In a j
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6ae0f70772f05f99f1ca232cd29b2a2f
https://doi.org/10.1111/j.1365-2966.2011.20152.x
https://doi.org/10.1111/j.1365-2966.2011.20152.x
Autor:
L. O. Norlin, J. Gurell, Hampus Nilsson, Henrik Hartman, Richard Blackwell-Whitehead, Sven Mannervik, Peder Royen, E. Backstrom
Publikováno v:
Astronomy & Astrophysics. 508:525-529
Accurate transition probabilities for forbidden lines are important diagnostic parameters for low-density astrophysical plasmas. In this paper we present experimental atomic data for forbidden [FeII] transitions that are observed as strong features i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::54474617ceaeaac815166ecfff2a0b11
https://doi.org/10.1051/0004-6361/200913233
https://doi.org/10.1051/0004-6361/200913233
Autor:
Pascal Quinet, Emile Biémont, Patrick Palmeri, A. Ellmann, Sven Mannervik, Peder Royen, D Rostohar, P. Lundin, P. Schef, Lars-Olov Norlin
Publikováno v:
The European Physical Journal D. 41:211-219
The difficulty associated with an accurate determination of transition rates for forbidden lines in lowly ionized heavy elements is illustrated in the case of Nd II. We have investigated the radiat ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e4f12a72df4c448ca9fd5664a2daa0c
https://doi.org/10.1140/epjd/e2006-00229-5
https://doi.org/10.1140/epjd/e2006-00229-5
Autor:
Lars-Olov Norlin, Hans Lundberg, D Rostohar, P. Lundin, P. Schef, A. Ellmann, Sven Mannervik, Henrik Hartman, Sveneric Johansson, Peder Royen
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 361:206-210
In the spectrum of an emission-line region ejected from the massive star Eta Carinae, called the strontium filament (SrF), forbidden lines from many elements, in particular [Sr II] and [Ti II], are observed. These lines are strong in this specific re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c282919ab119a6bae62398e6fdb4bfa9
https://doi.org/10.1111/j.1365-2966.2005.09157.x
https://doi.org/10.1111/j.1365-2966.2005.09157.x
Publikováno v:
Physica Scripta. :49-54
A laser probing technique for lifetime measurements of long-lived metastable levels has been developed at the ion storage ring CRYRING. The method has been in use for about eight years and it has been applied to various ions. Levels with radiative li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85e9201bc5946b8e70a3a6177c22dc78
https://doi.org/10.1088/0031-8949/2005/t119/009
https://doi.org/10.1088/0031-8949/2005/t119/009
Autor:
Emile Biémont, P. Lundin, Peder Royen, A. M. Derkatch, D Rostohar, Lars-Olov Norlin, P. Schef, Sven Mannervik
Publikováno v:
The European Physical Journal D - Atomic, Molecular and Optical Physics. 29:195-199
We report on a calculation of five lifetimes of metastable levels in Ar II, obtained with a relativistic Hartree-Fock method in which most of the intravalence correlation is represented within a configuration interaction scheme while core-valence cor
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::643238ea50753643186a78225eb7076f
https://doi.org/10.1140/epjd/e2004-00043-1
https://doi.org/10.1140/epjd/e2004-00043-1
Publikováno v:
Journal of Molecular Spectroscopy. 224:157-163
Stark measurements of the dipole moments in excited states of hafnium mono-sulfide, 180Hf32S, and hafnium mono-oxide, 180Hf16O, have been performed. The molecules were produced using a laser ablation source combined with a time-of-flight mass spectro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5fefd3f969eeb2e8bb644b7e19edc06d
https://doi.org/10.1016/j.jms.2004.01.010
https://doi.org/10.1016/j.jms.2004.01.010
Autor:
A. M. Derkatch, Janis Alnis, D Rostohar, Sune Svanberg, Lars-Olov Norlin, Peder Royen, P. Schef, Sven Mannervik, Gabriel Somesfalean
Publikováno v:
Physica Scripta. 69:98-103
Lifetime measurements of the metastable 3d D-2(3/2) level in singly charged calcium were performed using the newly developed violet diode laser operated in an external cavity arrangement. The laser was employed on stored ions at the CRYRING facility
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc92b41b32344abc5baa7fb9c8573bb6
https://doi.org/10.1238/physica.regular.069a00098
https://doi.org/10.1238/physica.regular.069a00098
Autor:
Peder Royen, Kjell Andersson, Henrik Hartman, Xavier Tordoir, LO Norlin, Sven Mannervik, A Derkatch, Andreas Schmitt, D Rostohar
Publikováno v:
Physica Scripta. 64:237-244
The radiative lifetimes of the metastable a 9DJ (J = 2-5) levels in Eu II have been measured by laser probing of a stored ion beam. The lifetimes of all four J levels are slightly above 1 s. A deviation from the expected energy dependence of the deca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01999b0e921f828cfd12ec363d89af73
https://doi.org/10.1238/physica.regular.064a00237
https://doi.org/10.1238/physica.regular.064a00237
Autor:
Sven Mannervik, A. M. Derkatch, Henrik Hartman, Peder Royen, LO Norlin, Andreas Schmitt, D Rostohar, Sveneric Johansson, Hans Lundberg
Publikováno v:
Physical Review Letters. 86:1466-1469
The lifetime of two metastable levels in Fe+ has been measured by laser probing of a stored ion beam. In the dense spectrum of Fe+, the metastable levels a 6S5/2 and b 4D7/2 were selected and their lifetimes were determined to be 230+/-30 and 530+/-3
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1dcf0944d4ada74e87e2f7c3fea1fa1d
https://doi.org/10.1103/physrevlett.86.1466
https://doi.org/10.1103/physrevlett.86.1466