TY - JOUR
T1 - Comprehensive Laboratory Measurements Resolving the LMM Dielectronic Recombination Satellite Lines in Ne-like Fe xvii Ions
AU - Grilo, Filipe
AU - Shah, Chintan
AU - Kühn, Steffen
AU - Steinbrügge, René
AU - Fujii, Keisuke
AU - Marques, José
AU - Feng Gu, Ming
AU - Paulo Santos, José
AU - Crespo López-Urrutia, José R.
AU - Amaro, Pedro
N1 - info:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F92329%2F2013/PT#
F. G and P.A. acknowledge support from Fundacao para a Ciencia e Tecnologia, Portugal, under grant No. UID/FIS/04559/2020 (LIBPhys) and under contracts UI/BD/151000/2021.
C.S. acknowledges support from an appointment to the NASA Postdoctoral Program at the NASA Goddard Space Flight Center, administered by the Universities Space Research Association under a contract with NASA, by Deutsche Forschungsgemeinschaft project No. 266229290, and by Max-Planck-Gesellschaft. We also thank Dr. Stefan Schippers for providing the raw data of Fe XVII DR rates measured at the TSR in Heidelberg, Germany.
PY - 2021/6/1
Y1 - 2021/6/1
N2 - We investigated experimentally and theoretically dielectronic recombination (DR) populating doubly excited configurations 3l3l prime (LMM) in Fe xvii, the strongest channel for soft X-ray line formation in this ubiquitous species. We used two different electron beam ion traps and two complementary measurement schemes for preparing the Fe xvii samples and evaluating their purity, observing negligible contamination effects. This allowed us to diagnose the electron density in both EBITs. We compared our experimental resonant energies and strengths with those of previous independent work at a storage ring as well as those of configuration interaction, multiconfiguration Dirac-Fock calculations, and many-body perturbation theory. This last approach showed outstanding predictive power in the comparison with the combined independent experimental results. From these we also inferred DR rate coefficients, unveiling discrepancies from those compiled in the OPEN-ADAS and AtomDB databases.
AB - We investigated experimentally and theoretically dielectronic recombination (DR) populating doubly excited configurations 3l3l prime (LMM) in Fe xvii, the strongest channel for soft X-ray line formation in this ubiquitous species. We used two different electron beam ion traps and two complementary measurement schemes for preparing the Fe xvii samples and evaluating their purity, observing negligible contamination effects. This allowed us to diagnose the electron density in both EBITs. We compared our experimental resonant energies and strengths with those of previous independent work at a storage ring as well as those of configuration interaction, multiconfiguration Dirac-Fock calculations, and many-body perturbation theory. This last approach showed outstanding predictive power in the comparison with the combined independent experimental results. From these we also inferred DR rate coefficients, unveiling discrepancies from those compiled in the OPEN-ADAS and AtomDB databases.
UR - http://www.scopus.com/inward/record.url?scp=85108095556&partnerID=8YFLogxK
U2 - 10.3847/1538-4357/abf737
DO - 10.3847/1538-4357/abf737
M3 - Article
AN - SCOPUS:85108095556
SN - 0004-637X
VL - 913
JO - The Astrophysical Journal
JF - The Astrophysical Journal
IS - 2
M1 - 140
ER -