Measurement and calculation of L-shell transitions in M-shell iron ions

被引：16

作者：

Beiersdorfer, P. ^{[1
,2
,3
]}

Lepson, J. K. ^{[4
]}

Diaz, F. ^{[1
,2
]}

Ishikawa, Y. ^{[1
,2
]}

Traebert, E. ^{[3
]}

机构：

[1] Univ Puerto Rico, Dept Chem, San Juan, PR 00931 USA

[2] Univ Puerto Rico, Chem Phys Program, San Juan, PR 00931 USA

[3] Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94550 USA

[4] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

来源：

PHYSICA SCRIPTA | 2013年 / T156卷

关键词：

X-RAY; FE XVI; LABORATORY MEASUREMENTS; WAVELENGTHS; ANGSTROM; SPECTRA; LINES; TRAP;

D O I：

10.1088/0031-8949/2013/T156/014007

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have made high-resolution measurements of the iron L-shell emission near 15 angstrom using the EBIT-I electron beam ion trap at Livermore that exhibit L-shell transitions from autoionizing levels in Fe13+, Fe14+ and Fe15+ ions. The observed L-shell iron spectra were modeled using the flexible atomic code augmented with transition energies produced by calculations based on the relativistic multi-reference Moller-Plesset (MRMP) perturbation theory, allowing us to identify multiple M-shell iron lines. Our measured values for the Fe XV emission lines are in excellent agreement with a recent measurement using the BESSY-II synchrotron but the present measurements have somewhat higher accuracy. Our MRMP calculations are compared to earlier calculations using the many-body perturbation theory approach, and we find good agreement for some but not all transitions.

引用

页数：3

共 18 条

[1] Flat-field grating spectrometer for high-resolution soft x-ray and extreme ultraviolet measurements on an electron beam ion trap [J].

Beiersdorfer, P ;

Magee, EW ;

Träbert, E ;

Chen, H ;

Lepson, JK ;

Gu, MF ;

Schmidt, M .

REVIEW OF SCIENTIFIC INSTRUMENTS, 2004, 75 (10) :3723-3726

[2] THEORETICAL WAVELENGTHS OF Fe XVI L-SHELL TRANSITIONS AND COMPARISON WITH LABORATORY MEASUREMENTS AND CHANDRA OBSERVATIONS OF CAPELLA [J].

Beiersdorfer, P. ;

Diaz, F. ;

Ishikawa, Y. .

ASTROPHYSICAL JOURNAL, 2012, 745 (02)

[3] A "brief" history of spectroscopy on EBIT [J].

Beiersdorfer, Peter .

CANADIAN JOURNAL OF PHYSICS, 2008, 86 (01) :1-10

[4] Laboratory measurements and identification of the Fe XVIII-XXIV L-shell X-ray line emission [J].

Brown, GV ;

Beiersdorfer, P ;

Liedahl, DA ;

Widmann, K ;

Kahn, SM ;

Clothiaux, EJ .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2002, 140 (02) :589-607

[5] High resolution measurement of the K alpha spectrum of Fe xxv-xviii: New spectral diagnostics of nonequilibrium astrophysical plasmas [J].

Decaux, V ;

Beiersdorfer, P ;

Kahn, SM ;

Jacobs, VL .

ASTROPHYSICAL JOURNAL, 1997, 482 (02) :1076-1084

[6] HIGH-RESOLUTION MEASUREMENTS OF THE K-ALPHA SPECTRA OF LOW-IONIZATION SPECIES OF IRON - A NEW SPECTRAL SIGNATURE OF NONEQUILIBRIUM IONIZATION CONDITIONS IN YOUNG SUPERNOVA-REMNANTS [J].

DECAUX, V ;

BEIERSDORFER, P ;

OSTERHELD, A ;

CHEN, M ;

KAHN, SM .

ASTROPHYSICAL JOURNAL, 1995, 443 (01) :464-468

[7] STUDY OF OPEN-SHELL IONS IN AN ELECTRON-BEAM ION-TRAP [J].

DECAUX, V ;

BEIERSDORFER, P .

PHYSICA SCRIPTA, 1993, T47 :80-82

[8] HIGH-ACCURACY MR-MP PERTURBATION THEORY ENERGY AND RADIATIVE RATES CALCULATIONS FOR CORE-EXCITED TRANSITIONS IN Fe XVI [J].

Diaz, F. ;

Vilkas, M. J. ;

Ishikawa, Y. ;

Beiersdorfer, P. .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 2013, 207 (01)

[9] On photospheric fluorescence and the nature of the 17.62 Å feature in solar X-ray spectra [J].

Drake, JJ ;

Swartz, DA ;

Beiersdorfer, P ;

Brown, GV ;

Kahn, SM .

ASTROPHYSICAL JOURNAL, 1999, 521 (02) :839-843

[10] MEASUREMENT AND MODELING OF Na-LIKE Fe XVI INNER-SHELL SATELLITES BETWEEN 14.5 Å AND 18 Å [J].

Graf, A. ;

Beiersdorfer, P. ;

Brown, G. V. ;

Gu, M. F. .

ASTROPHYSICAL JOURNAL, 2009, 695 (02) :818-824

← 1 2 →