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K-shell photoionization of ground-state Li-like boron ions [B$^{2+}$]: Experiment and Theory
- Source :
- J. Phys. B: At. Mol. Opt. Phys. 43 (2010) 135602
- Publication Year :
- 2012
-
Abstract
- Absolute cross sections for the K-shell photoionization of ground-state Li-like boron [B$^{2+}$(1s$^2$2s $^2$S)] ions were measured by employing the ion-photon merged-beams technique at the Advanced Light Source synchrotron radiation facility. The energy ranges 197.5--200.5 eV, 201.9--202.1 eV of the [1s(2s\,2p)$^3$P]$^2$P${\rm ^o}$ and [1s(2s\,2p)$^1$P] $^2$P${\rm ^o}$ resonances, respectively, were investigated using resolving powers of up to 17\,600. The energy range of the experiments was extended to about 238.2 eV yielding energies of the most prominent [1s(2$\ell$\,n$\ell^{\prime}$)]$^2$P$^o$ resonances with an absolute accuracy of the order of 130 ppm. The natural linewidths of the [1s(2s\,2p)$^3$P] $^2$P${\rm ^o}$ and [1s(2s\,2p)$^1$P] $^2$P${\rm ^o}$ resonances were measured to be $4.8 \pm 0.6$ meV and $29.7 \pm 2.5$ meV, respectively, which compare favourably with theoretical results of 4.40 meV and 30.53 meV determined using an intermediate coupling R-matrix method.<br />Comment: 6 figures and 2 tables
- Subjects :
- Astrophysics - Earth and Planetary Astrophysics
Subjects
Details
- Database :
- arXiv
- Journal :
- J. Phys. B: At. Mol. Opt. Phys. 43 (2010) 135602
- Publication Type :
- Report
- Accession number :
- edsarx.1203.5375
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/0953-4075/43/13/135602