Inner-shell photodetachment from Fe{sup -}

Journal Article · Sat May 15 04:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.81.053404· OSTI ID:21408841

Dumitriu, I; Gorczyca, T W; Berrah, N ^[1]; Bilodeau, R C; Pesic, Z D; Rolles, D ^[1]; Walter, C W; Gibson, N D ^[2]; Aguilar, A ^[3]

---

1. Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008 (United States)
2. Department of Physics and Astronomy, Denison University, Granville, Ohio 43023 (United States)
3. Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)

Inner-shell photodetachment from Fe{sup -} was studied in the 48- to 72-eV photon energy range using a merged ion-photon-beam technique. The absolute photodetachment cross sections of Fe{sup -}, leading to Fe{sup +} and Fe{sup 2+} ion production, were measured. The 3p{yields}(3d+{epsilon}d) photoexcitation in Fe{sup -} negative ions gives rise to shape resonances. In the near-threshold region, shape-resonance profiles with l=2 accurately fit the single-photodetachment cross section. Simultaneous double photodetachment was also observed, resulting in an increased Fe{sup 2+} production which obeys a Wannier law. Despite the large number of possible terms resulting from the Fe{sup -} 3d open shell, a rough calculation using the R-matrix method qualitatively agrees well with the experimental data.

• OSTI ID: 21408841
• Journal Information: Physical Review. A, Journal Name: Physical Review. A Journal Issue: 5 Vol. 81; ISSN 1050-2947; ISSN PLRAAN
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANIONS
BEAMS
BOSONS
CHARGED PARTICLES
CROSS SECTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
EV RANGE
IONS
IRON IONS
MASSLESS PARTICLES
MATRICES
PHOTON BEAMS
PHOTONS
R MATRIX
RESONANCE