arXiv subjects

H. Gordon Berry

Publications and source records attributed to H. Gordon Berry.

3 recordsLinked to original sources

arXiv2004

Beam-foil Spectroscopy of the 1s2s2p23p 6L-1s2p33p 6P Transitions in O IV, F V and Ne VI

We present observations of VUV transitions between doubly excited sextet states in O IV, F V and Ne VI. Spectra were produced by collisions of an O+, (FH)+ and Ne+ beam with a solid carbon target. Some observed lines are assigned to the 1s2s2p23p 6L-1s2p33p 6P electric-dipole transitions in O IV, F V and Ne VI, and are compared with results of MCHF (with QED and higher-order corrections) and MCDF calculations. 31 new lines have been identified. The sextet systems of boronlike ions are possible candidates for x-ray and VUV lasers.

physics.atom-ph↗

arXiv2004

1s2s2p23d 6L - 1s2p33d 6D, L=F, D, P Transitions in O IV, F V and Ne VI

We present observations of VUV transitions between doubly excited sextet states in O IV, F V and Ne VI. Spectra were produced by collisions of an O+ beam with a solid carbon target. We also studied spectra obtained previously of F V and Ne VI. Some observed lines were assigned to the 1s2s2p23d 6L - 1s2p33d 6D, L=F, D, P electric-dipole transitions, and compared with results of MCHF (with QED and higher-order corrections) and MCDF calculations. 42 new lines have been identified. Highly excited sextet states in five-electron ions provide a new form of energy storage and are possible candidates for VUV and x-ray lasers.

physics.atom-ph↗

arXiv2004

Beam-gas Spectroscopy of Sextet Transitions in O3+, F4+ and Ne5+

We present VUV observations of transitions between doubly excited sextet states in O3+, F4+ and Ne5+. Spectra were produced by collisions of an oxygen, uorine and neon beam with a nitrogen gas jet target. Prepared beam-gas experiment yields new and explicit information on doubly core-excited ions. Some observed lines were assigned to the 1s2s2p3 6S-1s2p33s, 3d 6P electric-dipole transitions in O3+, F4+ and Ne5+. Three lines have been reassigned. Present data are the first explicit measurements on transitions between sextet states in boronlike ions by beam-gas spectroscopy.

physics.atom-ph↗