scholarly journals Efficient, high-resolution resonance laser ionization spectroscopy using weak transitions to long-lived excited states

2017 ◽  
Vol 95 (3) ◽  
Author(s):  
R. P. de Groote ◽  
M. Verlinde ◽  
V. Sonnenschein ◽  
K. T. Flanagan ◽  
I. Moore ◽  
...  
Keyword(s):  
High Resolution ◽  
Excited States ◽  
Laser Ionization ◽  
Resonance Laser ◽  
Weak Transitions

Details of the structure of bound excitons and bound multiexciton complexes in Si

1977 ◽  
Vol 55 (17) ◽  
pp. 1463-1480 ◽  
Author(s):  
M. L. W. Thewalt
Keyword(s):  
High Resolution ◽  
Shell Model ◽  
Excited States ◽  
Photoluminescence Spectra ◽  
Luminescence Line ◽  
Donor And Acceptor

The high resolution photoluminescence spectra reported here reveal new details of the structure of both bound excitons and bound multiexciton complexes in donor and acceptor doped Si. The bound exciton and bound multiexciton complexes in Si containing P impurities are found to have excited states, as was postulated in a recent shell-model of the bound multiexciton complexes. Several new features of the luminescence due to bound excitons and bound multiexciton complexes in acceptor doped Si are also found to be in agreement with the shell-model. In contrast to previous studies, we find no reason to doubt the original bound multiexciton complex explanation of the luminescence line series which are seen in lightly doped Si. The implications of these results are also discussed in relation to previously reported interpretations of the photoluminescence spectra of donor-doped Ge.

Absorption spectrum of the NO molecule. VIII. The heterogeneous (2Σ–2Π) interactions between excited states

1968 ◽  
Vol 46 (8) ◽  
pp. 987-1003 ◽  
Author(s):  
Ch. Jungen ◽  
E. Miescher
Keyword(s):  
Absorption Spectrum ◽  
High Resolution ◽  
Excited States ◽  
Rydberg State ◽  
Vacuum Ultraviolet ◽  
Principal Quantum Number ◽  
Rydberg States ◽  
Infrared Emission ◽  
Strong Interactions ◽  
Rydberg Series

Heterogeneous perturbations 2E+ ~ 2Π of largely different magnitudes are observed with high resolution in the vacuum-ultraviolet absorption and in the infrared emission spectrum of the NO molecule. The rotational interactions between 2Σ+ Rydberg states and levels of the B2Π non-Rydberg state are shown to be "configurationally forbidden", but produced by the configuration interaction between the non-Rydberg levels and 2Π Rydberg states. The latter together with the 2Σ+ Rydberg states form p complexes. In this way the interactions display the l uncoupling in the complexes; they can be evaluated theoretically and can be analyzed fully. The cases of the strong interactions D2Σ+(v = 3) ~ B2Π(v = 16)and D2Σ+(v = 5) ~ B2Π(v = 21) and of the weaker D2Σ+(v = 1) ~ B2Π(v = 11), all three observed as perturbations in ε bands crossing 3 bands, are discussed in detail. It is further shown that perturbations between γ bands and β bands as well as perturbations between analogous bands of higher principal quantum number are absent, and thus the assignment of the A2Σ+ and E2Σ+ states to the s Rydberg series is confirmed.

scholarly journals Resonance laser ionization of atoms for nuclear physics

2012 ◽  
Vol 85 (5) ◽  
pp. 058104 ◽  
Author(s):  
V N Fedosseev ◽  
Yu Kudryavtsev ◽  
V I Mishin
Keyword(s):  
Nuclear Physics ◽  
Laser Ionization ◽  
Resonance Laser

The absorption and emission spectra of HD in the vacuum ultraviolet

1976 ◽  
Vol 54 (5) ◽  
pp. 525-567 ◽  
Author(s):  
I. Dabrowski ◽  
G. Herzberg
Keyword(s):  
Absorption Spectrum ◽  
Ab Initio ◽  
Excited States ◽  
Vacuum Ultraviolet ◽  
Emission Spectra ◽  
Dissociation Limit ◽  
Infinite Mass ◽  
Ab Initio Theory ◽  
Vibrational Constants ◽  
Weak Transitions

The absorption spectrum of HD has been studied under high resolution in the vacuum ultraviolet to 840 Å, the emission spectrum to 1000 Å. The analysis of the latter gives accurate rotational constants and vibrational intervals of the ground state right up to the dissociation limit. Comparing these experimental data with calculations from ab initio theory, agreement to the same extent as was previously found for H2 and D2 is obtained. Extrapolation of the obs. – calc. values from H2 and D2 to infinite mass yields agreement with the recently revised theoretical values to within less than 0.1 for v < 7 and less than 0.5 cm−1 for the whole range of observed v values. The deviations for finite mass (H2 and D2) are clearly due to the non-adiabatic corrections neglected in the ab initio calculations. The results for HD are not halfway between H2 and D2 but are closer to H2. This apparent anomaly can be quantitatively accounted for, on the basis of recent calculations of Wolniewicz, by the effect of additional nonadiabatic corrections caused by the excited Σu states which in HD, unlike H2 and D2, can interact with the ground state.The rotational and vibrational constants of the excited states B1Σu+, C1Πu, and B′1Σu+ show somewhat larger deviations from ab initio values ranging for v0v from 5 to 120 cm−1, just as for H2 and D2. The electronic isotope shift of HD lies approximately half-way between the values of H2 and D2 as expected. In addition to the B–X, C–X, and B′–X systems the absorption spectrum of HD, unlike that of H2 and D2, shows an extensive progression of weak transitions to the double minimum state EF1Σg+ and a few very weak transitions to the G1Σg+ and I1Πg states. For the EF state both levels in the outer minimum (F) and levels above the maximum are observed. The correlation of the six excited states B, C, B′, EF, G, and I to the two close-lying dissociation limits corresponding to H + D* and H* + D is briefly discussed.

High resolution Raman spectroscopy from vibrationally excited states populated by a stimulated Raman process: 2ν1−ν1 of CH412

1997 ◽  
Vol 107 (13) ◽  
pp. 4864-4874 ◽  
Author(s):  
R. Z. Martı́nez ◽  
D. Bermejo ◽  
J. Santos ◽  
J. P. Champion ◽  
J. C. Hilico
Keyword(s):  
Raman Spectroscopy ◽  
High Resolution ◽  
Excited States ◽  
Vibrationally Excited ◽  
Raman Process ◽  
Stimulated Raman

Even-parity auto-ionizing states of iridium I observed by resonance laser ionization spectroscopy

2002 ◽  
Vol 57 (1) ◽  
pp. 95-107 ◽  
Author(s):  
Vicky Philipsen ◽  
Jeroen Bastiaansen ◽  
Peter Lievens ◽  
Erno Vandeweert ◽  
Roger E. Silverans
Keyword(s):  
Laser Ionization ◽  
Resonance Laser
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