Observation of resonance structure in the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">Na</mml:mi></mml:mrow><mml:mrow><mml:mi>−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>photodetachment cross section

Haeffler, Gunnar; Kiyan, Igor Yu.; Hanstorp, Dag; Davies, Ben; Pegg, D. J.

doi:10.1103/physreva.59.3655

Cited by 24 publications

(18 citation statements)

References 21 publications

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“…This is especially true for high-lying doubly excited states, where the effects of penetration and polarization of the core are smaller. Previous experimental work in the field includes studies of Li − [8,9], Na − [10], and K − [11].…”

Section: Introductionmentioning

confidence: 99%

Experimental studies of partial photodetachment cross sections in K−below the K(7 2P) threshold

et al. 2012

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A collinear beams apparatus has been used to determine photodetachment cross sections for K − in the photon energy range 4.250-4.360 eV. State-selective detection, utilizing a resonance ionization scheme, was applied to measure partial cross sections for those channels which leave the residual K atoms in the excited 7 2 S, 5 2 F , and 5 2 G states. The energy region studied encompassed the openings of the aforementioned channels, as well as the channel that leaves the K atom in the 7 2 P state. Two previously unobserved resonances were seen in all three partial cross sections between the K(5 2 G) and K(7 2 P ) thresholds. It is shown that a more reliable determination of resonance parameters can be made if the same resonances are observed in several channels. In the region below the K(5 2 F ) threshold, three previously observed resonances were investigated [Kiyan et al., Phys. Rev. Lett. 84, 5979 (2000)]. A greatly increased modulation of the signal was obtained by detecting in the K(7 2 S) channel instead of the K(5 2 S) channel used in the previous study. Furthermore, the shapes of the cross sections in the threshold regions are discussed. A detailed description of the apparatus and the experimental procedure employed is presented in the paper.

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Section: Introductionmentioning

confidence: 99%

Experimental studies of partial photodetachment cross sections in K−below the K(7 2P) threshold

et al. 2012

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“…Several members of an A ¼ þ1 series were observed. Haeffler et al (1999) used the Na(4s)+e À (kp) partial cross section to investigate 1 P o resonances associated with doubly excited states of Na À that lie just below the 4d and 4f thresholds of Na. The data was taken over the range 4.657-4.880 eV.…”

Section: Article In Pressmentioning

confidence: 99%

Photodetachment using atom and ion detection

Pegg

2004

Radiation Physics and Chemistry

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“…Previous experimental investigations of doubly excited states of alkali-metal negative ions include studies on Li − [12,13], Na − [14], K − [15,16], Rb − [17,18], and Cs − [17,19].…”

Section: Introductionmentioning

confidence: 99%

Observation of thresholds and overlapping resonances below the 102P1/2and2P
Lindahl
¹
,
Rohlén
²
,
Hultgren
³

et al. 2013
Phys. Rev. A
5
0
5
0
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A collinear beam apparatus has been used to study photodetachment of Cs − . Partial cross sections were measured using state-selective detection based on a resonance ionization scheme. Several resonances were observed in the Cs(10 2 S), Cs(6 2 F ), Cs(6 2 G), and Cs(6 2 H ) final-state channels below the Cs(10 2 P 3/2 ) channel opening. A model was developed to account for the interference between overlapping resonances. This model is essentially a generalization of the Fano [U. Fano, Phys. Rev. 124, 1866(1961] and Shore [ B. W. Shore, Phys. Rev. 171, 43 (1968)] parametrizations for single resonances. Resonance parameters were extracted by fitting the model to the data sets. The openings of the Cs(10 2 S) and Cs(6 2 F ) channels, where the polarizabilities of the atomic states are large and positive, showed rapid onsets. In the case of the Cs(6 2 G) and Cs(6 2 H ) channels, on the other hand, the photodetachment cross sections increased slowly with energy. For the Cs(6 2 H ) channel this is the expected behavior, since it is the result of a large and negative polarizability of the 6 2 H state. In addition, the excitation of the Cs(6 2 H ) state with respect to the Cs ground state was found to be 28 356.3(2) cm −1 , in agreement with a previous experiment.

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Observation of resonance structure in theNa−photodetachment cross section

Cited by 24 publications

References 21 publications

Experimental studies of partial photodetachment cross sections in K−below the K(7 2P) threshold

Experimental studies of partial photodetachment cross sections in K−below the K(7 2P) threshold

Photodetachment using atom and ion detection

Observation of thresholds and overlapping resonances below the 102P1/2and2P
Lindahl
¹
,
Rohlén
²
,
Hultgren
³

et al. 2013
Phys. Rev. A
5
0
5
0
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Observation of resonance structure in theNa−photodetachment cross section

Cited by 24 publications

References 21 publications

Experimental studies of partial photodetachment cross sections in K−below the K(7 2P) threshold

Experimental studies of partial photodetachment cross sections in K−below the K(7 2P) threshold

Photodetachment using atom and ion detection

Observation of thresholds and overlapping resonances below the 102P1/2and2PLindahl1, Rohlén2, Hultgren3 et al. 2013Phys. Rev. A5050View full textAdd to dashboardCite

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Observation of thresholds and overlapping resonances below the 102P1/2and2P
Lindahl
¹
,
Rohlén
²
,
Hultgren
³

et al. 2013
Phys. Rev. A
5
0
5
0
View full text Add to dashboard Cite