Spin conservation in single-electron capture by<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi mathvariant="normal">N</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:mrow></mml:math>in He, Ne, and Ar

Lee, A.R.; Wilkins, Adam C. R.; Enos, C.S.; Brenton, A.G.

doi:10.1103/physreva.48.2934

Cited by 13 publications

(5 citation statements)

References 18 publications

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“…still dominated by the G channels, also includes contributions from M1, M2, M3 and M4, corresponding to exothermic channels associated with N 2+ ( 4 P) metastable primary ions and M5 corresponding to an endothermic channel. This spectrum is consistent with the previous TES data of Lee al (1993) at 4 keV. It can be seen that while M4 and G3 overlap in the 'mixed-beam' spectrum, the true G3 contribution is provided by the DTES spectrum.…”

Section: One-electron Capture By N 2+ Ions In Collisions With Argonsupporting

confidence: 91%

“…This confirms the presence of significant contributions from M3, which increase in relative importance with increasing impact energy. The previous TES data obtained by Lennon et al (1983) in the range 0.8-8 keV, by Kamber et al (1984) at 6 keV and by Lee et al (1993) at 4 keV show the same general features as the present 'mixed-beam' spectra with the separate contributions from G3 and M3 unresolved.…”

Section: One-electron Capture In Collisions Of N 2+ Ions With Neonsupporting

confidence: 85%

“…The 'mixed-beam' energy change spectra, while also dominated by G1 and G2, show in addition the presence of the three exothermic channels M1, M2 and M3 associated with metastable N 2+ ( 4 P) primary ions; only the M2 channel is significant at 1.75 keV. These mixed-beam spectra exhibit the same features but are of generally better resolution than the spectra obtained previously by Lennon et al (1983) in the range 0.8-8.0 keV, Kamber et al (1984) at 6 keV, Rajgara et al (1988) at 3 keV and Lee et al (1993) at 4 keV. None of the TES measurements had an energy resolution adequate to distinguish between the channel M3 with E = 0.67 eV and a possible G4 product channel leading to N + 2s 2 2p 2 ( 1 S) + He + ( 2 S) + 0.96 eV.…”

Section: One-electron Capture In Collisions Of N 2+ Ions With Heliumsupporting

confidence: 54%

“…In the present work we have used the same experimental approach to study one-electron capture by pure beams of N 2+ 2s 2 2p( 2 P) ground-state ions in collisions with He, Ne and Ar at energies of 1.75, 4.0, 6.0 and 8.0 keV. Previous TES studies of these processes at overlapping energies by Lennon et al (1983) in this laboratory, by Kamber et al (1984), by Rajgara et al (1988) and by Lee et al (1993) were carried out with primary beams containing an unknown metastable N 2+ 2s2p 2 ( 4 P) ion content so that some features are difficult to interpret.…”

Section: Introductionmentioning

confidence: 99%

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State-selective one-electron capture by ground-state ions in slow collisions with He, Ne and Ar using double translational energy spectroscopy

Burns¹,

Thompson²,

Greenwood³

et al. 1997

J. Phys. B: At. Mol. Opt. Phys.

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Double translational energy spectroscopy (DTES) has been used to study stateselective one-electron capture by pure ground-state N 2+ 2s 2 2p( 2 P) ions in collisions with He, Ne and Ar at energies within the range 1.75-8.0 keV. The main collision channels have been identified and their relative importance has been assessed quantitatively. These measurements avoid the ambiguities inherent in the interpretation of previous TES measurements carried out using primary N 2+ ion beams containing unknown fractions of metastable N 2+ 2s2p 2 ( 4 P) ions. In the absence of any detailed theoretical studies, we have calculated Landau-Zener reaction windows for these processes and shown that they accommodate the observed collision channels with limited success.

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Section: One-electron Capture By N 2+ Ions In Collisions With Argonsupporting

confidence: 91%

Section: One-electron Capture In Collisions Of N 2+ Ions With Neonsupporting

confidence: 85%

Section: One-electron Capture In Collisions Of N 2+ Ions With Heliumsupporting

confidence: 54%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

State-selective one-electron capture by ground-state ions in slow collisions with He, Ne and Ar using double translational energy spectroscopy

Burns¹,

Thompson²,

Greenwood³

et al. 1997

J. Phys. B: At. Mol. Opt. Phys.

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show abstract

“…The experimental study of the electron-capture from the ground state of helium atoms by N 2+ (2p) 2 P o ions has received recently a lot of attention [36][37][38]. Four reaction channels and two entry channels are involved in the transfer mechanism : The results displayed in Fig.…”

Section: Wave Packet Dynamicsmentioning

confidence: 88%

Rate Coefficient Determination in Charge Transfer Reactions

Bacchus‐Montabonel

Baloïtcha

Desouter-Lecomte

et al. 2002

IJMS

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State‐selective single‐electron capture by Ar⁴⁺ in He, Ne and Ar

Lee

Wilkins

Brenton

1995

Rapid Comm Mass Spectrometry

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Translational energy spectra have been obtained for single-electron capture by 8 keV Ar4+ ions in He, Ne and Ar. The spectra for He and Ne targets display eight well-resolved peaks, the majority of which correspond to capture involving a rearrangement of the electron core configuration. By contrast, the five channels observed in the spectrum for the Ar target are all associated with core-conserved electron-capture processes. One pronounced peak in the spectra for He and Ne cannot be explained on the basis of capture from the ground 'P or metastable 'D and 'S states of the Ar4+ ions, and appears to originate from capture by Ar4+ in the hitherto unidentified metastable %'-state at -7.5 eV above the ground state. All observed channels are spin-conserved.Charge-transfer processes involving multiply charged ions play an important role in diverse fields of physics, including thermonuclear fusion and astrophysical research, as well as in the design of XUV lasers. Translational energy spectroscopy is an invaluable tool in helping to identify state-selective channels, crucial for the proper understanding of curve-crossing mechanisms and plasma diagnostics. Unambiguous identification of the relevant reaction channels is often complicated by the presence of metastable states in the primary ion beam, and by the multiplicity and closeness of energy-separation of the prospective exit channels. This is exemplified by capture into high excited states of the product incident ion, as in the case of capture by Ar4+ in Ar, but guided by spin consideration^,'-^ our relatively unclustered spectrum is more amenable to confident identification than expected.There is a paucity of translational energy data for single-electron capture by Ar4+ ions, but capture by Ar4+ in He is included in a recent study by McCullough et a1.4 on state-selective capture by Ar4+, A?+ and Arb+ in H , H, and He, and in a general study on the translational energy spectroscopy of Arq+ (q = 1 to 4) ions carried out in this laboratory (see Hamdan et d 5 ) . In our present investigation, we have obtained high resolution spectra for single-electron capture by 8 keV Ar4+ in He, Ne and Ar. We are not aware of other existing high-resolution data for Ne and Ar targets.The Ar4+ ion has a 3P ground-state, and low-lying metastable singlet 'D and 'S states which are known5 to populate the incident ion beam in our collision region. All these states participate in electron-capture processes. The Ar3+ ion has a doublet-quartet system. Accordingly, all capture channels for Ar4+ + Ar3+ originating from the 3P-state of Ar4+ are spin-conserved, whereas only the doublet-states of Ar3+ are accessible from electron capture by the metastable singlet 'D and 'S states of Ar4+ if spin-conservation is strictly observed. All identified capture channels in our three spectra conform to this requirement.There are seven well-defined capture channels observed in each of the spectra for Ar4+ in He and Ne involving capture from the 3P, 'D and 'S states of Ar4+. Six of these transitions result in a...

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Spin conservation in single-electron capture byN2+in He, Ne, and Ar

Cited by 13 publications

References 18 publications

State-selective one-electron capture by ground-state ions in slow collisions with He, Ne and Ar using double translational energy spectroscopy

State-selective one-electron capture by ground-state ions in slow collisions with He, Ne and Ar using double translational energy spectroscopy

Rate Coefficient Determination in Charge Transfer Reactions

State‐selective single‐electron capture by Ar⁴⁺ in He, Ne and Ar

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Spin conservation in single-electron capture byN2+in He, Ne, and Ar

Cited by 13 publications

References 18 publications

State-selective one-electron capture by ground-state ions in slow collisions with He, Ne and Ar using double translational energy spectroscopy

State-selective one-electron capture by ground-state ions in slow collisions with He, Ne and Ar using double translational energy spectroscopy

Rate Coefficient Determination in Charge Transfer Reactions

State‐selective single‐electron capture by Ar4+ in He, Ne and Ar

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Product

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State‐selective single‐electron capture by Ar⁴⁺ in He, Ne and Ar