Direct determination of the ionization potential of CO by resonantly enhanced multiphoton ionization mass spectroscopy

Erman, P.; Karawajczyk, A.; Rachlew-Källne, E.; Strömholm, C.; Larsson, Jörgen; Persson, Anders; Zerne, R

doi:10.1016/0009-2614(93)89283-n

Cited by 80 publications

(58 citation statements)

References 9 publications

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“…The ionization potential (I.P.) of CO has recently been established by resonant enhanced multiphoton ionization spectroscopy to 113 031.3 + 2.2 cm -~ [ 13]. This is in close agreement with an estimate obtained by extrapolation of Rydberg series yielding 113029 +_ 2 cm-~ [9].…”

Section: 1t the Excitation Region 700-900amentioning

confidence: 64%

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Synchrotron radiation induced photoionization and photodissociation of carbon monoxide in the 14–35 eV region

Erman

Rachlew-Källne

Sorensen

1994

Z Phys D - Atoms, Molecules and Clusters

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Abstract. Carbon monoxide has been excited with monochromatic synchrotron radiation in the 14-35 eV range using the Swedish synchrotron facility MAX in Lund. The decay products were studied in various detection channels such as formed CO + and C + ions using mass spectroscopy and visible or VUV fluorescence using photon detection. A rich line structure is observed which is attributed to CO Rydberg series converging to the X, A, B, D, C and E states in CO +. While a great number of these lines are already known, some of them are classified here for the first time. The combination of information from the fluorescence spectra and the mass spectra contribute important information concerning the autoionization and predissociation of these various Rydberg series. 33.20.N; 33.80.E; 33.80.G have not been firmly established until recently. Thus, it is tempting to look fo r Rydberg series converging to these doubly excited states in various detection channels. Moreover, the lower Rydberg series converging to the X, A and B states of CO ÷ are very complex and fluorescence measurements could, hopefully, give additional information concerning their decay channels. To our knowledge such fluorescence studies using a continuous excitation have only been performed for emission wavelengths larger than 2100 A [3][4][5]. PACS:Since the notations of the doubly excited states in CO + vary in different papers, Table 1 shows the notations used in the present work together with very recently established level energies from photoelectron spectroscopy [6]. These notations have been introduced by some authors to make an analogy to the isoelectronic case of N~.

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Section: 1t the Excitation Region 700-900amentioning

confidence: 64%

“…but it appears thanks to the presence of the electrostatic extraction field which is used to pull the ions into the QMS. More specifically this field is measured to be about 1.7 V/cm [13] which should lower the I.P. to 884.79 ~ i.e.…”

Section: 1t the Excitation Region 700-900amentioning

confidence: 99%

Synchrotron radiation induced photoionization and photodissociation of carbon monoxide in the 14–35 eV region

Erman

Rachlew-Källne

Sorensen

1994

Z Phys D - Atoms, Molecules and Clusters

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“…The calculated IPs and DIEs of atoms ͑Be, Mg, and Ca͒ and molecules ͑Li 2 , Na 2 , and K 2 ͒ are presented in Table I together with available experimental data. 33,34 On the other hand, the agreement between the GWA and the experiments is good ͑the values for Li 2 , Na 2 , and K 2 are already given in Ref. In the column "first ionization potential," the IP is evaluated either in the LDA or in the GWA.…”

Section: A Two-valence-electron Systemsmentioning

confidence: 73%

First-principles T-matrix calculations of double-ionization energy spectra of atoms and molecules

Noguchi

Kudo

Ishii

et al. 2005

The Journal of Chemical Physics

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Strong electron correlation plays an important role in the determination of double ionization energy, which is required for removing or adding two electrons, particularly in small-sized systems. Starting from the state-of-the-art GW approximation, we evaluate the particle-particle ladder diagrams up to the infinite order by solving the Bethe-Salpeter equation of the T-matrix theory to calculate the double-ionization energy spectra of atoms and molecules (Be, Mg, Ca, Ne, Ar, Kr, CO, C(2)H(2), Li(2), Na(2), and K(2)) from first principles. The ladder diagrams up to the infinite order are significant to calculations of double-ionization energy spectra. The present results are in good agreement with available experimental data as well as the previous calculations using, e.g., the configuration-interaction method.

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“…14͒ and the latter process has an ionization energy of 14 eV. 15 CO + can be destroyed in collisions with the most abundant species in PDRs, i.e., H atoms, H 2 , and electrons. 16 Therefore it seems unlikely that CO + will reach thermal equilibrium through collisional processes.…”

Section: Introductionmentioning

confidence: 99%

The dynamics of the H2+CO+ reaction on an interpolated potential energy surface

Ramazani

Frankcombe

Andersson

et al. 2009

The Journal of Chemical Physics

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A potential energy surface that describes the title reaction has been constructed by interpolation of ab initio data. Classical trajectory studies on this surface show that the total reaction rate is close to that predicted by a Langevin model, although the mechanism is more complicated than simple ion-molecule capture. Only the HCO(+) + H product is observed classically. An estimate of the magnitude of rotational inelastic scattering is also reported.

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Direct determination of the ionization potential of CO by resonantly enhanced multiphoton ionization mass spectroscopy

Cited by 80 publications

References 9 publications

Synchrotron radiation induced photoionization and photodissociation of carbon monoxide in the 14–35 eV region

Synchrotron radiation induced photoionization and photodissociation of carbon monoxide in the 14–35 eV region

First-principles T-matrix calculations of double-ionization energy spectra of atoms and molecules

The dynamics of the H2+CO+ reaction on an interpolated potential energy surface

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