Photodissociation dynamics of HN3. The N3 fragment internal energy distribution

Haas, Tobias; Gericke, Karl‐Heinz; Maul, C.; Comes, F. J.

doi:10.1016/0009-2614(93)85358-u

Cited by 37 publications

(31 citation statements)

References 21 publications

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“…A detailed description of the experimental set-up has been given elsewhere. 30 It consists of a home-built single-field time-of-flight (TOF) spectrometer with a length ratio of the acceleration to the drift region of 1:2 at a total length of 57 cm. The spectrometer was evacuated to a base pressure of 10 À4 Pa (10 À6 mbar) by a 360 l s À1 turbo molecular pump and two 500 l s À1 oil diffusion pumps (Leybold Baur 1).…”

Section: B Experimentalmentioning

confidence: 99%

Competitive channels in the photodissociation of thionyl chloride

Roth

Maul

Gericke

2002

Phys. Chem. Chem. Phys.

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The photodissociation dynamics of thionyl chloride are investigated by a one-dimensional resonance enhanced multi-photon/time-of-flight technique (REMPI/TOF) at a dissociation wavelength around 235 nm. Nascent sulfur monoxide molecules and chlorine atoms were detected state-specifically under collision-free conditions for parallel and perpendicular polarisation geometries. Dissociation and detection were performed using the same laser. Polarisation-dependent and state-specific TOF profiles were converted into kinetic energy distributions using a least squares fitting method taking into account velocity-dependent spatial fragment anisotropies. Kinetic energy distributions are narrow and structureless for SO and bimodal for both spin-orbit states of Cl. The bimodality reflects the competition between two-and three-body decay: SOCl 2 + hn ! SOCl + Cl and SOCl 2 + hn ! SO + 2 Cl. Chlorine atoms are preferentially released along the polarisation vector of the dissociation laser. The spatial distribution of Cl is characterised by an anisotropy parameter of 0.8 AE 0.2 for the two-body decay and 0.2 AE 0.2 for the three-body decay. SO molecules are isotropically released with low kinetic energy together with two ground state chlorine atoms. These products are most likely to be generated in a sequential three-body decay on a potential energy surface of A 0 symmetry. Another surface of A 00 symmetry instantaneously produces fast chlorine atoms in a two-body decay process to equal amounts in the ground and the excited spin-orbit states. The corresponding SOCl fragment carries about 50% of the available energy as internal energy.

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Section: B Experimentalmentioning

confidence: 99%

Competitive channels in the photodissociation of thionyl chloride

Roth

Maul

Gericke

2002

Phys. Chem. Chem. Phys.

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“…The REMPI experiments have been performed with pure NO at pressures about 5 · 10 18 O transitions have been observed further by LIF spectroscopy. The measuring chamber was filled with 2.5 ppm NO in N 2 (certified 2.5 vol.…”

Section: Resultsmentioning

confidence: 99%

“…A detailed description of the (1+1)-REMPI-TOF experimental setup can be found elsewhere [18]. The device consists of a home-built single-field TOF spectrometer with a total length of 0.57 m and a ratio of the acceleration region to the drift region of 1:2.…”

Section: Methodsmentioning

confidence: 99%

Laser-induced fluorescence spectroscopy of¹⁴N¹⁸O and its application to breath analysis

Mitscherling

Maul

Veselov

et al. 2009

Isotopes in Environmental and Health Studies

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Laser-induced fluorescence (LIF) spectroscopy is an efficient tool for the detection of low nitric oxide (NO) concentrations down to the parts per trillion (ppt) range. The isotopic selectivity of this method provides a broad potential of applications. . This transition has been used for an isotope specific online detection of 14 N 18 O from exhaled air. The detection limit for 14 N 18 O is 7.3 ± 1.8 ppt. With respect to 18 O-labelled drugs and amino acids this denotes a novel extension to NO research.

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“…At about 85°C, the only evolving gas is HN 3 , which is stored in a glass bulb at a maximum pressure of about 1 kPa (21). Alternatively, HN 3 can also be prepared by adding small amounts of phosphoric acid under vacuum to NaN 3 , which is much simpler to handle, but the generated HN 3 is less pure (22). The pressure in the glass bulb is monitored by a capacitance pressure transducer (MKS Baratron 221AHS-D-100).…”

Section: Introductionmentioning

confidence: 99%

Direct High-Resolution Determination of the Singlet–Triplet Splitting in NH Using Stimulated Emission Pumping

Rinnenthal

Gericke

1999

Journal of Molecular Spectroscopy

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Photodissociation dynamics of HN3. The N3 fragment internal energy distribution

Cited by 37 publications

References 21 publications

Competitive channels in the photodissociation of thionyl chloride

Competitive channels in the photodissociation of thionyl chloride

Laser-induced fluorescence spectroscopy of¹⁴N¹⁸O and its application to breath analysis

Direct High-Resolution Determination of the Singlet–Triplet Splitting in NH Using Stimulated Emission Pumping

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Photodissociation dynamics of HN3. The N3 fragment internal energy distribution

Cited by 37 publications

References 21 publications

Competitive channels in the photodissociation of thionyl chloride

Competitive channels in the photodissociation of thionyl chloride

Laser-induced fluorescence spectroscopy of14N18O and its application to breath analysis

Direct High-Resolution Determination of the Singlet–Triplet Splitting in NH Using Stimulated Emission Pumping

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Laser-induced fluorescence spectroscopy of¹⁴N¹⁸O and its application to breath analysis