Shirzad Kalhori

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This paper presents the first dissociative recombination (DR) measurement of electrons with rotationally and vibrationally cold H3 + ions. A dc discharge pinhole supersonic jet source was developed and characterized using infrared cavity ringdown spectroscopy before installation on the CRYRING ion storage ring for the DR measurements. Rotational state(More)
The electromagnetic aspect of microwave dielectric heating is analyzed. It is concluded that a re-entrant cavity may supply high electric field component that is theoretically favorable efficient microwave absorption process in a small liquid or solid chemical sample. A re-entrant cavity has been designed using both finite difference time domain and finite(More)
The H3+ molecular ion plays a fundamental role in interstellar chemistry, as it initiates a network of chemical reactions that produce many molecules. In dense interstellar clouds, the H3+ abundance is understood using a simple chemical model, from which observations of H3+ yield valuable estimates of cloud path length, density and temperature. But(More)
*Department of Chemistry, University of California at Berkeley, Berkeley, California 94720, USA Department of Astronomy, University of California at Berkeley, Berkeley, California 94720, USA Gemini Observatory, 670 North A'ohoku Place, Hilo, Hawaii 96720, USA JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado(More)
Product branching ratios and thermal rate coefficients for the dissociative recombination of C3D(+)7 and C4D(+)9 have been measured in the ion storage ring CRYRING. The results for C3D(+)7 are believed to be slightly more accurate than those obtained earlier for C3H(+)7. Only the C-C bond breaking channels could be measured for C4D(+)9 and were found to be(More)
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We report the first observation of four-body breakup in electron dissociative recombination of a molecular ion: C2D+5. In an ion storage ring experiment, the branching ratio for the process C2D+5 + e(-)-->C2D2 + D + D + D was determined to be 13%. This means that three covalent chemical bonds are broken as a result of the action of a single electron. This(More)
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