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26 results on '"M. N. R. Ashfold"'

1. Airborne hydrogen cyanide measurements using a chemical ionisation mass spectrometer for the plume identification of biomass burning forest fires

Author

M. Le Breton, A. Bacak, J. B. A. Muller, S. J. O'Shea, P. Xiao, M. N. R. Ashfold, M. C. Cooke, R. Batt, D. E. Shallcross, D. E. Oram, G. Forster, S. J.-B. Bauguitte, P. I. Palmer, M. Parrington, A. C. Lewis, J. D. Lee, and C. J. Percival

Subjects
Physics, QC1-999, Chemistry, QD1-999
Abstract

A chemical ionisation mass spectrometer (CIMS) was developed for measuring hydrogen cyanide (HCN) from biomass burning events in Canada using I− reagent ions on board the FAAM BAe-146 research aircraft during the BORTAS campaign in 2011. The ionisation scheme enabled highly sensitive measurements at 1 Hz frequency through biomass burning plumes in the troposphere. A strong correlation between the HCN, carbon monoxide (CO) and acetonitrile (CH3CN) was observed, indicating the potential of HCN as a biomass burning (BB) marker. A plume was defined as being 6 standard deviations above background for the flights. This method was compared with a number of alternative plume-defining techniques employing CO and CH3CN measurements. The 6-sigma technique produced the highest R2 values for correlations with CO. A normalised excess mixing ratio (NEMR) of 3.68 ± 0.149 pptv ppbv−1 was calculated, which is within the range quoted in previous research (Hornbrook et al., 2011). The global tropospheric model STOCHEM-CRI incorporated both the observed ratio and extreme ratios derived from other studies to generate global emission totals of HCN via biomass burning. Using the ratio derived from this work, the emission total for HCN from BB was 0.92 Tg (N) yr−1.

Published
2013
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2. Corrigendum to 'Airborne hydrogen cyanide measurements using a chemical ionisation mass spectrometer for the plume identification of biomass burning forest fires' published in Atmos. Chem. Phys., 13, 9217–9232, 2013

Author

M. Le Breton, A. Bacak, J. B. A. Muller, S. J. O'Shea, P. Xiao, M. N. R. Ashfold, M. C. Cooke, R. Batt, D. E. Shallcross, D. E. Oram, G. Forster, S. J.-B. Bauguitte, P. I. Palmer, M. Parrington, A. C. Lewis, J. D. Lee, and C. J. Percival

Subjects
Physics, QC1-999, Chemistry, QD1-999
Abstract

No abstract available.

Published
2013
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3. Optical Emission from C

Author

E J D, Mahoney, B S, Truscott, M N R, Ashfold, and Yu A, Mankelevich

Abstract

Visible emission from C

Published
2017

4. General discussion

Author

J. C. Polanyi, D. M. Neumark, G. Schatz, D. G. Truhlar, J. J. Valentini, H. Taylor, G. G. Balint-Kurti, D. E. Manolopoulos, M. S. Child, J. Manz, C. Kubach, J. M. Bowman, A. Laganà, A. Aguilar, X. Gimenez, J. M. Lucas, R. N. Dixon, J. P. Simons, R. Schinke, G. Hancock, K. H. Gericke, M. N. R. Ashfold, L. Schnieder, K. H. Welge, M. Hippler, J. Pfab, A. E. Janza, W. Karrlein, K. Morokuma, M. H. Alexander, H. Metiu, K. Yamashita, F. Temps, A. W. Simpson, M. Brouard, J.-X. Wang, M. Henchman, B. Katz, P. Casavecchia, N. Balucani, L. Beneventi, D. Stranges, G. G. Volpi, J. C. Whitehead, V. Wei-Keh Wu, A. J. Orr-Ewing, B. Whitaker, J. G. Frey, M. Shapiro, H.-G. Rubahn, J. N. Murrell, W. C. Stwalley, R. Grice, B. Girard, N. Billy, G. Gouédard, J. Vigué, H.-J. Werner, A. J. McCaffery, M. R. Levy, and K. Burnett

Subjects
Chemistry, Chemical physics, Computational chemistry, Dynamics (mechanics), Structure (category theory), Transition state
Published
2016
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6. General Discussion

Author

J. M. Bowman, D. M. Neumark, R. Welsch, R. Wester, D. J. Nesbitt, S. E. Bradforth, M. N. R. Ashfold, S. H. Kable, D. Glowacki, D. G. Truhlar, N. Balucani, A. Lagana, T. J. Martinez, A. Wodtke, T. M. Bernhardt, A. J. Orr Ewing, D. W. Chandler, M. Gruebele, N. Huse, S. Harris, SKOUTERIS, Dimitrios, J. M., Bowman, D. M., Neumark, R., Welsch, R., Wester, D. J., Nesbitt, S. E., Bradforth, M. N. R., Ashfold, S. H., Kable, D., Glowacki, D. G., Truhlar, N., Balucani, A., Lagana, T. J., Martinez, A., Wodtke, T. M., Bernhardt, A. J., Orr Ewing, Skouteris, Dimitrio, D. W., Chandler, M., Gruebele, N., Huse, and S., Harris

Subjects
reaction dynamics, reaction dynamic, molecular collisions
Published
2012

7. General discussion

Author

I. W. M. Smith, J. J. Valentini, D. M. Neumark, M. N. R. Ashfold, M. González, F. Temps, A. Laganà, J. M. Alvariño, L. M. Quintales, J. C. Polanyi, R. Grice, D. G. Truhlar, K. G. McKendrick, F. J. Aoiz, R. S. Mackay, Q.-X. Xu, V. W.-K. Wu, D. C. Clary, B. Soep, G. Schatz, M. S. Child, M. Shapiro, A. H. Zewail, H. Metiu, J. M. C. Plane, G. Gerber, J. E. Combariza, J. Manz, G. K. Paramonov, S. Görtler, J. P. Simons, K. Morokuma, E. Kolba, R. Kosloff, F. Sondermann, V. J. Herrero, V. Sáez Rábanos, K. H. Welge, B. Girard, D. E. Manolopoulos, P. Casavecchia, N. Balucani, L. Beneventi, D. Stranges, G. G. Volpi, J. M. Bowman, R. A. Marcus, R. T. Pack, G. A. Parker, J. N. L. Connor, D. C. Chatfield, R. S. Friedman, Ms. G. C. Lynch, R. Foster, M. J. Frost, H. Hippler, A. Schlepegrell, J. Troe, K.-H. Gericke, M. H. Alexander, P. J. Dagdigian, S. G. Clement, J. D. Howe, C. M. Western, R. N. Dixon, and P. J. Sarre

Published
1991
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9. Resonance enhanced multiphoton ionization spectroscopy of the imidogen radical

Author

M. N. R. Ashfold, S. G. Clement, J. D. Howe, and C. M. Western

Abstract

New singlet and triplet Rydberg states of the imidogen radical in the energy range 10–12 eV (measured relative to the ground electronic state) have been identified via the two photon resonance enhancements they provide to the multiphoton ionization spectra of both NH and ND. Spectral assignment has been aided by measurements of (i) the fragmentation pattern of the resulting ions and (ii) the kinetic energies of the associated photoelectrons. Rotational analysis yields detailed spectroscopic constants for these various excited states and reveals a number of textbook examples of perturbations arising from two (and three) state interactions.

Published
1992
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13. Book reviews

Author

N. M. D. Brown, D. B. Sellen, C. D. Flint, A. A. Herod, G. Duxbury, D. A. Dunmur, and M. N. R. Ashfold

Subjects
Physical and Theoretical Chemistry
Published
1994
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14. Book reviews

Author

M. N. R. Ashfold, B. F. Gray, M. P. Allen, D. E. Parry, and D. Price

Subjects
Physical and Theoretical Chemistry
Published
1991
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15. Book reviews

Author

B. Vincent, G. Duxbury, F. R. Cruickshank, M. W. Roberts, N. D. Parkyns, R. K. Harris, J. E. Baggott, R. J. P. Williams, R. W. Joyner, D. A. Whan, M. N. R. Ashfold, I. Mills, R. P. Wayne, and P. Brint

Subjects
Physical and Theoretical Chemistry
Published
1990
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16. General discussion

Author

P. Botschwina, N. C. Handy, L. Halonen, J. F. Gaw, T. K. Ha, M. Lewerenz, M. Quack, N. Sheppard, J. L. Duncan, S. Brodersen, J. E. Baggott, D. W. Law, K. K. Lehmann, J. S. Hutchinson, M. Winnewisser, T. A. Holme, G. D. Carney, G. Duxbury, J. Tennyson, M. S. Child, A. V. Chambers, B. T. Sutcliffe, P. Jensen, R. Marquardt, D. A. Newnham, B. R. Henry, I. M. Mills, S. L. Coy, G. L. Caldow, A. M. Smith, R. Walsh, M. N. R. Ashfold, D. C. McKean, R. O. Watts, E. Carrasquillo, A. L. Utz, F. F. Crim, F. Temps, J. Santamaría, C. Getino-Gonzalez, J. P. Simons, A. García-Ayllón, and R. D. Levine

Published
1988
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17. General discussion

Author

P. B. Davies, K. M. Evenson, J. M. Brown, J. A. Coxon, S. C. Foster, J. M. Huston, C. J. Ashton, M. S. Child, Ph. Bréchignac, R. C. Woods, M. Winnewisser, M. Quack, S. Leach, T. A. Miller, E. Hirota, W. Urban, T. E. Gough, M. N. R. Ashfold, R. N. Dixon, G. Duxbury, R. Bacis, I. M. Mills, A. R. W. McKeller, R. W. Field, J. Winn, D. A. Ramsay, R. F. Barrow, D. L. Cooper, P. Gray, G. Herzberg, C. Cossart-Magos, J. H. D. Eland, J. P. Maier, D. Cossart, S. N. L. G. Krishnamachari, K. Evenson, M. A. A. Clyne, F. Engelke, H. Hage, C. D. Caldwell, and Ch. Jungen

Published
1981
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20. General discussion

Author

K. F. Freed, J. C. Polanyi, B. Koplitz, Z. Xu, D. Baugh, C. Wittig, M. Brouard, M. P. Docker, J. P. Simons, A. Hodgson, L. J. Dunne, J. N. Murrell, K. H. Welge, M. N. R. Ashfold, R. N. Dixon, M. Shapiro, R. Schinke, V. Engel, J. M. Hutson, J. Halpern, C. J. Williams, J. Pfab, M. R. S. McCoustra, M. S. Child, C. B. Moore, J. A. Dyet, C. X. W. Qian, H. Reisler, A. Ogai, M. Noble, P. L. Houston, H. Bitto, R. Marquardt, M. Quack, P. Rosmus, P. Botschwina, H-J. Werner, V. Vaida, M. McCarthy, P. Engelking, C. L. Bennett, F. G. Godwin, C. Paterson, P. A. Gorry, S. A. Rice, and H. J. Thöne

Published
1986

22. General discussion

Author

S. H. P. Bly, L. W. Dickson, Y. Nomura, J. C. Polanyi, I. W. M. Smith, P. N. Clough, M. Kneba, U. Wellhausen, J. Wolfrum, P. E. Siska, R. J. Wolf, C. S. Sloane, W. L. Hase, L. Holmlid, K. Rynefors, K. Luther, M. Quack, K. Freed, W. M. Jackson, R. Naaman, R. N. Zare, G. Hancock, R. Walsh, J. Troe, D. M. Lubman, G. Atkinson, D. W. Setser, M. R. Levy, M. Mangir, H. Reisler, M. H. Yu, C. Wittig, C. M. Miller, F. M. G. Tablas, M. N. R. Ashfold, A. J. Roberts, I. Veltman, A. Durkin, D. J. Smith, R. Grice, D. R. Herschbach, G. M. McClelland, and K. L. Kompa

Published
1979
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24. Reviews of books

Author

M. J. Cooper, D. M. Hirst, G. H. C. New, G. Wyllie, A. W. Potts, G. Beddard, I. H. Hiller, M. Lal, J. Mason, K. A. McLauchlan, M. N. R. Ashfold, and D. Caplin

Published
1983
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25. Pattern formation on silicon by laser-initiated liquid-assisted colloidal lithography.

Author

M Ulmeanu, P Petkov, D Ursescu, V A Maraloiu, F Jipa, E Brousseau, and M N R Ashfold

Subjects
SILICON, LITHOGRAPHY, DIFFRACTION patterns, LASER beams, INTENSITY modulation (Optics)
Abstract

We report sub-diffraction limited patterning of Si substrate surfaces by laser-initiated liquid-assisted colloidal lithography. The technique involves exposing a two-dimensional lattice of transparent colloidal particles spin coated on the substrate of interest (here Si) immersed in a liquid (e.g. methanol, acetone, carbon tetrachloride, toluene) to a single picosecond pulse of ultraviolet laser radiation. Surface patterns formed using colloidal particles with different radii in the range 195 nm ≤ R ≤ 1.5 μm and liquids with differing indices of refraction (nliquid) are demonstrated, the detailed topographies of which are sensitively dependent upon whether the index of refraction of the colloidal particle (ncolloid) is greater or smaller than nliquid (i.e. upon whether the incident light converges or diverges upon interaction with the particle). The spatial intensity modulation formed by diffraction of the single laser pulse by the colloidal particles is imprinted into the Si substrate. [ABSTRACT FROM AUTHOR]

Published
2015
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26. Synthesis of Aligned Arrays of Ultrathin ZnO Nanotubes on a Si Wafer Coated with a Thin ZnO FilmThe authors are grateful to the EPSRC for financial support via the portfolio partnership LASER, to the University of Bristol and the Overseas Research Scholarship (ORS) scheme for a postgraduate scholarship (Y. Sun), and to K. N. Rosser, Dr. S. A. Davis, Prof. D. Cherns, and Dr. S. J. Henley (now at the University of Surrey) for their various contributions to this work. Supporting Information is available online from Wiley InterScience or from the author.

Author

Y. Sun, G. M. Fuge, N. A. Fox, D. J. Riley, and M. N. R. Ashfold

Published
2005
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