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Professor Helen O'Keeffe FHEA

Professor of Particle Physics

  1. Published

    A beta-alpha coincidence counting system for measurement of trace quantities of 238U and 232Th in aqueous samples at the Sudbury Neutrino Observatory

    Dawson, M., Doucas, G., Fergani, H., Jelley, N. A., Majerus, S., O'Keeffe, H. M., Peeters, S. J. M. & Perry, C., 18/08/2016, In: Journal of Instrumentation. 11, 8, 11 p., P08013.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  2. Published

    A Long Baseline Neutrino Oscillation Experiment Using J-PARC Neutrino Beam and Hyper-Kamiokande

    Group, H-K. W., Abe, K., Aihara, H., Andreopoulos, C., Anghel, I., Ariga, A., Ariga, T., Asfandiyarov, R., Askins, M., Back, J. J., Ballett, P., Barbi, M., Barker, G. J., Barr, G., Bay, F., Beltrame, P., Berardi, V., Bergevin, M., Berkman, S., Berry, T., & 205 othersBhadra, S., Blaszczyk, F. D. M., Blondel, A., Bolognesi, S., Bravar, A., Bronner, C., Cafagna, F. S., Carminati, G., Catanesi, M. G., Choi, K., Collazuol, G., Cowan, G., Cremonesi, L., Rosa, G. D., Densham, C., Detwiler, J., Dewhurst, D., Lodovico, F. D., Luise, S. D., Drapier, O., Emery, S., Ereditato, A., Feusels, T., Finch, A., Fitton, M., Friend, M., Fujii, Y., Fukuda, Y., Fukuda, D., Galymov, V., Ganezer, K., Gonin, M., Gumplinger, P., Hadley, D. R., Haegel, L., Haesler, A., Haga, Y., Hartfiel, B., Hartz, M., Hayato, Y., Hierholzer, M., Himmel, A., Hirota, S., Horiuchi, S., Huang, K., Ichikawa, A. K., Iijima, T., Ikeda, M., Imber, J., Inoue, K., Insler, J., Intonti, R. A., Irvine, T., Ishida, T., Ishino, H., Ishitsuka, M., Itow, Y., Izmaylov, A., Jamieson, B., Jang, H. I., Jiang, M., Joo, K. K., Kaboth, A., Kajita, T., Kameda, J., Karadhzov, Y., Katori, T., Kearns, E., Khabibullin, M., Khotjantsev, A., Kishimoto, Y., Kobayashi, T., Koga, M., Konaka, A., Kormos, L. L., Korzenev, A., Koshio, Y., Kropp, W. R., Kudenko, Y., Kutter, T., Kuze, M., Labarga, L., Lagoda, J., Laveder, M., Lawe, M., Learned, J. G., Lim, I. T., Lindner, T., Longhin, A., Ludovici, L., Magaletti, L., Mahn, K., Malek, M., Mariani, C., Marti, L., Martins, P. P. J., Mazzucato, E., McCauley, N., McFarland, K. S., McGrew, C., Mezzetto, M., Minakata, H., Minamino, A., Mine, S., Mineev, O., Miura, M., Monroe, J., Mori, T., Moriyama, S., Mueller, T., Muheim, F., Nakahata, M., Nakamura, K., Nakaya, T., Nakayama, S., Nicholls, T., Nirkko, M., Nishimura, Y., Noah, E., Nowak, J., Nunokawa, H., O'Keeffe, H. M., Okajima, Y., Oser, S. M., O'Sullivan, E., Oyama, Y., Perez, J., Pac, M. Y., Palladino, V., Palomino, J. L., Paolone, V., Payne, D., Perevozchikov, O., Perkin, J. D., Pistillo, C., Playfer, S., Posiadala-Zezula, M., Poutissou, J. -M., Quilain, B., Quinto, M., Radicioni, E., Ratoff, P. N., Ravonel, M., Rayner, M., Redij, A., Retiere, F., Riccio, C., Richard, E., Rondio, E., Ross-Lonergan, M., Rott, C., Rountree, S. D., Rubbia, A., Sacco, R., Sakuda, M., Sanchez, M. C., Scantamburlo, E., Scholberg, K., Seiya, Y., Sekiguchi, T., Sekiya, H., Shaikhiev, A., Shimizu, I., Shiozawa, M., Sinnis, G., Smy, M. B., Sobczyk, J., Sobel, H. W., Stewart, T., Suda, Y., Suzuki, Y., Suzuki, A. T., Svoboda, R., Tacik, R., Takeda, A., Taketa, A., Tanaka, H. A., Tanaka, H. K. M., Tanaka, H., Terri, R., Thorpe, M., Tobayama, S., Tolich, N., Tomura, T., Touramanis, C., Tsukamoto, T., Tzanov, M., Uchida, Y., Vagins, M. R., Vasseur, G., Vogelaar, R. B., Wark, D., Wascko, M. O., Weber, A., Wendell, R., Wilkes, R. J., Wilking, M. J., Xin, T., Yamamoto, K., Yanagisawa, C., Yano, T., Yen, S., Yershov, N., Yokoyama, M. & Zito, M., 15/12/2014, In: arxiv.org.

    Research output: Contribution to Journal/MagazineJournal article

  3. Published

    A search for $hep$ solar neutrinos and the diffuse supernova neutrino background using all three phases of the Sudbury Neutrino Observatory

    SNO Collaboration, Kormos, L. L. & O'Keeffe, H. M., 29/09/2020, In: Physical Review D.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  4. Published

    A search for astrophysical burst signals at the Sudbury Neutrino Observatory

    SNO Collaboration, 03/2014, In: Astroparticle Physics. 55, p. 1-7 7 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  5. Published

    An Array of low-background 3He proportional counters for the Sudbury Neutrino Observatory

    SNO Collaboration, 11/09/2007, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 579, 3, p. 1054-1080 27 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  6. Published
  7. Published

    Combined analysis of all three phases of solar neutrino data from the Sudbury Neutrino Observatory

    Aharmim, B., Ahmed, S. N., Anthony, A. E., Barros, N., Beier, E. W., Bellerive, A., Beltran, B., Bergevin, M., Biller, S. D., Boudjemline, K., Boulay, M. G., Cai, B., Chan, Y. D., Chauhan, D., Chen, M., Cleveland, B. T., Cox, G. A., Dai, X., Deng, H., Detwiler, J. A., & 31 othersDiMarco, M., Doe, P. J., Doucas, G., Drouin, P. -L., Duncan, F. A., Dunford, M., Earle, E. D., Elliott, S. R., Evans, H. C., Ewan, G. T., Farine, J., Fergani, H., Fleurot, F., Ford, R. J., Formaggio, J. A., Gagnon, N., Goon, J. T. M., Graham, K., Guillian, E., Habib, S., Hahn, R. L., Hallin, A. L., Hallman, E. D., Harvey, P. J., Hazama, R., Heintzelman, W. J., Heise, J., Helmer, R. L., Kormos, L. L., O'Keeffe, H. & SNO Collaboration, 1/08/2013, In: Physical Review C. 88, 2, 27 p., 025501.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  8. Published

    Constraint on the matter–antimatter symmetry-violating phase in neutrino oscillations

    T2K Collaboration, Brailsford, D., Dealtry, T., Finch, A. J., Knox, A., Kormos, L. L., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N. & Walsh, J. G., 15/04/2020, In: Nature. 580, p. 339-344 6 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  9. Published

    Constraints on neutrino lifetime from the Sudbury Neutrino Observatory

    SNO Collaboration, 25/02/2019, In: Physical Review D. 99, 3, 10 p., 032013.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  10. Published

    Cosmogenic neutron production at the Sudbury Neutrino Observatory

    SNO Collaboration, Kormos, L. L. & O'Keeffe, H. M., 12/12/2019, In: Physical Review D. 100, 11, 15 p., 112005.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  11. Published

    Current status and future prospects of the SNO+ experiment

    SNO+ Collaboration, 25/01/2016, In: Advances in High Energy Physics. 2016, 21 p., 6194250.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  12. Published

    Determination of the νe and total B8 solar neutrino fluxes using the Sudbury Neutrino Observatory Phase I data set

    SNO Collaboration, 27/04/2007, In: Physical Review C. 75, 4, 69 p., 045502.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  13. Published

    Development, characterisation, and deployment of the SNO+ liquid scintillator

    SNO+ Collaboration, Kormos, L. L., O'Keeffe, H. M. & Parnell, M. J., 10/05/2021, In: Journal of Instrumentation. 16, 24 p., P05009.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  14. Published

    Event-by-Event Direction Reconstruction of Solar Neutrinos in a High Light-Yield Liquid Scintillator

    SNO+ Collaboration, Kormos, L. L. & O'Keeffe, H. M., 3/04/2024, In: Physical Review D. 109, 7, 072002.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  15. Published

    Evidence of Antineutrinos from Distant Reactors Using Pure Water at SNO+

    (The SNO+ Collaboration), 1/03/2023, In: Physical review letters. 130, 9, 8 p., 091801.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  16. Published

    Evidence of electron neutrino appearance in a muon neutrino beam

    T2K Collaboration, 5/08/2013, In: Physical Review D. 88, 3, 41 p., 032002.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  17. Published

    First combined analysis of neutrino and antineutrino oscillations at T2K

    T2K Collaboration, 14/04/2017, In: Physical review letters. 118, 15, 9 p., 151801.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  18. Published

    First combined measurement of the muon neutrino and antineutrino charged-current cross section without pions in the final state at T2K

    T2K Collaboration, Brailsford, D., Dealtry, T., Doyle, T. A., Finch, A. J., Knox, A., Kormos, L. L., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N. & Walsh, J. G., 1/06/2020, In: Physical Review D. 101, 11, 44 p., 112001.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  19. Published

    First measurement of muon neutrino charged-current interactions on hydrocarbon without pions in the final state using multiple detectors with correlated energy spectra at T2K

    The T2K Collaboration, 18/12/2023, In: Physical Review D. 108, 11, 32 p., 112009.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  20. Published

    First measurement of the charged current ν ¯ μ double differential cross section on a water target without pions in the final state.

    T2K Collaboration, 21/07/2020, In: Physical Review D. 102, 1, 16 p., 012007.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  21. Published

    First measurement of the muon neutrino charged current single pion production cross section on water with the T2K near detector

    T2K Collaboration, 01/2017, In: Physical Review D. 95, 1, 012010.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  22. Published

    First measurement of the nu(mu) charged-current cross section on a water target without pions in the final state

    Brailsford, D., Dealtry, T., Finch, A. J., Knox, A., Kormos, L. L., Lamont, I., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N., Shaw, D. & T2K Collaboration, 8/01/2018, In: Physical Review D. 97, 1, 16 p., 012001.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  23. Published

    First T2K measurement of transverse kinematic imbalance in the muon-neutrino charged-current single-$π^+$ production channel containing at least one proton

    T2K Collaboration, Dealtry, T., Doyle, T. A., Finch, A. J., Kormos, L. L., Lawe, M., Nowak, J., O'Keeffe, H. M., Ratoff, P. N. & Walsh, J. G., 21/06/2021, In: Physical Review D. 103, 11, 27 p., 112009.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  24. Published

    Four methods for determining the composition of trace radioactive surface contamination of low-radioactivity metal

    O'keeffe, H. M., Burritt, T. H., Cleveland, B. T., Doucas, G., Gagnon, N., Jelley, N. A., Kraus, C., Lawson, I. T., Majerus, S., Mcgee, S. R., Myers, A. W., Poon, A. W. P., Rielage, K., Robertson, R. G. H., Rosten, R. C., Stonehill, L. C., Vandevender, B. A. & Van Wechel, T. D., 11/12/2011, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 659, 1, p. 182-192 11 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

  25. Published

    High sensitivity measurement of 224Ra and 226Ra in water with an improved hydrous titanium oxide technique at the Sudbury Neutrino Observatory

    Aharmim, B., Cleveland, B. T., Dai, X., Doucas, G., Farine, J., Fergani, H., Ford, R., Hahn, R. L., Hallman, E. D., Jelley, N. A., Lange, R., Majerus, S., Mifflin, C., Noble, A. J., O'Keeffe, H., Rodriguez-jimenez, R., Sinclair, D. & Yeh, M., 1/06/2009, In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 604, 3, p. 531-535 5 p.

    Research output: Contribution to Journal/MagazineJournal articlepeer-review

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