Recent Publications
Ronald James Murphy
Contact Ronald Murphy at: murphy@ssd5.nrl.navy.mil
| 2007 | 2006 | 2005 | 2004 | 2003 | 2002 | 2001 | 2000 | ||
| 1999 | 1998 | 1997 | 1996 | 1995 | 1994 | 1993 | 1992 | 1991 | 1990 |
| 1989 | 1988 | 1987 | 1986 | 1985 | 1984 | 1983 |
"Using Gamma-Ray and Neutron Emission to Determine Solar Flare Accelerated Particle Spectra and Composition and the Conditions within the Flare Magnetic Loop", R.J. Murphy, B. Kozlovsky, G.H. Share, X.-M Hua & R.E. Lingenfelter, ApJ, 168, 167 (2007).
"Gamma Radiation from Flare-Accelerated Particles Impacting the Sun", G.H. Share & R.J. Murphy, in "Solar Eruptions and Energetic Particles", Geophysical Monograph Series 165, p. 177, 2006.
"What Gamma-Ray Deexcitation Lines Reveal about Solar Flares", R.J. Murphy & G.H. Share, Adv. Sp. Res., Volume 35, Issue 10, p. 1825-1832 (2005).
"The Physics of Positron Annihilation in the Solar Atmosphere", R.J. Murphy, G.H. Share, J.G. Skibo, and B. Kozlovsky, Ap.J., 161, 495 (2005).
"Positron Emitter Production in Solar Flares from 3He Reactions", Benzion Kozlovsky, R.J. Murphy, and G.H. Share, Ap.J., 604, 892 (2004).
"Solar Gamma-Ray Line Spectroscopy - Physics of a Flaring Star", G.H. Share and R.J. Murphy, in Stars as Suns: Activity, Evolution and Planets, ASP Conf. Series 219, ed. A. Benz & A. Dupree, p. 133 (2004).
"RHESSI e+ /e- Annihilation Radiation Observations: Implications for Conditions in the Flaring Solar Chromosphere", Share, R.J. Murphy, D.M. Smith, R.A. Schwartz and R.P. Lin, ApJL, 615, L169 (2004).
"Physical Implications of RHESSI Neutron Capture-Line Measurements", R.J. Murphy, G.H. Share, X.-M. Hua, R.P. Lin, D.M. Smith, and R.A. Schwartz, Ap.J. Letters, 595, L93 (2003).
"Directionality of Flare-Accelerated Alpha Particles at the Sun", G.H. Share, R.J. Murphy, D.M. Smith, R.P. Lin, B.R. Dennis, and R.A. Schwartz, Ap.J. Letters, 595, L89 (2003).
"High-Resolution Observation of the Solar Positron-Electron Annihilation Line", G.H. Share, R.J. Murphy, J.G. Skibo, D.M. Smith, H.H. Hudson, R.P. Lin, A.Y. Shih, B.R. Dennis, and R.A. Schwartz,Ap.J. Letters, 595, L85 (2003).
"High-Resolution Spectroscopy of Gamma-Ray Lines from the X-Class Solar Flare of 23 July, 2002", D.M. Smith, G.H. Share, R.J. Murphy, R.A. Schwartz, A.Y. Shih, and R.P. Lin, Ap.J. Letters, 595, L81 (2003).
"RHESSI Observation of Atmospheric Gamma Rays from Impact of Solar Energetic Particles on 21 April 2002", Gerald H. Share, Ronald J. Murphy, B.R. Dennis, R.A. Schwartz, A.K. Tolbert, R.P. Lin, & D.M. Smith, to be published in Solar Physics, (2002).
"Nuclear Deexcitation Gamma Ray Lines from Accelerated Particle Interactions", Benzion Kozlovsky, Ronald J. Murphy & Reuven Ramaty, ApJ Supp., 141, 523, (2002).
"Directionality of Solar Flare Accelerated Protons and Alpha Particles from Gamma-Ray Line Measurements", Gerald H. Share, Ronald J. Murphy, Jurgen Kiener & Nicolas de Sereville, ApJ, 573, 464, (2002).
"Impulsive and Extended Acceleration in the 1997 November 6 Solar Flare", M. Yoshimori, S. Nakayama, H. Takeda, H. Ogawa, R.J. Murphy, and G.H. Share, 2002, Adv. Space Res., 30 (no.1), 85.
"Gamma Rays and Neutrons from a Large Flare on November 6, 1997", M. Yoshimori, K. Suga, S. Nakayama, H. Takeda, H. Ogawa, R.J. Murphy, and G.H. Share, 2002, Adv. Space Res., 30 (no.3), 629.
"Atmospheric Gamma Rays from Solar Energetic Particles and Cosmic Rays Penetrating the Magnetosphere", G.H. Share and R.J. Murphy, JGR, Vol. 106 (Space Physics),, No. A1, 77-92, (2001).
"Limits on Radiative Capture Gamma-Ray Lines and Implications for Energy Content in Flare-Accelerated Protons", G.H. Share, R.J. Murphy, and E.K. Newton, Solar Physics, 201, 191 (2001).
"Gamma-Ray Line Observations of the 2000 July 14 Flare and SEP Impact on the Earth", G. H. Share, R. J. Murphy, A. J. Tylka, R. A. Schwartz, M. Yoshimori, K. Suga, S. Nakayama, H. Takeda, Solar Physics, 204: p. 43 (2001).
"Solar Gamma-Ray Physics Comes of Age", G. H. Share and R. J. Murphy, in "GAMMA 2001, Gamma Ray Astrophysics 2001", eds. S. Ritz, N. Gehrels & C. Shrader, AIP Conference Proceedings, 587, 603 (2001).
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"Accelerated-Particle Spectral Variability in the 1991 June 11 Solar flare, R.J. Murphy & G.H. Share, The Fifth Compton Symposium, eds. M.L. McConnell and J.M. Ryan, AIP Proceedings #510, (AIP, Melville, NY), p 559 (2000).
"Gamma-Ray Spectroscopy in the Pre-HESSI Era", G.H. Share and R.J. Murphy in 'High Energy Solar Physics: Anticipating HESSI', eds. R. Ramaty and N. Mandzhavidze, ASP Conference Series Vol. 206, pg. 377 (2000), Supporting agency:NASA, DPR W19343
"Simultaneous Observations of Solar Flares with CGRO/OSSE and Yohkoh/WBS", R.J. Murphy, G.H. Share, M. Yoshimori, in 'High Energy Solar Physics: Anticipating HESSI', eds. R. Ramaty and N. Mandzhavidze, ASP Conference Series Vol. 206, pg. 387 (2000).
"Measurement of Accelerated Particles at the Sun", G.H. Share & R.J. Murphy, in "Acceleration and Transport of Energetic Particles Observed in the Heliosphere", R. A. Mewaldt, J. R. Jokipii, M. A. Lee, E. Moebius, and T. H. Zurbuchen, editors, AIP Conference Proceedings #528, pg. 181 (2000)
``Surprisingly Intense Neutron Emission from a Flare Behind the Limb of the Sun", R.J. Murphy, G.H. Share, K.W. DelSignore, and X.-M. Hua, Ap. J. 510, 1011 (1999).
``The Solar Maximum Mission Atlas of Gamma Ray Flares", W.T. Vestrand, G.H. Share, R.J. Murphy, D.J. Forrest, E. Rieger, E.L. Chupp, and G. Kanbach, Ap J Supp, 120, 409 (1999).
"Atmospheric Gamma-Ray Lines Produced by Cosmic Rays and Solar Energetic Particles", G.H. Share and R.J. Murphy, Proc. of 26th Int. Cosmic Ray Conference, Salt Lake City, SH3.6.06, Vol. 7, pg. 329 (1999).
"Gamma-Ray Measurements of Energetic Heavy Ions at the Sun", G.H. Share and R.J. Murphy, Proc. of 26th Int. Cosmic Ray Conference, Salt Lake City, SH1.2.05, Vol. 6, pg. 13 (1999).
"OSSE Observations of the Orion Giant Molecular Cloud During 1996", M.J. Harris, R.J. Murphy, G.H. Share, et al., A & A, 329, 624 (1998).
``Accelerated and Ambient He Abundances from Gamma-Ray Line Measurements of Flares", G. H. Share and R. J. Murphy, Ap. J Vol. 508, 876 (1998).
"Coronal Abundances", A. Fludra, J. Saba, J. Henoux, R. Murphy, D. Reames, J. Lemen, K. Strong, J. Sylwester, and K. Widing in 'The Many Faces of the Sun', eds. K. Strong, J. Saba, B. Haisch, and J. Schmelz, (Springer-Verlag:New York), pg. 89.
"Intensity and Directionality of Flare-Accelerated a-Particles at the Sun", G.H. Share and R.J. Murphy 1997, Ap. J., 485, 409 (1997)
"A Method for Determining the Photospheric 4He Abundance", G.H. Share and R.J. Murphy, Ap. J. Letters, 484, L165 (1997).
"Accelerated Particle Composition and Energetics and Ambient Abundances from Gamma-Ray Spectroscopy of the 1991 June 4 Solar Flare, R.J. Murphy, G.H. Share, J.E. Grove, W.N. Johnson, R.L. Kinzer, J.D. Kurfess, M.S. Strickman, G.V. Jung 1997, Ap J, 490, 883.
"Solar and Stellar Gamma Ray Observations with COMPTON", G.H. Share, R.J. Murphy, and J. Ryan, Proceedings of the Fourth Compton Symposium (Part One: The Compton Observatory in Review), eds. C.D. Dermer, M.S. Strickman, & J.D. Kurfess, (AIP proceedings #410, New York), p. 17.
"OSSE Observations of the Orion Giant Molecular Cloud During 1996", M. J. Harris, R. J. Murphy, et al., A&A, 329, 624, 1997.
"Gamma-ray Line Measurements and Ambient Solar Abundances", G.H. Share, R.J. Murphy, and J.G. Skibo, in 'High Energy Solar Physics', AIP Conference Proceedings 374 , ed. Ramaty, Mandzhavidze, and Hua, p. 162 (1996).
"Abundance Study of the 4 June 1991 Solar Flare Using CGRO/OSSE Spectral Data", R.J. Murphy, G.H. Share, J.E. Grove, W.N. Johnson, R.L. Kinzer, J.D. Kurfess, M.S. Strickman, and G.V. Jung, in 'High Energy Solar Physics', AIP Conference Proceedings 374 , ed. Ramaty, Mandzhavidze, and Hua, p. 184 (1996)
"Limits on Nuclear Gamma-Ray Emission from Orion", R.J. Murphy, G.H. Share, J.E. Grove, W.N. Johnson, J.D. Kurfess, W.R. Purcell, K. McNaron-Brown, R. Ramaty, Ap. J., 473, p 990 (1996).
"Limits on Galactic Gamma-Ray Lines at 4.44 MeV and 6.13 MeV from Nuclear De-Excitation", M.J. Harris, G.H. Share, and D.C. Messina, Ap. J., 448, 157 (1995).
"Gamma-Ray Measurements of Flare-to-Flare Variations in Ambient Solar Abundances", G.H. Share and R.J. Murphy, Ap. J., 452, 933 (1995).
"Solar Atmospheric Abundances and Energy Content in Flare-Accelerated Ions from Gamma-Ray Spectroscopy", R. Ramaty, N. Mandzhavidze, B. Kozlovsky and R. J. Murphy, ApJ, 455, L193, 1995.
"Comparison of BATSE, COMPTEL, EGRET, AND OSSE Spectra of GRB 910601", G.H. Share, W.N. Johnson, J.D. Kurfess, R.J. Murphy, et al., in "Gamma-ray Bursts", AIP Conf. Proc. 307, Eds. G.J. Fishman, J.J. Brainerd, K. Hurley, AIP, NYC, p. 283 (1994).
"OSSE Observations of the 4 June 1991 Solar Flare", R.J. Murphy, G.H. Share, D.J. Forrest, D.A. Grabelsky, J.E. Grove, C.M. Jensen, W.N. Johnson, G.V. Jung, R.L. Kinzer, R.A. Kroeger, J.D. Kurfess, S.M. Matz, W.R. Purcell, M.S. Strickman, M.P. Ulmer, and W.T. Vestrand, in 'High-Energy Solar Phenomena--A new Era of Spacecraft Measurements', AIP Conf. Proc. 294, p. 15 (1994).
"Initial Results from OSSE on the Compton Observatory", W.N. Johnson, J.D. Kurfess, W.R. Purcell, S.M. Matz, M.P. Ulmer, M.S. Strickman, R.J. Murphy, D.A. Grabelsky, R.L. Kinzer, G.H.Share, R.A. Cameron, R.A. Kroeger, M. Maisack, G.V. Jung, C.M. Jensen, D.D. Clayton, M.D. Leising, J.E. Grove, and C.S. Dyer, Astron. and Astrophys. Suppl. 97, 21 (1993).
"OSSE Observations of Solar Flares", R.J. Murphy, G.H. Share, J.E. Grove, W.N. Johnson, R.L. Kinzer, R.A. Kroeger, J.D. Kurfess, M.S. Strickman, S.M. Matz, D.A. Grabelsky, W.R. Purcell, M.P. Ulmer, R.A. Cameron, G.V. Jung, C.M. Jensen, W.T. Vestrand, D.J. Forrest, in "COMPTON Gamma-Ray Observatory", eds. M. Friedlander, N. Gehrels, D. Macomb, AIP Proceedings 280, p.619 (1993).
"OSSE Observations of the 4 June 1991 Solar Flare", R.J. Murphy, G.H. Share, D.J. Forrest, D.A. Grabelsky, J.E. Grove, C.M. Jensen, W.N. Johnson, G.V. Jung, R.L. Kinzer, R.A. Kroeger, J.D. Kurfess, S.M. Matz, W.R. Purcell, M.S. Strickman, M.P. Ulmer, and W.T. Vestrand, Proc. 23rd International Cosmic Ray Conference, 3, 99 (1993).
"OSSE Observations of Cosmic Gamma-Ray Bursts", G.H. Share, W.N. Johnson, R.L. Kinzer, R.A. Kroeger, J.D. Kurfess, R.J. Murphy, M.S. Strickman, S.M. Matz, D.A. Grabelsky, W.R. Purcell, M.P. Ulmer, R.A. Cameron, G.V. Jung, and J.E. Grove, in 'Gamma-Ray Bursts', eds. W. Paciesas and G. Fishman, AIP Proceedings 265, p. 32 (1992).
"Operations and Performance of the OSSE Instrument", R.A. Cameron, J.D. Kurfess, W.N. Johnson, R.L. Kinzer, R.A. Kroeger, M.D. Leising, R.J. Murphy, G.H. Share, M.S. Strickman, J.E. Grove, G.V. Jung, D.A. Grabelsky, S.M. Matz, W.R. Purcell, M.P. Ulmer, 'Proceedings of the Compton Observatory Science Workshop', eds. C. Shrader, N. Gehrels, B. Dennis, NASA Conference Publication 3137 (1992).
"Upper Limit on the Steady Emission of the 2.223 MeV Neutron Capture Gamma-Ray Line from the Sun", M.J. Harris, G.H. Share, J.H. Beall, and R.J. Murphy, Solar Physics 142, 171 (1992).
"The Oriented Scintillation Spectrometer Experiment on GRO", J.D. Kurfess, W.N. Johnson, R.L. Kinzer, M.D. Leising, R.J. Murphy, G.H. Share, M.S. Strickman, D.A. Grabelsky, S.M. Matz, W.R. Purcell, M.P. Ulmer, R.A. Cameron, G.V. Jung, D.D. Clayton, C.S. Dyer, C.M. Jensen, J.E. Grove, Adv. Space Res., 11, no. 8, p 323 (1991).
"Upper Limit on the Steady Emission of the 2.223 MeV Neutron Capture Gamma-ray Line from the Sun", M. J. Harris, G. H. Share, J. H. Beall and R. J. Murphy, Solar Physics, 142, 171, 1991.
"Solar Abundances from Gamma-Ray Spectroscopy: Comparisons with Energetic Particle, Photospheric, and Coronal Abundances", R. J. Murphy, R. Ramaty, B. Kozlovsky and D. V. Reames, ApJ, 371, 793, 1991.
"Nuclear Line Spectroscopy Using SMM/GRS Gamma-Ray Data from Solar Flares", R.J. Murphy, G.H. Share, D.J. Forrest, W.T. Vestrand, In Proceedings of XXI International Cosmic Ray Conf., 5, 48 (1990).
"Nuclear Line Spectroscopy of the 27 April 1981 Solar Flare", R.J. Murphy, G.H. Share, J.R. Letaw, D.J. Forrest, Ap. J., 358, 298 (1990).
"Solar Accelerated Particles: Comparisons of Abundances and Energy Spectra from Particle and Gamma-Ray Observations", R. Ramaty, R. J. Murphy and J. A. Miller, in Particle Astrophysics, ed. W. V. Jones, F. Kerr and J. Ormes, (New York:AIP), p. 143, 1990.
"The Compton Tail on the Neutron Capture Line: SMM GRS Measurements of the June 3, 1982 Flare", W. T. Vestrand, D. J. Forrest, R. J. Murphy, E. L. Chupp, and G. Kanbach, 22nd ICRC, 5, Adelaide, p. 160, 1990.
"Gamma Rays from Molecular Clouds and from Pulsar-Wolf Rayet Star Systems", R. Silberberg and R. J. Murphy, 22nd ICRC, 1, Adelaide, p. 162, 1990.
"7Li and7Be Deexcitation Lines: Probes for Accelerated Particle Transport Models in Solar Flares", R. J. Murphy, X.-M. Hua, B. Kozlovsky and R. Ramaty, ApJ, 351, 299, 1990.
"Scientific Objectives of the Oriented Scintillation Spectrometer Experiment", J.D. Kurfess, W.N. Johnson, R.L. Kinzer, M.D. Leising, G.H. Share, M.S. Strickman, D.A. Grabelsky, S.M. Matz, W.R. Purcell, M.P. Ulmer, R.A. Cameron, G.V. Jung, R.J. Murphy, D.D. Clayton, C.S. Dyer, C.M. Jensen, Proceedings of the Gamma Ray Observatory Science Workshop, ed. W. Neil Johnson, 3-35 (1989).
"Gamma-Ray Lines from Nucleosynthesis and from Cosmic-Ray and Solar- Flare Particle Interactions", R. Silberberg, M. D. Leising and R. J. Murphy, in Cosmic Gamma Rays, Neutrinos,and Related Astrophysics, eds. M. M. Shapiro and J. P. Wefel (Dordrecht:Kluwer Academic Publishers), p. 329, 1989.
"Nuclear Line Spectroscopy of Solar Flares", D. J. Forrest and R. J. Murphy, Solar Physics, 118, 123, 1988.
"Gamma-Ray Spectroscopic Tests for the Anisotropy of Accelerated Particles in Solar Flares", R. J. Murphy, B. Kozlovsky and R. Ramaty, ApJ, 331, 1029, 1988.
"Solar Abundances Using Gamma-Ray Line Spectroscopy of a Solar Flare", R. J. Murphy, in Proceedings of the Workshop on Nuclear Spectroscopy of Astrophysical Sources, eds. N. Gehrels and G. H. Share, p. 228, 1988.
"Nuclear Processes and Accelerated Particles in Solar Flares", R. Ramaty and R. J. Murphy, Space Science Reviews, 45, 213, 1987.
"Neutrons and Gamma Rays from the 3 June 1982 Solar Flare", R. J. Murphy and R. Ramaty, in Processes at the Surface and Inside the Sun, 21st ICRC, Moscow, p. 144, 1987.
"Stochastic Acceleration in the Transrelativistic Region and Pion Production in Solar Flares", J. A. Miller, R. Ramaty and R. J. Murphy, 21st ICRC, 3, Moscow, p. 33, 1987.
"On the Origin of the Pion-Decay Radiation in the 1982 June 3 Solar Flare",R. Ramaty, R. J. Murphy and C. D. Dermer, ApJ, 316, L4, 1987.
"High Energy Processes in Solar Flares", R. J. Murphy, C. D. Dermer and R. Ramaty, ApJS, 63, 721, 1987.
"Pion-Decay Radiation and Two-Phase Acceleration in the June 3, 1982 Solar Flare", R. Ramaty, R. J. Murphy and C. D. Dermer, Advances in Space Research, 6, No. 6, p. 119, 1986.
"Particle Acceleration in Flares", in Energetic Phenomena on the Sun; The SMM Flare Workshop Proceedings, ed. Mukul Kundu and Bruce Woodgate, NASA Conference Publication 2439, 1986.
"Gamma Rays and Neutrons from Solar Flares", Ph.D. Thesis, University of Maryland, 1985.
"Solar Flare Gamma-Ray Line Spectroscopy", R. J. Murphy, D. J. Forrest, R. Ramaty and B. Kozlovsky, 19th ICRC, 4, La Jolla, p. 253, 1985.
"Abundances form Solar Flare Gamma-Ray Line Spectroscopy", R. J. Murphy, R. Ramaty, D. J. Forrest and B. Kozlovsky, 19th ICRC, 4, La Jolla, p. 249, 1985.
"Solar Flare Neutrons and Gamma Rays", R. J. Murphy and R. Ramaty, Advances in Space Research, 4, No. 7, p. 127, 1984.
"Neutrons and Gamma Rays from Solar Flares", R. Ramaty and R. J. Murphy, in High Energy Transients in Astrophysics, ed. S. Woosley, (New York:AIP), p. 628, 1984.
“Implications of High-Energy Neutron Observations from Solar Flares”, R. Ramaty, R. J. Murphy, B. Kozlovsky and R. E. Lingenfelter, ApJ, 273, L41, 1983.