Dr. Mark Riley

Dr. Mark A. Riley

Robert O. Lawton Distinguished Professor
Raymond K. Sheline Professor of Physics

Office: 214 Keen
Phone: (850)644-2066
mriley@fsu.edu

Research

Exotic nuclear structure phenomena at the extremes of angular momentum, excitation energy and deformation, as well as, nuclei far from stability

Selected Publications

Electromagnetic moments of radioactive 136Te and the emergence of collectivity 2p*2n outside of double-magic 132Sn
J. M. Allmond, A. E. Stuchbery, M. Danchev, C. Baktash, A. Gargano, A. Galindo-Uribarri, D. C. Radford, C. R. Bingham, B. A. Brown, L. Coraggio, A. Covello, C. J. Gross, P. A. Hausladen, N. Itaco, K. Lagergren, E. Padilla-Rodal, J. Pavan, M. A. Riley, N. J. Stone, D. W. Stracener, R. L. Varner, and C. -H. Yu
Phys. Rev. Lett. (2017), in press.

Investigation of negative-parity states in 156Dy: Search for evidence of tetrahedral symmetry
D. J. Hartley, L. L. Riedinger, R. V. F. Janssens, S. N. T. Majola, M. A. Riley, J. M. Allmond, C. W. Beausang, M. P. Carpenter, C. J. Chiara, N. Cooper, D. Curien, B. J. P. Gall, P. E. Garrett, F. G. Kondev, W. D. Kulp, T. Lauritsen, E. A. McCutchan, D. Miller, S. Miller, J. Piot, N. Redon, J. F. Sharpey-Schafer, J. Simpson, I. Stefanescu, X. Wang, V. Werner, J. L. Wood, C.-H. Yu, S. Zhu, and J. Dudek
Phys. Rev. C (2017), in press.

High Resolution Gamma-Ray Spectroscopy and the Fascinating Angular Momentum Realm of the Atomic Nucleus
M.A. Riley, J. Simpson and E.S. Paul
Physica Scripta: Special invitation only Focus issue to celebrate the 40 year anniversary of the 1975 Nobel Prize to Aage Bohr, Ben Mottelson and Leo Rainwater
Physica Scripta 91, 12 (2016).

Persistence of collective behavior at high spin in the N=88 nucleus 153Tb
D. J. Hartley, M. A. Riley, X. Wang, S. Miller, R. V. F. Janssens, E. S. Paul, J. M. Rees, J. Simpson, L. L. Riedinger, A. D. Ayangeakaa, M. P. Carpenter, C. J. Chiara, U. Garg, P. Hampson, C. R. Hoffman, F. G. Kondev, T. Lauritsen, P. J. R. Mason, J. T. Matta, P. J. Nolan, J. Ollier, M. Petri, D. C. Radford, J. P. Revill, S. Zhu, and I. Ragnarsson
Phys. Rev. C. 91, 057301 (2015).

Spectroscopy of 161Hf from low to high spin
P. J. R. Mason, J.Simpson, E.S.Paul, M.A. Riley, K. Auranen, H. Badran, J. S. Baron, A. J. Boston, T. Davis-Merry, T. Grahn, P. T. Greenlees, A. Herzn, U. Jakobsson, D. T. Joss, R. Julin, S. Juutinen, J. Konki, M. Leino, C. McPeake, S. L. Miller, G. ONeill, J. Pakarinen, P. Papadakis, J. Partanen, P. Peura, P. Ruotsalainen, M. Sandzelius, J. Sarn, C. Scholey, J. F. Sharpey-Schafer, L. Sinclair, J. Sorri, S. Stolze, J. Uusitalo, K. Villafani, F. Wearing, and J. P. Wright
Phys. Rev. C 90, 054331 (2014).

High-spin structure of odd-odd 172Re
D. J. Hartley, R. V. F. Janssens, L. L. Riedinger, M. A. Riley, X. Wang, S. Miller, A. D. Ayangeakaa, M. P. Carpenter, J. J. Carroll, J. Cavey, C. J. Chiara, P. Chowdhury, U. Garg, S. S. Hota, E. G. Jackson, F. G. Kondev, T. Lauritsen, M. Litz, W. C. Ma, J. Matta, E. S. Paul, E. E. Pedicini, J. Simpson, J. R. Vanhoy, and S. Zhu
Phys. Rev. C 90, 017301 (2014).

Quadrupole moments of coexisting collective shapes at high spin in 154Er
J. P. Revill, E. S. Paul, X. Wang, M. A. Riley, J. Simpson, R. V. F. Janssens, J. Ollier, A. J. Boston, M. P. Carpenter, C. J. Chiara, C. R. Hoffman, F. G. Kondev, T. Lauritsen, P. J. Nolan, J. M. Rees, S. V. Rigby, C. Unsworth, S. Zhu, and I. Ragnarsson
Phys. Rev. C 88, 031304(Rapid Comm) (2013)

Nuclear Gamma Spectroscopy and the Gamma-Spheres
M.A.Riley and J. Simpson
Encyclopedia of Nuclear Physics and its Applications, edited by Reinhard Stock, p 247 - 269. Wiley-VCH Publishing, 2013.

Evolution of nuclear structure in erbium-158
X. Wang, M.A.Riley, E. S. Paul and J. Simpson
2013 McGraw- Hill Yearbook of Science and Technology (ISSN 0076-2016).

Quadrupole Moments of Collective Structures at Ultrahigh Spin in 157Er and 158Er: A Challenge for Understanding Triaxiality in Nuclei.
X. Wang, M.A.Riley, J. Simpson, E. S. Paul, J. Ollier, R. V. F. Janssens, A. D. Ayangeakaa, H. C. Boston, M. P. Carpenter, C. J. Chiara, U. Garg, D. J. Hartley, D. S. Judson, F. G. Kondev, T. Lauritsen, J. Matta, P. J. Nolan, M. Petri, J. P. Revill, L. L. Riedinger, S. V. Rigby, C. Unsworth, S. Zhu, and I. Ragnarsson
Physics Letters B 702, 127 (2011).

Rotational structures and the wobbling mode in 167Ta
D. J. Hartley, R. V. F. Janssens, L. L. Riedinger, M.A.Riley, X. Wang, A. Aguilar, M. P. Carpenter, C. J. Chiara, P. Chowdhury, I. G. Darby, U. Garg, Q. A. Ijaz, F. G. Kondev, S. Lakshmi, T. Lauritsen, A. Ludington, W. C. Ma, E. A. McCutchan, S. Mukhopadhyay, R. Pifer, E. P. Seyfried, U. Shirwadkar, I. Stefanescu, S. K. Tandel, J. R. Vanhoy, S. Zhu, and S. Frauendorf,
Phys. Rev. C 83, 064307 (2011).

Multi-quasiparticle structures up to spin 44h in the odd-odd nucleus 168Ta
X. Wang, D. J. Hartley, M. A. Riley, L. L. Riedinger, A. Aguilar, M. P. Carpenter, C. J.Chiara, P. Chowdhury, I. Darby, U. Garg, Q. Ijaz, R. V. F. Janssens, F. G. Kondev, S. Lakshmi, T. Lauritsen, W. C. Ma, E. A. McCutchan, S. Mukhopadhyay, E. P. Seyfried, Stefanescu, S. K. Tandel, U. S. Tandel, C. Teal, J. R. Vanhoy, and S. Zhu.
Phys. Rev. C 82, 034315 (2010).

Alignments, additivity, and signature inversion in odd-odd 170Ta: A comprehensive high-spin study
A. Aguilar, D. J. Hartley, M. A. Riley, C. Teal, M. P. Carpenter, P. Chowdhury, M. Danchev, M. K. Djongolov, G. B. Hagemann, A. A. Hecht, R. V. F. Janssens, F. G. Kondev, T. Lauritsen, W. C. Ma, W. H. Mohr, E. F. Moore, S. W. Ødegärd, L. L. Riedinger, G. Sletten, S. K. Tandel, J. R. Vanhoy, X. Wang, and S. Zhu
Phys. Rev. C 81, 064317 (2010)

Ultrahigh-spin spectroscopy of 159,160Er: Observation of triaxial strongly deformed structures
J. Ollier, J. Simpson, X. Wang, M. A. Riley, A. Aguilar, C. Teal, E. S. Paul, P. J. Nolan, M. Petri, S. V. Rigby, J. Thomson, C. Unsworth, M. P. Carpenter, R. V. F. Janssens, F. G. Kondev, T. Lauritsen, S. Zhu, D. J. Hartley, I. G. Darby, and I. Ragnarsson
Phys. Rev. C 80, 064322 (2009)

Wobbling mode in 167Ta
D. J. Hartley, R. V. F. Janssens, L. L. Riedinger, M. A. Riley, A. Aguilar, M. P. Carpenter, C. J. Chiara, P. Chowdhury, I. G. Darby, U. Garg, Q. A. Ijaz, F. G. Kondev, S. Lakshmi, T. Lauritsen, A. Ludington, W. C. Ma, E. A. McCutchan, S. Mukhopadhyay, R. Pifer, E. P. Seyfried, I. Stefanescu, S. K. Tandel, U. Tandel, J. R. Vanhoy, X. Wang, S. Zhu, I. Hamamoto, and S. Frauendorf.
Phys. Rev. C 80, 041304 (2009)

Loss of collectivity in the transitional 156Er nucleus at high spin
E. S. Paul, S. V. Rigby, M. A. Riley, J. Simpson, D. E. Appelbe, D. B. Campbell, P. T. W. Choy, R. M. Clark, M. Cromaz, A. O. Evans, P. Fallon, A. Görgen, D. T. Joss, I. Y. Lee, A. O. Macchiavelli, P. J. Nolan, A. Pipidis, D. Ward, and I. Ragnarsson.
Phys. Rev. C 79, 044324 (2009)

Triaxial strongly deformed bands in 160,161Tm
C. Teal, K. Lagergren, A. Aguilar, D. J. Hartley, M. A. Riley, J. Simpson, M. P. Carpenter, U. Garg, R. V. F. Janssens, D. T. Joss, F. G. Kondev, T. Lauritsen, C. J. Lister, X. Wang, S. Zhu, and I. Ragnarsson.
Phys. Rev. C 78, 017305 (2008)

New shape minimum in 160Yb: Evidence for a triaxial, strongly deformed band
A. Aguilar, D. B. Campbell, A. Pipidis, M.A. Riley, C. Teal, J. Simpson, D.J.Hartley, R.M. Clark, M. Cromaz, P. Fallon, I.Y. Lee, A.O. Macchiavelli and I. Ragnarsson.
Phys. Rev. C. 77, 021302(R)(2008)

The return of collective rotation in 157Er and 158Er at ultra-high spin
E. S. Paul, P.J. Twin, A. O. Evans, A. Pipidis, M. A. Riley, J. Simpson, D. E. Appelbe, D. B. Campbell, P. T. W. Choy, R. M. Clark, M. Cromaz, P. Fallon, A. Grgen, D. T. Joss, I. Y. Lee, A. O. Macchiavelli, P. J. Nolan, D. Ward, I. Ragnarsson, and F. Saric
Phys. Rev. Lett. 98, 012501 (2007).

Selected Published Conference Proceedings

RECENT RESULTS AT ULTRAHIGH SPIN: TERMINATING STATES AND BEYOND IN MASS 160 RARE-EARTH NUCLEI
E.S. Paul, J.M. Rees, P. Hampson, M.A. Riley, J. Simpson, A.D. Ayangeakaa, J.S. Baron, M.P. Carpenter, C.J. Chiara, U. Garg, D.J. Hartley, C.R. Hoffman, R.V.F. Janssens, F.G. Kondev, T. Lauritsen, P.J.R. Mason, J. Matta, S.L. Miller, P.J. Nolan, J. Ollier, M. Petri, D.C. Radford, J.P. Revill, X. Wang, S. Zhu, I. Ragnarsson.
ACTA PHYSICA POLONICA B, Vol. 46, 487 (2015).

Collective structures up to spin similar to 65(h)over-bar in the N=90 isotones 158Er and 157Ho
Wang, X.; Riley, M. A.; Simpson, J.; et al.
RUTHERFORD CENTENNIAL CONFERENCE ON NUCLEAR PHYSICS, 2011 Book Series: Journal of Physics Conference Series Volume: 381 Article Number: 012065 Published: 2012

Modern γ-ray spectroscopy and exotic behavior in rare-earth N=90 nuclei at the limits of excitation energy and angular momentum
Xiaofeng Wang and Mark A. Riley
EXOTIC NUCLEI AND NUCLEAR/PARTICLE ASTROPHYSICS (IV). FROM NUCLEI TO STARS: Carpathian Summer School of Physics 2012. June 24- July 7, 2012, Sinaia, Romania. AIP Conf. Proc. 1498, 84 (2012)

Exotic Behavior at Ultrahigh Spin Values in Light Rare-Earth N=90 Nuclei
M.A. Riley, X. Wang, J. Simpson, E. S. Paul, R. V. F. Janssens, A. D. Ayangeakaa, J. Baron, H. C. Boston, M. P. Carpenter, C. J. Chiara, U. Garg, P. Hampson, D. J. Hartley, C. R. Hoffman, F. G. Kondev, T. Lauritsen, N. M. Lumley, J. Matta, S. Miller, P. J. Nolan, J. Ollier, M. Petri, D. C. Radford, J. M. Rees, J. P. Revill, L. L. Riedinger, S. V. Rigby, C. Unsworth, S. Zhu, and I. Ragnarsson
The Fifth International Conference on Fission and Properties of Neutron Rich Nuclei, Sanibel Island, FL, November 4-10, 2012, published by World Scientific, DOI: 10.1142/9789814525435_0025, ISBN: 978-981-4525-42-8

The exciting γ-ray world of the atomic nucleus: The evolution of nuclear structure in 158Er and the future of γ-ray spectroscopy
X. Wang and M.A.Riley,
Symposium on Exciting Physics: quarks and gluons /atomic nuclei / biological systems /networks, 13-20 November 2011, Makutsi, South Africa.

Strongly deformed nuclear shapes at ultra-high spin and shape coexistance in N~90 Nuclei
M.A. Riley, A. Aguilar, A.O. Evans, D.J. Hartley, K. Lagergren, J. Ollier, E.S. Paul, A. Pipidis, J. Simpson, C. Teal, P.J. Twin, X. Wang, D.E. Appelbe, D.B. Campbell, M.P. Carpenter, R.M. Clark, M. Cromaz, I.G. Darby, P. Fallon, U. Garg, R.V.F. Janssens, D.T. Joss, F.G. Kondev, T. Lauritsen, I.Y. Lee, C.J. Lister, A.O. Macchiavelli, P.J. Nolan, M. Petri, S.V. Rigby, J. Thompson, C. Unsworth, D. Ward, S. Zhu, I. Ragnarsson
ACTA PHYSICA POLONICA B, Vol. 40, No 3 (2009) 513.

Selected Invited Talks

"Nuclear Science Highlights from the Past 50 years at ORNL" Invited talk at the International Conference on Nuclear Structure 2016 (NS16), Knoxville, July 24-29, 2016.

"The Evolution of Shapes and Collectivity with Increasing Angular Momentum" Invited talk at the International Workshop on Shapes and Symmetries in Nuclei: from Experiment to Theory (SSNET) 2016, hosted by the Centre de Sciences Nucleaires et Sciences de la Matiere (CSNSM) in Orsay, France, November 7 - 11, 2016.

"Spin 60 and Beyond: Exotic behavior at the limits of angular momentum" Invited talk at the International Conference "Reflections on the Atomic Nucleus", Liverpool, UK, July 28-30, 2015.

"Low Energy Nuclear Physics White Paper, Nuclear Science Advisory Committee to DOE/NSF" Long Range Planning Meeting, Washington, March, 2015.

"Exotic behavior at the limits of angular momentum" Invited seminar to the Physics Division, Argonne National Laboratory, April 21, 2014.

"Spin 60 and beyond: Exotic behavior at the limits of angular momentum and the Status of GRETINA" Invited talk at the Department of Physics, University of Jyvaskyla, Finland, Feb. 13, 2014.

"Nuclear Structure: Gamma-Ray Spectroscopy" An invited series of lectures at the 2013 UK Summer School for Nuclear Physics, Bristol, England Aug 26th to Sept 7, 2013.

"Spin 60 and beyond: Exotic behavior at the limits of angular momentum in the N=90 region" Invited talk at the Department of Physics, University of Lund, Sweden, Sep. 17, 2013.

"GRETINA: Early results from the physics campaign at NSCL and plans for the future" Invited talk at the 3rd EGAN workshop, Liverpool, UK, on June 24-27, 2013.

"Strongly-Deformed Rotational Structures at Ultra-High Spin near N = 90: Spin 60 and beyond" Invited talk at the International Gordon Research Conference on Nuclear Chemistry, June 9-14, 2013, Colby-Sawyer College, New London, NH.

"The Future of Scholarly Publishing" invited talk at the Faculty Luncheon Series at Florida State University, Dec. 2012.

"High Spin Nuclear Structure" invited talk at the "Tastes of Physics 2012" Nuclear Physics Workshop held at the University of the Western Cape, Cape Town, South Africa, November 14-16, 2012.

"Exotic Behavior at Ultrahigh Spin Values in Light Rare-Earth N~90 Nuclei" Invited talk at the Fifth International Conference on Fission and Properties of Neutron Rich Nuclei, Sanibel Island, FL, November 4-10, 2012.

"Nuclear Collectivity" invited "Dinner Speaker"at the Nuclear Structure International Conference held at Argonne National Laboratory, Chicago, August 13th - 17th, 2012.

"The Fascinating Behaviour of N~90 Erbium Nuclei at Ultra-High Spin"
invited talk at the Recent Results in Nuclear Physics Workshop held at The University of the West of Scotland, June 9, 2010.

"The Physics of GRETINA" invited talk at the SuperUser Meeting held at Michigan State University, Aug. 2011.

"The Fascinating Gamma-Ray World of the Atomic Nucleus: The Revolution Continues."
invited colloquium at The Department of Physics, Mississippi State University, April 21, 2010.

"Status of GRETINA and Gamma-Ray Studies with GRETA at FRIB"
invited talk at the Step Forward to FRIB Workshop at Argonne National Laboratory, May 30-31, 2009.

"Strongly deformed nuclear shapes at ultra-high spins and shape co-existence in N~90 nuclei"
invited talk at the 43rd Zakopane Conference on Nuclear Physics, September 1-7, 2008, Zakopane, Poland.

"Triaxal strongly deformed structures near A=160 at ultra-high spin and the status of GRETINA"
invited talk at the International Conference on Highlights in Nuclear Structure for Bernard Haas’ Diamond Anniversary, May 12-13, 2008, École Nationale Supérieure de Chimie de Paris.

"New developments at ultrahigh spin in N~90 Er, Tm and Yb nuclei"
invited talk at the Frontiers of Basic and Applied Nuclear Science, 235th ACS National Meeting, New Orleans, LA, April 6-10, 2008 ACS New Orleans, April 08, DIVISION OF NUCLEAR CHEMISTRY & TECHNOLOGY.

"The Highest Spins"
invited talk at the International Conference on PRESENT AND FUTURE EXOTICS IN NUCLEAR PHYSICS, Niels Bohr Institute, Copenhagen, Denmark, February 28-29 2008.

Summer School Lecture Series

Conference Summary and Outlook
invited talk at the Nuclear Structure 2010 International Conference held at Berkeley, CA, August 8th-13th, 2010.

Nuclear Structure: Experiment.
An invited series of lectures at the Exotic Beams Nuclear Physics Summer School, LBNL, Berkeley Aug. 2009