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Dariusz Seweryniak

Physicst - Experimental

Biography

Education

Stanislaw Malachowski High School, Plock, Poland

M.Sc. University of Warsaw, 1987

Ph.D. Uppsala University/Warsaw University, 1994
Experimental Studies of Nuclei Near Doubly Magic 100Sn”

Employment

Postdoctoral Appointee, Argonne National Laboratory/University of Maryland, 1995-1997

Assistant Physicist, Argonne National Laboratory/University of Maryland, 1998-2000

Assistant Physicist, Argonne National Laboratory, 2001-2002

Physicist, Argonne National Laboratory, 2003-now

Honors

co-Chair Nuclei at the Limits” Conference, Argonne, IL, USA, 2004

Director, 16th Exotic Beam Summer School, Argonne, IL, USA, 2017

Research Interests

I study properties of unstable nuclei located far from the line of beta stability. ATLAS with its high-quality intense beams of heavy ions is an ideal tool for producing nuclei with excess of protons. Listed below are recent experimental examples related to:

  • the doubly-magic 100Sn nucleus [2,6,10],
  • nuclei spontaneously emitting protons [1, 7],
  • levels above the proton threshold in light proton-rich nuclei, which are situated along the path of the astrophysical rapid proton-capture process [5,8,9],
  • very heavy transfermium nuclei [3,4,11].

I run most of my experiments with the Fragment Mass  Analyzer (FMA) or the Argonne Gas-Filled Analyzer (AGFA) stand-alone an coupled to the gamma-ray arrays Gammasphere or GRETINA.

Recent Invited Talks

Superallowed alpha decay to doubly-magic 100Sn”, 5th Topical Workshop on Modern Aspects in Nuclei, February 4-8, 2020, Bormio, Italy

First spectroscopic results on trans-fermium nuclei with Argonne Gas-Filled Analyzer and Gammasphere”, 4th International Symposium on Superheavy Elements, December 1-5, 2019, Hakone, Japan

Recent studies of exotic nuclei near the self-conjugate doubly-magic nucleus 100Sn”, 2019 Fall Meeting of the APS DNP, October 14-17, Crystal City, VA

Superallowed alpha decay into doubly magic 100Sn”, Symposium on Fundamentals of Nuclear Particle Decay”, August 28-30, 2019, Stockholm, Sweden

Superallowed alpha decay into doubly magic 100Sn”, International Nuclear Physics Conference, July 29-August 2, 2019, Glasgow, UK

First Spectroscopic Results on Trans-Fermium Nuclei with the Argonne Gas-Filled Analyzer”, Gordon Research Conference on Nuclear Chemistry, June 16-21, 2019, New London, NH

Recent studies of proton and alpha emission near 100Sn at ATLAS”, International Conference on Proto-Emitting Nuclei, PROCON 2019, June 3-7, 2019, East Lansing, MI

Superallowed alpha decay to doubly-magic 100Sn”, International Conference on Nuclear Structure and Dynamics, 13-17 May, 2019, Venice, Italy

Towards In-beam Spectroscopy of the Heaviest Nuclei with Gammasphere and AGFA”, 5th Joint Meeting of the  APS Division of Nuclear Physics and the Physical Society of Japan, October 23-27, 2018, Waikoloa, HI

Nuclear structure studies of transfermium nuclei”, Humboldt Kolleg, Interfacing Structure and Reaction Dynamics in the Synthesis of the Heaviest Nuclei, Trento, Italy September 1-4, 2015

Selected Recent Publications

[1] Proton decay of 108I and its significance for the termination of the astrophysical rp-process”,  K.Auranen, D.Seweryniak, M.Albers, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, C.J.Chiara, P.Copp, H.M.David, D.T.Doherty, J.Harker, C.R.Hoffman, R.V.F.Janssens, T.L.Khoo, S.A.Kuvin, T.Lauritsen, G.Lotay, A.M.Rogers, C.Scholey, J.Sethi, R.Talwar, W.B.Walters, P.J.Woods, and S.Zhu, Phys. Lett. B 792, 187192 (2019)

[2] Superallowed alpha decay to doubly magic 100Sn”,
K. Auranen, D. Seweryniak, M. Albers, A. D. Ayangeakaa, S. Bottoni, M.P. Carpenter, C.J. Chiara, P. Copp, H.M. David, D.T. Doherty, J. Harker, C.R. Hoffman, R.V.F. Janssens, T.L. Khoo, S.A. Kuvin, T. Lauritsen, G. Lotay, A.M. Rogers, J. Sethi, C. Scholey, R. Talwar, W.B. Walters, P.J. Woods, and S. Zhu, Phys. Rev. Lett. 121, 182501 (2018)

[3] Decay and fission hindrance of two- and four-quasiparticle K isomers in 254Rf”,
H.M. David, J. Chen, D. Seweryniak, F.G. Kondev, J.M. Gates, K.E. Gregorich, I. Ahmad, M. Albers, M. Alcorta, B.B. Back, B. Baartman, P.F. Bertone, L.A. Bernstein, C.M. Campbell, M.P. Carpenter, C.J. Chiara, R.M. Clark, M. Cromaz, D.T. Doherty, G.D. Dracoulis, N.E. Esker, P. Fallon, O. Gothe, J.P. Greene, P.T. Greenlees, D.J. Hartley, K. Hauschild, C.R. Hoffman, S.S. Hota, R.V.F. Janssens, T.L. Khoo, J. Konki, J.T. Kwarsick, T. Lauritsen, A.O. Macchiavelli, P.T. Mudder, C. Nair, Y. Qiu, J. Rissanen, A.M. Rogers, P. Ruotsalainen, G. Savard, S. Stolze, A. Wiens, and S. Zhu, accepted for publication in Phys. Rev. Lett., 115, 132502 (2015)

[4] Fission Barrier of Superheavy Nuclei and Persistence of Shell Effects at High Spin: Cases of 254No and 220Th”,
Greg Henning, T. L. Khoo, A. Lopez-Martens, D. Seweryniak, M. Alcorta, M. Asai, B. B. Back, P. F. Bertone, D. Boilley, M. P. Carpenter, C. J. Chiara, P. Chowdhury, B. Gall, P. T. Greenlees, G. Gürdal, K. Hauschild, A. Heinz, C. R. Hoffman, R. V. F. Janssens, A. V. Karpov, B. P. Kay, F. G. Kondev, S. Lakshmi, T. Lauritsen, C. J. Lister, E. A. McCutchan, C. Nair, J. Piot, D. Potterveld, P. Reiter, A. M. Rogers, N. Rowley, and S. Zhu, Phys. Rev. Lett., 113, 262505 (2014)

[5] Structure of Resonances in the Gamow Burning Window for the 25Al(p,γ)26Si Reaction in Novae”,
D. T. Doherty, P. J. Woods, D. Seweryniak, M. Albers, A. D. Ayangeakaa, M. P. Carpenter, C.J. Chiara, H. M. David, J. L. Harker, R. V. F. Janssens, A. Kankainen, C. Lederer, and S. Zhu, accepted for publication in Phys. Rev. C

[6] Single-Neutron States in 101Sn”,
D. Seweryniak, M. P. Carpenter, S. Gros, A. A. Hecht, N. Hoteling, R. V. F. Janssens, T. L. Khoo, T. Lauritsen, C. J. Lister, G. Lotay, D. Peterson, A. P. Robinson, W. B. Walters, X. Wang, P. J. Woods, and S. Zhu, Phys. Rev. Lett. 99, 022504/1-4 (2007)

[7] Effect of a Triaxial Nuclear Shape on Proton Tunneling: the Decay and Structure of 145Tm”
D. Seweryniak, B. Blank, M. P. Carpenter, C. N. Davids, T. Davinson, S. J. Freeman, N. Hammond, N. Hoteling, R. V. F. Janssens, T. L. Khoo, Z. Liu, G. Mukherjee, A. Robinson, C. Scholey, S. Sinha, J. Shergur, K. Starosta, W. B. Walters, A. Woehr, and P. J. Woods, Phys. Rev. Lett. 99, 082502/1-4 (2007)

[8] First in-beam gamma-ray spectroscopy study of 24Al and its implications for the astrophysical 23Mg(p,gamma)24Al rate in ONe novae”
G. Lotay, P. J. Woods, D. Seweryniak, M. P. Carpenter, N. Hoteling, R. V. Janssens, D. G. Jenkins, T. Lauritsen, C. J. Lister, A. Robinson, and S. Zhu, Phys. Rev. C 77, 042802 (2008)

[9] Level Structure of 26Si and its Implications for the Astrophysical Reaction Rate of 25Al(p,gamma)26Si”
D. Seweryniak, P. J. Woods, M. P. Carpenter, T. Davinson, R. V. F. Janssens, D. G. Jenkins, T. Lauritsen, C. J. Lister, J. Shergur, S. Sinha, and A. Woehr, Phys. Rev. C75, 062801®/1-5 (2007)

[10] Alpha Decay of 105Te”,
D. Seweryniak, K. Starosta, C. N. Davids, S. Gros, A. A. Hecht, N. Hoteling, T. L. Khoo, K. Lagergren, G. Lotay, D. Peterson, A. Robinson, C. Vaman, W. B. Walters, P. J. Woods, and S. Zhu, Phys. Rev. C73, 061301®/1-3 (2006)

[11] K-Isomers in 254No: Probing Single Particle Energies and Pairing Strengths in the Heaviest Nuclei”,
S. K. Tandel, T. L. Khoo, D. Seweryniak, G. Mukherjee, I. Ahmad, B. Back, R. Blinstrup, P. A. Butler, M. P. Carpenter, J. Chapman, P. Chowdhury, C. N. Davids, P. T. Greenlees, A. A. Hecht, A. Heinz, R.-D. Herzberg, P. Ikin, R. V. F. Janssens, G. D. Jones, F. G. Kondev, T. Lauritsen, C. J. Lister, E. F. Moore, D. Peterson, P. Reiter, U. S. Tandel, X. F. Wang, and S. F. Zhu, Phys. Rev. Lett. 97, 082502/1-4 (2006)