Darek Seweryniak   (630) 252-1514 FAX: (630) 252-2864 [email protected]

Education

High School	Stanislaw Malachowski High School, Plock, Poland
M.Sc.	Warsaw University,	1987
Ph.D.	Lund University/Warsaw University "Experimental Studies of Nuclei Near Doubly Magic 100Sn"	1994

Career

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

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 [1,5],
• nuclei spontaneously emitting protons [2],
• levels above the proton threshold in light proton-rich nuclei, which are situated along the path of the astrophysical rapid proton-capture process [3,4],
• isomers in very heavy transfermium nuclei [6].

All these experiments were performed using the GAMMASPHERE array of gamma-ray detectors and the Argonne Fragment Mass Analyzer.

Recent Invited Talks

"Recent spectroscopic results near the Z=100, N=152 Closed Shells",
International Symposium on Super Heavy Nuclei 2015, Texas A&M University, College Station, Texas, USA, March 31-April 2, 2015

"Studies of exotic nuclei with Gammasphere and the Fragment Mass Analyzer",
5th International Conference on Proton-Emitting Nuclei (PROCON015), Lanzhou, China, July 6-10, 2015

"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] "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.

[2] "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)

[3] "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

[4] "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)

[5] "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)

[6] "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)

[7] "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(R)/1-5 (2007)

[8] "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(R)/1-3 (2006)

[9] "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)