Darek Seweryniak   (630) 252-1514 FAX: (630) 252-2864 seweryniak@anl.gov

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 Publications

[1] "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)

[2] "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)

[3] "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)

[4] "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)

[5] "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)

[6] "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)