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Centre of Excellence

NUCLEAR INTERACTIONS AND HADRONIC MATTER

Project Title:	*Advanced Studies on Structure and Dynamics of Exotic Nuclei*
Financing agency:	CNCS - UEFISCDI, Program IDEI
Project Type/Code:	Exploratory Research Project / PN-II-ID-PCE-2011-3-0153
Contract Number	5 / 05.10.2011
Project Summary:	*Summary:* The study of the structure and dynamics of exotic nuclei both theoretically and experimentally is nowadays one of the most active fields of research in nuclear physics. The nuclei with unusual N/Z ratios are proper candidates to get insight into the fundamental interactions and symmetries. These nuclei have relevance for nucleosynthesis and significance for astrophysical scenarios concerning the rp-process and the r-process path. The proton-rich nuclei in the A~70 mass region and the neutron-rich nuclei in the A~100 region manifest shape coexistence and mixing. A self-consistent description of their structure and decay requires theoretical methods going beyond the mean field approaches as well as realistic effective interactions and large model spaces. In the present project microscopic many-body approaches belonging to the Vampir-Monster model family will be used to address essential questions concerning the structure and dynamics of exotic nuclei and tests of fundamental interactions and symmetries. An essential step on the way to achieve a realistic description of exotic nuclei will be the systematic derivation of suitable effective nucleon-nucleon interactions for particular mass regions and their extrapolations to proton- and neutron-drip lines. These investigations are important for the science program at the existing and future Radioactive Isotope Beams facilities, such us SPIRAL2 at GANIL, NUSTAR at FAIR/GSI, FRIB at MSU, RIKEN in Japan. *Domain of the project:* Domain: PE. MATHEMATICS, PHYSICAL SCIENCES, INFORMATION AND COMMUNICATION, ENGINEERING, UNIVERSE AND EARTH SCIENCES Subdomain: PE2. Fundamental constituents of matter: particle, nuclear, plasma, atomic, molecular, gas, and optical physics Main Research Area: PE2_3. Nuclear physics Secondary Research Area: PE2_1. Fundamental interactions and fields *Keywords:* exotic nuclei; shape coexistence; beta decay; beyond-mean-field approaches; realistic effective interactions *Objectives/Activities:* - Derivation of an effective interaction constructed from a nuclear matter G-matrix based on modern forces in a large model space adequate for neutron-rich nuclei in the A~100 mass region. - Self-consistent investigations of spectroscopic properties of even-even nuclei with neutron number N~60 aiming to a realistic description of shape coexistence phenomena identified experimentally. - Beyond-mean-field description of the Gamow-Teller beta decay strength distributions and half-lives for proton-rich nuclei in the A~70 mass region and neutron-rich nuclei in the A~100 region and comparison with the data obtained using a Total Absorption Spectrometer. - Identification of two-body correlations relevant for the structure and dynamics of proton-rich nuclei in the A~70 region. - Self consistent investigation of structure and dynamics of exotic nuclei with close to extreme N/Z ratio aiming to testing the fundamental interactions and symmetries. *Project leader:* Alexandrina Petrovici E-mail address: spetro@nipne.ro *Project team:* Alexandrina Petrovici, CS1, Amalia Pop, CS1, Oana Andrei, CS, Cristian Andrei, CS *Host institution of the project:* Institution name: Horia Hulubei National Institute for R&D in Physics and Nuclear Engineering Institution address: 30 Reactorului St., Magurele, jud. Ilfov, P.O.B. MG-6, RO-077125, Romania
Workplan of the project:	2011 2012 2013 2014 2015 2016	Unique Report : 15.12.2011 Unique Report : 15.12.2012 Unique Report : 15.12.2013, Scientific synthetic report 2011- 2013 Unique Report : 15.12.2014, Unique Report : 15.12.2015, Unique Report : 30.09.2016, Scientific syntetic report 2011 - 2016
Results:	List of publications 1. Triple shape coexistence and shape evolution in the N = 58 Sr and Zr isotopes, A. Petrovici, Phys. Rev. C 85, 034337 (2012) 2. Shape isomerism and shape coexistence effects on the Coulomb energy differences in the N = Z nucleus ⁶⁶As and neighboring T = 1 multiplets, G. de Angelis, K.T. Wiedemann, T. Martinez, R. Orlandi, A. Petrovici, E. Sahin, J.J. Valiente-Dobon, D. Tonev, S. Lunardi, B. S. Nara Singh, R. Wadsworth, A. Gadea, K. Kaneko, P.G. Bizzeti, A. M. Bizetti-Sona, B. Blank, A. Bracco, M. P. Carpenter, C.J. Chiara, E. Farnea, A. Gottardo, J. P. Green, S. M. Lenzi, S. Leoni, C.J. Lister, D. Mengoni, D.R. Napoli, O.L. Pechenaya, F. Recchia, W. Reviol, D.G. Sarantities, D. Seweryniak, C.A. Ur, and S. Zhu Phys. Rev. C 85, 034320 (2012) 3. Shape coexistence, shape evolution and Gamow-Teller beta-decay of neutron-rich A~100 nuclei, A. Petrovici, K.W. Schmid, and A. Faessler, AIP Conf. Proc. 1498, 38 (2012) 4. Exotic structure and decay of medium mass nuclei near the drip lines, A. Petrovici, K.W. Schmid, A. Faessler J. Phys.: Conf. Ser. 413, 012007 (2013) 5. Total absorption study of the beta decay of ^102,104,105Tc, D. Jordan, A. Algora, J. L. Tain, B. Rubio, J. Agramunt, A. B. Perez-Cerdan, F. Molina, L. Caballero, E. Nacher, A. Krasznahorkay, M. D. Hunyadi, J. Gulyas, A. Vitez, M. Csatlos, L. Csige, J. Aysto, H. Penttila, I. D. Moore, T. Eronen, A. Jokinen, A. Nieminen, J. Hakala, P. Karvonen, A. Kankainen, A. Saastamoinen, J. Rissanen, T. Kessler, C. Weber, J. Ronkainen, S. Rahaman, V. Elomaa, U. Hager, S. Rinta-Antila, T. Sonoda, K. Burkard, W. Huller, L. Batist, W. Gelletly, A. L. Nichols, T. Yoshida, A. A. Sonzogni, K. Perajarvi, A. Petrovici, K. W. Schmid, and A. Faessler, Phys. Rev. C 87, 044318 (2013) 6. Isospin-mixing effects on the structure and dynamics of medium mass nuclei, A. Petrovici, Rom. Journ. Phys. 58, no. 9-10, 1120 (2013) 7. Shape evolution and Gamow-Teller beta-decay of neutron-rich A~100 nuclei within beyond-mean-field approach, A. Petrovici, EPJ Web of Conf., 63, 01012 (2013) 8. Exotic structure and decay of medium mass nuclei near the drip lines, A. Petrovici, Hellenic Nuclear Physics Society, Proceedings HNPS2013, 59 (2014), online at: http://nuclpart.phys.uoa.gr/HNPS/Files/ANP2013.pdf 9. Isospin-symmetry breaking and shape coexistence in A~70 analogs, A. Petrovici, Phys. Rev. C 91, 014302 (2015) 10. Isospin-symmetry breaking effects in A~70 nuclei within beyond-mean-field approach, A. Petrovici, O. Andrei, AIP Conf. Proc. 1645, 21 (2015) 11. Stellar weak interaction rates and shape coexistence for ⁶⁸Se and ⁷²Kr waiting points, A. Petrovici and O.Andrei, Eur. Phys. J. A 51, 133 (2015) 12. Weak interaction rates and shape coexistence for the Z=N+2 isotopes ⁷⁰Kr and ⁷⁴Sr, A. Petrovici and O.Andrei, Phys. Rev. C 92, 064305 (2015) 13. Isospin-symmetry breaking and shape coexistence in A~70 analogs, A. Petrovici, J. Phys. Conf. Ser. 724, 012038 (2016) 14. Shape Coexistence Effects on Stellar Weak Interaction Rates of Proton-rich Nuclei within Beyond-mean-field Approach, A. Petrovici and O. Andrei, will appear in AIP Conf. Proc. (2016) 15. Lifetime measurements in 100Ru, T. Konstantinopoulos, P. Petkov, A. Petrovici, et al, Phys. Rev. C 95, 014309 (2017) List of talks 1. Nucleon-nucleon correlations in exotic nuclei, A. Petrovici (in collaboration with O. Andrei), invited talk at Structure and Reactions for Exotic Nuclei (SARFEN) Meeting, Trento, Italy, March 26-27, 2012 2. Shape coexistence, shape evolution and Gamow-Teller beta-decay of neutron-rich A~100 nuclei, A. Petrovici (in collaboration with K.W. Schmid, A. Faessler), invited talk at Carpathian Summer School of Physics. Exotic Nuclei and Nuclear/Particle Astrophysics (IV). From Nuclei to Stars, Sinaia, Romania, June 24 - July 7, 2012 3. Exotic structure and decay of medium mass nuclei near the drip lines, A. Petrovici (in collaboration with O. Andrei, K.W. Schmid, A. Faessler), invited lecture at International Summer School for Avanced Studies on Dynamics of open nuclear systems, Predeal, Romania, July 9-20, 2012 4. Shape coexistence in neutron-rich A~100 nuclei within beyond-mean-field approach, A. Petrovici (in collaboration with K.W. Schmid, A. Faessler), overview talk at 2^ndEuropean Nuclear Physics Conference (EuNPC2012), Bucharest, Romania, September 17-21, 2012 5. Shape coexistence and shape evolution in neutron-rich A~100 nuclei, A. Petrovici (in collaboration with O. Andrei), talk at ISOLDE Workshop and Users meeting 2012, CERN-Geneva, Switzerland, December 17-19, 2012 6. Shape evolution and Gamow-Teller beta-decay of neutron-rich A~100 nuclei within beyond-mean-field approach, A. Petrovici (in collaboration with O. Andrei), talk at Heavy Ion Accelerator Symposium on Fundamental and Applied Science (HIAS2013), Canberra, Australia, April 8-12, 2013 7. Exotic structure and decay of medium mass nuclei near the drip lines, A. Petrovici (in collaboration with K.W. Schmid), invited talk at 22^nd Symposium of the Hellenic Nuclear Physics Society (HNPS2013), University of Athens, Greece, May 31 - June 01, 2013 8. Exotic structure and decay of medium mass nuclei near the drip lines within beyond-mean-field approach, A. Petrovici (in collaboration with K.W. Schmid), invited talk at Nuclear Structure Physics with Advanced Gamma-Detector Arrays (NSP13), Padova, Italy, June 10-12, 2013 9. Shape-coexistence effects on the structure and dinamics of A~70 proton-rich nuclei within beyond-mean-field approach, A. Petrovici (in collaboration with O. Andrei, K.W. Schmid), invited talk at From nuclear structure to particle-transfer reactions and back, ECT^, Trento, Italy, November 4-8, 2013 10. Exotic structure and decay within beyond-mean-field approach, A. Petrovici* (in collaboration with O. Andrei), invited talk at TAS Collaboration Workshop: Status and Perspectives, Valencia, Spain, June 26-28, 2014 11. Isospin-symetry-breaking effects in A~70 nuclei within beyond-mean-field approach, A. Petrovici (in collaboration with O. Andrei), invited talk at the Carpathian Summer School of Physics 2014, Sinaia, Romania, July 13-26, 2014 12. Isospin-symmetry-breaking and shape-coexistence effects in A~70 analogs within beyond-mean-field approach A. Petrovici (in collaboration with O. Andrei), invited talk at From nuclear structure to particle-transfer reactions and back II, ECT, Trento, Italy, November 10-14, 2014 13. Isospin-symmetry-breaking and shape-coexistence effects on structure and dynamics of medium mass nuclei, A.Petrovici* (in collaboration with O. Andrei), talk at LIA Romania-France workshop, Magurele, Romania, December 3-5, 2014 14. Coexistence phenomena in neutron-rich A~100 nuclei within beyond mean field approach, A. Petrovici, invited talk at 3rd EXILL Workshop, Orsay, France, January 22-23, 2015 15. Isospin-symmetry breaking and shape coexistence in A~70 analogs A. Petrovici, invited talk at XXI International School on Nuclear Physics and Applications & International Symposium on Exotic Nuclei (2015), Varna, Bulgaria, September 06-12, 2015 16. Realistic description of isospin-related phenomena in A~70 analogs A. Petrovici, seminar at CSNSM, Orsay, Paris, November 13, 2015 17. Beyond-mean-field description of shape coexistence phenomena in neutron-rich A~100 nuclei, A. Petrovici, invited talk at EXILL Collaboration Meeting - Bormio, Italy, February 22, 2016 18. Stellar weak interaction rates and shape coexistence for A~70 proton-rich nuclei within beyond-mean-field approach, A. Petrovici, (in collaboration with O. Andrei), invited talk at III^rdTopical Workshop on Modern Aspects in Nuclear Structure: The Many Facets of Nuclear Structure, Bormio, Italy, February 22-28, 2016 19. From isospin mixing to stellar weak interaction rates within beyond-mean-field approach, A. Petrovici, (in collaboration with O. Andrei), invited talk at NUSTAR Annual Metting 2016, GSI Darmstadt, Germany, February 29 - March 4, 2016 20. Shape coexistence effects on isospin-symmetry breaking and beta decay of proton-rich A~70 nuclei, A. Petrovici, (in collaboration with O. Andrei, C. Andrei and A. Pop), talk at NUSPIN 2016 Workshop of the Nuclear Spectroscopy Instrumentation Network and AGATA Physics Workshop, Venice, Italy, June 27- July 1, 2016 21. Shape coexistence effects on stellar weak interaction rates of proton-rich nuclei within beyond-mean-field approach, A. Petrovici, (in collaboration with O. Andrei), invited talk at Carpathian Summer School of Physics. Exotic Nuclei and Nuclear/Particle Astrophysics (VI). Physics with small accelerators, Sinaia, Romania, June 26 - July 9, 2016 22. From Isospin-related Phenomena to Stellar Weak Processes within Beyond - mean - field Approach, A. Petrovici, (in collaboration with O. Andrei, C. Andrei and A. Pop), talk at Nuclear Structure 2016, Knoxville, Tennessee, USA, July 24-29, 2016