10-16 June 2018
Dalhousie University
America/Halifax timezone
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Determination of proton radii of neutron rich oxygen isotopes from charge-changing cross section measurements. (G)*

11 Jun 2018, 14:45
15m
SUB 302 (cap.40) (Dalhousie University)

SUB 302 (cap.40)

Dalhousie University

Oral Competition (Graduate Student) / Compétition orale (Étudiant(e) du 2e ou 3e cycle) Nuclear Physics / Physique nucléaire (DNP-DPN) M2-5 Nuclear Structure I (DNP) | Structure nucléaire (DPN)

Speaker

Satbir Kaur (Dalhousie University)

Description

Charge radius is an important bulk property of the nucleus for investigating nuclear structure. The nuclei lying close to the boundaries of the nuclear chart (the drip lines) have revealed new features like halo and skin. Another new phenomenon that has emerged in the neutron-rich region is the changing or vanishing of magic numbers [1,2]. The knowledge of proton radii is crucial for understanding the halo and skin formation and also the shell evolution in unstable nuclei. The systematic study of proton radii along an isotope chain, together with knowledge of the matter radii is important to deduce the neutron skin thickness in the neutron-rich nuclei. Furthermore, the proton radii are crucial to understand the spatial correlation between halo neutrons and its core nucleus. Proton radii also serve as a test of newly developed structure models including those based on $ab$ $initio$ theory. Charge-changing cross section ($\sigma_{cc}$) is the total cross section for the change of the atomic number of the projectile nucleus. It is a new method to extract the proton radii of neutron-rich nuclei using the Glauber model analysis. The proton radii of \textsuperscript{12-17}B [3] and \textsuperscript{12-19}C [4] have been successfully determined using the charge-changing cross section measurements. The neutron-rich oxygen isotopes are particularly interesting nuclei, with a new magic number (N=16) at the neutron drip line [5]. The proton radii of neutron-rich oxygen isotopes have not been measured til date. We, therefore, performed an experiment at Fragment Separator (FRS) in Germany using relativistic beams of \textsuperscript{16-24}O with energy around 900 MeV/u. In this talk, I will present the preliminary results of $\sigma_{cc}$ measurements of \textsuperscript{16-24}O.

References
[1] A. Ozawa et al., Phys. Rev. Lett. 84, 5493 (2000).
[2] R. Kanungo et al., Phys. Lett. B 528, 58 (2002).
[3] A. Estrade ́ et al., Phys. Rev. Lett. 113, 132501 (2014).
[4] R. Kanungo et al. Phys. Rev. Lett. 117, 102501 (2016).
[5] C. R. Hoffman et al., Phys. Rev. Lett. 100, 152502 (2008).

Primary author

Satbir Kaur (Dalhousie University)

Co-authors

Rituparna Kanungo (Saint Mary's University) Dr Wataru HORIUCHI (Hokkaido University) FREDERIC Ameil (GSI Helmholtzzentrum fu ̈r Schwerionenforschung) J. Atkinson (Saint Mary's University, Halifax) Dr AYYAD LIMONGE, Yassid (NSCL) Dr Soumya BAGCHI (Saint Mary's University, Halifax and GSI, Darmstadt, Germany) D. CORTINA-GIL (Universidad de Santiago de Compostela) Iris Dillmann Alfredo Estrade (NSCL, Michigan State University) Alexei EVDOKIMOV ((GSI Helmholtzzentrum fu ̈r Schwerionenforschung, Germany) Fabio FARINON (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) Hans GEISSEL (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) G. GUASTALLA (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) R. Janik (Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia) Ronja KNOBEL (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) J. KURCEWICZ (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) Yuri LITVINOV (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) Michele MARTA (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) M. Mostazo (Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain) Ivan MUKHA (Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain) Chiara NOCIFORO (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) Jin ONG (RCNP, Osaka University, Mihogaoka, Ibaraki, Osaka 567 0047, Japan) Stephane PIETRI (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) Andrej PROCHAZKA (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) C. SCHEIDENBERGER (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) Branislav SITAR (Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia) Peter STRMEŇ (Faculty of Mathematics and Physics, Comenius University, 84215 Bratislava, Slovakia) Maya TAKECHI (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) Junki TANAKA (Research Center for Nuclear Physics) Isao Tanihata (Argonne National Laboratories) S. TERASHIMA (School of Physics and Nuclear Energy Engineering and IRCNPC, Beihang University, Beijing 100191, China) Jossittwilliams VARGAS (Universidad de Santiago de Compostela, E-15706 Santiago de Compostella, Spain) Helmut WEICK (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany) John Stuart WINFIELD (GSI Helmholtzzentrum fu ̈r Schwerionenforschung, D-64291 Darmstadt, Germany)

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