Alexandre OBERTELLI

CEA Saclay - Service de Physique nucléaire

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Fonction

Physicien

 

Sujets de recherche

 

Projets en cours

 

CV

2016-2021: lauréat d'une bourse ERC pour le projet PUMA

 

2013-2014: séjour longue durée au RIKEN Nishina Center (JSPS fellowship)

 

2011: Habilitation à Diriger des Recherches, Université Paris Sud.

 

2010-2015: lauréat d'une bourse ERC pour le projet MINOS

 

2006-today: physicien  au CEA - Saclay, Service de Physique Nucléaire (SPhN).

 

2005-2006: postdoctorat au National Superconducting Cyclotron Laboratory (NSCL), Michigan State University (MSU) dans le groupe de spectroscopie gamma. Réactions de "knockout" et excitation coulombienne de noyaux exotiques.

 

2002-2005: thèse au CEA - Saclay, Service de Physique Nucléaire (SPhN).

 

 

Publications scientifiques

2017

Are there signatures of harmonic shells far from stability? First spectroscopy of 110Zr

N. Paul et al., accepted for publication in Phys. Rev. Lett.  (2016)

 

2016

Nuclear Structure from Direct Reactions with Rare Isotopes : Observables, Methods and Highlights,

A. Obertelli, Eur. Phys. J. Plus, 131, 319 (2016)

 

Superdeformed and triaxial states in 42Ca

K. Hadynska-Klek et al., Phys. Rev. Lett. 117, 062501 (2016)

 

Spectroscopy of 7He using 9Be(6He,8Be) transfer reaction

F. Renzi et al., Phys. Rev. C 94, 024619 (2016)

 

Experimental study of the knockout reaction mechanism using 14O at 60 MeV/nucleon

Y. Sun et al., Phys. Rev. C 93, 044607 (2016)

 

2015

Extension of the N=40 Island of Inversion towards N=50: Spectroscopy of 66Cr, 70,72Fe

C. Santamaria et al., Phys. Rev. Lett. 115, 192501 (2015)

 

New findings on structure and production of 10He from 11Li with the (d, 3He) reaction

A. Matta et al., Physical Review C 92, 041302 (2015)

 

Probing collectivity in Zn isotopes with one particle or hole outside the N=40 subshell closure

I. Celikovic et al., Physical Review C 91, 044311 (2015)

 

Neutron-driven collectivity in light tin isotopes: Proton inelastic scattering from Sn-104

A. Corsi et al., Physics Letters B 743, 451 (2015)

 

Shell evolution beyond N=40: Cu-69,Cu-71,Cu-73

E. Sahin et al., Physical Review C 91, 034302 (2015)

 

Exploring the most exotic nuclei with MINOS at the RIBF

A. Obertelli, T. Uesaka, Nuclear Physics News 25, 17 (2015)

 

2014:

Intermediate-energy Coulomb excitation of 104Sn: Persistent E2 strength enhancement approaching 100Sn

P. Doornenbal et al., Physical Review C 90, 061302 (2014)

 

Direct reactions with exotic nuclei

A. Obertelli, EPJ Web of conferences 66, 01014 (2014).

 

MINOS: avertex tracker coupled to a thick liquid hydrogen target for in-beam spectroscopy of exotic nuclei

A. Obertelli et al., Eur. Phys. J. A 50, 8 (2014). 

 

Experimental study of the two-body spin-orbit force in nuclei

G. Burgunder et al., Phys. Rev. Lett. 112, 042502 (2014). 

 

The PRESPEC liquid-hydrogen target for in)beam gamma spectroscopy of exotic nuclei at GSI

C. Louchart et al., Nucl. Instr; Meth. A 736, 81 (2014). 

 

MUSETT: a segmented Si array for recoil-decay-tagging studies at VAMOS

Ch. Theisen et al., Nucl. Instr. Meth. A 747, 69 (2014). 

 

2013:

Spectroscopy of proton-rich 66Se uo to J=6+: isospin-breaking effect in the A=66 isobaric triplet

P. Ruotsalainen et al., Phys. Rev. C 88, 041308(R) (2013). 

 

Enhancing the sensitivity of recoil-beta tagging

J. Henderson et al., Jour. Instr. 8, P04025 (2013). 

 

Collectivity in light Ge and As isotopes

A. Corsi et al., Phys. Rev. C 88, 044311 (2013). 

 

Evaporation cost dependence in heavy-ion fragmentation

L. Audirac et al., Phys. Rev. C 88, 041602(R) (2013). 

 

Global properties of K hindrance probed by the gamma decay of the warm rotating 174W nucleus

V. Vandone et al., Phys. Rev. C 88, 034312 (2013). 

 

Windowless thin solid-hydrogen target: CHyMENE

A. Gillibert et al., Eur. Phys. Jour. A 49, 155 (2013). 

 

Coulomb excitation of 104Sn and the strength of the 100Sn shell closure

G. Guastalla et al., Phys. Rev. Lett. 110, 172501 (2013). 

 

Limited asymmetry dependence of correlations from single nucleon transfer

F. Flavigny et al., Phys. Rev. Lett. 110, 122503 (2013). 

 

Collective nature of low-lying excitations in 70,72,74Zn from lifetime measurements using the AGATA spectrometer demonstrator

C. Louchart et al., Phys. Rev. C 87, 054302 (2013). 

 

 

2012:

Nonsudden limits of heavy-ion induced knockout reactions

F. Flavigny, A. Obertelli et al., Phys. Rev. Lett. 108, 252501 (2012). 

 

AGATA-Advanced GAmma Tracking Array

S. Akkoyun et al., Nucl. Instr. Meth. Res. A 668, 26 (2012).

 

Systematic study of p-shell nuclei via single-nucleon knockout reactions

G. F. Grinyer et al., Phys. Rev. C 86, 024315 (2012).

 

Investigation of high-K states in 252No

B. Sulignano et al., Phys. Rev. C 86, 044318 (2012).

 

High-spin structure in 40K

P.-A. Soderstrom et al., Phys. Rev. C 86, 054320 (2012).

 

 

2011:

Hydrogen targets for exotic-nuclei studies developed over the past 10 years

A. Obertelli and T. Uesaka, Eur. Phys. Jour. A 47, 105 (2011).

 

Discharge studies in Micromegas detectors in low energy hadron beams

G. Charles et al., Nucl. Instr. Meth. Res. A 648, 174 (2011).

 

First spectroscopy of Se-66 and As-65: Investigating shape coexistence beyond the N=Z line

A. Obertelli et al., Phys. Lett. B 701, 417 (2011).

 

Lifetime measurements in Co-63 and Co-65

A. Dijon et al., Phys. Rev. C 83, 064321 (2011).

 

Knockout reactions from p-shell nuclei: tests of Ab Initio structure models

G.F. Grinyer et al., Phys. Rev. Lett. 106, 044306 (2011).

 

In-beam gamma spectroscopy of Mg-35 and Na-33

A. Gade et al., Phys. Rev. C 83, 044305 (2011).

 

2010:

Nucleon removal from unstable nuclei investigated via intranuclear cascade

C. Louchart, A. Obertelli, A. Boudard, F. Flavigny, Phys. Rev. C 83, 011601(R) (2010).

 

Lifetime measurements of excited states in neutron-rich Ar-44, Ar-46 populated via multinucleon transfer reaction

D. Mengoni et al., Phys. Rev. C 82, 024308 (2010).

 

Onset of collectivity in neutron-rich Fe isotopes: Toward a new island of inversion?

J. Ljungvall, A. Gorgen, A. Obertelli et al., Phys. Rev. C 81, 061301(R) (2010).

 

6He+9Be reactions at 16.8 MeV

M. Majer et al., Eur. Phys. J. A 43, 153-158 (2010).

 

 

2009:

Collective structure of the N=40 isotones

L. Gaudefroy, A. Obertelli, S. Peru, N. Pillet, S. Hilaire, J.-P. Delaroche, M. Girod, J. Libert, Phys. Rev. C 80, 064313 (2009).

 

Shape evolution in self-conjugate nuclei, and the transitional nucleus 68Se

A. Obertelli et al., Phys. Rev. C 80, 031304(R) (2009).

 

Shape of 44Ar: onset of deformation in neutron-rich nuclei near 48Ca

M. Zielinska et al., Phys. Rev. C 80, 014317 (2009).

 

Medium effects on intermediate-energy one-nucleon removal cross sections

F. Flavigny, A. Obertelli, I. Vidana, Phys. Rev. C 79, 064617 (2009).

 

Lifetime measurements of the neutron-rich N=30 isotones 50Ca and 51Sc: orbital dependence of effective charges in the fp shell

J.J. Valiente-Dobon et al., Phys. Rev. Lett. 102, 242502 (2009).

 

Mechanisms in knockout reactions

D. Bazin et al., Phys. Rev. Lett. 102, 232501 (2009).

 

Gamma-ray spectroscopy at the limits: first observation of rotationnal bands in 255Lr

S. Ketelhut et al., Phys. Rev. Lett. 102, 212501 (2009). 

 

The role of triaxiality for the coexistence and evolution of shapes in light krypton isotopes

M. Girod, J.-P. Delaroche, A. Goregen, A. Obertelli, Phys. Lett. B 676, 39 (20009).

 

 

2008:

In-beam gamma-spectroscopy at the proton dripline: 23Al

A. Gade et al., Phys. Lett. B 666, 218 (2008)

 

LaBr3/Ce scintillators for in-beam gamma-ray spectroscopy with fast beams of rare isotopes

D. Weisshaar et al., Nucl. Instr. and . Meth. A (2008)

 

Structure of excited states in 21Mg studied in one-neutron knockout

C. Aa. Diget et al., Phys. Rev. C 77, 064309 (2008)

 

In-beam gamma-spectroscopy and inclusive two-proton knockout cross section measurements at N=40

P. Adrich et al., Phys. Rev. C 77, 054306 (2008)

 

Reduction of spectroscopic strength: weakly-bound and strongly-bound single-particle states studied using one-nucleon knockout reactions

A. Gade et al., Phys. Rev. C 77, 044306 (2008)

 

Shape coexistence in light Se isotopes: evidenec for oblate shapes

J. Ljungvall, A. Görgen et al., Phys. Rev. Lett. 100, 102502 (2008).

 

First measurement of the giant monopole and quadrupole resonances in a short-lived nucleus: 56Ni

C. Monrozeau et al., Phys. Rev. Lett. 100, 042501 (2008).

 

2007:

Spectroscopy of 20Mg: The isobaric mass multiplet equation for the 2+ states of the A=20, T=2 quintet and distant mirror nuclei

A. Gade et al., Phys. Rev. C 76, 024317 (2007)

 

Resonance state in 7H

M. Caamano et al., Phys. Rev. Lett. 99, 062502 (2007).

 

Spectroscopy of 36Mg: interplay of normal and intruder configurations at the neutron-rich boundary of the "island of inversion"

A. Gade et al., Phys. Rev. Lett. 99, 072502 (2007).

 

Shape coexistence in neutron-deficient krypton isotopes

E. Clément, A. Görgen, W. Korten et al., Phys. Rev. C 75, 054313 (2007).

 

2006:

Maya, a gaseous active target

C.E. Demonchy et al.,  Nucl. Inst. and Meth. in Phys. Res. A 573, 145 (2006). 

 

Gamma spectroscopy of 25,27Ne and 26,27Na

A. Obertelli et al., Phys. Rev. C 74, 064305 (2006).

 

Two-neutron knockout from neutron-deficient 34Ar, 30S, and 26Si

K. Yoneda, A. Obertelli et al., Phys. Rev. C 74, 021303 (2006).

 

Population of bound excited states in intermediate-energy fragmentation reactions

A. Obertelli et al., Phys. Rev. C 73, 044606 (2006).

 

Experimental evidence for subbshell closure in 8He and indication of a resonant state in 7He below 1 MeV

F. Skaza, V. Lapoux, N. Keeley et al., Phys. Rev. C 73, 044301 (2006)

 

Shell gap reduction in neutron-rich N=17 nuclei
A. Obertelli et al., Phys. Lett. B 633, 33 (2006).

A cryogenic target for direct reaction studies with exotic beams

P. Dolegieviez et al., Nucl. Inst. and Meth. in Phys. Res. A 564, 32 (2006). 

 

2005:

N=16 subshell closure from stability to the neutron drip line

A. Obertelli, S. Péru, J. -P. Delaroche, A. Gillibert, M. Girod, and H. Goutte
Phys. Rev. C 71, 024304 (2005).

 

2003:

Structure of light exotic nuclei 6,8He and 10,11 C from (p,p') reactions

V. Lapoux et al., Nucl. Phys. A 722, 49c (2003).

 

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