Valérie LAPOUX

Département de Physique Nucléaire

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Work position

Nuclear physicist - researcher at CEA-Saclay in the Laboratory of Atomic Nucleus studies LENA of the Nuclear Physics Department DPhN.


Fields : experimental nuclear physics, structure and direct reactions of the exotic atomic nucleus. Interpretation of nuclear data observables using microscopic models, in collaboration with theorists.

2007-today: main experiments at GANIL using MUST2 and at RIKEN/RIBF.

Since 2006, member of the MUST2 collaboration.
MUST2: multi-detector array for light charged particle spectroscopy, developed by Irfu, IPNO and GANIL,

2014-today: participation at RIBF to the MINOS program (spectroscopy of exotic nuclei using knock-out reactions on proton target).

Since 2013, member of the MINOS collaboration.
MINOS: MagIc Numbers Off Stability, a device for in-beam nuclear structure experiments with low-intensity exotic beams, developed by IRFU.

Research Topics

+ Experimental physics to study the structure and spectroscopy of exotic nuclei, evolution of nuclear properties (i.e. extended neutron-skin or halo structure, new shell closure) far from the valley of stability.
Realization of experimental programs of direct reactions induced by radioactive beams, using the charged particle spectroscopy technique and the devoted instrumentation (MUST2 array of Silicon-strip telescopes).

+ Analysis and calculations of nuclear direct reactions (elastic and inelastic scattering, one and two-nucleon transfer) induced by radioactive beams on proton target. Interpretation of observables (excitation energy spectra, cross sections) using microscopic models to extract structure and matter density distributions

+ Works in collaboration with theorists (structure and reactions), in the ESNT framework [Espace de Structure et de réactions Nucléaires Théorique, ] virtual space for Theory in Nuclear Structure and reactions:

+ Discussion of nuclear observables, comparison between exp-theory (2014):
+ Nuclear pair correlations probed via proton-induced transfer and knock-out reactions (2013)
+Structure and reaction in coupled reaction channels (2009),  workshop co-organized with N.Keeley.

+ Working group "e-RIB at GANIL2" on the prospectives for electron-radioactive ion beam collisions (in the framework of the future plans of GANIL). 
[Research Report] Electron scattering on radioactive ions at GANIL,
A. Chancé, P. Delahaye, F. Flavigny, V. Lapoux, A. Matta, V. Somà, CEA Saclay DRF, IRFU; GANIL; LPC Caen. 2020.  (HAL-Id: cea-03176547, v1) 


Sept. 2005:  “HDR” accreditation to supervise research (French post-doctoral degree allowing its holder to supervise PhD students), University of Paris XI-Orsay.
Sept. 1998: Ph.D Thesis in Nuclear Physics, University of Paris XI-Orsay.

Main responsibilities in scientific programs
Since 2013: co-pilot (co-chair) of the steering committee of the ESNT virtual laboratory for “Nuclear Structure and  reactions Theory” at CEA-Saclay,
Since 2012:  member of the steering committee of the MUST2 collaboration.

2008-2010: co-spokesperson of the RIBF–NP0802-RIBF57 experiment [spectroscopy of the drip-line nucleus 24O by (p,p’)], done in May 2010 during the MUST2 campaign.
2005-2008: spokesperson of the E525S experiment (spectroscopy of the exotic nucleus 6He via 8He(p,t)6He using MUST2 array).
2005-2006: prospective for the structure studies of the SPIRAL2 beams using direct reactions and particle spectroscopy;  letter of  intent LOI-16: “Unbound states of neutron-rich isotopes via direct reactions”
2001-2004:  responsible for the E405S experiment, 8He(p,p’), using the SPIRAL beam 8He.
1999-2000: spokesperson of the E323 experiment for proton elastic and inelastic scattering of 10,11C beams performed using MUST detector at GANIL in October 2000.

Supervisor of PhD Thesis (supervisor of 2 PhD Thesis in MUST2, responsible of 2 in the MUST1 collaboration).

2010-2013 - supervisor of S. Boissinot's PhD on the spectroscopy of 24O and analysis of RIBF57.
2005-2008 - supervisor of X. Mougeot's PhD on the spectroscopy of 6He and analysis of E525S.
2001-2004 - responsible of F. Skaza's PhD on the spectroscopy of 7,8He and analysis of E405S.
1999-2002 - spokesperson and responsible of E323 experiment, analyzed by C. Jouanne in the framework of his PhD.

Other activities

Since Oct. 2015 (n°93) responsible of the editorial and scientific committee of the journal review (in French) of the IRFU institute Scintillations .In 2020-2021, guest editor of the topical issue of The European Physical Journal A published in Nov. 2021:
 "Nuclear Reaction Studies: a Tribute to Jacques Raynal",

 [Nicolas Alamanos, Eric Bauge and Valérie Lapoux (Guest Editors)]


Full list see NSR (Nuclear Science References) database or Scopus Search.
[ query form / Author = V.Lapoux ] 

Main publications on the structure and reactions of light exotic nuclei:

Elastic scattering of light radioactive nuclei as studied with ECIS,
V.Lapoux, Eur.Phys.J. A 57, 172 (2021). doi: 10.1140/epja/s10050-021-00477-w

Radii and binding energies in oxygen isotopes: a challenge for nuclear forces,
V. Lapoux, V. Somà, C. Barbieri, H. Hergert, J.D. Holt and S. R. Stroberg, Phys. Rev. Lett. 117, 052501 (2016). doi: 10.1103/PhysRevLett.117.052501

Weakly bound Borromean structures of the exotic 6,8He nuclei through direct reactions on proton,
V. Lapoux and N. Alamanos, Eur. Phys. J. A 51, 91 (2015). doi: 10.1140/epja/i2015-15091-2

New excited states in the halo nucleus 6He,
X. Mougeot, V. Lapoux, et al., Physics Letters B 718, 441-446 (2012). doi: 10.1016/j.physletb.2012.10.054

Virtual coupling potential for elastic scattering of 10,11Be on proton and carbon targets,
V. Lapoux et al., Phys. Lett. B 658, 198 (2008). doi: 10.1016/j.physletb.2007.11.005

Strong pickup-coupling effect on p+10Be and 11Be elastic scattering around 40A MeV incident energy,
N. Keeley and V. Lapoux, Phys.Rev. C 77, 014605 (2008). doi: 10.1103/PhysRevC.77.014605

Structure of low-lying states of 10,11C from proton elastic and inelastic scattering,
C. Jouanne, V. Lapoux, et al., Phys. Rev. C 72, 014308 (2005). doi: 10.1103/PhysRevC.72.014308

Other publications:

Pairing Forces Govern Population of Doubly Magic 54Ca from Direct Reactions,
F. Browne, et al., Phys. Rev. Lett. 126, 252501 (2021). doi: 10.1103/PhysRevLett.126.252501

Evaluation of the 35K(p,gamma)36Ca reaction rate using the  37Ca(p,d) 36Ca transfer reaction,
L. Lalanne et al. Phys. Rev. C 103, 055809 (2021). doi:10.1103/PhysRevC.103.055809 

How Robust is the N=34 Subshell Closure? First Spectroscopy of 52Ar,
H.N. Liu et al., Phys.Rev.Lett. 122, 072502 (2019). doi: 10.1103/PhysRevLett.122.072502

78Ni revealed as a doubly magic stronghold against nuclear deformation,
R.Taniuchi et al., Nature (London) 569, 53 (2019). doi: 10.1038/s41586-019-1155-x

Shape Evolution in Neutron-Rich Krypton Isotopes Beyond N = 60: First Spectroscopy of 98,100Kr,
F. Flavigny et al.,  Phys.Rev.Lett. 118,  242501 (2017). doi: 10.1103/PhysRevLett.118.242501

Low-lying structure and shape evolution in neutron-rich Se isotopes,
S. Chen et al.,  Phys.Rev. C 95, 041302 (2017). doi: 10.1103/PhysRevC.95.041302

Are There Signatures of Harmonic Oscillator Shells Far from Stability? First Spectroscopy of 110Zr,
N. Paul et al., Phys. Rev. Lett. 118, 032501 (2017). doi: 10.1103/PhysRevLett.118.032501

Second 0+ state of unbound 12O: Scaling of mirror asymmetry,
D. Suzuki et al., Phys. Rev. C 93, 024316 (2016). doi: 10.1103/PhysRevC.93.024316

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). doi: 10.1103/PhysRevLett.115.192501

New findings on structure and production of 10He from 11Li with (d,3He) reaction,
A. Matta et al., Phys Rev C 92, 041302(R) (2015). doi: 10.1103/PhysRevC.92.041302

Limited Asymmetry Dependence of Correlations from Single Nucleon Transfer,
F. Flavigny et al., Phys.Rev.Lett. 110, 122503 (2013). doi: 10.1103/PhysRevLett.110.122503


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