Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM)

Membres de l'équipe

Sébastien Grégoire — 2013-06-04T15:03:49Z

Publications

Alain Astier — 2013-05-16T08:25:00Z

High-spin structures of ¹³⁶Cs
Phys. Rev. C 87 (2013) 064316
A. Astier, M.-G. Porquet, G. Duchêne, F. Azaiez, D. Curien, I. Deloncle, O. Dorvaux, B. J. P. Gall, M. Houry, R. Lucas, N. Redon, M. Rousseau, P. C. Srivastava, O. Stézowski, and Ch. Theisen,

Medium- and high-spin band structure of the chiral candidate ¹³²La
Phys. Rev. C 87 (2013) 044323
I. Kuti, J. Timár, D. Sohler, E.S. Paul, K. Starosta, A. Astier, D. Bazzacco, P. Bednarczyk, A.J. Boston, N. Buforn, H. J. Chantler, C. J. Chiara, R.M. Clark, M. Cromaz, M. Descovich, Zs. Dombrádi, P. Fallon, D.B. Fossan, C. Fox, A. Gizon, J. Gizon, A.A. Hecht, N. Kintz, T. Koike, I.Y. Lee, S. Lunardi, A.O. Macchiavelli, P.J. Nolan, B.M. Nyakó, C.M. Petrache, J.A. Sampson, H.C. Scraggs, T.G. Tornyi, R. Wadsworth, A. Walker, and L. Zolnai

Spectroscopy of ²⁶F to Probe Proton-Neutron Forces Close to the Drip Line
Phys. Rev. Lett. 110 (2013) 082502
A. Lepailleur, O. Sorlin, L. Caceres, B. Bastin, C. Borcea, R. Borcea, B. A. Brown, L. Gaudefroy, S. Grévy, G. F. Grinyer, G. Hagen, M. Hjorth-Jensen, G. R. Jansen, O. Llidoo, F. Negoita, F. de Oliveira, M.-G. Porquet, F. Rotaru, M.-G. Saint-Laurent, D. Sohler, M. Stanoiu, and J. C. Thomas

First proton-pair breaking in semi-magic nuclei beyond ¹³²Sn and ²⁰⁸Pb : Configuration of the long-lived isomer of ²¹⁷Pa
Phys. Rev. C 87 (2013) 014309
Alain Astier and Marie-Geneviève Porquet

High-spin structure and intruder excitations in ³⁶Cl
Phys. Rev. C 86 (2012) 024320
S. Aydin, F. Recchia, M. Ionescu-Bujor, A. Gadea, S. M. Lenzi, S. Lunardi, C. A. Ur, D. Bazzacco, P. G. Bizzeti, A. M. Bizzeti-Sona, M. Bouhelal, G. de Angelis, I. Deloncle, E. Farnea, A. Gottardo, F. Haas, T. Huyuk, H. Laftchiev, D. Mengoni, R. Menegazzo, C. Michelagnoli, D. R. Napoli, E. Sahin, P. P. Singh, D. Tonev, and J. J. Valiente-Dobón

High-spin structures of five N=82 isotones : ¹³⁶Xe, ¹³⁷Cs, ¹³⁸Ba, ¹³⁹La, and ¹⁴⁰Ce
Phys. Rev. C 85 (2012) 064316
A. Astier, M.-G. Porquet, Ts. Venkova, D. Verney, Ch. Theisen, G. Duchêne, F. Azaiez, G. Barreau, D. Curien, I. Deloncle, O. Dorvaux, B. J. P. Gall, M. Houry, R. Lucas, N. Redon, M. Rousseau, and O. Stézowski

Shell model plus cluster description of negative parity states in ²¹²Po
Phys. Rev. C 85 (2012) 064306
D.S. Delion, R.J. Liotta, P. Schuck, A. Astier, and M.-G. Porquet

High-spin states with seniority ν=4,5, and 6 in ^119-126Sn
Phys. Rev. C 85 (2012) 054316
A. Astier, M.-G. Porquet, Ch. Theisen, D. Verney, I. Deloncle, M. Houry, R. Lucas, F. Azaiez, G. Barreau, D. Curien, O. Dorvaux, G. Duchêne, B. J. P. Gall, N. Redon, M. Rousseau, and O. Stézowski

Spectroscopy of ²⁸F
Phys. Rev. C 85 (2012) 017303
M. Stanoiu, D. Sohler, O. Sorlin, Zs. Dombrádi, F. Azaiez, B. A. Brown, C. Borcea, C. Bourgeois, Z. Elekes, Zs. Fülöp, S. Grévy, D. Guillemaud-Mueller, F. Ibrahim, A. Kerek, A. Krasznahorkay, M. Lewitowicz, S. M. Lukyanov, J. Mrázek, F. Negoita, Yu.-E. Penionzhkevich, Zs. Podolyák, M.-G. Porquet, P. Roussel-Chomaz, M. G. Saint-Laurent, H. Savajols, G. Sletten, J. Timár, and C. Timis

Evolution of the N=50 gap from Z=30 to Z=38 and extrapolation toward ⁷⁸Ni
Phys. Rev. C 85 (2012) 014307
M.-G. Porquet and O. Sorlin

AGATA—Advanced GAmma Tracking Array
Nucl. Instr. Meth. in Phys. Res. A 668 (2012) 26
S. Akkoyun et al. (collaboration AGATA)

Medium-spin states in neutron-rich ⁸³As and ⁸¹As
Phys. Rev. C 84 (2011) 054305
M.-G. Porquet, A. Astier, D. Verney, Ts. Venkova, I. Deloncle, F. Azaiez, A. Buta, D. Curien, O. Dorvaux, G. Duchêne, B.J.P. Gall, F. Khalfallah, I. Piqueras, M. Rousseau, M. Meyer, N. Redon, O. Stézowski, R. Lucas, A. Bogachev.

Half-life measurements of ^{137, 139}Cs excited nuclear states
Eur. Phys. J. A 47 (2011) 106
B. Roussière, M.A. Cardona, I. Deloncle, D. Hojman, J. Kiener, P. Petkov, D. Tonev, Ts. Venkova and the ALTO Collaboration.

Un noyau de polonium dévoile sa structure alpha
Images de la Physique 2010 (paru en juillet 2011)
Alain Astier et Marie-Geneviève Porquet

High-spin states in the five-valence-particle nucleus ²¹³Po
Phys. Rev. C 83 (2011) 034302
Alain Astier and Marie-Geneviève Porquet

Measurements of nuclear γ-ray line emission in interactions of protons and α particles with N, O, Ne, and Si
Phys. Rev. C 83 (2011) 024603
H. Benhabiles-Mezhoud, J. Kiener, J.-P. Thibaud, V. Tatischeff, I. Deloncle, A. Coc, J. Duprat, C. Hamadache, A. Lefebvre-Schuhl, J.-C. Dalouzy, F. de Grancey, F. de Oliveira, F. Dayras, N. de Séréville, M.-G. Pellegriti, L. Lamia, and S. Ouichaoui.

First observation of high-spin states in ²¹⁴Po : Probing the valence space beyond ²⁰⁸Pb
Phys. Rev. C 83 (2011) 014311
Alain Astier and Marie-Geneviève Porquet

Spectroscopic information about a hypothetical tetrahedral configuration in ¹⁵⁶Gd
Phys. Rev. C 82 (2010) 067306
Q. T. Doan, A. Vancraeyenest, O. Stézowski, D. Guinet, D. Curien, J. Dudek, Ph. Lautesse, G. Lehaut, N. Redon, Ch. Schmitt, G. Duchêne, B. Gall, H. Molique, J. Piot, P. T. Greenlees, U. Jakobsson, R. Julin, S. Juutinen, P. Jones, S. Ketelhut, M. Nyman, P. Peura, P. Rahkila, A. Góźdź, K. Mazurek, N. Schunck, K. Zuber, P. Bednarczyk, A. Maj, A. Astier, I. Deloncle, D. Verney, G. de Angelis, and J. Gerl.

Coexistence of "α+²⁰⁸Pb" cluster structures and single-particle excitations in ²¹²Po
Eur. Phys. J. A 46 (2010) 165
A. Astier, P. Petkov, M.-G. Porquet, D.S. Delion, P. Schuck.

Two-Particle Separation Energy Trends in the Superdeformed Well
Phys. Rev. Lett. 104 (2010) 162501
A. N. Wilson, A. Korichi, S. Siem, A. Astier, D. Bazzacco, P. Bednarczyk, M. H. Bergström, S. Chmel, D. M. Cullen, P. M. Davidson, A. Görgen, F. Hannachi, H. Hübel, N. Kintz, T. Lauritsen, A. Lopez-Martens, S. Lunardi, S. Naguleswaran, B. M. Nyakó, M. Rejmund, G. Schönwasser, C. Schück, J. F. Sharpey-Schafer, J. Timar, R. Wadsworth, and J. Libert.

Near-yrast structure of N=93 neutron-rich lanthanide nuclei
Phys. Rev. C 81 (2010) 024313
G. S. Simpson, W. Urban, J. A. Pinston, J. C. Angelique, I. Deloncle, H. R. Faust, J. Genevey, U. Köster, T. Materna, R. Orlandi, A. Scherillo, A. G. Smith, J. F. Smith, T. Rząca-Urban, I. Ahmad, and J. P. Greene.

Novel Manifestation of α-Clustering Structures : New "α+ ²⁰⁸Pb" States in ²¹²Po Revealed by Their Enhanced E1 Decays
Phys. Rev. Lett. 104 (2010) 042701
A. Astier, P. Petkov, M.-G. Porquet, D.S. Delion, P. Schuck.

The use of EXOGAM for in-beam spectroscopy of proton drip-line nuclei with radioactive ion beams
Nucl. Instr. Meth. in Phys. Res. A 607 (2009) 412
M. Petri, E.S. Paul, P.J. Nolan, A.J. Boston, H.C. Boston, R.J. Cooper, M.R. Dimmock, S. Gros, B.M. McGuirk, G. Turk, D. Guinet, Ph. Lautesse, M. Meyer, N. Redon, B. Rossé, Ch. Schmitt, O. Stézowski, S. Bhattacharyya, G. De France, G. Mukherjee, F. Rejmund, H. Savajols, J.N. Scheurer, J. Gál, J. Molnár, B.M. Nyakó, J. Timár, L. Zolnai, K. Juhász, A. Astier, I. Deloncle, M.G. Porquet, A. Prévost, V.F.E. Pucknell, R. Wadsworth, P. Joshi, G. La Rana, R. Moro, M. Trotta, E. Vardaci, G. Hackman, G.C. Ball.

High spin excitations of the odd-odd ⁸⁸Rb₅₁ and ⁸⁶Br₅₁ nuclei : πp_3/2νd_5/2 and πf_5/2νd_5/2 residual interactions
Eur. Phys. J. A 40 (2009) 131
M.-G. Porquet, A. Astier, Ts. Venkova, I. Deloncle, F. Azaiez, A. Buta, D. Curien, O. Dorvaux, G. Duchêne, B.J.P. Gall, F. Khalfallah, I. Piqueras, M. Rousseau, M. Meyer, N. Redon, O. Stézowski, R. Lucas, A. Bogachev.

High spin excitations of ^81,82,83,85Se : Competing single-particle and collective structures around N=50
Eur. Phys. J. A 39 (2009) 295
M.-G. Porquet, A. Astier, Ts. Venkova, A. Prévost, I. Deloncle, F. Azaiez, A. Buta, D. Curien, O. Dorvaux, G. Duchêne, B.J.P. Gall, F. Khalfallah, I. Piqueras, M. Rousseau, M. Meyer, N. Redon, O. Stézowski, R. Lucas, A. Bogachev.

Nuclear magic numbers : new features far from stability
Prog. in Part. and Nucl. Phys. 61 (2008) 602 ; arXiv 0805.2561
O. Sorlin and M.-G. Porquet.

New high-spin states of ¹⁴²Ce and ¹⁴⁰Ba from fusion-fission reactions : Proton excitations in the N=84 isotones
Eur. Phys. J. A 34 (2007) 349
Ts. Venkova, M.-G. Porquet, A. Astier, I. Deloncle, P. Petkov, A. Prévost, F. Azaiez, A. Bogachev, A. Buta, D. Curien, O. Dorvaux, G. Duchêne, J. Durell, B.J.P. Gall, M. Houry, F. Khalfallah, R. Lucas, M. Meyer, I. Piqueras, N. Redon, A. Roach, M. Rousseau, O. Stézowski, Ch. Theisen.

Fission fragment properties obtained in the γ-γ-γ coincidence method in the reaction ²⁰⁸Pb(¹⁸O,f)
Eur. Phys. J. A 34 (2007) 23
A. Bogachev, L. Krupa, O. Dorvaux, E. Kozulin, M. Itkis, M.-G. Porquet, A. Astier, D. Curien, I. Deloncle, G. Duchêne, B.J.P. Gall, F. Hanappe, F. Khalfallah, M. Rousseau, L. Stuttge, N. Redon, O. Stézowski.

High spin states of ⁸⁴Br₄₉ and ⁸⁵Br₅₀ : Mapping the proton sub-shells towards ⁷⁸Ni
Eur. Phys. J. A 30 (2006) 541
A. Astier, M.-G. Porquet, Ts. Venkova, I. Deloncle, A. Prévost, F. Azaiez, A. Buta, D. Curien, O. Dorvaux, G. Duchêne, B.J.P. Gall, F. Khalfallah, I. Piqueras, M. Rousseau, M. Meyer, N. Redon, O. Stézowski, R. Lucas, A. Bogachev.

Beyond the N=50 shell closure : High-spin excitations of ⁸⁷Kr and ground-state spin of ⁸⁷Br
Eur. Phys. J. A 28 (2006) 153
M.-G. Porquet, Ts. Venkova, A. Astier, I. Deloncle, A. Prévost, F. Azaiez, A. Buta, D. Curien, O. Dorvaux, G. Duchêne, B.J.P. Gall, F. Khalfallah, I. Piqueras, M. Rousseau, M. Meyer, N. Redon, O. Stézowski, R. Lucas, A. Bogachev.

A new high-spin level scheme for ¹⁴⁹Nd from a fusion-fission reaction
Eur. Phys. J. A 28 (2006) 147
Ts. Venkova, M.-G. Porquet, M. Houry, R. Lucas, Ch. Theisen, A. Roach.

New high-spin states of ¹⁴⁷Nd and ¹⁴⁵Ce : Octupole correlation in the N=87 isotones
Eur. Phys. J. A 26 (2005) 315
Ts. Venkova, M.-G. Porquet, A. Astier, I. Deloncle, P. Petkov, A. Prévost, F. Azaiez, A. Bogachev, A. Buta, D. Curien, O. Dorvaux, G. Duchêne, J. Durell, B.J.P. Gall, M. Houry, F. Khalfallah, R. Lucas, M. Meyer, I. Piqueras, N. Redon, A. Roach, M. Rousseau, O. Stézowski, Ch. Theisen.

Crossing of the πd_5/2 and πg_7/2 orbitals in the ₅₁Sb isotopes
Eur. Phys. J. A 25 (2005) 319
M.-G. Porquet, S. Péru, and M. Girod.

High-spin states of ^92-96Zr nuclei
Phys. Rev. C 72 (2005) 024304
D. Pantelica, I. Gh. Stefan, N. Nica, M.-G. Porquet, G. Duchêne, A. Astier, S. Courtin, I. Deloncle, F. Hoellinger, A. Bauchet, N. Buforn, L. Donadille, O. Dorvaux, J. Duprat, B.J.P. Gall, C. Gautherin, T. Kutsarova, S. Lalkovski, R. Lucas, M. Meyer, A. Minkova, A. Prévost, N. Redon, N. Schulz, H. Sergolle, O. Stézowski, Ts. Venkova, A. Wilson.

High-spin structure of ^{121,123,125,127}Sb nuclei : Single proton and core-coupled states
Eur. Phys. J. A 24 (2005) 39
M.-G. Porquet, Ts. Venkova, R. Lucas, A. Astier, A. Bauchet, I. Deloncle, A. Prévost, F. Azaiez, G. Barreau, A. Bogachev, N. Buforn, A. Buta, D. Curien, T.P. Doan, L. Donadille, O. Dorvaux, G. Duchêne, J. Durell, Th. Ethvignot, B.J.P. Gall, D. Grimwood, M. Houry, F. Khalfallah, W. Korten, S. Lalkovski, Y. Le Coz, M. Meyer, A. Minkova, I. Piqueras, N. Redon, A. Roach, M. Rousseau, N. Schulz, A.G. Smith, O. Stézowski, Ch. Theisen, B.J. Varley.

Medium-spin excitations of the neutron-rich ⁸⁴Se isotope : Possible decrease in energy of the N=50 neutron-core excitation
Eur. Phys. J. A 22 (2004) 391
A. Prévost, M.-G. Porquet, A. Astier, I. Deloncle, F. Azaiez, A. Buta, D. Curien, O. Dorvaux, G. Duchêne, B.J.P. Gall, F. Khalfallah, I. Piqueras, M. Rousseau, M. Meyer, N. Redon, O. Stézowski, Ts. Venkova, R. Lucas, A. Bogachev.

High-spin structure of neutron-rich nuclei produced by heavy-ion induced fission
Int. J. Mod. Phys. E 13 (2004) 29
M.-G. Porquet.

Structure of polonium isotopes at high-spin with RFD + Euroball IV
Int. J. Mod. Phys. E 13 (2004) 47
B. Rossé, O. Stézowski, M. Meyer, A. Prévost, N. Redon, J. Styczen, M. Brekiesz, J. Grebosz, A. Maj, W. Meczynski, T. Pawlat, M. Zieblinski, K. Züber, P. Bednarczyk, D. Curien, O. Dorvaux, B. Gall, P. Papka, J. Robin, J.-P. Vivien, A. Astier, I. Deloncle, M.-G. Porquet, K. Keyes, A. Papenberg, K.M. Spohr, H. Hübel, A. Bracco, F. Camera, J. Bastin, M. Gorska.

Superdeformed nuclear matter in nuclei with Z>82 : Magnetic properties and neutron shell gap
Eur. Phys. J. A 20 (2004) 31
N. Redon, N. Buforn, R. Duffait, P. Lautesse, M. Meyer, A. Prévost, O. Stézowski, A. Astier, A. Bauchet, I. Deloncle, M.-G. Porquet, J. Domscheit, A. Goergen, H. Hübel, E. Mergel, S. Neumann, D. Rossbach, N. Nenoff, G. Schoenwasser, A.N. Wilson, R. Lucas, F.A. Beck, P. Bednarczyk, D. Curien, G. Duchêne, O. Dorvaux, B.J.P. Gall, N. Kintz, J.-P. Vivien, D.M. Cullen.

Evolution of the πg_9/2νh²_11/2 multiplet in the neutron-rich ₄₉In isotopes : Evidence for the gradual filling of the neutron sub-shell
Eur. Phys. J. A 20 (2004) 245
M.-G. Porquet, A. Astier, I. Deloncle, O. Dorvaux, B.J.P. Gall, R. Lucas, M. Meyer, A. Prévost, N. Redon, N. Schulz, O. Stézowski.

New determination of gamma-ray line intensities of the E_p=550 and 1747 keV resonances of the ¹³C(p,gamma)¹⁴N reaction
Nucl. Instr. Meth. in Phys. Res. A 519 (2004) 623
J. Kiener, M. Gros, V. Tatischeff, D. Attié, I. Bailly, A. Bauchet, C. Chapuis, B. Cordier, I. Deloncle, M.-G. Porquet, S. Scanne, N. de Séréville, G. Tauzin

Evolution of the πg_9/2νh_11/2 configuration in the neutron-rich ^110,112Rh and ^114,116Ag isotopes
Eur. Phys. J. A 18 (2003) 25
M.-G. Porquet, Ts. Venkova, A. Astier, A. Bauchet, I. Deloncle, N. Buforn, L. Donadille, O. Dorvaux, B.J.P. Gall, S. Lalkovski, R. Lucas, M. Meyer, A. Minkova, A. Pérvost, N. Redon, N. Schulz, O. Stézowski

Two-quasiparticle and collective excitations in transitional ^108,110Pd nuclei
Eur. Phys. J. A 18 (2003) 589
S. Lalkovski, A. Minkova, M.-G. Porquet, A. Bauchet, I. Deloncle, A. Astier, N. Buforn, L. Donadille, O. Dorvaux, B.J.P. Gall, R. Lucas, M. Meyer, A. Prévost, N. Redon, N. Schulz, O. Stézowski.

High-spin study of the neutron-rich odd-odd ^106,108Rh and ^110,112Ag isotopes
Eur. Phys. J. A 15 (2002) 463
M.-G. Porquet, Ts. Venkova, P. Petkov, A. Bauchet, I. Deloncle, A. Astier, N. Buforn, J. Duprat, B.J.P. Gall, C. Gautherin, E. Gueorguieva, F. Hoellinger, T. Kutsarova, R. Lucas, M. Meyer, A. Minkova, N. Redon, N. Schulz, H. Sergolle, A. Wilson.

High-spin structure of the neutron-rich ^109,111,113Rh isotopes
Eur. Phys. J. A 15 (2002) 429
Ts. Venkova, M.-G. Porquet, A. Astier, A. Bauchet, I. Deloncle, S. Lalkovski, N. Buforn, L. Donadille, O. Dorvaux, B.P.J. Gall, R. Lucas, M. Meyer, A. Minkova, A. Prévost, N. Redon, N. Schulz, O. Stézowski.

High-spin study of odd-A ₄₉In isotopes beyond the neutron mid-shell
Eur. Phys. J. A 15 (2002) 315
R. Lucas, M.-G. Porquet, Ts.Venkova, I. Deloncle, M. Houry, Ch. Theisen, A. Astier, A. Bauchet, S. Lalkovski, G. Barreau, N. Buforn, T.P. Doan, L. Donadille, O. Dorvaux, J. Durell, Th. Ethvignot, B.P.J. Gall, D. Grimwood, W. Korten, Y. Le Coz, M. Meyer, A. Minkova, A. Prévost, N. Redon, A. Roach, N. Schulz, A.G. Smith, O. Stézowski and B.J. Varley.

Coulomb excitation of ⁷²Zn₄₂
Eur. Phys. J. A 14 (2002) 1
S. Leenhardt, O. Sorlin, M.-G. Porquet, F. Azaïez, J.C. Angelique, M. Belléguic, C. Borcéa, C. Bourgeois, J.M. Daugas, C. Donzaud, I. Deloncle, J. Duprat, A. Gillibert, S. Grévy, D. Guillemaud-Mueller, J. Kiener, M. Lewitowicz, S.M. Lukyanov, F. Marie, N.A. Orr, Yu.-E. Penionzhkevich, F. de Oliveira Santos, F. Pougheon, M.-G. Saint-Laurent, W. Shuying, Yu. Sobolev, J.S. Winfield.

Multiparticle excitations in ¹⁹⁴Pb
Nucl. Phys. A697 (2002) 3
M. Kaci, M.-G. Porquet, I. Deloncle, M. Aïche, F. Azaïez, G. Bastin, C.W. Beausang, C. Bourgeois, R.M. Clark, R. Duffait, J. Duprat, B.J.P. Gall, F. Hannachi, K. Hauschild, M.J. Joyce, A. Korichi, Y. Le Coz, M. Meyer, E.S. Paul, N. Perrin, N. Poffé, N. Redon, C. Schück, H. Sergolle, J.F. Sharpey-Schafer, J. Simpson, A. G. Smith, R. Wadsworth.

First identification of rotational bands in ¹⁰³Tc : Evolution of intrinsic proton states of the ^97-105₄₃Tc isotopes
Eur. Phys. J. A 10 (2000) 145
A. Bauchet, I. Deloncle, M.-G. Porquet, A. Astier, N. Buforn, M. Meyer, S. Perriès, N. Redon, B.J.P. Gall, F. Hoellinger, N. Schulz, G. Duchêne, S. Courtin, Ts. Venkova, P. A. Butler, N. Amzal, R.D. Herzberg, A. Chewter, R. Cunningham, M. Houry, R. Lucas, W. Urban, A. Nowak, E. Piasecki, J. Duprat, C. Petrache, T. Kroll.

High-spin structure of the neutron-rich ^104,106,108₄₄Ru isotopes : γ-vibrational bands and two-quasiparticle excitations
Eur. Phys. J. A 8 (2000) 177
I. Deloncle, A. Bauchet, M.-G. Porquet, M. Girod, S. Péru, J.-P. Delaroche, A. Wilson, B.J.P. Gall, F. Hoellinger, N. Schulz, E. Gueorguieva, A. Minkova, T. Kutsarova, Ts. Venkova, C. Gautherin, R. Lucas, J. Duprat, H. Sergolle, A. Astier, N. Buforn, M. Meyer, S. Perriès, N. Redon.

Evidence for deformation in ^113-116Cd isotopes
Eur. Phys. J. A 7 (2000) 347
N. Buforn, A. Astier, J. Meyer, M. Meyer, S. Perriès, N. Redon, O. Stézowski, M.-G. Porquet, I. Deloncle, A. Bauchet, J. Duprat, B.J.P. Gall, C. Gautherin, E. Gueorguieva, F. Hoellinger, T. Kutsarova, R. Lucas, A. Minkova, N. Schulz, H. Sergolle, Ts. Venkova, A.N. Wilson.

High-spin states of ⁸⁸Sr : breaking of the neutron core
Nucl. Phys. A669 (2000) 14
E.A. Stefanova, T. Kutsarova, I. Deloncle, M.-G. Porquet, M. Grinberg, E. Gueorguieva, Ts. Venkova, A. Minkova, F. Azaiez, S. Bouneau, C. Bourgeois, J. Duprat, B.J.P. Gall, C. Gautherin, F. Hoellinger, R. Lucas, N. Schulz, H. Sergolle, A. Wilson and Ch. Stoyanov

Lifetimes of ²⁶Al and ³⁴Cl in an astrophysical plasma
Phys. Rev. C61 (1999) 015801
A. Coc, M.-G. Porquet, F. Nowacki

High-spin structure of the neutron-rich ^107,109Rh isotopes : the role of triaxiality
Eur. Phys. J. A 6 (1999) 405
Ts. Venkova, M.-G. Porquet, I. Deloncle, B.J.P. Gall, H. De Witte, P. Petkov, A. Bauchet, T. Kutsarova, E. Gueorguieva, J. Duprat, C. Gautherin, F. Hoellinger, R. Lucas, A. Minkova, N. Schulz, H. Sergolle, E.A. Stefanova , A. Wilson.

Structures of neutron-rich palladium isotopes produced in heavy-ion induced fission
Eur. Phys. J. A 6 (1999) 43
M. Houry, R. Lucas, M.-G. Porquet, C. Theisen, M. Girod, M. Aïche, M.-M. Aléonard, G. Barreau, F. Becker, J.-F. Chemin, I. Deloncle, T.P. Doan, J.L. Durell, K. Hauschild, W. Korten, Y. Le Coz, M.J. Leddy, S. Perriès, N. Redon, A.A. Roach, J.-N. Scheurer, B.J. Varley.

High-spin structures observed in the ¹⁰¹Tc fission fragment
Eur. Phys. J. A 4 (1999) 319
F. Hoellinger, N. Schulz, S. Courtin, B.J.P. Gall, M.-G. Porquet, I. Deloncle, A. Wilson, T. Kutsarova, A. Minkova, J. Duprat, H. Sergolle, C. Gautherin, and R. Lucas.

Neutron h11/2 band structure of ^{109, 111}Pd observed in heavy-ion induced fission
Phys. Rev. C58 (1998) 1966
T. Kutsarova, A. Minkova, M.-G. Porquet, I. Deloncle, E. Gueorguieva, F. Azaiez, S. Bouneau, C. Bourgeois, J. Duprat, B.J.P. Gall, C. Gautherin, F. Hoellinger, R. Lucas, N. Schulz, H. Sergolle, Ts. Venkova, A. Wilson.

Exotic nuclei produced by heavy-ion induced fission
Heavy Ion Physics 7 (1998) 67
M.-G. Porquet, I. Deloncle, A. Minkova, A. Wilson, B.J.P. Gall, F. Hoellinger, N. Schulz, T. Kutsarova,T. Venkova, H. Sergolle, J. Duprat, F. Azaiez, S. Bouneau, C. Bourgeois, C. Gautherin, R. Lucas.

A study of fusion-fission at Z = 107
J. Phys. G Nucl. Part. Phys. 23 (1997) 1293
F.D. Smit, P.A. Butler, D.M. Cullen, B. Gall, G. Duchêne, F. Hoellinger, P.M. Jones, T. Kutsarova, A. Minkova, S. Naguleswaran, R.T. Newman, J.V. Pilcher, M.-G. Porquet, N. Rowley, N. Schulz, J.F. Sharpey-Schafer, T. Stevens and A. Wilson.

Fission induced by heavy ions : new results from EUROGAM array
Acta Physica Polonica B27 (1996) 179
M.-G. Porquet, F. Azaiez, J.F. Sharpey-Schafer, A. Astier, G. Bastin, C.W. Beausang, C. Bourgeois, R.M. Clark, I. Deloncle, J. Duprat, B.J.P. Gall, F. Hannachi, M.J. Joyce, M. Kaci, A. Korichi, Y. Le Coz, M. Meyer, N. Perrin, N. Poffé, N. Redon, C. Schück, H. Sergolle, J. Simpson, A.G. Smith, R. Wadsworth.

New approach in the off-line treatment of high-fold data
Nucl. Instr. and Meth. A 357 (1995) 150
I. Deloncle, M.-G. Porquet, M. Dziri-Marcé.

1er mai en RUSSIE : La fête du travail se solde par un succès franco-russe retentissant !

2013-05-13T09:35:21Z

Le nouveau séparateur d'ions de recul SHELS (Separator for Heavy Element Spectroscopy) a transmis son premier faisceau de particules alpha à Dubna en Russie. Ce résultat représente l'aboutissement de 7 années de travail menées au travers de la collaboration GABRIELA par des physiciens de 2 laboratoires de l'IN2P3, le CSNSM et l'IPHC, et d'un laboratoire du JINR à Dubna, le FLNR.

Stages et Thèses

2013-04-24T14:48:08Z

Voici les sujets de thèses proposés actuellement dans le groupe SNO :

	Étude de noyaux riches en neutrons autour du gap sphérique N=50
	Structure des Noyaux Lourds et R&D associée
	Caractérisation de la structure « α-²⁰⁸Pb » dans le noyau ²¹²Po
	Formes exotiques et symétries dans les noyaux : triaxialité, super et hyper-déformation, chiralité et wobbling
	Étude de noyaux exotiques figés avec POLAREX

Documentation additionnelle

Alain Astier — 2013-04-24T09:36:09Z

- Structure du noyau

Publications SNO

Alain Astier — 2013-04-24T09:34:45Z

- Structure du noyau

Membres du groupe

Alain Astier — 2013-04-24T09:31:26Z

- Structure du noyau

Accueil SNO

Alain Astier — 2013-04-24T09:26:42Z

- Structure du noyau

Andres Santander (CSNSM - UPSud)

Olivier Plantevin — 2013-04-16T13:40:32Z

The physics of strongly-interacting fermions is the common thread in several challenging open problems at all scales. For instance, such physics is involved in the description of compact nuclear and sub-nuclear matter, in the study of the primitive Universe and the symmetry breakings leading to today's observable cosmos, in ultra-cold atomic gases in optical lattices, or in electrons in a large class of solids in which low-dimensional or correlated behavior is present. These last systems are the subject of this work.

In this talk, I will present my research on the electronic structure of some correlated-electron materials. I have used angle-resolved photoemission spectroscopy (ARPES), an experimental technique that allows measuring the band structure of a solid and how the many-body interactions and phase transitions affect it. I will focus on two systems :

(i) The two-dimensional electron gases (2DEGs) at the surface of transition-metal oxides. These materials present remarkable properties, such as superconductivity or colossal magneto-resistance. We recently discovered how to create 2DEGs at the surface of some insulating oxides [1, 2]. As 2DEGs are at the basis of modern electronics and of exotic states of matter, such as the quantum Hall effect or the topological insulators, our discovery opens a wealth of perspectives in the fields of correlated electrons and oxide electronics [3].

(ii) The puzzling ‘hidden-order' phase transition at THO = 17.5 K in URu2Si2. This transition, discovered in the 80's, is characterized by a large entropy loss and an energy gap of about 10 meV in the density of states at the Fermi level. However, the identification of the associated broken symmetry and order parameter are still a riddle, earning it the epithet of “the Higgs problem of condensed-matter physics”. We demonstrated that there is a heavy-electron Fermi-surface instability occurring at the transition [4], thus highlighting the importance of heavy fermions in the physics behind the hidden order. More recently, we studied how the lattice of heavy-fermions evolves from the paramagnetic state above THO to the hidden-order state [5], and how the symmetry of the electronic structure changes, and opens an energy gap, across the transition [6].

[1] A. F. Santander-Syro et al., Nature 469, 189-193 (2011). [2] A. F. Santander-Syro et al., Phys. Rev. B 86, 121107(R) (2012). [3] C. Bareille et al., submitted (2013). [4] A. F. Santander-Syro et al., Nature Physics 5, 637-641 (2009). [5] F. L. Boariu et al, Phys. Rev. Lett. 110, 156404 (2013). [6] C. Bareille et al., submitted (2013).

Ariel Haziot (LPS, ENS)

Olivier Plantevin — 2013-04-16T08:25:57Z

Nous avons découvert que les cristaux d'hélium 4 présentent une plasticité géante dans le limite des très basses températures si l'on élimine toutes leurs impuretés. Les cristaux d'hélium de pureté absolue ne résistent pratiquement pas au cisaillement dans une direction particulière, même sous contrainte extrêmement faible (1 nanobar) et au voisinage du zéro absolu (0,01 Kelvin). Ce phénomène est un exemple spectaculaire de "plasticité" car nous avons montré qu'il est une conséquence du glissement de dislocations coins le long des plans de base de la structure hexagonale compacte. C'est un effet "géant" car l'amplitude de ce glissement est très grande et sans dissipation ce qui réduit l'un des coefficients élastiques d'environ 80% même sous l'effet de contraintes extrêmement faibles (1 nanobar). On notera cependant que, contrairement à la plasticité classique, il s'agit d'un effet réversible. Il disparaît dès que des traces d'impuretés s'attachent aux dislocations ou si la température augmente au-delà de 0,2 Kelvin ce qui induit des collisions entre les dislocations en mouvement et les phonons thermiques. Ce dernier phénomène nous a permis de mesurer la densité de dislocations (de 10^4 à 10^6 par cm^2) et leur longueur libre. Cette longueur est très grande (50 à 200 microns) et prouve que les dislocations sont peu connectées, vraisemblablement groupées en sous-joints de faible désorientation. Des expériences encore plus récentes ont mis en évidence l'existence d'une vitesse limite de déplacement des dislocations en-dessous de laquelle les impuretés suivent le mouvement des dislocations. Nous tenterons de comparer ce comportement à celui de cristaux classiques.