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NSR database version of April 11, 2024.

Search: Author = M.C.Mhamed

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2021CA11      Phys.Rev. C 103, 034308 (2021)

M.A.Cardona, D.Hojman, B.Roussiere, I.Deloncle, N.Barre-Boscher, M.C.Mhamed, E.Cottereau, B.I.Dimitrov, G.Tz.Gavrilov, A.Gottardo, C.Lau, S.Roccia, S.Tusseau-Nenez, D.Verney, M.S.Yavahchova

¹⁴⁵Ba β^- decay: Excited states and half-lives in neutron-rich ¹⁴⁵La

RADIOACTIVITY ¹⁴⁵Ba(β^-)[from ²³⁸U(γ, F), E=bremsstrahlung beam from 50 MeV electrons]; measured Eγ, Iγ, βγ- and γγ-coin, level half-lives by βγ(t) and γγ(t) using fast timing technique with HPGe and LaBr₃(Ce) detectors at the ALTO-PARRNe facility of IPN-Orsay. ¹⁴⁵La; deduced levels, J, π, β feedings, logft, B(M1)/B(E2), configurations. Systematics of d_5/2 to g_7/2 transitions in ^{133,135,137,139,141,143,145}La. Comparison with particle rotor model (PRM) calculations. ¹⁴⁵Cs, ^144,145La, ¹⁴⁵Ce, ¹⁴⁵Pr, ¹⁴⁴Ba, ¹²⁶In; observed γ rays in βγ-coin spectra from β^- decays of these nuclides.

NUCLEAR REACTIONS ²³⁸U(γ, F)¹⁴²Cs/¹⁴²Ba/¹⁴⁴Cs/¹⁴⁵Cs/¹⁴⁵Ba/¹⁴⁶Cs/¹⁴⁶Ba, E=bremsstrahlung beam from 50 MeV electrons]; measured yields.

doi: 10.1103/PhysRevC.103.034308
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2015ET01      Phys.Rev. C 91, 064317 (2015)

A.Etile, D.Verney, N.N.Arsenyev, J.Bettane, I.N.Borzov, M.C.Mhamed, P.V.Cuong, C.Delafosse, F.Didierjean, C.Gaulard, Nguyen Van Giai, A.Goasduff, F.Ibrahim, K.Kolos, C.Lau, M.Niikura, S.Roccia, A.P.Severyukhin, D.Testov, S.Tusseau-Nenez, V.V.Voronov

Low-lying intruder and tensor-driven structures in ⁸²As revealed by β decay at a new movable-tape-based experimental setup

RADIOACTIVITY ⁸²Ge(β^-)[from ²³⁸U(e, F), E=50 MeV followed by online mass separation using PARRNe mass separator at ALTO ISOL facility of IPN-Orsay]; measured Eγ, Iγ, βγ-, γγ-coin, half-life of ⁸²Ge isotope using BEDO detector assembly. ⁸²As; deduced levels, J, three potential 1+ states, π, β feedings, logft. Comparison with experimental and theoretical values of two 1+ states in ⁸²As and ⁸⁰Ga. Comparison with empirical core-particle coupling model and fully microscopic treatment within Skyrme-QRPA (quasiparticle random-phase approximation) approach. Discussed Gamow-Teller fragmentation due to tensor correlations and couplings to 2p-2h excitations. ⁸²Ga(β^-); measured half-life from growth-decay curve for 1348-keV γ ray, and compared with earlier experimental value. ^81,82,82mAs, ^81,81mGe, ⁸²Ga, ^130,132Sb, ¹³²Sn(β^-), ⁸²Ga(β^-n); observed γ rays from fission fragments present in the sample.

NUCLEAR STRUCTURE ⁸¹Ga, ⁸³As, ⁸⁵Br, ⁸⁷Rb; calculated proton QP energies, occupation probabilities. ⁸⁰Ga, ⁸²As, ⁸⁴Br, ⁸⁶Rb; calculated unperturbed energies of neutron-proton 2-qp states. ⁸¹Ge, ^82,83As, ⁸⁵Kr, ^86,87Rb; calculated levels, J, π. ⁸⁰Ga, ⁸²As; calculated energies and structures of the QRPA dipole (1+) neutron-proton 2-qp states. Comparison with experimental data. Empirical core-particle coupling model and fully microscopic treatment within Skyrme-QRPA approach.

doi: 10.1103/PhysRevC.91.064317
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2013KO32      Phys.Rev. C 88, 047301 (2013)

K.Kolos, D.Verney, F.Ibrahim, F.Le Blanc, S.Franchoo, K.Sieja, F.Nowacki, C.Bonnin, M.C.Mhamed, P.V.Cuong, F.Didierjean, G.Duchene, S.Essabaa, G.Germogli, L.H.Khiem, C.Lau, I.Matea, M.Niikura, B.Roussiere, I.Stefan, D.Testov, J.-C.Thomas

Probing nuclear structures in the vicinity of ⁷⁸Ni with β- and βn-decay spectroscopy of ⁸⁴Ga

RADIOACTIVITY ⁸⁴Ga(β^-), (β^-n)[from ²³⁸U(γ, F), E<50 MeV bremsstrahlung]; measured Eγ, Iγ, βγ-, γγ-coin, half-life of ⁸⁴Ga isotope using PARRNe mass spectrometer and resonant laser ionization at ALTO-IPN Orsay facility. ^83,84Ge; deduced levels, J, π, beta feedings, logft, configuration. Comparison with shell-model calculations.

NUCLEAR STRUCTURE ^83,84Ge; calculated levels, J, π, B(M1), B(E2) using shell model; deduced γ-branching ratios. Comparison with experimental data.

doi: 10.1103/PhysRevC.88.047301
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2013VE03      Phys.Rev. C 87, 054307 (2013)

D.Verney, B.Tastet, K.Kolos, F.Le Blanc, F.Ibrahim, M.C.Mhamed, E .Cottereau, P.V.Cuong, F.Didierjean, G.Duchene, S.Essabaa, M.Ferraton, S.Franchoo, L.H.Khiem, C.Lau, J.-F.Le Du, I.Matea, B.Mouginot, M.Niikura, B.Roussiere, I.Stefan, D.Testov, J.-C.Thomas

Structure of ⁸⁰Ge revealed by the β decay of isomeric states in ⁸⁰Ga: Triaxiality in the vicinity of ⁷⁸Ni

RADIOACTIVITY ⁸⁰Ga(β^-)[⁸⁰Ge beam from U(e, F), E=50 MeV]; measured Eγ, Iγ, βγ-, γγ-coin, T_1/2 of low-spin and high-spin isomers using the PARRNe mass separator at ALTO ISOL-IPN facility. ⁸⁰Ge; deduced levels, J, π, branching ratios. Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.87.054307
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2009LE26      Phys.Rev. C 80, 044308 (2009)

M.Lebois, D.Verney, F.Ibrahim, S.Essabaa, F.Azaiez, M.C.Mhamed, E.Cottereau, P.V.Cuong, M.Ferraton, K.Flanagan, S.Franchoo, D.Guillemaud-Mueller, F.Hammache, C.Lau, F.Le Blanc, J.-F.Le Du, J.Libert, B.Mouginot, C.Petrache, B.Roussiere, L.Sagui, N.de Sereville, I.Stefan, B.Tastet

Experimental study of ⁸⁴Ga beta decay: Evidence for a rapid onset of collectivity in the vicinity of ⁷⁸Ni

RADIOACTIVITY ^84gGa, ^84mGa(β^-), (β^-n), ⁸⁴Ge(β^-)[from U(γ, X), E=0-50 MeV]; measured Eγ, Iγ, βγ-coin, half-lives. ⁸⁴Ga, ⁸⁴Ge, ⁸⁴As, ⁸³Ge; deduced levels, J, π, delayed-neutron emission probabilities, logft. ⁸³Ge, ⁸⁴As, ^{89,90,93,94,96}Rb(β^-); measured Eγ. PARRNe-ALTO facility. Implications for structure near doubly-magic ⁷⁸Ni nucleus. Z=32-40 (even), N=52; N=42-54, Z=32; systematics of first 2+ and 4+ states.

NUCLEAR STRUCTURE ^{74,76,78,80,82,84}Ge; calculated potential energy surfaces (PES) and B(E2) using HFB+GCM approach.

doi: 10.1103/PhysRevC.80.044308
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2009VE11      Int.J.Mod.Phys. E18, 1976 (2009)

D.Verney, M.Lebois, F.Ibahim, S.Essabaa, F.Azaiez, M.C.Mhamed, E.Cottereau, P.V.Cuong, M.Ferraton, K.Flanagan, S.Franchoo, D.Guillemaud-Mueller, F.Hammache, C.Lau, F.Le Blanc, J.-F.Le Du, B.Mouginot, C.Petrache, B.Roussiere, L.Sagui, N.De Sereville, I.Stefan, B.Tastet

Structure of the neutron rich Ga and Ge isotopes observed at alto

RADIOACTIVITY ⁸⁴Ga, ⁸⁴Ge(β^-); ⁸⁴As, ⁸³Ge; measured Eγ, Iγ; deduced level energies, J, π, β-n transitions.

doi: 10.1142/S0218301309014111
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2007IB01      Nucl.Phys. A787, 110c (2007)

F.Ibrahim, D.Verney, M.Lebois, B.Roussiere, S.Essabaa, S.Franchoo, S.Gales, D.Guillemaud-Mueller, C.Lau, F.Le Blanc, J.F.Le Du, M.C.Mhamed, A.C.Mueller, J.Sauvage, and the ALTO Collaboration

The ALTO facility at IPN Orsay and study of neutron rich nuclei in the vicinity of ⁷⁸Ni

NUCLEAR REACTIONS ²³⁸U(γ, F)⁷⁸Zn/¹³²Sn, E not given; measured fission fragment yields. ALTO facility. ²³⁸U(n, F)⁸¹Zn/⁸³Ga, E not given; measured Eγ, Iγ, Eβ, Iβ, γγ-coin. ⁸¹Ga, ⁸³Ge deduced levels, J, π. Online mass separator.

doi: 10.1016/j.nuclphysa.2006.12.021
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