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NSR database version of May 30, 2024.

Search: Author = P.van Isacker

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2023GA24      Phys.Rev. C 108, L031305 (2023)

N.Gavrielov, J.E.Garcia-Ramos, P.Van Isacker, A.Leviatan

Persistent vibrational structure in 110-116Cd

doi: 10.1103/PhysRevC.108.L031305
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2023LE18      Phys.Rev. C 108, 064313 (2023)

M.Ley, L.Knafla, J.Jolie, A.Esmaylzadeh, A.Harter, A.Blazhev, C.Fransen, A.Pfeil, J.-M.Regis, P.Van Isacker

Lifetime measurements in 92Mo: Investigation of seniority conservation in the N=50 isotones

doi: 10.1103/PhysRevC.108.064313
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2022KA40      Phys.Rev. C 106, 044321 (2022)

V.Karayonchev, A.Blazhev, J.Jolie, A.Dewald, A.Esmaylzadeh, C.Fransen, G.Hafner, L.Knafla, C.Muller-Gatermann, G.Rainovski, J.-M.Regis, K.Schomacker, P.Van Isacker

New aspects of the low-energy structure of 211At

NUCLEAR REACTIONS 209Bi(16O, 14C)211At, E=84 MeV; measured recoiling beam-like nuclei, Eγ, Iγ, (particle)γ-coin. 211At; deduced levels, J, π, high-spin states, T1/2 of the excited states, B(E2). Recoil-distance Doppler shift and the Doppler-shift attenuation methods. Comparison to two shell-model calculations, one using the Kuo-Herling residual interaction and the other using a single-j approximation for protons in the 0h9/2 orbital. Comparison to other experimental data. Cologne plunger device with 11 HPGe detectors positioned in two rings at FN-Tandem accelerator (University of Cologne).

doi: 10.1103/PhysRevC.106.044321
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2022VA05      Phys. Rev. Res. 4, L022031 (2022)

P.Van Isacker, M.Rejmund

Shell-model study of octupole collectivity near 208Pb

NUCLEAR STRUCTURE 208Pb; calculated energy levels, J, π, B(E3); deduced the collectivity of the particle-hole wave function of low-lying octupole 3- states in doubly magic nuclei is mainly due to the neutron-proton interaction.

doi: 10.1103/PhysRevResearch.4.L022031
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2022VI03      Phys.Lett. B 830, 137123 (2022)

A.Vitez-Sveiczer, A.Algora, A.I.Morales, B.Rubio, G.G.Kiss, P.Sarriguren, P.Van Isacker, G.de Angelis, F.Recchia, S.Nishimura, J.Agramunt, V.Guadilla, A.Montaner-Piza, S.E.A.Orrigo, A.Horvath, D.Napoli, S.Lenzi, A.Boso, V.H.Phong, J.Wu, P.-A.Soderstrom, T.Sumikama, H.Suzuki, H.Takeda, D.S.Ahn, H.Baba, P.Doornebal, N.Fukuda, N.Inabe, T.Isobe, T.Kubo, S.Kubono, H.Sakurai, Y.Shimizu, C.Sidong, B.Blank, P.Ascher, M.Gerbaux, T.Goigoux, J.Giovinazzo, S.Grevy, T.Kurtukian Nieto, C.Magron, W.Gelletly, Zs.Dombradi, Y.Fujita, M.Tanaka, P.Aguilera, F.Molina, J.Eberth, F.Diel, D.Lubos, C.Borcea, E.Ganioglu, D.Nishimura, H.Oikawa, Y.Takei, S.Yagi, W.Korten, G.de France, P.Davies, J.Liu, J.Lee, T.Lokotko, I.Kojouharov, N.Kurz, H.Shaffner, A.Petrovici

The β-decay of 70Kr into 70Br: Restoration of the pseudo-SU(4) symmetry

RADIOACTIVITY 70Kr(EC), (β+p) [from 9Be(78Kr, X), E=345 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies, partial level scheme, T1/2, log ft, B(GT), β-delayed proton emission probability, an approximate realization of pseudo-SU(4) symmetry in the system. Comparison with the proton-neutron quasiparticle random-phase approximation (pnQRPA) calculations. The Radioactive Ion Beam Factory (RIBF) of the RIKEN Nishina Center using the BigRIPS fragment separator, the ZeroDegree Spectrometer, the WAS3ABI implantation station and the EURICA HPGe cluster array.

doi: 10.1016/j.physletb.2022.137123
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2021FU05      Phys.Rev. C 103, L021302 (2021)

G.J.Fu, C.W.Johnson, P.Van Isacker, Z.Ren

Nucleon-pair coupling scheme in Elliott's SU(3) model

NUCLEAR STRUCTURE 52Fe; calculated energies of the levels and B(E2) in the ground band up to 10+ using the shell-model with the GXPF1 interaction, and compared with experimental data. Representation of SU(3) symmetry in nucleon-pair approximation (NPA) truncation scheme of the shell-model configuration space.

doi: 10.1103/PhysRevC.103.L021302
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2021VA03      Phys.Lett. B 816, 136183 (2021)

J.J.Valiente-Dobon, A.Gottardo, G.Benzoni, A.Gadea, S.Lunardi, A.Algora, G.de Angelis, D.Bazzacco, J.Benlliure, P.Boutachkov, A.Bracco, A.M.Bruce, F.Camera, E.Casarejos, M.L.Cortes, F.C.L.Crespi, A.Corsi, C.Domingo-Pardo, M.Doncel, T.Engert, H.Geissel, J.Gerl, A.Goasduff, N.Goel, M.Gorska, J.Grebosz, E.Gregor, T.Habermann, S.Klupp, I.Kojouharov, N.Kurz, S.M.Lenzi, S.Leoni, S.Mandal, R.Menegazzo, D.Mengoni, B.Million, A.I.Morales, D.R.Napoli, F.Naqvi, C.Nociforo, M.Pfutzner, S.Pietri, Zs.Podolyak, A.Prochazka, F.Recchia, P.H.Regan, D.Rudolph, E.Sahin, H.Schaffner, A.Sharma, B.Sitar, D.Siwal, P.Strmen, I.Szarka, C.A.Ur, P.M.Walker, H.Weick, O.Wieland, H.-J.Wollersheim, P.Van Isacker

Manifestation of the Berry phase in the atomic nucleus 213Pb

RADIOACTIVITY 213Pb(IT) [from 9Be(238U, X)213Pb, E=1 GeV/nucleon]; measured decay products, Eγ, Iγ; deduced γ-ray energies and intensities, T1/2, isomer decays with asymmetric E2 transition probabilities, Berry phase.

doi: 10.1016/j.physletb.2021.136183
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2021VA07      Eur.Phys.J. A 57, 178 (2021)

P.Van Isacker, A.O.Macchiavelli

Neutron-proton spin-spin correlations in the ground states of N = Z nuclei

NUCLEAR STRUCTURE 24Mg, 28Si, 32S, 36Ar; analyzed available data; deduced matrix elements of the spin-spin operator, expectation values in a single-l shell through a Surface Delta Interaction.

doi: 10.1140/epja/s10050-021-00489-6
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2020BO15      Nucl.Phys. A1003, 122028 (2020)

A.Bouldjedri, S.Zerguine, P.Van Isacker

Higher-rank discrete symmetries in the IBM. II Octahedral shapes: Dynamical symmetries

doi: 10.1016/j.nuclphysa.2020.122028
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2020GO06      Phys.Rev. C 102, 014323 (2020)

A.Gottardo, G.de Angelis, P.Doornenbal, L.Coraggio, A.Gargano, N.Itaco, K.Kaneko, P.Van Isacker, T.Furumoto, G.Benzoni, J.Lee, H.Liu, M.Matsushita, D.Mengoni, V.Modamio-Hoybjor, S.Momiyama, T.Motobayashi, D.R.Napoli, M.Niikura, E.Sahin, Y.Shiga, H.Sakurai, R.Taniuchi, S.Takeuchi, H.Wang, J.J.Valiente-Dobon, R.Avigo, H.Baba, N.Blasi, F.L.Bello Garrote, F.Browne, F.C.L.Crespi, S.Ceruti, R.Daido, M.-C.Delattre, D.Fang, Zs.Dombradi, T.Isobe, I.Kuti, G.Lorusso, K.Matsui, B.Melon, T.Miyazaki, S.Nishimura, R.Orlandi, Z.Patel, S.Rice, L.Sinclair, P.A.Soderstrom, D.Sohler, T.Sumikama, J.Taprogge, Zs.Vajta, H.Watanabe, O.Wieland, J.Wu, Z.Y.Xu, M.Yalcinkaya, R.Yokoyama

Transition strengths in the neutron-rich 73, 74, 75Ni isotopes

NUCLEAR REACTIONS Pb(73Ni, 73Ni'), (74Ni, 74Ni'), (75Ni, 75Ni'), E=215 MeV/nucleon, [secondary cocktail beam from 9Be(238U, F), E=345 MeV/nucleon, and separated by A/Q using the BigRIPS fragment separator at RIBF-RIKEN facility]; measured reaction products identified by the ZeroDegree spectrometer, Eγ, Iγ, (scattered Ni nuclei)γ-coin using the WAS3Abi-EURICA setup with the DALI2 NaI(Tl) array for γ detection. 73,74,75Ni; deduced levels, J, π, B(E2) from Coulomb excitation cross sections. Comparison with large-scale shell model calculations.

doi: 10.1103/PhysRevC.102.014323
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2020VA08      Eur.Phys.J. Special Topics 229, 2443 (2020)

P.Van Isacker

A solvable model for octupole phonons

NUCLEAR STRUCTURE 208Pb; calculated energy levels, J, π, B(Eλ). Comparison with available data.

doi: 10.1140/epjst/e2020-000026-x
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2020VA09      Nucl.Phys. A1004, 122037 (2020)

P.Van Isacker, A.Bouldjedri, S.Zerguine

Higher-rank discrete symmetries in the IBM. III Tetrahedral shapes

doi: 10.1016/j.nuclphysa.2020.122037
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2019KA13      Phys.Rev. C 99, 024326 (2019)

V.Karayonchev, A.Blazhev, A.Esmaylzadeh, J.Jolie, M.Dannhoff, F.Diel, F.Dunkel, C.Fransen, L.M.Gerhard, R.-B.Gerst, L.Knafla, L.Kornwebel, C.Muller-Gatermann, J.-M.Regis, N.Warr, K.O.Zell, M.Stoyanova, P.Van Isacker

Lifetimes in 211At and their implications for the nuclear structure above 208Pb

NUCLEAR REACTIONS 208Pb(6Li, 3n), E=34 MeV; measured Eγ, Iγ, γγ-coin, half-lives of 13/2-, 17/2- and 23/2- levels in 211At by γγ-coin fast timing technique using HPGe detectors and LaBr3(Ce) scintillators for γ-rays at the Institute for Nuclear Physics, University of Cologne. 211At; deduced levels, B(M1), B(E2). Comparison with shell model calculations, and previous experimental values.

NUCLEAR STRUCTURE 209Bi, 210Po, 211At; calculated B(E2), magnetic dipole moments, B(M1) using two shell-model calculations: semiempirical interaction for three particles in a single j=9/2 shell, and the modified Kuo-Herling interaction in a multi-j model space. Comparison with experimental values.

doi: 10.1103/PhysRevC.99.024326
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2019RA28      Phys.Lett. B 797, 134797 (2019)

D.Ralet, E.Clement, G.Georgiev, A.E.Stuchbery, M.Rejmund, P.Van Isacker, G.de France, A.Lemasson, J.Ljungvall, C.Michelagnoli, A.Navin, D.L.Balabanski, L.Atanasova, A.Blazhev, G.Bocchi, R.Carroll, J.Dudouet, E.Dupont, B.Fornal, S.Franchoo, C.Fransen, C.Muller-Gatermann, A.Goasduff, A.Gadea, P.R.John, D.Kocheva, T.Konstantinopoulos, A.Korichi, A.Kusoglu, S.M.Lenzi, S.Leoni, R.Lozeva, A.Maj, R.Perez, N.Pietralla, C.Shand, O.Stezowski, D.Wilmsen, D.Yordanov, D.Barrientos, P.Bednarczyk, B.Birkenbach, A.J.Boston, H.C.Boston, I.Burrows, B.Cederwall, M.Ciemala, J.Collado, F.Crespi, D.Cullen, H.J.Eberth, J.Goupil, L.Harkness, H.Hess, A.Jungclaus, W.Korten, M.Labiche, R.Menegazzo, D.Mengoni, B.Million, J.Nyberg, Zs.Podolyak, A.Pullia, B.Quintana Arnes, F.Recchia, P.Reiter, F.Saillant, M.D.Salsac, E.Sanchis, C.Theisen, J.J.Valiente Dobon, O.Wieland

Evidence of octupole-phonons at high spin in 207Pb

NUCLEAR REACTIONS 100Mo(208Pb, 207Pb), E=6.25 MeV/nucleon; measured reaction products, Eγ, Iγ. 207Pb; deduced γ-ray energies, T1/2, B(E3) for 19/2- state. Recoil Distance Doppler-Shift (RDDS) method.

doi: 10.1016/j.physletb.2019.134797
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2018DE05      J.Phys.(London) G45, 035102 (2018)

E.Derbali, P.Van Isacker, B.Tellili, C.Souga

Effective operators in a single-j orbital

NUCLEAR STRUCTURE 92Mo, 94Ru, 96Pd, 93Tc, 95Rh, 97Ag, 210,211,213,214,215,216Pb, 98Cd; calculated B(E2) values, J, π. Comparison with experimental data.

doi: 10.1088/1361-6471/aaa4c9
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2018KI03      Phys.Rev. C 97, 041302 (2018)

Y.H.Kim, M.Rejmund, P.Van Isacker, A.Lemasson

Generic features of the neutron-proton interaction

NUCLEAR STRUCTURE 96,128Cd, 124Pd, 212Po; calculated νν-, ππ-, and νπ two-body matrix elements (TBME), energies of yrast eigenstates for two neutrons and two protons for 128Cd, and for four neutrons and four protons for 124Pd, squares of the components of eigenstates using jj45pna, surface delta (SDI), and quadrupole interactions. Discussed low-energy yrast spectroscopy of nuclei dominated by fully aligned νπ pairs (FAPs), with the valence nucleons occupying high-J orbitals.

doi: 10.1103/PhysRevC.97.041302
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2018LE12      Phys.Rev. C 98, 031302 (2018)

A.Leviatan, N.Gavrielov, J.E.Garcia-Ramos, P.Van Isacker

Quadrupole phonons in the cadmium isotopes

NUCLEAR STRUCTURE 110Cd; calculated levels, J, π, B(E2) using U(5) partial dynamical symmetries U(5)-DS and U(5)-PDS-CM in the collective and interactive boson models. Comparison with experimental values.

doi: 10.1103/PhysRevC.98.031302
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2018MO33      Phys.Lett. B 781, 706 (2018)

A.I.Morales, G.Benzoni, H.Watanabe, G.de Angelis, S.Nishimura, L.Coraggio, A.Gargano, N.Itaco, T.Otsuka, Y.Tsunoda, P.Van Isacker, F.Browne, R.Daido, P.Doornenbal, Y.Fang, G.Lorusso, Z.Patel, S.Rice, L.Sinclair, P.-A.Soderstrom, T.Sumikama, J.J.Valiente-Dobon, J.Wu, Z.Y.Xu, A.Yagi, R.Yokoyama, H.Baba, R.Avigo, F.L.Bello Garrote, N.Blasi, A.Bracco, A.M.Bruce, F.Camera, S.Ceruti, F.C.L.Crespi, M.-C.Delattre, Zs.Dombradi, A.Gottardo, T.Isobe, I.Kojouharov, N.Kurz, I.Kuti, S.Lalkovski, K.Matsui, B.Melon, D.Mengoni, T.Miyazaki, V.Modamio-Hoybjor, S.Momiyama, D.R.Napoli, M.Niikura, R.Orlandi, Zs.Podolyak, P.H.Regan, H.Sakurai, E.Sahin, D.Sohler, H.Schaffner, R.Taniuchi, J.Taprogge, Zs.Vajta, O.Wieland, M.Yalcinkaya

Is seniority a partial dynamic symmetry in the first νg9/2 shell?

RADIOACTIVITY 72,74Co(β-) [from 9Be(238U, X), E=345 MeV/nucleon]; measured reaction products, Eγ, Iγ; deduced γ-ray energies, levels, isomeric states, seniority scheme, B(E2), the disappearance of the seniority isomerism. Comparison with available data. The MCSM calculations. The first in-flight β-delayed fast-timing study. The RIBF facility in RIKEN within the EURICA collaboration.

doi: 10.1016/j.physletb.2018.04.049
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2018NA20      Phys.Rev. C 98, 024319 (2018)

B.S.Nara Singh, D.M.Cullen, M.J.Taylor, P.C.Srivastava, P.Van Isacker, O.Beeke, B.Dodson, C.Scholey, D.O'Donnell, U.Jakobsson, T.Grahn, P.T.Greenlees, P.M.Jones, R.Julin, S.Khan, M.Leino, A.-P.Leppanen, S.Eeckhaudt, K.Mantyniemi, J.Pakarinen, P.Peura, P.Rahkila, J.Saren, J.Sorri, J.Uusitalo, M.Venhart

Level structure above the 17+ isomeric state in 15269Tm83

NUCLEAR REACTIONS 92Mo(64Zn, n3p), E=280 MeV; measured Eγ, Iγ, recoil time of flight and total kinetic energy loss (TKEL), γγ-coin, delayed γ, and half-life of the 17+ isomer using JUROGAM array for γ detection, RITU separator for recoil separation, and Gamma-Recoil-Electron-Alpha-Tagging (GREAT) spectrometer at JYFL, Jyvaskyla. 152Tm; deduced levels, J, π, configurations; calculated levels, J, π and B(E2) values of transitions in the yrast sequence 9+ to 21+ using both large scale shell model and reduced shell model with different proton-neutron interactions.

doi: 10.1103/PhysRevC.98.024319
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2018PE12      Phys.Rev. C 98, 034302 (2018)

E.E.Peters, P.Van Isacker, A.Chakraborty, B.P.Crider, A.Kumar, S.H.Liu, M.T.McEllistrem, C.V.Mehl, F.M.Prados-Estevez, T.J.Ross, J.L.Wood, S.W.Yates

Seniority structure of 136Xe82

NUCLEAR REACTIONS 136Xe(n, n'), E=2.5-4.1 MeV; measured Eγ, Iγ, γ(θ), level half-lives by DSAM, σ(E) using an HPGe detector surrounded by an annular BGO detector at the University of Kentucky Accelerator Laboratory. 136Xe; deduced levels, J, π, B(E2), B(M1), B(E1), branching ratios, multipole mixing ratios, configurations. Comparison with shell model calculations.

doi: 10.1103/PhysRevC.98.034302
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2018VA06      Phys.Lett. B 780, 414 (2018)

P.Van Isacker, A.O.Macchiavelli

Gamow-Teller transitions and neutron-proton-pair transfer reactions

NUCLEAR REACTIONS 42Ca(3He, t), 40Ca(3He, p), E not given; analyzed available data; deduced a schematic model of nucleons to explain Gamow-Teller and two-nucleon transfer data.

doi: 10.1016/j.physletb.2018.03.034
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2017KO34      Eur.Phys.J. A 53, 175 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, A.Astier, R.Altenkirch, S.Ansari, Th.Braunroth, M.L.Cortes, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, J.Litzinger, C.Muller-Gatermann, P.Petkov, M.Rudigier, M.Scheck, Ph.Scholz, P.Spagnoletti, M.Spieker, C.Stahl, R.Stegmann, M.Stoyanova, P.Thole, N.Warr, V.Werner, W.Witt, D.Wolk, K.O.Zell, P.Van Isacker, V.Yu.Ponomarev

A revised B(E2;2+1 → 0+1) value in the semi-magic nucleus 210Po

NUCLEAR REACTIONS 208Pb(12C, 10Be), E=62 MeV; measured Eγ, Iγ(θ), γγ-coin, (particle)γ-coin using 11 HPGe, light reaction fragments using solar cells array. 210Po; deduced 2+1 state T1/2 using the line shape of the transition, branching ratios to this state from upper states, B(E1), B(E2), B(E3), B(M1), T1/2 of three states and transitions; calculated low-lying states energy, structure, B(E1), B(E2), B(E3), B(M1) using QPM (Quasiparticle Phonon Model). Compared with data.

doi: 10.1140/epja/i2017-12367-5
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2017KO38      Phys.Rev. C 96, 044305 (2017)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, A.Blazhev, R.Altenkirch, S.Ansari, A.Astier, M.Bast, M.Beckers, Th.Braunroth, M.Cappellazzo, A.Dewald, F.Diel, M.Djongolov, C.Fransen, K.Gladnishki, A.Goldkuhle, A.Hennig, V.Karayonchev, J.M.Keatings, E.Kluge, Th.Kroll, J.Litzinger, K.Moschner, C.Muller-Gatermann, P.Petkov, M.Scheck, Ph.Scholz, T.Schmidt, P.Spagnoletti, C.Stahl, R.Stegmann, A.Stolz, A.Vogt, N.Warr, V.Werner, D.Wolk, J.C.Zamora, K.O.Zell, V.Yu.Ponomarev, P.Van Isacker

Low collectivity of the 2+1 state of 212Po

NUCLEAR REACTIONS 208Pb(12C, 8Be)212Po, E=64 MeV; measured Eγ, Iγ, (particle)γ-coin, half-life of the first 2+ state by recoil-distance Doppler-shift (RDDS) method at the FN Tandem facility of the University of Cologne. 212Po; deduced levels, J, π, B(E2). Comparisons with levels and B(E2) of 210Po and 210Pb, and with theoretical calculations using shell model. Systematics of B(E2) values for the first 2+ states in 20Ne, 44Ti, 52Ti, 136Te, 212Po, nuclei with two valence protons and two valence neutrons.

doi: 10.1103/PhysRevC.96.044305
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2017SP02      Phys.Rev. C 95, 021302 (2017)

P.Spagnoletti, G.S.Simpson, R.Carroll, J.-M.Regis, A.Blanc, M.Jentschel, U.Koster, P.Mutti, T.Soldner, G.de France, C.A.Ur, W.Urban, A.M.Bruce, F.Drouet, L.M.Fraile, L.P.Gaffney, D.G.Ghita, S.Ilieva, J.Jolie, W.Korten, T.Kroll, C.Larijani, S.Lalkovski, R.Lica, H.Mach, N.Marginean, V.Paziy, Zs.Podolyak, P.H.Regan, M.Scheck, N.Saed-Samii, G.Thiamova, C.Townsley, A.Vancraeyenest, V.Vedia, A.Gargano, P.Van Isacker

Half-life of the 15/2+ state of 135I A test of E2 seniority relations

NUCLEAR REACTIONS 235U(n, F)135I, E=cold neutrons at PF1B facility and high-flux reactor of the ILL-Grenoble; measured prompt Eγ, Iγ, half-life of (15/2+) state in 135I by γγ(t) using EXILL-FATIMA γ-detector array of Clover Ge and LaBr3 detectors. 135I; deduced levels, B(E2), configuration, E2 seniority relations between B(E2) values in neighboring nuclei.

NUCLEAR STRUCTURE 134Te, 135I; calculated levels, J, π, B(E2) by large-scale shell-model calculations; deduced large two-body component of the E2 operator, whereas small energy shifts due to the three-body component of the effective interaction.

doi: 10.1103/PhysRevC.95.021302
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2017VA30      Phys.Rev. C 96, 064305 (2017)

P.Van Isacker, J.Engel, K.Nomura

Neutron-proton pairing and double-β decay in the interacting boson model

NUCLEAR STRUCTURE 44,46,48Ca, 44Sc, 44,46,48,50Ti, 48,50Cr; calculated levels, J, π using IBM, p-IBM and shell-model with KB3G interaction. Isospin-invariant version of the nucleon-pair shell model applied to shell-model calculations, and interacting-boson-model (IBM) calculations with and without the isoscalar boson.

RADIOACTIVITY 42,44,46,48Ca, 46,48,50Ti, 50Cr(2β-); calculated 0νββ matrix elements for g.s. to g.s. and Gamow-Teller transitions using shell-model, IBM and p-IBM; deduced that isoscalar boson is not important for energy spectra but improves the results for the double-β matrix elements.

doi: 10.1103/PhysRevC.96.064305
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2016KO03      Phys.Rev. C 93, 011303 (2016)

D.Kocheva, G.Rainovski, J.Jolie, N.Pietralla, C.Stahl, P.Petkov, A.Blazhev, A.Hennig, A.Astier, Th.Braunroth, M.L.Cortes, A.Dewald, M.Djongolov, C.Fransen, K.Gladnishki, V.Karayonchev, J.Litzinger, C.Muller-Gatermann, M.Scheck, Ph.Scholz, R.Stegmann, P.Thole, V.Werner, W.Witt, D.Wolk, P.Van Isacker

Low-lying isovector 2+ valence-shell excitations of 212Po

NUCLEAR REACTIONS 208Pb(12C, 2α)212Po, E=62 MeV; measured Eγ, Iγ, (particle)γ-, γγ-coin, enriched target, level half-lives by DSAM and line-shape analysis using an array of 12 HPGe detectors for γ detection, and solar cell array for reaction products at FN Tandem facility of the University of Cologne. 212Po; deduced levels, J, π, B(M1), B(E2) of second and third 2+ states as candidates for one-phonon mixed-symmetry states (MSS). Comparison with simple single-j shell model calculation. 211Po; observed γ rays. 209,210Po, 208Pb, 209Bi; reaction products measured in coincidence with γ rays.

doi: 10.1103/PhysRevC.93.011303
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2016NO02      J.Phys.(London) G43, 024008 (2016)

K.Nomura, T.Otsuka, P.Van Isacker

Shape coexistence in the microscopically guided interacting boson model

NUCLEAR STRUCTURE 148,150,154Sm, 134Ba, 186Pb, 172,174,176,178,180,182,184,186,188,190Hg; calculated total energy surfaces, J, π. Interacting boson model (IBM).

doi: 10.1088/0954-3899/43/2/024008
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2016RE03      Phys.Lett. B 753, 86 (2016)

M.Rejmund, A.Navin, S.Biswas, A.Lemasson, M.Caamano, E.Clement, O.Delaune, F.Farget, G.de France, B.Jacquot, P.Van Isacker

Electromagnetic properties of neutron-rich nuclei adjacent to the Z = 50 shell closure

NUCLEAR REACTIONS Be(238U, X)124Sb/125Sb/126Sb/127Sb/128Sb/118In/119In/120In/121In/122In/123In/124In/125In/126In/127In/128In, E=1.29 GeV; measured reaction products, Eγ, Iγ; deduced energy levels, J, π, B(M1)/B(E2). Comparison with NATHAN and OXBASH calculations.

doi: 10.1016/j.physletb.2015.11.077
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2016VA07      Phys.Rev. C 94, 024324 (2016)

P.Van Isacker, A.O.Macchiavelli, P.Fallon, S.Zerguine

Properties of isoscalar-pair condensates

doi: 10.1103/PhysRevC.94.024324
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2015CE03      Phys.Rev. C 91, 044311 (2015)

I.Celikovic, A.Dijon, E.Clement, G.de France, P.Van Isacker, J.Ljungvall, A.Dewald, C.Fransen, G.Georgiev, A.Gorgen, A.Gottardo, M.Hackstein, T.W.Hagen, C.Louchart, P.Napiorkowski, A.Obertelli, F.Recchia, W.Rother, S.Siem, B.Sulignano, P.Ujic, J.J.Valiente-Dobon, M.Zielinska

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

NUCLEAR REACTIONS 70Zn(238U, X)69Zn/71Zn, E=6.76 MeV/nucleon; measured Eγ, Iγ, level-half-lives by recoil distance Doppler-shift method using VAMOS spectrometer, EXOGAM array, and a differential plunger device at GANIL. 69,71Zn; deduced levels, J, π, B(M1), B(E2). Comparison with shell-model calculations with the JUN45 interaction. Coexistence of single-particle and collective states.

doi: 10.1103/PhysRevC.91.044311
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2015VA06      Nucl.Phys. A938, 45 (2015)

P.Van Isacker, A.Bouldjedri, S.Zerguine

Higher-rank discrete symmetries in the IBM I. Octahedral shapes: General Hamiltonian

doi: 10.1016/j.nuclphysa.2015.03.003
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2015VA11      Phys.Rev. C 92, 011301 (2015)

P.Van Isacker, J.Jolie, T.Thomas, A.Leviatan

Partial dynamical symmetry in Bose-Fermi systems

NUCLEAR STRUCTURE 195Pt; calculated levels, J, π, B(E2) by generalization of partial dynamical symmetry (PDS) concept to a system of interacting bosons and fermions. Comparison with experimental data.

doi: 10.1103/PhysRevC.92.011301
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2014KR06      Phys.Rev. C 89, 041302 (2014); Erratum Phys.Rev. C 92, 039902 (2015)

C.Kremer, J.Beller, A.Leviatan, N.Pietralla, G.Rainovski, R.Trippel, P.Van Isacker

Linking partial and quasi dynamical symmetries in rotational nuclei

NUCLEAR STRUCTURE 156,158,160,162Gd, 160,162,164Dy, 164,166Er; calculated ground-state fluctuations for the extended consistent-Q formalism (ECQF) Hamiltonian in even-even rare earth nuclei; deduced empirical formalism for linkage between O(6) partial dynamical symmetry (PDS) and SU(3) quasi-dynamical symmetry (QDS) in rotational nuclei; identified nuclei satisfying both symmetries. 160Gd; calculated levels, J, π, bands with the IBM approach using the ECQF Hamiltonian, and compared with experimental spectrum. Quantum number fluctuations and the intrinsic state formalism are used within the framework of interacting boson model.

doi: 10.1103/PhysRevC.89.041302
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2014NA01      Phys.Lett. B 728, 136 (2014)

A.Navin, M.Rejmund, C.Schmitt, S.Bhattacharyya, G.Lhersonneau, P.Van Isacker, M.Caamano, E.Clement, O.Delaune, F.Farget, G.de France, B.Jacquot

Towards the high spin-isospin frontier using isotopically-identified fission fragments

NUCLEAR REACTIONS 9Be(238U, X)104Zr/105Zr/106Zr, E=6.2 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced energy levels, J, π; Comparison with projected shell model calculations, available data.

doi: 10.1016/j.physletb.2013.11.024
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2014VA10      Nucl.Data Sheets 120, 119 (2014)

P.Van Isacker

Correlations Between Charge Radii, E0 Transitions, and M1 Strength

NUCLEAR STRUCTURE Ce, Nd, Sm, Gd, Dy, Er, Yb, Hf, W; calculated isotope shifts, nuclear charge radii, electric monopole transition rates, and summed magnetic dipole transition. Interacting boson model.

doi: 10.1016/j.nds.2014.07.023
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2013CE01      Acta Phys.Pol. B44, 375 (2013)

I.Celikovic, A.Dijon, E.Clement, G.de France, P.Van Isacker, J.Ljungvall, C.Fransen, G.Georgiev, A.Gorgen, A.Gottardo, M.Hackstein, T.W.Hagen, C.Louchart, P.Napiorkowski, A.Obertelli, F.Recchia, W.Rother, S.Siem, B.Sulignano, P.Ujic, J.J.Valiente-Dobon, M.Zielinska

Lifetime Measurements of Zn Isotopes Around N = 40

NUCLEAR REACTIONS 70Zn(238U, X)70Zn/72Zn, E=6.76 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced B(E2). Recoil Distance Doppler Shift method.

doi: 10.5506/APhysPolB.44.375
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2013LE04      Phys.Rev. C 87, 021302 (2013)

A.Leviatan, J.E.Garcia-Ramos, P.Van Isacker

Partial dynamical symmetry as a selection criterion for many-body interactions

NUCLEAR STRUCTURE 156Gd; calculated levels, J, π, bands, B(E2), odd-even staggering. IBM Hamiltonians with SU(3) partial dynamical symmetry (PDS). Triaxial features. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.021302
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2013VA09      Phys.Rev. C 87, 061301 (2013)

P.Van Isacker, A.O.Macchiavelli

Geometry of the shears mechanism in nuclei

NUCLEAR STRUCTURE 199Pb; calculated B(M1) for shears band, shell-model 2p-2h matrix elements of the surface delta interaction (SDI).

doi: 10.1103/PhysRevC.87.061301
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2013VA11      J.Phys.:Conf.Ser. 445, 012013 (2013)

P.Van Isacker

Shell-model derivation of the shears mechanism

doi: 10.1088/1742-6596/445/1/012013
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2013VA17      Int.J.Mod.Phys. E22, 1330028 (2013)

P.Van Isacker

Neutron-proton pairs in nuclei

NUCLEAR STRUCTURE 52Fe, 44Ti, 42Sc, 54Co, 50Mn, 46V, 48Cr, 96Cd, 94Ag, 92Pd; calculated energy levels, J, π, reduced matrix elements of the E2 operator. Shell model calculations.

doi: 10.1142/S0218301313300282
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2012ME02      Ann.Phys.(New York) 327, 1182 (2012)

P.Mei, P.Van Isacker

Spatial particle correlations in light nuclei. II four-particle systems

doi: 10.1016/j.aop.2011.12.003
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2012VA06      Phys.Scr. T150, 014042 (2012)

P.Van Isacker

Aligned neutron-proton pairs in N ∼ Z

NUCLEAR STRUCTURE 96Cd, 94Ag, 92Pd; analyzed experimental data; calculated parameters of 21+ isomer in 94Ag. Shell model and b-IBM calculations.

doi: 10.1088/0031-8949/2012/T150/014042
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2012ZE02      Phys.Rev. C 85, 034331 (2012)

S.Zerguine, P.Van Isacker, A.Bouldjedri

Consistent description of nuclear charge radii and electric monopole transitions

NUCLEAR STRUCTURE 144,146,148,150,152Ce, 146,148,150,152,154,156Nd, 148,150,152,154,156,158,160Sm, 150,152,154,156,158,160,162Gd, 152,154,156,158,160,162,164Dy, 154,156,158,160,162,164,166,168,170Er, 156,158,160,162,164,166,168,170,172,174,176Yb, 160,162,164,166,168,170,172,174,176,178,180,182Hf, 164,166,168,170,172,174,176,178,180,182,184,186,188,190W; calculated positive-parity levels up to 10+, isotope and isomer shifts, E0 strengths, effect of G bosons on monopole strengths. Interacting boson model (IBM-1). Comparison with experimental data.

doi: 10.1103/PhysRevC.85.034331
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2011DI04      Acta Phys.Pol. B42, 829 (2011)

A.Dijon, J.Ljungvall, E.Clement, G.de France, P.Van Isacker, A.Gorgen, A.Obertelli, W.Korten, J.P.Delaroche, A.Dewald, A.Gadea, L.Gaudefroy, M.Girod, M.Hackstein, J.Libert, D.Mengoni, T.Pissula, F.Recchia, M.Rejmund, W.Rother, E.Sahin, C.Schmitt, A.Shrivastava, J.J.Valiente-Dobon, K.O.Zell, M.Zielinska

Lifetime Measurements in Neutron-rich Fe and Co Isotopes

NUCLEAR REACTIONS 64Ni(238U, X)62Fe/64Fe/63Co/65Co, E=6.5 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced lifetimes of yrast states, B(E2).

doi: 10.5506/APhysPolB.42.829
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2011DI08      Phys.Rev. C 83, 064321 (2011)

A.Dijon, E.Clement, G.de France, P.Van Isacker, J.Ljungvall, A.Gorgen, A.Obertelli, W.Korten, A.Dewald, A.Gadea, L.Gaudefroy, M.Hackstein, D.Mengoni, Th.Pissulla, F.Recchia, M.Rejmund, W.Rother, E.Sahin, C.Schmitt, A.Shrivastava, J.J.Valiente-Dobon, K.O.Zell, M.Zielinska

Lifetime measurements in 63Co and 65Co

NUCLEAR REACTIONS 64Ni(238U, X), E=6.5 MeV/nucleon; measured particle spectra, Eγ, Iγ, γγ-coin, half-lives by recoil distance Doppler shift and the differential decay curve methods with a plunger device EXOGAM array. 63,65Co; deduced levels, J, π, B(E2). Systematics of excitation energies and B(E2) values in the even-N Fe, Co, and Ni nuclides. Comparison with large-scale shell model calculations in the pf and pfg9/2 valence space.

doi: 10.1103/PhysRevC.83.064321
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2011OB02      Phys.Lett. B 701, 417 (2011)

A.Obertelli, T.Baugher, D.Bazin, S.Boissinot, J.-P.Delaroche, A.Dijon, F.Flavigny, A.Gade, M.Girod, T.Glasmacher, G.F.Grinyer, W.Korten, J.Ljungvall, S.McDaniel, A.Ratkiewicz, B.Sulignano, P.Van Isacker, D.Weisshaar

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

NUCLEAR REACTIONS 9Be(78Kr, X)68Se/67As, E=150 MeV/nucleon;9Be(68Se, 2n), E=68 MeV/nucleon; 9Be(67As, 2n), E not given; measured reaction products, Eγ, Iγ. 66Se, 65As; deduced energy levels, J, π, shape coexistence. Comparison with mean-field-based predictions within a collective Hamiltonian formalism using the Gogny D1S effective interaction and to state-of-the-art shell-model calculations restricted to the pf5/2 g9/2 valence space.

doi: 10.1016/j.physletb.2011.06.032
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2011VA05      Nucl.Phys. A850, 157 (2011)

P.Van Isacker

The scientific legacy of J.P. Elliott

doi: 10.1016/j.nuclphysa.2010.12.007
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2011VA06      Int.J.Mod.Phys. E20, 191 (2011)

P.van Isacker

Partial conservation of seniority in nuclei

NUCLEAR STRUCTURE 70,72,74,76Ni, 92Mo, 94Ru, 96Pd, 98Cd; calculated energies, J, π; deduced conservation of seniority.

doi: 10.1142/S021830131101751X
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2011WI09      Phys.Rev. C 84, 014329 (2011); Pub.Note JOUR PRVCA 84 029903 (2011)

K.Wimmer, U.Koster, P.Hoff, Th.Kroll, R.Krucken, R.Lutter, H.Mach, Th.Morgan, S.Sarkar, M.Saha-Sarkar, W.Schwerdtfeger, P.C.Srivastava, P.G.Thirolf, P.Van Isacker

Identification of the slow E3 transition 136Csm136Cs with conversion electrons

NUCLEAR REACTIONS U(p, X)136mCs, E=1.4 GeV; measured Eγ, Iγ, E(ce), I(ce), γ(ce)-coin, isomer half-life, conversion coefficients. 136Cs; deduced levels, J, π, multipolarity, level scheme of isomer decay, B(E3), B(M4). Comparison with shell-model calculations.

doi: 10.1103/PhysRevC.84.014329
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2011ZE02      Phys.Rev. C 83, 064314 (2011)

S.Zerguine, P.Van Isacker

Spin-aligned neutron-proton pairs in N=Z nuclei

NUCLEAR STRUCTURE 90Nb, 92Pd, 94Ag, 96Cd; calculated levels, J, π, E2 matrix elements. Shell model calculations for four, six and eight hole configurations by mapping to interacting boson model. Role of the aligned neutron-proton pair with angular momentum J=9 and isospin T=0.

doi: 10.1103/PhysRevC.83.064314
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2010BO12      J.Phys.(London) G37, 105102 (2010)

M.Boyukata, P.Van Isacker, I.Uluer

Description of nuclei in the A ∼ 100 mass region with the interacting boson model

NUCLEAR STRUCTURE 92,94,96,98,100,102,104,106Zr, 94,96,98,100,102,104,106,108,110,112,114Mo, 98,100,102,104,106,108,110,112,114,116,118Ru, 102,104,106,108,110,112,114,116,118,120,122Pd; calculated energy spectra, potential energy surfaces, B(E2) values. IBM-1 model, comparison with experiment.

doi: 10.1088/0954-3899/37/10/105102
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2010MO02      Phys.Rev. C 81, 024304 (2010)

I.O.Morales, P.Van Isacker, V.Velazquez, J.Barea, J.Mendoza-Temis, J.C.Lopez Vieyra, J.G.Hirsch, A.Frank

Image reconstruction techniques applied to nuclear mass models

ATOMIC MASSES N=8-160, Z=8-106; analyzed masses and S(2n) for about 7000 nuclides in N-Z plane using image reconstruction techniques. Comparison of measured and calculated masses using the liquid-drop model (LDM), the liquid-drop model with schematic shell correction (LDMM), the Duflo-Zuker model (DZ), and the Garvey-Kelson relations. Improved predictions of nuclear mass models.

doi: 10.1103/PhysRevC.81.024304
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2010VA04      Europhys.Lett. 90, 32001 (2010)

P.Van Isacker, I.Talmi

Effective three-body interactions in nuclei

NUCLEAR STRUCTURE 40,41,48Ca; calculated three-body interactions.

doi: 10.1209/0295-5075/90/32001
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2010VA05      Nucl.Phys. A836, 225 (2010)

P.Van Isacker, A.Bouldjedri, S.Zerguine

Phase transitions in the sdg interacting boson model

doi: 10.1016/j.nuclphysa.2010.01.247
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2009DI11      Eur.Phys.J. A 42, 269 (2009)

A.E.L.Dieperink, P.Van Isacker

Shell corrections to a liquid-drop description of nuclear masses and radii

NUCLEAR STRUCTURE Z=8-100; analyzed two-neutron and two-proton separation energies, radii, related features using extended liquid drop model with shell corrections. Comparison with quantities derived from 2003 mass evaluation.

doi: 10.1140/epja/i2009-10869-3
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2009HE04      Nucl.Phys. A819, 11 (2009)

V.Hellemans, P.Van Isacker, S.De Baerdemacker, K.Heyde

Criticality in the configuration-mixed interacting boson model:(2) Q^(x1)Q^(x1)-Q^(x2)Q^(x2) mixing

doi: 10.1016/j.nuclphysa.2009.01.002
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2009LA08      Phys.Rev. C 79, 044307 (2009)

S.Lalkovski, P.Van Isacker

IBM-1 calculations towards the neutron-rich nucleus 106Zr

NUCLEAR STRUCTURE 106Zr, 106,108Mo, 106,110Ru, 106,112Pd; calculated level energies, B(E2) values, electric quadrupole transition probabilities using interacting boson model. Comparison with experimental data.

doi: 10.1103/PhysRevC.79.044307
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2008BA17      Phys.Rev. C 77, 041304 (2008)

J.Barea, A.Frank, J.G.Hirsch, P.Van Isacker, S.Pittel, V.Velazquez

Garvey-Kelson relations and the new nuclear mass tables

NUCLEAR STRUCTURE Z=5-100, N=8-270; deduced Garvey-Kelson mass relations. Finite-range liquid-drop model (FRDM), Duflo-Zuker(DZ) model, and Hartree-Fock-Bogoliubov model. Comparison with evaluated masses.

doi: 10.1103/PhysRevC.77.041304
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2008HI20      Int.J.Mod.Phys. E17, Supplement 1, 398 (2008)

J.G.Hirsch, I.Morales, J.Mendoza-Temis, A.Frank, J.C.Lopez-Vieyra, J.Barea, S.Pittel, P.van Isacker, V.Velazquez

The art of predicting nuclear masses

doi: 10.1142/S0218301308012014
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2008ME01      Nucl.Phys. A799, 84 (2008)

J.Mendoza-Temis, A.Frank, J.G.Hirsch, J.C.Lopez Vieyra, I.Morales, J.Barea, P.Van Isacker, V.Velazquez

Nuclear masses and the number of valence nucleons

ATOMIC MASSES A=1-293; analyzed atomic mass data with new empirical mass formula.

doi: 10.1016/j.nuclphysa.2007.11.010
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2008ME13      Nucl.Phys. A812, 28 (2008)

J.Mendoza-Temis, I.Morales, J.Barea, A.Frank, J.G.Hirsch, J.C.Lopez Vieyra, P.Van Isacker, V.Velazquez

Testing the predictive power of nuclear mass models

ATOMIC MASSES Z=8-108; A=16-256; analyzed masses using extrapolation with three mass models.

doi: 10.1016/j.nuclphysa.2008.08.008
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2008MO14      Phys.Rev. C 78, 024303 (2008)

I.O.Morales, A.Frank, C.E.Vargas, P.Van Isacker

Shape coexistence and phase transitions in the platinum isotopes

NUCLEAR STRUCTURE 182,184,186,188Pt; calculated potential energy surfaces, phase diagrams. Matrix coherent-state method of the IBA model.

doi: 10.1103/PhysRevC.78.024303
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2008PA27      Phys.Rev. C 78, 024301 (2008)

N.S.Pattabiraman, D.G.Jenkins, M.A.Bentley, R.Wadsworth, C.J.Lister, M.P.Carpenter, R.V.F.Janssens, T.L.Khoo, T.Lauritsen, D.Seweryniak, S.Zhu, G.Lotay, P.J.Woods, Krishichayan, P.Van Isacker

Analog E1 transitions and isospin mixing

NUCLEAR REACTIONS 16O(16O, n), (16O, p), E=29 MeV; measured Eγ, Iγ, half-lives using Doppler Shift Attenuation method. 31S, 31P; deduced B(E1). 31Si, 31P, 31,35S, 35Cl, 35Ar; analyzed B(E1), isospin mixing.

doi: 10.1103/PhysRevC.78.024301
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2008SO12      Nucl.Phys. A808, 27 (2008)

B.Sorgunlu, P.Van Isacker

Triaxiality in the interacting boson model

NUCLEAR STRUCTURE 108,110,112Ru, 114,116Pd, 124,126,128Xe, 128,130,132Ba, 180,182,184,186Os, 186Pt; calculated band splitting, radii and B(E2) using interacting boson model. Comparison with data.

doi: 10.1016/j.nuclphysa.2008.05.007
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2008VA01      Phys.Rev.Lett. 100, 052501 (2008)

P.Van Isacker, S.Heinze

Partial Conservation of Seniority and Nuclear Isomerism

NUCLEAR STRUCTURE 94Ru, 96Pd; calculated level energies, J, π, B(E2). Evidence for partial conservation of seniority quantum number.

doi: 10.1103/PhysRevLett.100.052501
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2008VA02      Acta Phys.Pol. B39, 421 (2008)

P.Van Isacker

Global and Local Nuclear Mass Formulas


2008ZA10      Phys.Rev. C 78, 044327 (2008)

L.Zamick, P.Van Isacker

Partial dynamical symmetries in the j=9/2 shell: Progress and puzzles

doi: 10.1103/PhysRevC.78.044327
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2008ZE03      Phys.Rev.Lett. 101, 022502 (2008)

S.Zerguine, P.Van Isacker, A.Bouldjedri, S.Heinze

Correlating Radii and Electric Monopole Transitions of Atomic Nuclei

doi: 10.1103/PhysRevLett.101.022502
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2007BA83      Eur.Phys.J. Special Topics 150, 189 (2007)

J.Barea, A.Frank, J.G.Hirsch, P.Van Isacker, V.Velazquez

Masses of atomic nuclei far from stability

doi: 10.1140/epjst/e2007-00301-x
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2007DI15      Eur.Phys.J. A 32, 11 (2007)

A.E.L.Dieperink, P.Van Isacker

The symmetry energy in nuclei and in nuclear matter

doi: 10.1140/epja/i2007-10360-3
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2007HE21      Acta Phys.Pol. B38, 1599 (2007)

V.Hellemans, P.Van Isacker, S.De Baerdemacker, K.Heyde

Phase Transitions in the Configuration Mixed Interacting Boson Model: U(5)-O(6) Mixing


2007HE27      Nucl.Phys. A789, 164 (2007), Erratum Nucl.Phys. A801, 80 (2008)

V.Hellemans, P.Van Isacker, S.De Baerdemacker, K.Heyde

Criticality in the configuration-mixed interacting boson model:(1) U(5)-Q(X) Q(X) mixing

doi: 10.1016/j.nuclphysa.2007.12.003
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2007LE16      J.Phys.(London) G34, 1729 (2007)

G.Levai, J.Cseh, P.Van Isacker

Application of cluster supersymmetry to nuclei with mass numbers A = 20, 19 and 18

NUCLEAR STRUCTURE A=18, 19, 20; calculated one nucleon transfer intensities, spectroscopic factors and B(E2) using a cluster supersymmetry scheme based on core+α configuration.

doi: 10.1088/0954-3899/34/7/013
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2007ST26      Nucl.Phys. A789, 125 (2007)

I.Stefanescu, A.Gelberg, J.Jolie, P.Van Isacker, P.von Brentano, Y.X.Luo, S.J.Zhu, J.O.Rasmussen, J.H.Hamilton, A.V.Ramayya, X.L.Che

IBM-1 description of the fission products 108, 110, 112Ru

NUCLEAR STRUCTURE 108,110,112Ru; calculated level energies, J, π, branching ratios and B(E2)using the IBM-1.

doi: 10.1016/j.nuclphysa.2007.03.007
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2006DU06      Phys.Rev.Lett. 96, 072503 (2006)

J.Dukelsky, V.G.Gueorguiev, P.Van Isacker, S.Dimitrova, B.Errea, S.Lerma

Exact Solution of the Isovector Neutron-Proton Pairing Hamiltonian

NUCLEAR STRUCTURE 64Ge; calculated pair energies, single-particle levels occupation probabilities. Richardson-Gaudin model, exact solution of isovector neutron-proton pairing Hamiltonian.

doi: 10.1103/PhysRevLett.96.072503
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2006DU16      Int.J.Mod.Phys. E15, 1665 (2006)

J.Dukelsky, S.H.Lerma, B.Errea, S.Pittel, S.Dimitrova, V.G.Gueorguiev, P.van Isacker

Rank-two Richardson-Gaudin models

NUCLEAR STRUCTURE 64Ge; calculated pair energies.

doi: 10.1142/S0218301306005289
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2006FR09      Phys.Rev. C 73, 061302 (2006)

A.Frank, P.Van Isacker, F.Iachello

Phase transitions in configuration mixed models

NUCLEAR STRUCTURE Cd, Pd, Ru, Mo, Zr, Sr; analyzed two-neutron separation energies, phase transition features.

doi: 10.1103/PhysRevC.73.061302
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2006HI14      Phys.Scr. T125, 158 (2006)

J.G.Hirsch, V.Velazquez, A.Frank, J.Barea, P.Van Isacker, A.P.Zuker

An upper limit of ground-state energy fluctuations in nuclear masses

doi: 10.1088/0031-8949/2006/T125/036
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2006LE30      Phys.Rev. C 74, 024314 (2006)

S.H.Lerma, B.Errea, J.Dukelsky, S.Pittel, P.Van Isacker

Exactly solvable models of proton and neutron interacting bosons

doi: 10.1103/PhysRevC.74.024314
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2006MO41      Int.J.Mod.Phys. E15, 1855 (2006)

I.Morales, A.Frank, J.C.Lopez-Vieyra, J.Barea, J.G.Hirsch, V.Velazquez, P.van Isacker

Predicting nuclear masses by image reconstruction

doi: 10.1142/S0218301306005228
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2006VA18      Int.J.Mod.Phys. E15, 1371 (2006)

P.van Isacker, A.E.L.Dieperink

The symmetry energy in nuclei and in nuclear matter

doi: 10.1142/S0218301306005034
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2005BA24      Phys.Rev.Lett. 94, 102501 (2005)

J.Barea, A.Frank, J.G.Hirsch, P.Van Isacker

Nuclear Masses Set Bounds on Quantum Chaos

doi: 10.1103/PhysRevLett.94.102501
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2005BO38      J.Phys.(London) G31, 1329 (2005)

A.Bouldjedri, P.Van Isacker, S.Zerguine

Configuration mixing in the sdg interacting boson model

doi: 10.1088/0954-3899/31/11/014
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2005HI22      Eur.Phys.J. A 25, Supplement 1, 75 (2005)

J.G.Hirsch, A.Frank, J.Barea, P.Van Isacker, V.Velazquez

Bounds on the presence of quantum chaos in nuclear masses

NUCLEAR STRUCTURE Z=8-120; A=16-280; analyzed atomic masses. Finite-range droplet model, comparison with data and other models.

doi: 10.1140/epjad/i2005-06-050-0
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2005VA16      Phys.Rev.Lett. 94, 162502 (2005)

P.Van Isacker, D.D.Warner, A.Frank

Deuteron Transfer in N = Z Nuclei

doi: 10.1103/PhysRevLett.94.162502
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2004FR12      Phys.Rev. C 69, 034323 (2004)

A.Frank, P.Van Isacker, C.E.Vargas

Evolving shape coexistence in the lead isotopes: The geometry of configuration mixing in nuclei

NUCLEAR STRUCTURE 186,188,190,192Pb; calculated potential energy surfaces, configuration mixing and shape coexistence features. Interacting boson model.

doi: 10.1103/PhysRevC.69.034323
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2004JO11      Phys.Rev. C 70, 011305 (2004)

J.Jolie, S.Heinze, P.Van Isacker, R.F.Casten

Shape phase transitions in odd-mass nuclei using a supersymmetric approach

NUCLEAR STRUCTURE 191,193Os, 195,197Pt, 199Hg; calculated negative-parity energy levels, J; deduced pseudo-orbital angular momentum symmetry conservation.

doi: 10.1103/PhysRevC.70.011305
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2004LE27      Acta Phys.Hung.N.S. 19, 285 (2004)

G.Levai, J.Cseh, P.Van Isacker

A Nuclear Mass Formula Based on Wigner's SU(4) Symmetry

doi: 10.1556/APH.19.2004.3-4.23
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2003BA19      Braz.J.Phys. 33, 250 (2003)

E.Baldini-Neto, C.L.Lima, P.Van Isacker

Binding Energies of Isoscalar and Isovector Ground States of N = Z Nuclei in the Interacting Boson Model

NUCLEAR STRUCTURE 58Cu, 62Ga, 66As, 70Br, 74Rb, 78Y, 82Nb, 86Tc, 90Rh, 94Ag, 98In; calculated binding energies, level energies. Interacting boson model.

doi: 10.1590/s0103-97332003000200014
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2003BB19      Braz.J.Phys. 33, 250 (2003)

E.Baldini-Neto, C.L.Lima, P.Van Isacker

Binding Energies of Isoscalar and Isovector Ground States of N = Z Nuclei in the Interacting Boson Model

NUCLEAR STRUCTURE 58Cu, 62Ga, 66As, 70Br, 74Rb, 78Y, 82Nb, 86Tc, 90Rh, 94Ag, 98In; calculated binding energies, level energies. Interacting boson model.


2003FO02      Phys.Rev. C 67, 024306 (2003)

R.Fossion, K.Heyde, G.Thiamova, P.Van Isacker

Intruder bands and configuration mixing in lead isotopes

NUCLEAR STRUCTURE 186,188,190,192,194,196Pb; calculated levels, J, π, configurations. Interacting boson model, three-configuration mixing calculation, comparisons with data.

doi: 10.1103/PhysRevC.67.024306
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2003LE35      Acta Phys.Hung.N.S. 18, 229 (2003)

G.Levai, J.Cseh, P.Van Isacker

Correlations and Symmetries in the Spectra of Light α-Cluster Systems

NUCLEAR STRUCTURE 18,19F, 20Ne; analyzed α-cluster collective bands, symmetry features.

doi: 10.1556/APH.18.2003.2-4.17
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2003VA22      C.R.Physique 4, 529 (2003)

P.Van Isacker

Pairing and quartetting in exotic nuclei

doi: 10.1016/S1631-0705(03)00054-9
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2002BA58      Phys.Rev. C65, 064303 (2002)

E.Baldini-Neto, C.L.Lima, P.Van Isacker

Binding Energies of T = 0 and T = 1 Ground States of N = Z Nuclei in the Interacting Boson Model

NUCLEAR STRUCTURE 18F, 20Ne, 22Na, 24Mg, 26Al, 28Si, 30P, 32S, 34Cl, 36Ar, 38K, 58Cu, 60Zn, 62Ga, 64Ge, 66As, 68Se, 70Br, 72Kr, 74Rb, 76Sr, 78Y, 80Zr, 82Nb, 84Mo, 86Tc, 88Ru, 90Rh, 92Pd, 94Ag, 96Cd, 98In; calculated binding energies, energy differences between T=0 and T=1 states. Interacting boson model.

doi: 10.1103/PhysRevC.65.064303
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2002CH59      Phys.Rev. C 66, 061302 (2002)

P.Chau Huu-Tai, A.Frank, N.A.Smirnova, P.Van Isacker

Geometry of random interactions

doi: 10.1103/PhysRevC.66.061302
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2002JE07      Phys.Rev. C65, 064307 (2002)

D.G.Jenkins, N.S.Kelsall, C.J.Lister, D.P.Balamuth, M.P.Carpenter, T.A.Sienko, S.M.Fischer, R.M.Clark, P.Fallon, A.Gorgen, A.O.Macchiavelli, C.E.Svensson, R.Wadsworth, W.Reviol, D.G.Sarantites, G.C.Ball, J.Rikovska Stone, O.Juillet, P.Van Isacker, A.V.Afanasjev, S.Frauendorf

T = 0 and T = 1 States in the Odd-Odd N = Z Nucleus, 3570Br35

NUCLEAR REACTIONS 40Ca(32S, np), E=80-100 MeV; 40Ca(36Ar, npα), E=145 MeV; measured Eγ, Iγ, γγ-, (charged particle)γ-, (neutron)γ-coin. 70Br deduced high-spin levels, J, π, isomeric state, relative neutron-proton pairing strength features. Gammasphere, Microball arrays. Comparisons with model predictions.

doi: 10.1103/PhysRevC.65.064307
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2002LE33      Phys.Rev.Lett. 89, 222501 (2002)

A.Leviatan, P.Van Isacker

Generalized Partial Dynamical Symmetry in Nuclei

NUCLEAR STRUCTURE 152Dy; calculated levels, wave functions, transitions B(E2). Generalized partial dynamical symmetry, comparison with data.

doi: 10.1103/PhysRevLett.89.222501
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2002MO15      Phys.Rev. C65, 044322 (2002)

O.Monnoye, S.Pittel, J.Engel, J.R.Bennett, P.Van Isacker

Odd-Mass Nickel Isotopes in a Generalized-Seniority Approach

NUCLEAR STRUCTURE 57,59,61,63,65,67,69Ni; calculated levels, J, π, μ. 66Co, 69Cu; calculated levels, J, π. Comparisons with data. Generalized seniority approximation.

doi: 10.1103/PhysRevC.65.044322
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2002VA14      Nucl.Phys. A704, 232c (2002)

P.Van Isacker

Dynamical Symmetries of the Shell Model

RADIOACTIVITY 18Ne, 58Zn(β+), (EC); calculated log ft.

doi: 10.1016/S0375-9474(02)00783-2
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2002VA21      Eur.Phys.J. A 15, 233 (2002)

P.Van Isacker, O.Juillet

Symmetry in exotic nuclei

NUCLEAR STRUCTURE 62Ga, 62Zn, 66As, 70Br; calculated levels, J, π. IBM-4 calculations.

doi: 10.1140/epja/i2001-10260-6
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