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121 results on '"Fransen CH"'

1. Low-energy Coulomb excitation of $^{62}$Fe and $^{62}$Mn following in-beam decay of $^{62}$Mn

Author

Gaffney, L. P., Van de Walle, J., Bastin, B., Bildstein, V., Blazhev, A., Bree, N., Cederkäll, J., Darby, I., De Witte, H., DiJulio, D., Diriken, J., Fedosseev, V. N., Fransen, Ch., Gernhäuser, R., Gustafsson, A., Hess, H., Huyse, M., Kesteloot, N., Kröll, Th., Lutter, R., Marsh, B. A., Reiter, P., Seidlitz, M., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., Wimmer, K., and Wrzosek-Lipska, K.

Subjects
Nuclear Experiment
Abstract

Sub-barrier Coulomb-excitation was performed on a mixed beam of $^{62}$Mn and $^{62}$Fe, following in-trap $\beta^{-}$ decay of $^{62}$Mn at REX-ISOLDE, CERN. The trapping and charge breeding times were varied in order to alter the composition of the beam, which was measured by means of an ionisation chamber at the zero-angle position of the Miniball array. A new transition was observed at 418~keV, which has been tentatively associated to a $(2^{+},3^{+})\rightarrow1^{+}_{g.s.}$ transition. This fixes the relative positions of the $\beta$-decaying $4^{+}$ and $1^{+}$ states in $^{62}$Mn for the first time. Population of the $2^{+}_{1}$ state was observed in $^{62}$Fe and the cross-section determined by normalisation to the $^{109}$Ag target excitation, confirming the $B(E2)$ value measured in recoil-distance lifetime experiments., Comment: 9 pages, 10 figures

Published
2015
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2. Evolution of E2 transition strength in deformed hafnium isotopes from new measurements on $^{172}$Hf, $^{174}$Hf, and $^{176}$Hf

Author

Rudigier, M., Nomura, K., Dannhoff, M., Gerst, R-B., Jolie, J., Saed-Samii, N., Stegemann, S., Régis, J-M., Robledo, L. M., Rodríguez-Guzmán, R., Blazhev, A., Fransen, Ch., Warr, N., and Zell, K. O.

Subjects
Nuclear Experiment, Nuclear Theory
Abstract

The available data for E2 transition strengths in the region between neutron-deficient Hf and Pt isotopes are far from complete. More and precise data are needed to enhance the picture of structure evolution in this region and to test state-of-the-art nuclear models. In a simple model, the maximum collectivity is expected at the middle of the major shell. However, for actual nuclei, this picture may no longer be the case, and one should use a more realistic nuclear-structure model. We address this point by studying the spectroscopy of Hf. We remeasure the 2^+_1 half-lives of 172,174,176Hf, for which there is some disagreement in the literature. The main goal is to measure, for the first time, the half-lives of higher-lying states of the rotational band. The new results are compared to a theoretical calculation for absolute transition strengths. The half-lives were measured using \gamma-\gamma and conversion-electron-\gamma delayed coincidences with the fast timing method. For the determination of half-lives in the picosecond region, the generalized centroid difference method was applied. For the theoretical calculation of the spectroscopic properties, the interacting boson model is employed, whose Hamiltonian is determined based on microscopic energy-density functional calculations. The measured 2^+_1 half-lives disagree with results from earlier \gamma-\gamma fast timing measurements, but are in agreement with data from Coulomb excitation experiments and other methods. Half-lives of the 4^+_1 and 6^+_1 states were measured, as well as a lower limit for the 8^+_1 states. We show the importance of the mass-dependence of effective boson charge in the description of E2 transition rates in chains of nuclei. It encourages further studies of the microscopic origin of this mass dependence. New data on transition rates in nuclei from neighboring isotopic chains could support these studies., Comment: 16 pages, 16 figures, 7 tables; Abstract shortened due to character limit

Published
2015
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3. Collectivity in the light radon nuclei measured directly via Coulomb excitation

Author

Gaffney, L. P., Robinson, A. P., Jenkins, D. G., Andreyev, A. N., Bender, M., Blazhev, A., Bree, N., Bruyneel, B., Butler, P. A., Cocolios, T. E., Davinson, T., Deacon, A. N., De Witte, H., DiJulio, D., Diriken, J., Ekström, A., Fransen, Ch., Freeman, S. J., Geibel, K., Grahn, T., Hadinia, B., Hass, M., Heenen, P. -H., Hess, H., Huyse, M., Jakobsson, U., Kesteloot, N., Konki, J., Kröll, Th., Kumar, V., Ivanov, O., Martin-Haugh, S., Mücher, D., Orlandi, R., Pakarinen, J., Petts, A., Peura, P., Rahkila, P., Reiter, P., Scheck, M., Seidlitz, M., Singh, K., Smith, J. F., Van de Walle, J., Van Duppen, P., Voulot, D., Wadsworth, R., Warr, N., Wenander, F., Wimmer, K., Wrzosek-Lipska, K., and Zielińska, M.

Subjects
Nuclear Experiment
Abstract

Background: Shape coexistence in heavy nuclei poses a strong challenge to state-of-the-art nuclear models, where several competing shape minima are found close to the ground state. A classic region for investigating this phenomenon is in the region around $Z=82$ and the neutron mid-shell at $N=104$. Purpose: Evidence for shape coexistence has been inferred from $\alpha$-decay measurements, laser spectroscopy and in-beam measurements. While the latter allow the pattern of excited states and rotational band structures to be mapped out, a detailed understanding of shape coexistence can only come from measurements of electromagnetic matrix elements. Method: Secondary, radioactive ion beams of $^{202}$Rn and $^{204}$Rn were studied by means of low-energy Coulomb excitation at the REX-ISOLDE facility in CERN. Results: The electric-quadrupole ($E2$) matrix element connecting the ground state and first-excited $2^{+}_{1}$ state was extracted for both $^{202}$Rn and $^{204}$Rn, corresponding to ${B(E2;2^{+}_{1} \to 2^{+}_{1})=29^{+8}_{-8}}$ W.u. and $43^{+17}_{-12}$ W.u., respectively. Additionally, $E2$ matrix elements connecting the $2^{+}_{1}$ state with the $4^{+}_{1}$ and $2^{+}_{2}$ states were determined in $^{202}$Rn. No excited $0^{+}$ states were observed in the current data set, possibly due to a limited population of second-order processes at the currently-available beam energies. Conclusions: The results are discussed in terms of collectivity and the deformation of both nuclei studied is deduced to be weak, as expected from the low-lying level-energy schemes. Comparisons are also made to state-of-the-art beyond-mean-field model calculations and the magnitude of the transitional quadrupole moments are well reproduced., Comment: 12 pages, 14 figures

Published
2015
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4. Firm spin and parity assignments for high-lying, low-spin levels in stable Si isotopes

Author

Sinclair, J., Scheck, M., Finch, S. W., Krishichayan, Friman-Gayer, U., Tornow, W., Battaglia, G., Beck, T., Chapman, R., Chishti, M. M. R., Fransen, Ch., Gonzales, R., Hoemann, E., Isaak, J., Janssens, R. V. F., Jaroszynski, D. A., Johnson, S., Jones, M. D., Keatings, J. M., Kelly, N., Kleemann, J., Little, D., Löher, B., Mashtakov, K. R., Müscher, M., O’Donnell, D., Papst, O., Peters, E. E., Savran, D., Schilling, M., Schwengner, R., Spagnoletti, P., Spieker, M., Werner, V., Wilhelmy, J., Wieland, O., Yates, S. W., and Zilges, A.

Published
2020
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5. Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of 182Hg, 184Hg, 186Hg and 188Hg

Author

Wrzosek-Lipska, K., Rezynkina, K., Bree, N., Zielińska, M., Gaffney, L. P., Petts, A., Andreyev, A., Bastin, B., Bender, M., Blazhev, A., Bruyneel, B., Butler, P. A., Carpenter, M. P., Cederkäll, J., Clément, E., Cocolios, T. E., Deacon, A. N., Diriken, J., Ekström, A., Fitzpatrick, C., Fraile, L. M., Fransen, Ch., Freeman, S. J., García-Ramos, J. E., Geibel, K., Gernhäuser, R., Grahn, T., Guttormsen, M., Hadinia, B., Hadyńska-Klȩk, K., Hass, M., Heenen, P. -H., Herzberg, R. -D., Hess, H., Heyde, K., Huyse, M., Ivanov, O., Jenkins, D. G., Julin, R., Kesteloot, N., Kröll, Th., Krücken, R., Larsen, A. C., Lutter, R., Marley, P., Napiorkowski, P. J., Orlandi, R., Page, R. D., Pakarinen, J., Patronis, N., Peura, P. J., Piselli, E., Próchniak, L., Rahkila, P., Rapisarda, E., Reiter, P., Robinson, A. P., Scheck, M., Siem, S., Singh Chakkal, K., Smith, J. F., Srebrny, J., Stefanescu, I., Tveten, G. M., Van Duppen, P., Van de Walle, J., Voulot, D., Warr, N., Wiens, A., and Wood, J. L.

Published
2019
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6. Quadrupole and octupole collectivity in the semi-magic nucleus 80206Hg126

Author

Morrison, L., primary, Hadyńska-Klȩk, K., additional, Podolyák, Zs., additional, Gaffney, L.P., additional, Zielińska, M., additional, Brown, B.A., additional, Grawe, H., additional, Stevenson, P.D., additional, Berry, T., additional, Boukhari, A., additional, Brunet, M., additional, Canavan, R., additional, Catherall, R., additional, Cederkäll, J., additional, Colosimo, S.J., additional, Cubiss, J.G., additional, De Witte, H., additional, Doherty, D.T., additional, Fransen, Ch., additional, Georgiev, G., additional, Giannopoulos, E., additional, Górska, M., additional, Hess, H., additional, Kaya, L., additional, Kröll, T., additional, Lalović, N., additional, Marsh, B., additional, Martinez Palenzuela, Y., additional, O'Neill, G., additional, Pakarinen, J., additional, Ramos, J.P., additional, Reiter, P., additional, Rodriguez, J.A., additional, Rosiak, D., additional, Rothe, S., additional, Rudigier, M., additional, Siciliano, M., additional, Simpson, E.C., additional, Snall, J., additional, Spagnoletti, P., additional, Thiel, S., additional, Warr, N., additional, Wenander, F., additional, and Zidarova, R., additional

Published
2023
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7. Quadrupole and octupole collectivity in the semi-magic nucleus Hg

Author

Morrison, L., Hadyńska-Klȩk, K., Podolyák, Zs., Gaffney, L.P., Zielińska, M., Brown, B.A., Grawe, H., Stevenson, P.D., Berry, T., Boukhari, A., Brunet, M., Canavan, R., Catherall, R., Cederkäll, J., Colosimo, S.J., Cubiss, J.G., De Witte, H., Doherty, D.T., Fransen, Ch., Georgiev, G., Giannopoulos, E., Górska, M., Hess, H., Kaya, L., Kröll, T., Lalović, N., Marsh, B., Martinez Palenzuela, Y., O'Neill, G., Pakarinen, J., Ramos, J.P., Reiter, P., Rodriguez, J.A., Rosiak, D., Rothe, S., Rudigier, M., Siciliano, M., Simpson, E.C., Snall, J., Spagnoletti, P., Thiel, S., Warr, N., Wenander, F., and Zidarova, R.

Abstract

The first low-energy Coulomb-excitation measurement of the radioactive, semi-magic, two proton-hole nucleus $^{206}$Hg, was performed at CERN's recently-commissioned HIE-ISOLDE facility. Two γ rays depopulating low-lying states in $^{206}$Hg were observed. From the data, a reduced transition strength B(E2;21+→01+)=4.4(6) W.u. was determined, the first such value for an N=126 nucleus south of $^{208}$Pb, which is found to be slightly lower than that predicted by shell-model calculations. In addition, a collective octupole state was identified at an excitation energy of 2705 keV, for which a reduced B(E3) transition probability of 30−13+10 W.u. was extracted. These results are crucial for understanding both quadrupole and octupole collectivity in the vicinity of the heaviest doubly-magic nucleus $^{208}$Pb, and for benchmarking a number of theoretical approaches in this key region. This is of particular importance given the paucity of data on transition strengths in this region, which could be used, in principle, to test calculations relevant to the astrophysical r-process.

Published
2023

8. Quadrupole and octupole collectivity in the semi-magic nucleus 80206Hg126

Author

Morrison, L., Hadyńska-Klȩk, K., Podolyák, Zs., Gaffney, L.P., Zielińska, M., Brown, B.A., Grawe, H., Stevenson, P.D., Berry, T., Boukhari, A., Brunet, M., Canavan, R., Catherall, R., Cederkäll, J., Colosimo, S.J., Cubiss, J.G., de Witte, H., Doherty, D.T., Fransen, Ch., Georgiev, G., Giannopoulos, E., Górska, M., Hess, H., Kaya, L., Kröll, T., Lalović, N., Marsh, B., Martinez Palenzuela, Y., O'Neill, G., Pakarinen, J., Ramos, J.P., Reiter, P., Rodriguez, J.A., Rosiak, D., Rothe, S., Rudigier, M., Siciliano, M., Simpson, E.C., Snall, J., Spagnoletti, P., Thiel, S., Warr, N., Wenander, F., Zidarova, R., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), and Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; The first low-energy Coulomb-excitation measurement of the radioactive, semi-magic, two proton-hole nucleus 206Hg, was performed at CERN's recently-commissioned HIE-ISOLDE facility. Two γ rays depopulating low-lying states in 206Hg were observed. From the data, a reduced transition strength B(E2;21+→01+)=4.4(6) W.u. was determined, the first such value for an N=126 nucleus south of 208Pb, which is found to be slightly lower than that predicted by shell-model calculations. In addition, a collective octupole state was identified at an excitation energy of 2705 keV, for which a reduced B(E3) transition probability of 30−13+10 W.u. was extracted. These results are crucial for understanding both quadrupole and octupole collectivity in the vicinity of the heaviest doubly-magic nucleus 208Pb, and for benchmarking a number of theoretical approaches in this key region. This is of particular importance given the paucity of data on transition strengths in this region, which could be used, in principle, to test calculations relevant to the astrophysical r-process.

Published
2023
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9. Conceptual design and infrastructure for the installation of the first AGATA sub-array at LNL

Author

Gadea, A., Farnea, E., Valiente-Dobón, J.J., Million, B., Mengoni, D., Bazzacco, D., Recchia, F., Dewald, A., Pissulla, Th., Rother, W., de Angelis, G., Austin, A., Aydin, S., Badoer, S., Bellato, M., Benzoni, G., Berti, L., Beunard, R., Birkenbach, B., Bissiato, E., Blasi, N., Boiano, C., Bortolato, D., Bracco, A., Brambilla, S., Bruyneel, B., Calore, E., Camera, F., Capsoni, A., Chavas, J., Cocconi, P., Coelli, S., Colombo, A., Conventi, D., Costa, L., Corradi, L., Corsi, A., Cortesi, A., Crespi, F.C.L., Dosme, N., Eberth, J., Fantinel, S., Fanin, C., Fioretto, E., Fransen, Ch., Giaz, A., Gottardo, A., Grave, X., Grebosz, J., Griffiths, R., Grodner, E., Gulmini, M., Habermann, T., He, C., Hess, H., Isocrate, R., Jolie, J., Jones, P., Latina, A., Legay, E., Lenzi, S., Leoni, S., Lelli, F., Lersch, D., Lunardi, S., Maron, G., Menegazzo, R., Michelagnoli, C., Molini, P., Montagnoli, G., Montanari, D., Möller, O., Napoli, D.R., Nicoletto, M., Nicolini, R., Ozille, M., Pascovici, G., Peghin, R., Pignanelli, M., Pucknell, V., Pullia, A., Ramina, L., Rampazzo, G., Rebeschini, M., Reiter, P., Riboldi, S., Rigato, M., Rossi Alvarez, C., Rosso, D., Salvato, G., Strachan, J., Sahin, E., Scarlassara, F., Simpson, J., Stefanini, A.M., Stezowski, O., Tomasi, F., Toniolo, N., Triossi, A., Turcato, M., Ur, C.A., Vandone, V., Venturelli, R., Veronese, F., Veyssiere, C., Viscione, E., Wieland, O., Wiens, A., Zocca, F., and Zucchiatti, A.

Published
2011
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11. Coulomb excitation of 107Sn

Author

DiJulio, D. D., Cederkall, J., Fahlander, C., Ekström, A., Hjorth-Jensen, M., Albers, M., Bildstein, V., Blazhev, A., Darby, I., Davinson, T., De Witte, H., Diriken, J., Fransen, Ch., Geibel, K., Gernhäuser, R., Görgen, A., Hess, H., Iwanicki, J., Lutter, R., Reiter, P., Scheck, M., Seidlitz, M., Siem, S., Taprogge, J., Tveten, G. M., Van de Walle, J., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Published
2012
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12. Population of lead isotopes in binary reactions using a Rb-94 radioactive beam

Author

European Commission, Science and Technology Facilities Council (UK), Croatian Science Foundation, Federal Ministry of Education and Research (Germany), Colovic, P., Szilner, S., Illana, A., Valiente-Dobón, J.J., Corradi, L., Pollarolo, G., Mijatovic, T., Goasduff, A., Benzoni, G., García Borge, María José, Boso, A., Boukhari, A., Ceruti, S., Cubiss, J.G., Angelis, G. de, Witte, H. de, Fioretto, E., Fransen, Ch., Galtarossa, F., Gaffney, L.P., Giannopoulos, E., Hess, H., Jurado-Gómez, M.L., Kaya, L., Kröll, Th., Marchi, T., Menegazzo, R., Mengoni, D., Napoli, D.R., O'Neill, G., Pakarinen, J., Podolyák, Zs., Recchia, F., Reiter, P., Rosiak, D., Snall, J., Spagnoletti, P., Testov, D., Thiel, S., Warr, N., Zidarova, R., European Commission, Science and Technology Facilities Council (UK), Croatian Science Foundation, Federal Ministry of Education and Research (Germany), Colovic, P., Szilner, S., Illana, A., Valiente-Dobón, J.J., Corradi, L., Pollarolo, G., Mijatovic, T., Goasduff, A., Benzoni, G., García Borge, María José, Boso, A., Boukhari, A., Ceruti, S., Cubiss, J.G., Angelis, G. de, Witte, H. de, Fioretto, E., Fransen, Ch., Galtarossa, F., Gaffney, L.P., Giannopoulos, E., Hess, H., Jurado-Gómez, M.L., Kaya, L., Kröll, Th., Marchi, T., Menegazzo, R., Mengoni, D., Napoli, D.R., O'Neill, G., Pakarinen, J., Podolyák, Zs., Recchia, F., Reiter, P., Rosiak, D., Snall, J., Spagnoletti, P., Testov, D., Thiel, S., Warr, N., and Zidarova, R.

Abstract

We measured absolute cross sections for neutron transfer channels populated in the Rb-94 + Pb-208 binary reaction. Cross sections have been extracted identifying directly the lead isotopes with the high efficiency MINIBALL gamma-ray array coupled to a particle detector combined with a radioactive Rb-94 beam delivered at E-lab = 6.2 MeV/nucleon by the HIE-ISOLDE facility. We observed sizable cross sections in the neutron-rich mass region, where the heavy partner acquires neutrons. A fair agreement between the measured cross sections with those from GRAZING calculations gives confidence in the cross-section predictions of more neutron-rich nuclei produced via a larger number of transferred nucleons.

Published
2020

13. Population of lead isotopes in binary reactions using a Rb-94 radioactive beam

Author

Colovic, P., Szilner, S., Illana, A., Valiente-Dobon, J. J., Corradi, L., Pollarolo, G., Mijatovic, T., Goasduff, A., Benzoni, G., Borge, M. J. G., Boso, A., Boukhari, A., Ceruti, S., Cubiss, J. G., de Angelis, G., De Witte, H., Fioretto, E., Fransen, Ch, Galtarossa, F., Gaffney, L. P., Giannopoulos, E., Hess, H., Jurado-Gomez, M. L., Kaya, L., Kroell, Th, Marchi, T., Menegazzo, R., Mengoni, D., Napoli, D. R., O'Neill, G., Pakarinen, J., Podolyak, Zs, Recchia, F., Reiter, P., Rosiak, D., Snall, J., Spagnoletti, P., Testov, D., Thiel, S., Warr, N., Zidarova, R., Colovic, P., Szilner, S., Illana, A., Valiente-Dobon, J. J., Corradi, L., Pollarolo, G., Mijatovic, T., Goasduff, A., Benzoni, G., Borge, M. J. G., Boso, A., Boukhari, A., Ceruti, S., Cubiss, J. G., de Angelis, G., De Witte, H., Fioretto, E., Fransen, Ch, Galtarossa, F., Gaffney, L. P., Giannopoulos, E., Hess, H., Jurado-Gomez, M. L., Kaya, L., Kroell, Th, Marchi, T., Menegazzo, R., Mengoni, D., Napoli, D. R., O'Neill, G., Pakarinen, J., Podolyak, Zs, Recchia, F., Reiter, P., Rosiak, D., Snall, J., Spagnoletti, P., Testov, D., Thiel, S., Warr, N., and Zidarova, R.

Abstract

We measured absolute cross sections for neutron transfer channels populated in the Rb-94 + Pb-208 binary reaction. Cross sections have been extracted identifying directly the lead isotopes with the high efficiency MINIBALL gamma-ray array coupled to a particle detector combined with a radioactive Rb-94 beam delivered at E-lab = 6.2 MeV/nucleon by the HIE-ISOLDE facility. We observed sizable cross sections in the neutron-rich mass region, where the heavy partner acquires neutrons. A fair agreement between the measured cross sections with those from GRAZING calculations gives confidence in the cross-section predictions of more neutron-rich nuclei produced via a larger number of transferred nucleons.

Published
2020

14. Dealing with contaminants in Coulomb excitation of radioactive beams

Author

Morrison, L, primary, Hadyńska-Klęk, K, additional, Podolyák, Zs, additional, Gaffney, L P, additional, Kaya, L, additional, Berry, T, additional, Boukhari, A, additional, Brunet, M, additional, Canavan, R, additional, Catherall, R, additional, Colosimo, S J, additional, Cubiss, J G, additional, Witte, H De, additional, Doherty, D T, additional, Fransen, Ch, additional, Giannopoulos, E, additional, Grawe, H, additional, Hess, H, additional, Kröll, T, additional, Lalović, N, additional, Marsh, B, additional, Martinez Palenzuela, Y, additional, O’Neill, G, additional, Pakarinen, J, additional, Ramos, J P, additional, Reiter, P, additional, Rodriguez, J A, additional, Rosiak, D, additional, Rothe, S, additional, Rudigier, M, additional, Siciliano, M, additional, Simpson, E C, additional, Spagnoletti, P, additional, Thiel, S, additional, Warr, N, additional, Wenander, F, additional, Zidarova, R, additional, and Zielińska, M, additional

Published
2020
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15. Population of lead isotopes in binary reactions using a Rb94 radioactive beam

Author

Čolović, P., primary, Szilner, S., additional, Illana, A., additional, Valiente-Dobón, J. J., additional, Corradi, L., additional, Pollarolo, G., additional, Mijatović, T., additional, Goasduff, A., additional, Benzoni, G., additional, Borge, M. J. G., additional, Boso, A., additional, Boukhari, A., additional, Ceruti, S., additional, Cubiss, J. G., additional, de Angelis, G., additional, De Witte, H., additional, Fioretto, E., additional, Fransen, Ch., additional, Galtarossa, F., additional, Gaffney, L. P., additional, Giannopoulos, E., additional, Hess, H., additional, Jurado-Gomez, M. L., additional, Kaya, L., additional, Kröll, Th., additional, Marchi, T., additional, Menegazzo, R., additional, Mengoni, D., additional, Napoli, D. R., additional, O'Neill, G., additional, Pakarinen, J., additional, Podolyák, Zs., additional, Recchia, F., additional, Reiter, P., additional, Rosiak, D., additional, Snall, J., additional, Spagnoletti, P., additional, Testov, D., additional, Thiel, S., additional, Warr, N., additional, and Zidarova, R., additional

Published
2020
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16. Quadrupole deformation of Xe130 measured in a Coulomb-excitation experiment

Author

Morrison, L., primary, Hadyńska-Klȩk, K., additional, Podolyák, Zs., additional, Doherty, D. T., additional, Gaffney, L. P., additional, Kaya, L., additional, Próchniak, L., additional, Samorajczyk-Pyśk, J., additional, Srebrny, J., additional, Berry, T., additional, Boukhari, A., additional, Brunet, M., additional, Canavan, R., additional, Catherall, R., additional, Colosimo, S. J., additional, Cubiss, J. G., additional, De Witte, H., additional, Fransen, Ch., additional, Giannopoulos, E., additional, Hess, H., additional, Kröll, T., additional, Lalović, N., additional, Marsh, B., additional, Palenzuela, Y. Martinez, additional, Napiorkowski, P. J., additional, O'Neill, G., additional, Pakarinen, J., additional, Ramos, J. P., additional, Reiter, P., additional, Rodriguez, J. A., additional, Rosiak, D., additional, Rothe, S., additional, Rudigier, M., additional, Siciliano, M., additional, Snäll, J., additional, Spagnoletti, P., additional, Thiel, S., additional, Warr, N., additional, Wenander, F., additional, Zidarova, R., additional, and Zielińska, M., additional

Published
2020
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17. Electromagnetic properties of low-lying states in neutron-deficient Hg isotopes: Coulomb excitation of Hg-182, Hg-184, Hg-186 and Hg-188

Author

Wrzosek-Lipska, K., Rezynkina, K., Bree, N., Zielinska, M., Gaffney, L. P., Petts, A., Andreyev, A., Bastin, B., Bender, M., Blazhev, A., Bruyneel, B., Butler, P. A., Carpenter, M. P., Cederkall, J., Clement, E., Cocolios, T. E., Deacon, A. N., Diriken, J., Ekstrom, A., Fitzpatrick, C., Fraile, L. M., Fransen, Ch., Freeman, S. J., Garcia-Ramos, J. E., Geibel, K., Gernhauser, R., Grahn, T., Guttormsen, M., Hadinia, B., Hadynska-Klek, K., Hass, M., Heenen, P. -H., Herzberg, R. -D., Hess, H., Heyde, K., Huyse, M., Ivanov, O., Jenkins, D. G., Julin, R., Kesteloot, N., Kroell, Th., Kruecken, R., Larsen, A. C., Lutter, R., Marley, P., Napiorkowski, P. J., Orlandi, R., Page, R. D., Pakarinen, J., Patronis, N., Peura, P. J., Piselli, E., Prochniak, L., Rahkila, P., Rapisarda, E., Reiter, P., Robinson, A. P., Scheck, M., Siem, S., Chakkal, K. Singh, Smith, J. F., Srebrny, J., Stefanescu, I., Tveten, G. M., Van Duppen, P., Van de Walle, J., Voulot, D., Warr, N., Wiens, A., Wood, J. L., Wrzosek-Lipska, K., Rezynkina, K., Bree, N., Zielinska, M., Gaffney, L. P., Petts, A., Andreyev, A., Bastin, B., Bender, M., Blazhev, A., Bruyneel, B., Butler, P. A., Carpenter, M. P., Cederkall, J., Clement, E., Cocolios, T. E., Deacon, A. N., Diriken, J., Ekstrom, A., Fitzpatrick, C., Fraile, L. M., Fransen, Ch., Freeman, S. J., Garcia-Ramos, J. E., Geibel, K., Gernhauser, R., Grahn, T., Guttormsen, M., Hadinia, B., Hadynska-Klek, K., Hass, M., Heenen, P. -H., Herzberg, R. -D., Hess, H., Heyde, K., Huyse, M., Ivanov, O., Jenkins, D. G., Julin, R., Kesteloot, N., Kroell, Th., Kruecken, R., Larsen, A. C., Lutter, R., Marley, P., Napiorkowski, P. J., Orlandi, R., Page, R. D., Pakarinen, J., Patronis, N., Peura, P. J., Piselli, E., Prochniak, L., Rahkila, P., Rapisarda, E., Reiter, P., Robinson, A. P., Scheck, M., Siem, S., Chakkal, K. Singh, Smith, J. F., Srebrny, J., Stefanescu, I., Tveten, G. M., Van Duppen, P., Van de Walle, J., Voulot, D., Warr, N., Wiens, A., and Wood, J. L.

Abstract

The neutron-deficient mercury isotopes serve as a classical example of shape coexistence, whereby at low energy near-degenerate nuclear states characterized by different shapes appear. The electromagnetic structure of even-mass 182-188 Hg isotopes was studied using safe-energy Coulomb excitation of neutron-deficient mercury beams delivered by the REX-ISOLDE facility at CERN. The population of 0 + 1,2, 2(1,2)(+) and 4(1)(+) states was observed in all nuclei under study. Reduced E2 matrix elements coupling populated yrast and non-yrast states were extracted, including their relative signs. These are a sensitive probe of shape coexistence and may be used to validate nuclear models. The experimental results are discussed in terms of mixing of two different configurations and are compared with three different model calculations: the Beyond Mean Field model, the Interacting Boson Model with configuration mixing and the General Bohr Hamiltonian. Partial agreement with experiment was observed, hinting to missing ingredients in the theoretical descriptions.

Published
2019

18. Study of the deformation-driving νd5/2 orbital in 6728Ni39 using one-neutron transfer reactions

Author

Diriken, J., Patronis, N., Andreyev, A.N., Antalic, S., Bildstein, V., Blazhev, A., Darby, I.G., De Witte, H., Eberth, J., Elseviers, J., Fedosseev, V.N., Flavigny, F., Fransen, Ch., Georgiev, G., Gernhauser, R., Hess, H., Huyse, M., Jolie, J., Kröll, Th., Krücken, R., Lutter, R., Marsh, B.A., Mertzimekis, T., Muecher, D., Nowacki, F., Orlandi, R., Pakou, A., Raabe, R., Randisi, G., Reiter, P., Roger, T., Seidlitz, M., Seliverstov, M., Sieja, K., Sotty, C., Tornqvist, H., Van De Walle, J., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Subjects
Nuclear and High Energy Physics
Published
2014
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19. Precise measurement of energies in Sn115 following the (n,γ) reaction

Author

Urban, W., Köster, U., Jentschel, M., Mutti, P., Märkisch, B., Rząca-Urban, T., Bernards, Ch., Fransen, Ch., Jolie, J., Thomas, T., Simpson, G.S., Institut Laue-Langevin (ILL), ILL, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), and Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], Nuclear Experiment
Abstract

International audience; The first measurement of γ rays from the Sn114(n,γ) reaction using cold neutrons, performed with an array of Ge detectors at the PF1B facility of the Institute Laue-Langevin in Grenoble, has provided the most accurate energy, Qβ=173(12) eV, of β− decay of the In115 ground state to the first excited state in Sn115. This is the lowest of all such energies in the known nuclear landscape. The accuracy of the neutron binding energy of Sn115 and the mass of Sn114 have been improved.

Published
2016
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20. Low-energy Coulomb excitation of Fe-62 and Mn-62 following in-beam decay of Mn-62

Author

Gaffney, LP, Van de Walle, J, Bastin, B, Bildstein, V, Blazhev, A, Bree, N, Cederkall, J, Darby, I, De Witte, H, DiJulio, D, Diriken, J, Fedosseev, VN, Fransen, Ch, Gernhaeuser, R, Gustafsson, A, Hess, H, Huyse, M, Kesteloot, N, Kroell, Th, Lutter, R, Marsh, BA, Reiter, P, Seidlitz, M, Van Duppen, P, Voulot, D, Warr, N, Wenander, F, Wimmer, K, and Wrzosek-Lipska, K

Published
2015

21. Erratum to 'Study of the deformation-driving νd5/2νd5/2 orbital in 6728Ni39 using one-neutron transfer reactions

Author

Diriken, J., Patronis, N., Andreyev, A.N., Antalic, S., Bildstein, V., Blazhev, A., Darby, I.G., Witte, H. De, Eberth, J., Elseviers, J., Fedosseev, V.N., Flavigny, F., Fransen, Ch., Georgiev, G., Gernhauser, R., Hess, H., Huyse, M., Jolie, J., Kröll, Th., Krücken, R., Lutter, R., Marsh, B.A., Mertzimekis, T., Muecher, D., Nowacki, F., Orlandi, R., Pakou, A., Raabe, R., Randisi, G., Reiter, P., Roger, T., Seidlitz, M., Seliverstov, M., Sieja, K., Sotty, C., Tornqvist, H., Walle, J. Van De, Duppen, P. Van, Voulot, D., Warr, N., Wenander, F., Wimmer, K., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire Départemental de Préhistoire du Lazaret (LDPL), and Département des Alpes-Maritimes

Subjects
[PHYS]Physics [physics], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ComputingMilieux_MISCELLANEOUS
Abstract

International audience

Published
2015
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22. Erratum to 'Study of the deformation-driving D Orbital in Ni using one-neutron transfer reactions' [Phys. Lett. B 736 (2014) 533–538]

Author

Diriken, J., Patronis, N., Andreyev, A.N., Antalic, S., Bildstein, V., Blazhev, A., Darby, I.G., De Witte, H., Eberth, J., Elseviers, J., Fedosseev, V.N., Flavigny, F., Fransen, Ch., Georgiev, G., Gernhauser, R., Hess, H., Huyse, M., Jolie, J., Kröll, Th., Krücken, R., Lutter, R., Marsh, B.A., Mertzimekis, T., Muecher, D., Nowacki, F., Orlandi, R., Pakou, A., Raabe, R., Randisi, G., Reiter, P., Roger, T., Seidlitz, M., Seliverstov, M., Sieja, K., Sotty, C., Tornqvist, H., Van De Walle, J., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Published
2015

23. Precise measurement of energies in Sn-115 following the (n,gamma) reaction

Author

Urban, W., Koster, U., Jentschel, M., Mutti, P., Maerkisch, B., Rzaca-Urban, T., Bernards, Ch., Fransen, Ch., Jolie, J., Thomas, T., Simpson, G. S., Urban, W., Koster, U., Jentschel, M., Mutti, P., Maerkisch, B., Rzaca-Urban, T., Bernards, Ch., Fransen, Ch., Jolie, J., Thomas, T., and Simpson, G. S.

Abstract

The first measurement of. rays from the Sn-114(n,gamma) reaction using cold neutrons, performed with an array of Ge detectors at the PF1B facility of the Institute Laue-Langevin in Grenoble, has provided the most accurate energy, Q(beta) = 173(12) eV, of beta(-) decay of the In-115 ground state to the first excited state in Sn-115. This is the lowest of all such energies in the known nuclear landscape. The accuracy of the neutron binding energy of Sn-115 and the mass of Sn-114 have been improved.

Published
2016

24. Study of the deformation-driving vd5/2 orbital in 6728Ni39 using one-neutron transfer reactions

Author

Diriken, J., Patronis, N., Andreyev, A.N., Antalic, S., Bildstein, V., Blazhev, A., Darby, I.G., De Witte, H., Eberth, J., Elseviers, J., Fedosseev, V.N., Flavigny, F., Fransen, Ch., Georgiev, G., Gernhauser, R., Hess, H., Huyse, M., Jolie, J., Kröll, Th., Krücken, R., Lutter, R., Marsh, B.A., Mertzimekis, T., Muecher, D., Nowacki, F., Orlandi, R., Pakou, A., Raabe, R., Randisi, G., Reiter, P., Roger, T., Seidlitz, M., Seliverstov, M., Sieja, K., Sotty, C., Tornqvist, H., Van De Walle, J., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Abstract

The ν g 9 / 2 , d 5 / 2 , s 1 / 2 orbitals are assumed to be responsible for the swift onset of collectivity observed in the region below 68Ni. Especially the single-particle energies and strengths of these orbitals are of importance. We studied such properties in the nearby 67Ni nucleus, by performing a ( d , p ) -experiment in inverse kinematics employing a post-accelerated radioactive ion beam (RIB) at the REX-ISOLDE facility. The experiment was performed at an energy of 2.95 MeV/u using a combination of the T-REX particle detectors, the Miniball γ-detection array and a newly-developed delayed-correlation technique as to investigate μs-isomers. Angular distributions of the ground state and multiple excited states in 67Ni were obtained and compared with DWBA cross-section calculations, leading to the identification of positive-parity states with substantial ν g 9 / 2 (1007 keV) and ν d 5 / 2 (2207 keV and 3277 keV) single-particle strengths up to an excitation energy of 5.8 MeV. 50% of the ν d 5 / 2 single-particle strength relative to the ν g 9 / 2 -orbital is concentrated in and shared between the first two observed 5 / 2 + levels. A comparison with extended Shell Model calculations and equivalent (3He, d) studies in the region around 9040Zr50 highlights similarities for the strength of the negative-parity pf and positive-parity g 9 / 2 state, but differences are observed for the d 5 / 2 single-particle strength.

Published
2014

25. Study of the deformation-driving νd5/2 orbital in 67 28 Ni 39 using one-neutron transfer reactions

Author

Diriken, J., Patronis, N., Andreyev, A.N., Antalic, S., Bildstein, V., Blazhev, A., Darby, I.G., De Witte, H., Eberth, J., Elseviers, J., Fedosseev, V.N., Flavigny, F., Fransen, Ch., Georgiev, G., Gernhauser, R., Hess, H., Huyse, M., Jolie, J., Kröll, Th., Krücken, R., Lutter, R., Marsh, B.A., Mertzimekis, T., Muecher, D., Nowacki, F., Orlandi, R., Pakou, A., Raabe, R., Randisi, G., Reiter, P., Roger, T., Seidlitz, M., Seliverstov, M., Sieja, K., Sotty, C., Tornqvist, H., Van De Walle, J., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Abstract

The νg9/2,d5/2,s1/2 orbitals are assumed to be responsible for the swift onset of collectivity observed in the region below 68 Ni. Especially the single-particle energies and strengths of these orbitals are of importance. We studied such properties in the nearby 67 Ni nucleus, by performing a (d,p) -experiment in inverse kinematics employing a post-accelerated radioactive ion beam (RIB) at the REX-ISOLDE facility. The experiment was performed at an energy of 2.95 MeV/u using a combination of the T-REX particle detectors, the Miniball γ -detection array and a newly-developed delayed-correlation technique as to investigate μs-isomers. Angular distributions of the ground state and multiple excited states in 67 Ni were obtained and compared with DWBA cross-section calculations, leading to the identification of positive-parity states with substantial νg9/2 (1007 keV) and νd5/2 (2207 keV and 3277 keV) single-particle strengths up to an excitation energy of 5.8 MeV. 50% of the νd5/2 single-particle strength relative to the νg9/2 -orbital is concentrated in and shared between the first two observed 5/2+ levels. A comparison with extended Shell Model calculations and equivalent ( 3 He, d ) studies in the region around 90 40 Zr 50 highlights similarities for the strength of the negative-parity pf and positive-parity g9/2 state, but differences are observed for the d5/2 single-particle strength.

Published
2014

26. Shape coexistence in the neutron-deficient even-even Hg182-188 isotopes studied via Coulomb excitation

Author

Bree, N., Wrzosek-Lipska, K., Petts, A., Andreyev, A., Bastin, B., Bender, M., Blazhev, A., Bruyneel, B., Butler, P. A., Butterworth, J., Carpenter, M. P., Cederkaell, J., Clement, E., Cocolios, T. E., Deacon, A., Diriken, J., Ekstroem, A., Fitzpatrick, C., Fraile, L. M., Fransen, Ch, Sean Freeman, Gaffney, L. P., Garcia-Ramos, J. E., Geibel, K., Gernhaeuser, R., Grahn, T., Guttormsen, M., Hadinia, B., Hadynska-Klek, K., Hass, M., Heenen, P. -H, Herzberg, R. -D, Hess, H., Heyde, K., Huyse, M., Ivanov, O., Jenkins, D. G., Julin, R., Kesteloot, N., Kroell, Th, Kruecken, R., Larsen, A. C., Lutter, R., Marley, P., Napiorkowski, P. J., Orlandi, R., Page, R. D., Pakarinen, J., Patronis, N., Peura, P. J., Piselli, E., Rahkila, P., Rapisarda, E., Reiter, P., Robinson, A. P., Scheck, M., Siem, S., Chakkal, K. Singh, Smith, J. F., Srebrny, J., Stefanescu, I., Tveten, G. M., Duppen, P., Walle, J., Voulot, D., Warr, N., Wenander, F., Wiens, A., Wood, J. L., and Zielinska, M.

Subjects
isotoopit, Physics and Astronomy, STATES, NUCLEI, MOMENTS, REX-ISOLDE, INTRUDER, shape coexistence, HG-186, PB
Abstract

Coulomb-excitation experiments to study electromagnetic properties of radioactive even-even Hg isotopes were performed with 2.85 MeV/nucleon mercury beams from REX-ISOLDE. Magnitudes and relative signs of the reduced E2 matrix elements that couple the ground state and low-lying excited states in Hg182-188 were extracted. Information on the deformation of the ground and the first excited 0+ states was deduced using the quadrupole sum rules approach. Results show that the ground state is slightly deformed and of oblate nature, while a larger deformation for the excited 0+ state was noted in Hg182,184. The results are compared to beyond mean field and interacting-boson based models and interpreted within a two-state mixing model. Partial agreement with the model calculations was obtained. The presence of two different structures in the light even-mass mercury isotopes that coexist at low excitation energy is firmly established. ispartof: PHYSICAL REVIEW LETTERS vol:112 issue:16 ispartof: location:United States status: published

Published
2014

27. Study of the deformation-driving $\nu d_{5/2}$ orbital in $^{67}_{28}$Ni$_{39}$ using one-neutron transfer reactions

Author

Diriken, J., Patronis, N., Andreyev, A.N., Antalic, S., Bildstein, V., Blazhev, A., Darby, I.G., De Witte, H., Eberth, J., Elseviers, J., Fedosseev, V.N., Flavigny, F., Fransen, Ch., Georgiev, G., Gernhauser, R., Hess, H., Huyse, M., Jolie, J., Kröll, Th., Krücken, R., Lutter, R., Marsh, B.A., Mertzimekis, T., Muecher, D., Nowacki, F., Orlandi, R., Pakou, A., Raabe, R., Randisi, G., Reiter, P., Roger, T., Seidlitz, M., Seliverstov, M., Sieja, K., Sotty, C., Tornqvist, H., Van De Walle, J., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Subjects
Nuclear Physics - Experiment
Abstract

The $νg_{9/2} , d_{5/2}, s_{1/2}$ orbitals are assumed to be responsible for the swift onset of collectivity observed in the region below $^{68}$Ni. Especially the single-particle energies and strengths of these orbitals are of importance. We studied such properties in the nearby $^{67}$Ni nucleus, by performing a ($d, p$)-experiment in inverse kinematics employing a post-accelerated radioactive ion beam (RIB) at the REX-ISOLDE facility. The experiment was performed at an energy of 2.95 MeV / u using a combination of the T-REX particle detectors, the Miniball $\gamma$-detection array and a newly-developed delayed-correlation technique as to investigate $\mu$s-isomers. Angular distributions of the ground state and multiple excited states in $^{67}$Ni were obtained and compared with DWBA cross-section calculations, leading to the identification of positive-parity states with substantial $νg_{9/2}$ (1007 keV) and $νd_{5/2}$ (2207 keV and 3277 keV) single- particle strengths up to an excitation energy of 5.8 MeV. 50% of the $νd_{5/2}$ single-particle strength relative to the $νg_{9/2}$-orbital is concentrated in and shared between the first two observed 5/2$^{+}$ levels. A comparison with extended Shell Model calculations and equivalent ($^{3}$He, $d$) studies in the region around $^{90}_{40}$Zr$_{50}$ highlights similarities for the strength of the negative-parity pf and positive-parity $g_{9/2}$ state, but differences are observed for the $d_{5/2}$ single-particle strength.

Published
2014

28. Shape Coexistence in the Neutron-Deficient Even-Even 182−188Hg Isotopes Studied via Coulomb Excitation

Author

Bree, N., Wrzosek-Lipska, K., Petts, A., Andreyev, A.N., Bastin, B., Bender, M., Blazhev, A., Bruyneel, B., Butler, P.A., Butterworth, J., Carpenter, M.P., Cederkäll, J., Clément, E., Cocolios, T.E., Deacon, A., Diriken, J., Ekström, A., Fitzpatrick, C., Fraile, L.M., Fransen, Ch., Freeman, S.J., Gaffney, L.P., Garcia-Ramos, J.E., Geibel, K., Gernhäuser, R., Grahn, T., Guttormsen, M., Hadinia, B., Hadyńska-Klek, K., Hass, M., Heenen, P.-H., Herzberg, R.-D., Hess, H., Heyde, K., Huyse, M., Ivanov, O., Jenkins, D.G., Julin, R., Kesteloot, N., Kröll, Th., Krücken, R., Larsen, A.C., Lutter, R., Marley, P., Napiorkowski, P.J., Orlandi, R., Page, R.D., Pakarinen, J., Patronis, N., Peura, P.J., Piselli, E., Rahkila, P., Rapisarda, E., Reiter, P., Robinson, A.P., Scheck, M., Siem, S., Singh Chakkal, K., Smith, J.F., Srebrny, J., Stefanescu, I., Tveten, G.M., Van Duppen, P., Van de Walle, J., Voulot, D., Warr, N., Wenander, F., Wiens, A., Wood, J.L., Zielinska, M., Grand Accélérateur National d'Ions Lourds (GANIL), Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Physique théorique (THEORIE), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1 (UB)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Shape coexistence, 25.70.De, 23.20.Lv, 23.20.-g, 25.60.-t, Isótopos, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Hg isotopes
Abstract

Coulomb-excitation experiments to study electromagnetic properties of radioactive even-even Hg isotopes were performed with 2.85 MeV/nucleon mercury beams from REX-ISOLDE. Magnitudes and relative signs of the reduced E2 matrix elements that couple the ground state and low-lying excited states in 182−188Hg were extracted. Information on the deformation of the ground and the first excited 0+ states was deduced using the quadrupole sum rules approach. Results show that the ground state is slightly deformed and of oblate nature, while a larger deformation for the excited 0+ state was noted in 182,184Hg. The results are compared to beyond mean field and interacting-boson based models and interpreted within a two-state mixing model. Partial agreement with the model calculations was obtained. The presence of two different structures in the light even-mass mercury isotopes that coexist at low excitation energy is firmly established., The authors would like to thank the ISOLDE facility for providing excellent beams. This work was supported by the FWO-Vlaanderen (Belgium), an FWO Pegasus Marie Curie Fellowship (L. P. G.), by GOA/2010/010 (BOF KULeuven), by the IAP Belgian Science Policy (BriX network P6/23 and P7/12), by the European Commission within the 7th Framework Programme through I3-ENSAR (Contract No. RII3-CT-2010-262010), by the U. K. Science and Technology Facilities Council, by the German BMBF under Contracts No. 06DA9036I, No. 05P12RDCIA, No. 06KY205I, No. 05P09PKCI5, No. 05P12PKFNE, No. 05P12WOFNF, and No. 09MT9156, Academy of Finland (Contract No. 131665), by the Spanish MINECO through FPA2010-17142 project and the Spanish Project No. FIS2011-28738-C02-02.

Published
2014
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30. Low-energy Coulomb excitation of Fe-62 and Mn-62 following in-beam decay of Mn-62

Author

Gaffney, L. P., Van de Walle, J., Bastin, B., Bildstein, V., Blazhev, A., Bree, N., Cederkall, J., Darby, I., De Witte, H., DiJulio, D., Diriken, J., Fedosseev, V. N., Fransen, Ch., Gernhaeuser, R., Gustafsson, A., Hess, H., Huyse, M., Kesteloot, N., Kroell, Th., Lutter, R., Marsh, B. A., Reiter, P., Seidlitz, M., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., Wimmer, K., Wrzosek-Lipska, K., Gaffney, L. P., Van de Walle, J., Bastin, B., Bildstein, V., Blazhev, A., Bree, N., Cederkall, J., Darby, I., De Witte, H., DiJulio, D., Diriken, J., Fedosseev, V. N., Fransen, Ch., Gernhaeuser, R., Gustafsson, A., Hess, H., Huyse, M., Kesteloot, N., Kroell, Th., Lutter, R., Marsh, B. A., Reiter, P., Seidlitz, M., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., Wimmer, K., and Wrzosek-Lipska, K.

Abstract

Sub-barrier Coulomb excitation was performed on a mixed beam of Mn-62 and Fe-62, following in-trap beta(-) decay of Mn-62 at REX-ISOLDE, CERN. The trapping and charge breeding times were varied in order to alter the composition of the beam, which was measured by means of an ionisation chamber at the zero-angle position of the Miniball array. A new transition was observed at 418 keV, which has been tentatively associated to a (2(+),3(+)) -> 1(g.s.)(+) transition. This fixes the relative positions of the beta-decaying 4(+) and 1(+) states in Mn-62 for the first time. Population of the 2 (+)(1) state was observed in Fe-62 and the cross-section determined by normalisation to the Ag-109 target excitation, confirming the B(E2) value measured in recoil-distance lifetime experiments.

Published
2015

31. Lifetime measurements in neutron-rich Co-63,Co-65 isotopes using the AGATA demonstrator

Author

Modamio, V., Valiente-Dobon, J. J., Lunardi, S., Lenzi, S. M., Gadea, A., Mengoni, D., Bazzacco, D., Algora, A., Bednarczyk, P., Benzoni, G., Birkenbach, B., Bracco, A., Bruyneel, B., Burger, A., Chavas, J., Corradi, L., Crespi, F. C. L., de Angelis, G., Desesquelles, P., de France, G., Depalo, R., Dewald, A., Doncel, M., Erduran, Mustafa Nizamettin, Farnea, E., Fioretto, E., Fransen, Ch., Geibel, K., Gottardo, A., Gorgen, A., Habermann, T., Hackstein, M., Hess, H., Hueyuek, T., John, P. R., Jolie, J., Judson, D., Jungclaus, A., Karkour, N., Kempley, R., Leoni, S., Melon, B., Menegazzo, R., Michelagnoli, C., Mijatovic, T., Million, B., Moeller, O., Montagnoli, G., Montanari, D., Nannini, A., Napoli, D. R., Podolyak, Zs., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Rother, W., Sahin, E., Salsac, M. D., Scarlassara, F., Sieja, K., Soderstrom, P. A., Stefanini, A. M., Stezowski, O., Szilner, S., Theisen, Ch., Travers, B., and Ur, C. A.

Subjects
Nuclear Experiment
Abstract

WOS: 000326096300003 Lifetimes of the low-lying (11/2(-)) states in Co-63,Co-65 have been measured employing the recoil distance doppler shift method (RDDS) with the AGATA gamma-ray array and the PRISMA mass spectrometer. These nuclei were populated via a multinucleon transfer reaction by bombarding a U-238 target with a beam of Ni-64. The experimental B(E2) reduced transition probabilities for Co-63,Co-65 are well reproduced by large-scale shell-model calculations that predict a constant trend of the B(E2) values up to the N = 40 Co-67 isotope. German BMBF [06 DA 9040 I]; Spanish MINECO [AIC-D-2011-0746, FPA2011-29854]; Generalitat Valenciana (Spain) [PROMETEO/2010/101]; Polish MNiSW [DPN/N190/AGATA/2009]; Science and Technology Facilities Council [ST/I506010/1, ST/F004176/1, ST/I504932/1, ST/J000051/1] The authors want to thank the partial funding of this project by the German BMBF under Contract No. 06 DA 9040 I, the Spanish MINECO under Grants No. AIC-D-2011-0746 and No. FPA2011-29854, the Generalitat Valenciana (Spain) under Grant No. PROMETEO/2010/101, and the Polish MNiSW under Grant No. DPN/N190/AGATA/2009.

Published
2013

32. Coulomb excitation of In-107

Author

DiJulio, D.D, Albers, M, Bildstein, V, Blazhev, A, Cederkall, J, Darby, I, Davinson, T, De Witte, H, Diriken, J, Ekstrom, A, Fahlander, C, Fransen, Ch, Geibel, K, Gernhauser, R, Gorgen, A, Hess, H, Heyde, K, Hjorth-Jensen, M, Iwanicki, J, Lutter, R, Reiter, P, Scheck, M, Seidlitz, M, Siem, S, Taprogge, J, Tveten, G.M, Van de Walle, J, Voulot, D, Warr, N, Wenander, F, and Wimmer, K

Subjects
Subatomic Physics, Physics::Accelerator Physics, Nuclear Experiment, SzGeCERN
Abstract

The radioactive isotope In-107 was studied using sub-barrier Coulomb excitation at the REX-ISOLDE facility at CERN. Two gamma rays were observed during the experiment, corresponding to the low-lying 11/2(+) and 3/2(-)states. The reduced transition probability of the 11/2(+) state was determined with the semiclassical Coulomb excitation code GOSIA2. The result is discussed in comparison to large-scale shell-model calculations, previous unified-model calculations, and earlier Coulomb excitation measurements in the odd-mass In isotopes. DOI: 10.1103/PhysRevC.87.017301

Published
2013

33. Lifetime measurements in neutron-rich 63, 65Co isotopes using the AGATA demonstrator

Author

Modamio, V., Valiente-Dobon, J.J., Lunardi, S., Lenzi, S.M., Gadea, A., Mengoni, D., Bazzacco, D., Algora, A., Bednarczyk, P., Benzoni, G., Birkenbach, B., Bracco, A., Bruyneel, B., Burger, A., Chavas, J., Corradi, L., Crespi, F.C.L., de Angelis, G., Desesquelles, P., de France, G., Depalo, R., Dewald, A., Doncel, M., Erduran, M.N., Farnea, E., Fioretto, E., Fransen, Ch., Geibel, K., Gottardo, A., Gorgen, A., Habermann, T., Hackstein, M., Hess, H., Huyuk, T., John, P.R., Jolie, J., Judson, D., Jungclaus, A., Karkour, N., Kempley, R., Leoni, S., Melon, B., Menegazzo, R., Michelagnoli, C., Mijatovic, Tea, Million, B., Moller, O., Montagnoli, G., Montanari, D., Nannini, A., Napoli, D.R., Podolyak, Zs., Pollarolo, G., Pullia, A., Quintana, B., Recchia, F., Reiter, P., Rosso, D., Rother, W., Sahin, E., Salsac, M.-D., Scarlassara, F., Sieja, K., Soderstrom, P.A., Stefanini, A.M., Stezowski, O., Szilner, Suzana, Theisen, Ch., Travers, B., and Ur, C.A.

Subjects
spectrometers, AGATA, life time, collectivity, Nuclear Experiment
Abstract

Lifetimes of the low-lying (11/2−) states in 63, 65Co have been measured employing the recoil distance doppler shift method (RDDS) with the AGATA gamma-ray array and the PRISMA mass spectrometer. These nuclei were populated via a multinucleon transfer reaction by bombarding a 238U target with a beam of 64Ni. The experimental B(E2) reduced transition probabilities for 63, 65Co are well reproduced by large-scale shell- model calculations that predict a constant trend of the B(E2) values up to the N = 40 (67Co) isotope.

Published
2013

34. Excitation strengths in 109Sn: Single-neutron and collective excitations near 100Sn

Author

DiJulio, D D, Cederkall, J, Fahlander, C, Ekstrom, A, Hjorth-Jensen, M, Albers, M, Bildstein, V, Blazhev, A, Darby, I, Davinson, T, De Witte, H, Diriken, J, Fransen, Ch, Geibel, K, Gernhauser, R, Gorgen, A, Hess, H, Iwanicki, J, Lutter, R, Reiter, P, Scheck, M, Seidlitz, M, Siem, S, Taprogge, J, Tveten, G M, Van de Walle, J, Voulot, D, Warr, N, Wenander, F, and Wimmer, K

Subjects
Physics::Accelerator Physics, Nuclear Physics - Experiment, Nuclear Experiment
Abstract

A set of B(E2) values for the low-lying excited states in the radioactive isotope 109Sn were deduced from a Coulomb excitation experiment. The 2.87-MeV/u radioactive beam was produced at the REX-ISOLDE facility at CERN and was incident on a secondary 58Ni target. The B(E2) values were determined using the known 2+ → 0+ reduced transition probability in 58Ni as normalization with the semi-classical Coulomb excitation code GOSIA2. The transition probabilities are compared to shell-model calculations based on a realistic nucleon-nucleon interaction and the predictions of a simple core-excitation model. This measurement represents the first determination of multiple B(E2) values in a light Sn nucleus using the Coulomb excitation technique with low-energy radioactive beams. The results provide constraints for the single-neutron states relative to 100Sn and also indicate the importance of both single-neutron and collective excitations in the light Sn isotopes. ispartof: Physical Review C, Nuclear Physics vol:86 issue:3 status: published

Published
2012

35. Excitation strengths in Sn-109: Single-neutron and collective excitations near Sn-100

Author

DiJulio, Douglas, Cederkäll, Joakim, Fahlander, Claes, Ekström, Andreas, Hjorth-Jensen, M., Albers, M., Bildstein, V., Blazhev, A., Darby, I., Davinson, T., De Witte, H., Diriken, J., Fransen, Ch., Geibel, K., Gernhaeuser, R., Gorgen, A., Hess, H., Iwanicki, J., Lutter, R., Reiter, P., Scheck, M., Seidlitz, M., Siem, S., Taprogge, J., Tveten, G. M., Van de Walle, J., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Subjects
Subatomic Physics, Physics::Accelerator Physics, Nuclear Experiment
Abstract

A set of B(E2) values for the low-lying excited states in the radioactive isotope Sn-109 were deduced from a Coulomb excitation experiment. The 2.87-MeV/u radioactive beam was produced at the REX-ISOLDE facility at CERN and was incident on a secondary Ni-58 target. The B(E2) values were determined using the known 2(+) -> 0(+) reduced transition probability in Ni-58 as normalization with the semiclassical Coulomb excitation code GOSIA2. The transition probabilities are compared to shell-model calculations based on a realistic nucleon-nucleon interaction and the predictions of a simple core-excitation model. This measurement represents the first determination of multiple B(E2) values in a light Sn nucleus using the Coulomb excitation technique with low-energy radioactive beams. The results provide constraints for the single-neutron states relative to Sn-100 and also indicate the importance of both single-neutron and collective excitations in the light Sn isotopes.

Published
2012

36. Coulomb excitation of the 3- isomer in Cu-70

Author

Rapisarda, E, Stefanescu, I, Balabanski, D L, Bastin, B, Blazhev, A, Bree, N, Danchev, M, Bruyneel, B, Davinson, T, Delahaye, P, Diriken, J, Eberth, J, Georgiev, G, Fedorov, D, Fedosseev, V N, Fiori, E, Franchoo, S, Fransen, Ch, Geibel, K, Gladnishki, K, Hadynska, K, Hess, H, Heyde, K, Huyse, M, Ivanov, O, Iwanicki, J, Jolie, J, Kalkuehler, M, Kroll, Th, Krucken, R, Koster, U, Lo Bianco, G, Lozeva, R, Marsh, B A, Nardelli, S, Nowacki, F, Patronis, N, Reiter, P, Seidlitz, M, Sieja, K, Smirnova, N, Srebrny, J, Van de Walle, J, Van Duppen, P, Warr, N, Wenander, F, Wimmer, K, Wrzosek, K, Zemlyanoi, S, and Zielinska, M

Subjects
Nuclear Physics - Experiment
Published
2011

37. Low-energy Coulomb excitation of 62Fe and 62Mn following in-beam decay of 62Mn

Author

Gaffney, L. P., primary, Van de Walle, J., additional, Bastin, B., additional, Bildstein, V., additional, Blazhev, A., additional, Bree, N., additional, Cederkäll, J., additional, Darby, I., additional, De Witte, H., additional, DiJulio, D., additional, Diriken, J., additional, Fedosseev, V. N., additional, Fransen, Ch., additional, Gernhäuser, R., additional, Gustafsson, A., additional, Hess, H., additional, Huyse, M., additional, Kesteloot, N., additional, Kröll, Th., additional, Lutter, R., additional, Marsh, B. A., additional, Reiter, P., additional, Seidlitz, M., additional, Van Duppen, P., additional, Voulot, D., additional, Warr, N., additional, Wenander, F., additional, Wimmer, K., additional, and Wrzosek-Lipska, K., additional

Published
2015
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38. Collectivity in the light radon nuclei measured directly via Coulomb excitation

Author

Gaffney, L. P., primary, Robinson, A. P., additional, Jenkins, D. G., additional, Andreyev, A. N., additional, Bender, M., additional, Blazhev, A., additional, Bree, N., additional, Bruyneel, B., additional, Butler, P. A., additional, Cocolios, T. E., additional, Davinson, T., additional, Deacon, A. N., additional, De Witte, H., additional, DiJulio, D., additional, Diriken, J., additional, Ekström, A., additional, Fransen, Ch., additional, Freeman, S. J., additional, Geibel, K., additional, Grahn, T., additional, Hadinia, B., additional, Hass, M., additional, Heenen, P.-H., additional, Hess, H., additional, Huyse, M., additional, Jakobsson, U., additional, Kesteloot, N., additional, Konki, J., additional, Kröll, Th., additional, Kumar, V., additional, Ivanov, O., additional, Martin-Haugh, S., additional, Mücher, D., additional, Orlandi, R., additional, Pakarinen, J., additional, Petts, A., additional, Peura, P., additional, Rahkila, P., additional, Reiter, P., additional, Scheck, M., additional, Seidlitz, M., additional, Singh, K., additional, Smith, J. F., additional, Van de Walle, J., additional, Van Duppen, P., additional, Voulot, D., additional, Wadsworth, R., additional, Warr, N., additional, Wenander, F., additional, Wimmer, K., additional, Wrzosek-Lipska, K., additional, and Zielińska, M., additional

Published
2015
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39. Experimental study of theNi66(d,p) Ni67one-neutron transfer reaction

Author

Diriken, J., primary, Patronis, N., additional, Andreyev, A., additional, Antalic, S., additional, Bildstein, V., additional, Blazhev, A., additional, Darby, I. G., additional, De Witte, H., additional, Eberth, J., additional, Elseviers, J., additional, Fedosseev, V. N., additional, Flavigny, F., additional, Fransen, Ch., additional, Georgiev, G., additional, Gernhauser, R., additional, Hess, H., additional, Huyse, M., additional, Jolie, J., additional, Kröll, Th., additional, Krücken, R., additional, Lutter, R., additional, Marsh, B. A., additional, Mertzimekis, T., additional, Muecher, D., additional, Orlandi, R., additional, Pakou, A., additional, Raabe, R., additional, Randisi, G., additional, Reiter, P., additional, Roger, T., additional, Seidlitz, M., additional, Seliverstov, M., additional, Sotty, C., additional, Tornqvist, H., additional, Van De Walle, J., additional, Van Duppen, P., additional, Voulot, D., additional, Warr, N., additional, Wenander, F., additional, and Wimmer, K., additional

Published
2015
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40. Evolution ofE2transition strength in deformed hafnium isotopes from new measurements onHf172,Hf174, andHf176

Author

Rudigier, M., primary, Nomura, K., additional, Dannhoff, M., additional, Gerst, R-B., additional, Jolie, J., additional, Saed-Samii, N., additional, Stegemann, S., additional, Régis, J-M., additional, Robledo, L. M., additional, Rodríguez-Guzmán, R., additional, Blazhev, A., additional, Fransen, Ch., additional, Warr, N., additional, and Zell, K. O., additional

Published
2015
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41. Coulomb excitation of neutron-rich Cd isotopes

Author

Ilieva, S., Thuerauf, M., Kroell, Th., Kruecken, R., Behrens, T., Bildstein, V., Blazhev, A., Boenig, S., Butler, P. A., Cederkaell, J., Davinson, T., Delahaye, P., Diriken, J., Ekstroem, A., Finke, F., Fraile, L. M., Franchoo, S., Fransen, Ch., Georgiev, G., Gernhaeuser, R., Habs, D., Hess, H., Hurst, A. M., Huyse, M., Ivanov, O., Iwanicki, J., Kent, P., Kester, O., Koester, U., Lutter, R., Mahgoub, M., Martin, D., Mayet, P., Maierbeck, P., Morgan, T., Niedermeier, O., Pantea, M., Reiter, P., Rodriguez, T. R., Rolke, Th., Scheit, H., Scherillo, A., Schwalm, D., Seidlitz, M., Sieber, T., Simpson, G. S., Stefanescu, I., Thiel, S., Thirolf, P. G., Van de Walle, J., Van Duppen, P., Voulot, D., Warr, N., Weinzierl, W., Weisshaar, D., Wenander, F., Wiens, A., Winkler, S., Ilieva, S., Thuerauf, M., Kroell, Th., Kruecken, R., Behrens, T., Bildstein, V., Blazhev, A., Boenig, S., Butler, P. A., Cederkaell, J., Davinson, T., Delahaye, P., Diriken, J., Ekstroem, A., Finke, F., Fraile, L. M., Franchoo, S., Fransen, Ch., Georgiev, G., Gernhaeuser, R., Habs, D., Hess, H., Hurst, A. M., Huyse, M., Ivanov, O., Iwanicki, J., Kent, P., Kester, O., Koester, U., Lutter, R., Mahgoub, M., Martin, D., Mayet, P., Maierbeck, P., Morgan, T., Niedermeier, O., Pantea, M., Reiter, P., Rodriguez, T. R., Rolke, Th., Scheit, H., Scherillo, A., Schwalm, D., Seidlitz, M., Sieber, T., Simpson, G. S., Stefanescu, I., Thiel, S., Thirolf, P. G., Van de Walle, J., Van Duppen, P., Voulot, D., Warr, N., Weinzierl, W., Weisshaar, D., Wenander, F., Wiens, A., and Winkler, S.

Abstract

The isotopes (122),(124),Cd-126 were studied in a safe Coulomb-excitation experiment at the radioactive ion-beam facility REX-ISOLDE at CERN. The reduced transition probabilities B(E2; 0(g. s)(vertical bar) -> 2(1)(+)) and limits for the quadrupole moments of the first 2(+) excited states in the three isotopes were determined. The onset of collectivity in the vicinity of the Z = 50 and N = 82 shell closures is discussed by comparison with shell model and beyond mean-field calculations.

Published
2014

42. Study of the deformation-driving nu d(5/2) orbital in Ni-67(28)39 using one-neutron transfer reactions

Author

Diriken, J., Patronis, N., Andreyev, A. N., Antalic, S., Bildstein, V., Blazhev, A., Darby, I. G., De Witte, H., Eberth, J., Elseviers, J., Fedosseev, V. N., Flavigny, F., Fransen, Ch., Georgiev, G., Gernhauser, R., Hess, H., Huyse, M., Jolie, J., Kroell, Th., Kruecken, R., Lutter, R., Marsh, B. A., Mertzimekis, T., Muecher, D., Nowacki, F., Orlandi, R., Pakou, A., Raabe, R., Randisi, G., Reiter, P., Roger, T., Seidlitz, M., Seliverstov, M., Sieja, K., Sotty, C., Tornqvist, H., De Walle, J. Van, Van Duppen, P., Voulot, D., Warr, N., Wenander, F., Wimmer, K., Diriken, J., Patronis, N., Andreyev, A. N., Antalic, S., Bildstein, V., Blazhev, A., Darby, I. G., De Witte, H., Eberth, J., Elseviers, J., Fedosseev, V. N., Flavigny, F., Fransen, Ch., Georgiev, G., Gernhauser, R., Hess, H., Huyse, M., Jolie, J., Kroell, Th., Kruecken, R., Lutter, R., Marsh, B. A., Mertzimekis, T., Muecher, D., Nowacki, F., Orlandi, R., Pakou, A., Raabe, R., Randisi, G., Reiter, P., Roger, T., Seidlitz, M., Seliverstov, M., Sieja, K., Sotty, C., Tornqvist, H., De Walle, J. Van, Van Duppen, P., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Abstract

The nu g(9/2), d(5/2), s(1/2) orbitals are assumed to be responsible for the swift onset of collectivity observed in the region below Ni-68. Especially the single-particle energies and strengths of these orbitals are of importance. We studied such properties in the nearby Ni-67 nucleus, by performing a (d, p)-experiment in inverse kinematics employing a post-accelerated radioactive ion beam (RIB) at the REX-ISOLDE facility. The experiment was performed at an energy of 2.95 MeV/u using a combination of the T-REX particle detectors, the Miniball gamma-detection array and a newly-developed delayed-correlation technique as to investigate mu s-isomers. Angular distributions of the ground state and multiple excited states in 67Ni were obtained and compared with DWBA cross-section calculations, leading to the identification of positive-parity states with substantial nu g(9/2) (1007keV) and nu d(5/2) (2207 keV and 3277 keV) single-particle strengths up to an excitation energy of 5.8 MeV. 50% of the nu d(5/2) single-particle strength relative to the nu g(9/2)-orbital is concentrated in and shared between the first two observed 5/2(+) levels. A comparison with extended Shell Model calculations and equivalent (He-3, d) studies in the region around Zr-90(40)50 highlights similarities for the strength of the negative-parity pf and positive-parity g(9/2) state, but differences are observed for the d(5/2) single-particle strength. (C) 2014 The Authors. Published by Elsevier B.V.

Published
2014

43. Study of the deformation-drivingνd5/2orbital in 67 28 Ni 39 using one-neutron transfer reactions

Author

Diriken, J., primary, Patronis, N., additional, Andreyev, A.N., additional, Antalic, S., additional, Bildstein, V., additional, Blazhev, A., additional, Darby, I.G., additional, De Witte, H., additional, Eberth, J., additional, Elseviers, J., additional, Fedosseev, V.N., additional, Flavigny, F., additional, Fransen, Ch., additional, Georgiev, G., additional, Gernhauser, R., additional, Hess, H., additional, Huyse, M., additional, Jolie, J., additional, Kröll, Th., additional, Krücken, R., additional, Lutter, R., additional, Marsh, B.A., additional, Mertzimekis, T., additional, Muecher, D., additional, Nowacki, F., additional, Orlandi, R., additional, Pakou, A., additional, Raabe, R., additional, Randisi, G., additional, Reiter, P., additional, Roger, T., additional, Seidlitz, M., additional, Seliverstov, M., additional, Sieja, K., additional, Sotty, C., additional, Tornqvist, H., additional, Van De Walle, J., additional, Van Duppen, P., additional, Voulot, D., additional, Warr, N., additional, Wenander, F., additional, and Wimmer, K., additional

Published
2014
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44. Shape Coexistence in the Neutron-Deficient Even-EvenHg182−188Isotopes Studied via Coulomb Excitation

Author

Bree, N., primary, Wrzosek-Lipska, K., additional, Petts, A., additional, Andreyev, A., additional, Bastin, B., additional, Bender, M., additional, Blazhev, A., additional, Bruyneel, B., additional, Butler, P. A., additional, Butterworth, J., additional, Carpenter, M. P., additional, Cederkäll, J., additional, Clément, E., additional, Cocolios, T. E., additional, Deacon, A., additional, Diriken, J., additional, Ekström, A., additional, Fitzpatrick, C., additional, Fraile, L. M., additional, Fransen, Ch., additional, Freeman, S. J., additional, Gaffney, L. P., additional, García-Ramos, J. E., additional, Geibel, K., additional, Gernhäuser, R., additional, Grahn, T., additional, Guttormsen, M., additional, Hadinia, B., additional, Hadyńska-Kle¸k, K., additional, Hass, M., additional, Heenen, P.-H., additional, Herzberg, R.-D., additional, Hess, H., additional, Heyde, K., additional, Huyse, M., additional, Ivanov, O., additional, Jenkins, D. G., additional, Julin, R., additional, Kesteloot, N., additional, Kröll, Th., additional, Krücken, R., additional, Larsen, A. C., additional, Lutter, R., additional, Marley, P., additional, Napiorkowski, P. J., additional, Orlandi, R., additional, Page, R. D., additional, Pakarinen, J., additional, Patronis, N., additional, Peura, P. J., additional, Piselli, E., additional, Rahkila, P., additional, Rapisarda, E., additional, Reiter, P., additional, Robinson, A. P., additional, Scheck, M., additional, Siem, S., additional, Singh Chakkal, K., additional, Smith, J. F., additional, Srebrny, J., additional, Stefanescu, I., additional, Tveten, G. M., additional, Van Duppen, P., additional, Van de Walle, J., additional, Voulot, D., additional, Warr, N., additional, Wenander, F., additional, Wiens, A., additional, Wood, J. L., additional, and Zielińska, M., additional

Published
2014
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45. Coulomb excitation of neutron-rich Cd isotopes

Author

Ilieva, S., primary, Thürauf, M., additional, Kröll, Th., additional, Krücken, R., additional, Behrens, T., additional, Bildstein, V., additional, Blazhev, A., additional, Bönig, S., additional, Butler, P. A., additional, Cederkäll, J., additional, Davinson, T., additional, Delahaye, P., additional, Diriken, J., additional, Ekström, A., additional, Finke, F., additional, Fraile, L. M., additional, Franchoo, S., additional, Fransen, Ch., additional, Georgiev, G., additional, Gernhäuser, R., additional, Habs, D., additional, Hess, H., additional, Hurst, A. M., additional, Huyse, M., additional, Ivanov, O., additional, Iwanicki, J., additional, Kent, P., additional, Kester, O., additional, Köster, U., additional, Lutter, R., additional, Mahgoub, M., additional, Martin, D., additional, Mayet, P., additional, Maierbeck, P., additional, Morgan, T., additional, Niedermeier, O., additional, Pantea, M., additional, Reiter, P., additional, Rodríguez, T. R., additional, Rolke, Th., additional, Scheit, H., additional, Scherillo, A., additional, Schwalm, D., additional, Seidlitz, M., additional, Sieber, T., additional, Simpson, G. S., additional, Stefanescu, I., additional, Thiel, S., additional, Thirolf, P. G., additional, Van de Walle, J., additional, Van Duppen, P., additional, Voulot, D., additional, Warr, N., additional, Weinzierl, W., additional, Weisshaar, D., additional, Wenander, F., additional, Wiens, A., additional, and Winkler, S., additional

Published
2014
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46. Coulomb excitation of In-107

Author

DiJulio, Douglas, Cederkäll, Joakim, Fahlander, Claes, Ekström, Andreas, Hjorth-Jensen, M., Albers, M., Bildstein, V., Blazhev, A., Darby, I., Davinson, T., De Witte, H., Diriken, J., Fransen, Ch., Geibel, K., Gernhaeuser, R., Gorgen, A., Hess, H., Heyde, K., Iwanicki, J., Lutter, R., Reiter, P., Scheck, M., Seidlitz, M., Siem, S., Taprogge, J., Tveten, G. M., Van de Walle, J., Voulot, D., Warr, N., Wenander, F., Wimmer, K., DiJulio, Douglas, Cederkäll, Joakim, Fahlander, Claes, Ekström, Andreas, Hjorth-Jensen, M., Albers, M., Bildstein, V., Blazhev, A., Darby, I., Davinson, T., De Witte, H., Diriken, J., Fransen, Ch., Geibel, K., Gernhaeuser, R., Gorgen, A., Hess, H., Heyde, K., Iwanicki, J., Lutter, R., Reiter, P., Scheck, M., Seidlitz, M., Siem, S., Taprogge, J., Tveten, G. M., Van de Walle, J., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Abstract

The radioactive isotope In-107 was studied using sub-barrier Coulomb excitation at the REX-ISOLDE facility at CERN. Two gamma rays were observed during the experiment, corresponding to the low-lying 11/2(+) and 3/2(-)states. The reduced transition probability of the 11/2(+) state was determined with the semiclassical Coulomb excitation code GOSIA2. The result is discussed in comparison to large-scale shell-model calculations, previous unified-model calculations, and earlier Coulomb excitation measurements in the odd-mass In isotopes. DOI: 10.1103/PhysRevC.87.017301

Published
2013

47. Excitation strengths in Sn-109: Single-neutron and collective excitations near Sn-100

Author

DiJulio, D. D., Cederkall, J., Fahlander, C., Ekstrom, A., Hjorth-Jensen, M., Albers, M., Bildstein, V., Blazhev, A., Darby, I., Davinson, T., De Witte, H., Diriken, J., Fransen, Ch., Geibel, K., Gernhaeuser, R., Gorgen, A., Hess, H., Iwanicki, J., Lutter, R., Reiter, P., Scheck, M., Seidlitz, M., Siem, S., Taprogge, J., Tveten, G. M., Van de Walle, J., Voulot, D., Warr, N., Wenander, F., Wimmer, K., DiJulio, D. D., Cederkall, J., Fahlander, C., Ekstrom, A., Hjorth-Jensen, M., Albers, M., Bildstein, V., Blazhev, A., Darby, I., Davinson, T., De Witte, H., Diriken, J., Fransen, Ch., Geibel, K., Gernhaeuser, R., Gorgen, A., Hess, H., Iwanicki, J., Lutter, R., Reiter, P., Scheck, M., Seidlitz, M., Siem, S., Taprogge, J., Tveten, G. M., Van de Walle, J., Voulot, D., Warr, N., Wenander, F., and Wimmer, K.

Abstract

A set of B(E2) values for the low-lying excited states in the radioactive isotope Sn-109 were deduced from a Coulomb excitation experiment. The 2.87-MeV/u radioactive beam was produced at the REX-ISOLDE facility at CERN and was incident on a secondary Ni-58 target. The B(E2) values were determined using the known 2(+) -> 0(+) reduced transition probability in Ni-58 as normalization with the semiclassical Coulomb excitation code GOSIA2. The transition probabilities are compared to shell-model calculations based on a realistic nucleon-nucleon interaction and the predictions of a simple core-excitation model. This measurement represents the first determination of multiple B(E2) values in a light Sn nucleus using the Coulomb excitation technique with low-energy radioactive beams. The results provide constraints for the single-neutron states relative to Sn-100 and also indicate the importance of both single-neutron and collective excitations in the light Sn isotopes.

Published
2012

48. Coulomb excitation of the 3(-) isomer in Cu-70

Author

Rapisarda, E., Stefanescu, I., Balabanski, D. L., Bastin, B., Blazhev, A., Bree, N., Danchev, M., Bruyneel, B., Davinson, T., Delahaye, P., Diriken, J., Eberth, J., Georgiev, G., Fedorov, D., Fedosseev, V. N., Fiori, E., Franchoo, S., Fransen, Ch, Geibel, K., Gladnishki, K., Hadynska, K., Hess, H., Heyde, K., Huyse, M., Ivanov, O., Iwanicki, J., Jolie, J., Kalkuehler, M., Kroell, Th, Kruecken, R., Koester, U., Lo Bianco, G., Lozeva, R., Marsh, B. A., Nardelli, S., Nowacki, F., Patronis, N., Reiter, P., Seidlitz, M., Sieja, K., Smirnova, N., Srebrny, J., Van de Walle, J., Van Duppen, P., Warr, N., Wenander, F., Wimmer, K., Wrzosek, K., Zemlyanoi, S., Zielinska, M., Rapisarda, E., Stefanescu, I., Balabanski, D. L., Bastin, B., Blazhev, A., Bree, N., Danchev, M., Bruyneel, B., Davinson, T., Delahaye, P., Diriken, J., Eberth, J., Georgiev, G., Fedorov, D., Fedosseev, V. N., Fiori, E., Franchoo, S., Fransen, Ch, Geibel, K., Gladnishki, K., Hadynska, K., Hess, H., Heyde, K., Huyse, M., Ivanov, O., Iwanicki, J., Jolie, J., Kalkuehler, M., Kroell, Th, Kruecken, R., Koester, U., Lo Bianco, G., Lozeva, R., Marsh, B. A., Nardelli, S., Nowacki, F., Patronis, N., Reiter, P., Seidlitz, M., Sieja, K., Smirnova, N., Srebrny, J., Van de Walle, J., Van Duppen, P., Warr, N., Wenander, F., Wimmer, K., Wrzosek, K., Zemlyanoi, S., and Zielinska, M.

Abstract

Post-accelerated isomerically purified radioactive beams, available at the CERN On-Line Isotope Mass Separator facility using the resonant ionization laser technique, have been used to study the Coulomb excitation of the I-pi = 3(-) state in Cu-70 (Z = 29, N = 41). While first results using a I-pi = 6(-) beam were reported previously, the present complementary experiment allows us to complete the study of the multiplet of states (3(-), 4(-), 5(-), 6(-)) arising from the pi 2p(3)/(2)nu 1g(9/2) configuration. Besides the known gamma-ray transition deexciting the 4(-) state, a ground-state. ray of 511(3) keV was observed for the first time and was unambiguously associated with the 5(-) state deexcitation. This observation fixes the energy, spin, and parity of this state, completing the low-energy level scheme of Cu-70. B(E2) values for all possible E2 transitions within the multiplet were determined. A comparison with large-scale shell model calculations using different interactions and valence spaces shows the importance of proton excitation across the Z = 28 shell gap and the role of the 2d(5/2) neutron orbital.

Published
2011

49. Lifetime measurements in neutron-rich63,65Co isotopes using the AGATA demonstrator

Author

Modamio, V., primary, Valiente-Dobón, J. J., additional, Lunardi, S., additional, Lenzi, S. M., additional, Gadea, A., additional, Mengoni, D., additional, Bazzacco, D., additional, Algora, A., additional, Bednarczyk, P., additional, Benzoni, G., additional, Birkenbach, B., additional, Bracco, A., additional, Bruyneel, B., additional, Bürger, A., additional, Chavas, J., additional, Corradi, L., additional, Crespi, F. C. L., additional, de Angelis, G., additional, Désesquelles, P., additional, de France, G., additional, Depalo, R., additional, Dewald, A., additional, Doncel, M., additional, Erduran, M. N., additional, Farnea, E., additional, Fioretto, E., additional, Fransen, Ch., additional, Geibel, K., additional, Gottardo, A., additional, Görgen, A., additional, Habermann, T., additional, Hackstein, M., additional, Hess, H., additional, Hüyük, T., additional, John, P. R., additional, Jolie, J., additional, Judson, D., additional, Jungclaus, A., additional, Karkour, N., additional, Kempley, R., additional, Leoni, S., additional, Melon, B., additional, Menegazzo, R., additional, Michelagnoli, C., additional, Mijatović, T., additional, Million, B., additional, Möller, O., additional, Montagnoli, G., additional, Montanari, D., additional, Nannini, A., additional, Napoli, D. R., additional, Podolyak, Zs., additional, Pollarolo, G., additional, Pullia, A., additional, Quintana, B., additional, Recchia, F., additional, Reiter, P., additional, Rosso, D., additional, Rother, W., additional, Sahin, E., additional, Salsac, M. D., additional, Scarlassara, F., additional, Sieja, K., additional, Söderström, P. A., additional, Stefanini, A. M., additional, Stezowski, O., additional, Szilner, S., additional, Theisen, Ch., additional, Travers, B., additional, and Ur, C. A., additional

Published
2013
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50. New instrumentation for precise (n,γ) measurements at ILL Grenoble

Author

Urban, W, primary, Jentschel, M, additional, Märkisch, B, additional, Materna, Th, additional, Bernards, Ch, additional, Drescher, C, additional, Fransen, Ch, additional, Jolie, J, additional, Köster, U, additional, Mutti, P, additional, Rza̧ca-Urban, T, additional, and Simpson, G S, additional

Published
2013
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