11 results on '"M. Doncel"'
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2. Evidence of Partial Seniority Conservation in the πg9/2 Shell for the N=50 Isotones
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R. M. Pérez-Vidal, A. Gadea, C. Domingo-Pardo, A. Gargano, J. J. Valiente-Dobón, E. Clément, A. Lemasson, L. Coraggio, M. Siciliano, S. Szilner, M. Bast, T. Braunroth, J. Collado, A. Corina, A. Dewald, M. Doncel, J. Dudouet, G. de France, C. Fransen, V. González, T. Hüyük, B. Jacquot, P. R. John, A. Jungclaus, Y. H. Kim, A. Korichi, M. Labiche, S. Lenzi, H. Li, J. Ljungvall, A. López-Martens, D. Mengoni, C. Michelagnoli, C. Müller-Gatermann, D. R. Napoli, A. Navin, B. Quintana, D. Ramos, M. Rejmund, E. Sanchis, J. Simpson, O. Stezowski, D. Wilmsen, M. Zielińska, A. J. Boston, D. Barrientos, P. Bednarczyk, G. Benzoni, B. Birkenbach, H. C. Boston, A. Bracco, B. Cederwall, D. M. Cullen, F. Didierjean, J. Eberth, A. Gottardo, J. Goupil, L. J. Harkness-Brennan, H. Hess, D. S. Judson, A. Kaşkaş, W. Korten, S. Leoni, R. Menegazzo, B. Million, J. Nyberg, Zs. Podolyak, A. Pullia, D. Ralet, F. Recchia, P. Reiter, K. Rezynkina, M. D. Salsac, M. Şenyiğit, D. Sohler, Ch. Theisen, and D. Verney
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General Physics and Astronomy - Published
- 2022
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3. Lifetime measurements of states of S35 , S36 , S37 , and S38 using the AGATA γ -ray tracking spectrometer
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L. Grocutt, R. Chapman, M. Bouhelal, F. Haas, A. Goasduff, J. F. Smith, R. S. Lubna, S. Courtin, D. Bazzacco, T. Braunroth, L. Capponi, L. Corradi, X. Derkx, P. Desesquelles, M. Doncel, E. Fioretto, A. Gottardo, V. Liberati, B. Melon, D. Mengoni, C. Michelagnoli, T. Mijatović, V. Modamio, G. Montagnoli, D. Montanari, K. F. Mulholland, D. R. Napoli, C. M. Petrache, A. Pipidis, F. Recchia, E. Sahin, P. P. Singh, A. M. Stefanini, S. Szilner, and J. J. Valiente-Dobón
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- 2022
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4. Lifetime measurements in the even-even Cd102–108 isotopes
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M. Siciliano, J. J. Valiente-Dobón, A. Goasduff, T. R. Rodríguez, D. Bazzacco, G. Benzoni, T. Braunroth, N. Cieplicka-Oryńczak, E. Clément, F. C. L. Crespi, G. de France, M. Doncel, S. Ertürk, C. Fransen, A. Gadea, G. Georgiev, A. Goldkuhle, U. Jakobsson, G. Jaworski, P. R. John, I. Kuti, A. Lemasson, H. Li, A. Lopez-Martens, T. Marchi, D. Mengoni, C. Michelagnoli, T. Mijatović, C. Müller-Gatermann, D. R. Napoli, J. Nyberg, M. Palacz, R. M. Pérez-Vidal, B. Sayği, D. Sohler, S. Szilner, and D. Testov
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Physics ,Nuclear physics ,Nuclear interaction ,medicine.anatomical_structure ,Isotope ,010308 nuclear & particles physics ,Nuclear Theory ,0103 physical sciences ,medicine ,Nuclear Experiment ,010306 general physics ,01 natural sciences ,Nucleus - Abstract
Background: The heaviest T-z = 0 doubly-magic nucleus, Sn-100, and the neighboring nuclei offer unique opportunities to investigate the properties of nuclear interaction. For instance, the structur ...
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- 2021
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5. Evidence for enhanced neutron-proton correlations from the level structure of the N=Z+1 nucleus Tc444387
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X. Liu, B. Cederwall, C. Qi, R. A. Wyss, Ö. Aktas, A. Ertoprak, W. Zhang, E. Clément, G. de France, D. Ralet, A. Gadea, A. Goasduff, G. Jaworski, I. Kuti, B. M. Nyakó, J. Nyberg, M. Palacz, R. Wadsworth, J. J. Valiente-Dobón, H. Al-Azri, A. Ataç Nyberg, T. Bäck, G. de Angelis, M. Doncel, J. Dudouet, A. Gottardo, M. Jurado, J. Ljungvall, D. Mengoni, D. R. Napoli, C. M. Petrache, D. Sohler, J. Timár, D. Barrientos, P. Bednarczyk, G. Benzoni, B. Birkenbach, A. J. Boston, H. C. Boston, I. Burrows, L. Charles, M. Ciemala, F. C. L. Crespi, D. M. Cullen, P. Désesquelles, C. Domingo-Pardo, J. Eberth, N. Erduran, S. Ertürk, V. González, J. Goupil, H. Hess, T. Huyuk, A. Jungclaus, W. Korten, A. Lemasson, S. Leoni, A. Maj, R. Menegazzo, B. Million, R. M. Perez-Vidal, Zs. Podolyàk, A. Pullia, F. Recchia, P. Reiter, F. Saillant, M. D. Salsac, E. Sanchis, J. Simpson, O. Stezowski, C. Theisen, and M. Zielińska
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Physics ,Proton ,Spectrometer ,010308 nuclear & particles physics ,Isoscalar ,Nuclear Theory ,01 natural sciences ,Charged particle ,Excited state ,0103 physical sciences ,Level structure ,Neutron ,AGATA ,Atomic physics ,Nuclear Experiment ,010306 general physics - Abstract
The low-lying excited states in the neutron-deficient $N = Z + 1$ nucleus $^{87}_{43}$Tc$_{44}$ have been studied via the fusion-evaporation reaction $^{54}$Fe $(^{36}Ar, 2n1p)$ $^{87}$Tc at the Grand Accelerateur National d'Ions Lourds (GANIL), France. The AGATA spectrometer was used in conjunction with the auxiliary NEDA, Neutron Wall, and DIAMANT detector arrays to measure coincident prompt γ rays, neutrons, and charged particles emitted in the reaction. A level scheme of $^{87}$Tc from the $(9/2^+_{g.s})$ state to the $( 33 / 2^+_1$) state was established based on six mutually coincident γ -ray transitions. The constructed level structure exhibits a rotational behavior with a sharp backbending at $ℏω ≈ 0.50$ MeV. A decrease in alignment frequency and increase in alignment sharpness in the odd-mass isotonic chains around $N=44$ is proposed as an effect of the enhanced isoscalar neutron-proton interactions in odd-mass nuclei when approaching the $N=Z$ line.
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- 2021
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6. Isospin Properties of Nuclear Pair Correlations from the Level Structure of the Self-Conjugate Nucleus Ru88
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Eric Clément, B. Birkenbach, M. Zielińska, B. Million, M. Doncel, C. Domingo-Pardo, F. Recchia, J. Ljungvall, R. M. Perez-Vidal, Torbjörn Bäck, P. Reiter, P. Bednarczyk, J. Simpson, D. Mengoni, J. J. Valiente-Dobón, A. Lemasson, W. Korten, W. Zhang, X. Liu, B. M. Nyako, A. J. Boston, J. Goupil, H. Al-Azri, Diego Barrientos, M. D. Salsac, F. C. L. Crespi, A. Jungclaus, A. Gadea, A. Maj, N. Erduran, P. Désesquelles, A. Gottardo, Ch. Theisen, T. Hüyük, János Timár, Alberto Pullia, Vicente González, L. Charles, Zs. Podolyák, R. Menegazzo, C. M. Petrache, D. M. Cullen, S. Erturk, A. Ataç Nyberg, M. Jurado, Herbert Hess, Chong Qi, O. Aktas, Bo Cederwall, István Kuti, D. R. Napoli, Johan Nyberg, Alain Goasduff, D. Ralet, Enrique Sanchis, A. Ertoprak, M. Palacz, F. Saillant, D. Sohler, O. Stezowski, R. Wadsworth, J. Dudouet, G. de Angelis, M. Ciemala, G. Jaworski, J. Eberth, H. C. Boston, G. Benzoni, I. Burrows, and S. Leoni
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Physics ,Isovector ,Isoscalar ,Nuclear Theory ,General Physics and Astronomy ,01 natural sciences ,Charged particle ,Nuclear physics ,13. Climate action ,Isospin ,Excited state ,0103 physical sciences ,Neutron detection ,AGATA ,Neutron ,Nuclear Experiment ,010306 general physics - Abstract
The low-lying energy spectrum of the extremely neutron-deficient self-conjugate (N = Z) nuclide 88 44Ru44 has been measured using the combination of the Advanced Gamma Tracking Array (AGATA) spectrometer, the NEDA and Neutron Wall neutron detector arrays, and the DIAMANT charged particle detector array. Excited states in 88Ru were populated via the 54Fe(36Ar; 2n )88Ru fusion-evaporation reaction at the Grand Acc�el�erateur National d'Ions Lourds (GANIL) accelerator complex. The observed -ray cascade is assigned to 88Ru using clean prompt - -2-neutron coincidences in anti-coincidence with the detection of charged particles, con�rming and extending the previously assigned sequence of low-lying excited states. It is consistent with a moderately deformed rotating system exhibiting a band crossing at a rotational frequency that is significantly higher than standard theoretical predictions with isovector pairing, as well as observations in neighboring N > Z nuclides. The direct observation of such a \delayed" rotational alignment in a deformed N = Z nucleus is in agreement with theoretical predictions related to the presence of strong isoscalar neutron-proton pair correlations.
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- 2020
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7. Lifetime Measurements of Excited States in Pt172 and the Variation of Quadrupole Transition Strength with Angular Momentum
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H. Liu, Philippos Papadakis, Catherine Scholey, J. J. Valiente-Dobón, Rauno Julin, Joshua Hilton, Thomas Braunroth, D. Hodge, Juha Sorri, M. Doncel, S. Matta, Panu Ruotsalainen, Roberto Liotta, A. Ertoprak, D. M. Cullen, M. M. Giles, Daniel Cox, M. Kumar Raju, Panu Rahkila, C. M. Petrache, Sanna Stolze, H. J. Li, Tom Calverley, Jari Partanen, Tuomas Grahn, Janne Pakarinen, V. Modamio, Matthew J. Taylor, Juha Uusitalo, Sakari Juutinen, O. Aktas, Bo Cederwall, Eiji Ideguchi, Jan Sarén, Paul Greenlees, Chong Qi, H. Badran, Mikael Sandzelius, P. Subramaniam, and Y. D. Fang
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Physics ,Quantum phase transition ,Angular momentum ,010308 nuclear & particles physics ,General Physics and Astronomy ,01 natural sciences ,Excited state ,Neutron number ,0103 physical sciences ,Quadrupole ,Nuclear fusion ,Neutron ,Interacting boson model ,Atomic physics ,010306 general physics - Abstract
Lifetimes of the first excited 2(+) and 4(+) states in the extremely neutron -deficient nuclide Pt-172 have been measured for the first time using the recoil-distance Doppler shift and recoil-decay tagging techniques. An unusually low value of the ratio B(E2: 4(1)(+) -> 2(1)(+)/B(E2: 2(1)(+) -> 0(gs)(+)) = 0.55(19) was found, similar to a handful of other such anomalous cases observed in the entire Segre chart. The observation adds to a cluster of a few extremely neutron -deficient nuclides of the heavy transition metals with neutron numbers N approximate to 90-94 featuring the effect. No theoretical model calculations reported to date have been able to explain the anomalously low B(E2: 4(1)(+) -> 2(1)(+)/B(E2: 2(1)(+) -> 0(gs)(+)) ratios observed in these cases. Such low values cannot, e.g., be explained within the framework of the geometrical collective model or by algebraic approaches within the interacting boson model framework. It is proposed that the group of B(E2: 4(1)(+) -> 2(1)(+)/B(E2: 2(1)(+) -> 0(gs)(+)) ratios in the extremely neutron-deficient even-even W, Os, and Pt nuclei around neutron numbers N approximate to 90-94 reveal a quantum phase transition from a seniority-conserving structure to a collective regime as a function of neutron number. Although a system governed by seniority symmetry is the only theoretical framework for which such an effect may naturally occur, the phenomenon is highly unexpected for these nuclei that are not situated near closed shells.
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- 2018
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8. Lifetime measurements of excited states in W162 and W164 and the evolution of collectivity in rare-earth nuclei
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Sakari Juutinen, Rauno Julin, D. T. Joss, T. Kröll, Michael Taylor, Ulrika Jakobsson, Robert Page, S. Bönig, Jan Sarén, Mikael Sandzelius, H. W. Li, David O'Donnell, Kalle Auranen, Matti Leino, Joonas Konki, Pauli Peura, Bo Cederwall, Andrej Herzan, Paul Greenlees, C. McPeake, B. Saygi, Chong Qi, M. Doncel, Juha Sorri, Michael Drummond, Panu Rahkila, Jari Partanen, Janne Pakarinen, Catherine Scholey, A. Thornthwaite, Tuomas Grahn, Juha Uusitalo, Sanna Stolze, and Panu Ruotsalainen
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Physics ,Rare earth nuclei ,010308 nuclear & particles physics ,Nuclear Theory ,7. Clean energy ,01 natural sciences ,Nuclear physics ,symbols.namesake ,Recoil ,Excited state ,0103 physical sciences ,symbols ,Neutron ,Atomic physics ,Nuclear Experiment ,010306 general physics ,Doppler effect - Abstract
Lifetimes of the first excited 2(+) states in the extremely neutron- deficient W-162 and W-164 nuclei have been measured using the recoil distance Doppler shift technique. Experimental B(E2) data f ...
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- 2017
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9. Shell evolution beyondN=40:Cu69,71,73
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E. Sahin, M. Doncel, K. Sieja, G. de Angelis, A. Gadea, B. Quintana, A. Görgen, V. Modamio, D. Mengoni, J. J. Valiente-Dobón, P. R. John, M. Albers, D. Bazzacco, G. Benzoni, B. Birkenbach, B. Cederwall, E. Clément, D. Curien, L. Corradi, P. Désesquelles, A. Dewald, F. Didierjean, G. Duchêne, J. Eberth, M. N. Erduran, E. Farnea, E. Fioretto, G. de France, C. Fransen, R. Gernhäuser, A. Gottardo, M. Hackstein, T. Hagen, A. Hernández-Prieto, H. Hess, T. Hüyük, A. Jungclaus, S. Klupp, W. Korten, A. Kusoglu, S. M. Lenzi, J. Ljungvall, C. Louchart, S. Lunardi, R. Menegazzo, C. Michelagnoli, T. Mijatović, B. Million, P. Molini, G. Montagnoli, D. Montanari, O. Möller, D. R. Napoli, A. Obertelli, R. Orlandi, G. Pollarolo, A. Pullia, F. Recchia, P. Reiter, D. Rosso, W. Rother, M.-D. Salsac, F. Scarlassara, M. Schlarb, S. Siem, Pushpendra P. Singh, P.-A. Söderström, A. M. Stefanini, O. Stézowski, B. Sulignano, S. Szilner, Ch. Theisen, C. A. Ur, and M. Yalcinkaya
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Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,0103 physical sciences ,Shell (structure) ,010306 general physics ,01 natural sciences ,Molecular physics - Published
- 2015
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10. Isomeric decay spectroscopy of theBi217isotope
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D. Bazzacco, J. J. Valiente-Dobón, G. de Angelis, O. Wieland, A. Bracco, R. Menegazzo, H. J. Wollersheim, H. Weick, S.K. Mandal, F. Naqvi, M. Doncel, K. Eppinger, H. Geissel, M. Bowry, S. Lunardi, Davinder Siwal, J. Benlliure, Robert Hoischen, A. M. Denis Bacelar, T. Engert, S. Klupp, P. H. Regan, S. Pietri, N. Goel, A. Algora, P. R. John, T. Habermann, A. Y. Deo, A. Sharma, A. Corsi, E. Sahin, G. F. Farrelly, G. Benzoni, A. Gottardo, N. Kurz, F. C. L. Crespi, F. Farinon, E. Farnea, Zs. Podolyák, N. Al-Dahan, J. Gerl, C. A. Ur, M. Pfützner, Alison Bruce, S. M. Lenzi, Dirk Rudolph, M. Górska, Enrique Casarejos, I. Kojouharov, F. Camera, R. Nicolini, B. Million, S. Leoni, B. Sitar, Matthew Reed, V. Modamio, D. Mengoni, I. Szarka, C. Domingo-Pardo, P. Strmen, H. Schaffner, T.P.D. Swan, Philip M Walker, A. Gadea, M. L. Cortés, A. I. Morales, A. Prochazka, M. Bunce, R. Janik, J. Grebosz, Yassid Ayyad, F. Recchia, D. R. Napoli, E. Gregor, K. Steiger, W. Prokopowicz, C. Nociforo, and P. Boutachkov
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Physics ,Nuclear and High Energy Physics ,Isotope ,Gamma ray ,Isomeric shift ,medicine.anatomical_structure ,Fragmentation (mass spectrometry) ,Quadrupole ,medicine ,Gamma spectroscopy ,Atomic physics ,Nuclear Experiment ,Spectroscopy ,Nucleus - Abstract
The structure of the neutron-rich bismuth isotope 217Bi has been studied for the first time. The fragmentation of a primary 238U beam at the FRS-RISING setup at GSI was exploited to perform γ-decay spectroscopy, since μs isomeric states were expected in this nucleus. Gamma rays following the decay of a t1/2=3 μs isomer were observed, allowing one to establish the low-lying structure of 217Bi. The level energies and the reduced electric quadrupole transition probability B(E2) from the isomeric state are compared to large-scale shell-model calculations.
- Published
- 2014
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11. Collective nature of low-lying excitations in70,72,74Zn from lifetime measurements using the AGATA spectrometer demonstrator
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C. Louchart, A. Obertelli, A. Görgen, W. Korten, D. Bazzacco, B. Birkenbach, B. Bruyneel, E. Clément, P. J. Coleman-Smith, L. Corradi, D. Curien, G. de Angelis, G. de France, J.-P. Delaroche, A. Dewald, F. Didierjean, M. Doncel, G. Duchêne, J. Eberth, M. N. Erduran, E. Farnea, C. Finck, E. Fioretto, C. Fransen, A. Gadea, M. Girod, A. Gottardo, J. Grebosz, T. Habermann, M. Hackstein, T. Huyuk, J. Jolie, D. Judson, A. Jungclaus, N. Karkour, S. Klupp, R. Krücken, A. Kusoglu, S. M. Lenzi, J. Libert, J. Ljungvall, S. Lunardi, G. Maron, R. Menegazzo, D. Mengoni, C. Michelagnoli, B. Million, P. Molini, O. Möller, G. Montagnoli, D. Montanari, D. R. Napoli, R. Orlandi, G. Pollarolo, A. Prieto, A. Pullia, B. Quintana, F. Recchia, P. Reiter, D. Rosso, W. Rother, E. Sahin, M.-D. Salsac, F. Scarlassara, M. Schlarb, S. Siem, P. P. Singh, P.-A. Söderström, A. M. Stefanini, O. Stézowski, B. Sulignano, S. Szilner, Ch. Theisen, C. A. Ur, J. J. Valiente-Dobón, and M. Zielinska
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Nuclear physics ,Physics ,Nuclear and High Energy Physics ,Spectrometer ,010308 nuclear & particles physics ,0103 physical sciences ,media_common.cataloged_instance ,AGATA ,European union ,010306 general physics ,01 natural sciences ,media_common - Abstract
This work has been partly financed by the European Union Seventh Framework Program FP7/2007-2013 under Grant Agreement No. 262010 ENSAR, the Polish MNiSW under Grant No. DPN/N190/AGATA/2009, the Spanish Ministerio de Ciencia e Innovacion under Contract No. FPA2011-29854-C04, and ´ the BMBF under Grant Nos. 05P12RDFN8 and 06DA9040I.
- Published
- 2013
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