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Artikel ; Online: Low Density In-Medium Effects on Light Clusters from Heavy-Ion Data.

Pais, Helena / Bougault, Rémi / Gulminelli, Francesca / Providência, Constança / Bonnet, Eric / Borderie, Bernard / Chbihi, Abdelouahad / Frankland, John D / Galichet, Emmanuelle / Gruyer, Diégo / Henri, Maxime / Le Neindre, Nicolas / Lopez, Olivier / Manduci, Loredana / Parlôg, Marian / Verde, Giuseppe

Physical review letters

2020 Band 125, Heft 1, Seite(n) 12701

Abstract: The modification of the ground state properties of light atomic nuclei in the nuclear and stellar medium is addressed, using chemical equilibrium constants evaluated from a new analysis of the intermediate energy heavy-ion (Xe+Sn) collision data measured ...

Abstract	The modification of the ground state properties of light atomic nuclei in the nuclear and stellar medium is addressed, using chemical equilibrium constants evaluated from a new analysis of the intermediate energy heavy-ion (Xe+Sn) collision data measured by the INDRA Collaboration. Three different reactions are considered, mainly differing by the isotopic content of the emission source. The thermodynamic conditions of the data samples are extracted from the measured multiplicities allowing for a parametrization of the in-medium modification, determined with the single hypothesis that the different nuclear species in a given sample correspond to a unique common value for the density of the expanding source. We show that this correction, which was not considered in previous analyses of chemical constants from heavy-ion collisions, is necessary, since the observables of the analyzed systems show strong deviations from the expected results for an ideal gas of free clusters. This dataset is further compared to a relativistic mean-field model, and seen to be reasonably compatible with a universal correction of the attractive σ-meson coupling.
Sprache	Englisch
Erscheinungsdatum	2020-07-17
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.125.012701
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Konferenzbeitrag ; Online: Micromagnetic NDE techniques for the characterization of precipitation-induced embrittlement of 15 NiCuMoNb 5 (WB 36) steel

Altpeter, I. / Dobmann, G. / Parlog, M. / Szielasko, K.

2003

Abstract: S.465-471 ... The low-alloy, heat-resistant steel 15 NiCuMoNb 5 (WB 36, material number 1.6368) is used as piping and vessel material in boiling water reactor (BWR) and pressurized water reactor (PWR) nuclear power plants in Germany. After long-term ... ...

Abstract	S.465-471 The low-alloy, heat-resistant steel 15 NiCuMoNb 5 (WB 36, material number 1.6368) is used as piping and vessel material in boiling water reactor (BWR) and pressurized water reactor (PWR) nuclear power plants in Germany. After long-term service exposure at temperatures above 320 °C, damage was observed during operation (and in one case during in-service hydro-testing). Preliminary investigations concluded that the service-induced hardening and decrease in toughness in WB 36 materials was caused by the precipitation of copper. For the non-destructive characterization of the precipitation-induced embrittlement of WB 36, service exposure was simulated on a set of tensile test samples. The material was observed to exhibit a peak-hardness of about 240 HV10 after about 1000 hours of service-exposure at 400°C. This is an increase of 40 HV10 with reference to the initial hardness of 200 HV10. As conventional hardness measurements are not applicable in this case, early-detecting the hardness increase non-destructively could enable the provider to stop any further service exposure of the material in time. Therefore, the suitability of micromagnetic NDE techniques for the non-destructive characterization of the Vickers hardness was investigated. A measurement system was successfully calibrated for the prediction of HV10 by Barkhausen noise and field upper harmonics analysis. The practical applicability of this approach was shown by proving its independence on side-effects like plastic deformation and superimposed tensile loads. In all cases, high correlation (0.90 < r² < 0.99) and low deviation (10 HV10 < error bandwidth < 5 HV10) between prediction and aim were achieved. Dynamic magnetostriction measurements and eddy current impedance analyses were found to offer additional possibilities for the non-destructive detection of the hardness changes, as both of them reflect changes in the material's conductivity and permeability.
Schlagwörter	micromagnetic technique ; heat resistant steel ; nondestructive evaluation ; embrittlement ; 620 ; 658 ; 670
Thema/Rubrik (Code)	621
Sprache	Englisch
Erscheinungsland	de
Dokumenttyp	Konferenzbeitrag ; Online
Datenquelle	BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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Artikel ; Online: Observation of a correlated free four-neutron system.

Duer, M / Aumann, T / Gernhäuser, R / Panin, V / Paschalis, S / Rossi, D M / Achouri, N L / Ahn, D / Baba, H / Bertulani, C A / Böhmer, M / Boretzky, K / Caesar, C / Chiga, N / Corsi, A / Cortina-Gil, D / Douma, C A / Dufter, F / Elekes, Z /

Feng, J / Fernández-Domínguez, B / Forsberg, U / Fukuda, N / Gasparic, I / Ge, Z / Gheller, J M / Gibelin, J / Gillibert, A / Hahn, K I / Halász, Z / Harakeh, M N / Hirayama, A / Holl, M / Inabe, N / Isobe, T / Kahlbow, J / Kalantar-Nayestanaki, N / Kim, D / Kim, S / Kobayashi, T / Kondo, Y / Körper, D / Koseoglou, P / Kubota, Y / Kuti, I / Li, P J / Lehr, C / Lindberg, S / Liu, Y / Marqués, F M / Masuoka, S / Matsumoto, M / Mayer, J / Miki, K / Monteagudo, B / Nakamura, T / Nilsson, T / Obertelli, A / Orr, N A / Otsu, H / Park, S Y / Parlog, M / Potlog, P M / Reichert, S / Revel, A / Saito, A T / Sasano, M / Scheit, H / Schindler, F / Shimoura, S / Simon, H / Stuhl, L / Suzuki, H / Symochko, D / Takeda, H / Tanaka, J / Togano, Y / Tomai, T / Törnqvist, H T / Tscheuschner, J / Uesaka, T / Wagner, V / Yamada, H / Yang, B / Yang, L / Yang, Z H / Yasuda, M / Yoneda, K / Zanetti, L / Zenihiro, J / Zhukov, M V

Nature

2022 Band 606, Heft 7915, Seite(n) 678–682

Abstract: A long-standing question in nuclear physics is whether chargeless nuclear systems can exist. To our knowledge, only neutron stars represent near-pure neutron systems, where neutrons are squeezed together by the gravitational force to very high densities. ...

Abstract	A long-standing question in nuclear physics is whether chargeless nuclear systems can exist. To our knowledge, only neutron stars represent near-pure neutron systems, where neutrons are squeezed together by the gravitational force to very high densities. The experimental search for isolated multi-neutron systems has been an ongoing quest for several decades
Sprache	Englisch
Erscheinungsdatum	2022-06-22
Erscheinungsland	England
Dokumenttyp	Journal Article ; Research Support, U.S. Gov't, Non-P.H.S. ; Research Support, Non-U.S. Gov't
ZDB-ID	120714-3
ISSN	1476-4687 ; 0028-0836
ISSN (online)	1476-4687
ISSN	0028-0836
DOI	10.1038/s41586-022-04827-6
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Long lifetime components in the decay of excited super-heavy nuclei

Morjean M. / Chbihi A. / Dasgupta M. / Drouart A. / Frankland J.D. / Frégeau J.D. / Hinde D.J. / Jacquet D. / Nalpas L. / Pârlog M. / Simenel C. / Tassan-Got L. / Williams E.

EPJ Web of Conferences, Vol 63, p

2013 Band 02011

Abstract: For nuclear reactions in which super-heavy nuclei can be formed, the essential difference between the fusion process followed by fission and non-equilibrium processes leading to fission-like fragments is there action time. Quite probable non-equilibrium ... ...

Abstract	For nuclear reactions in which super-heavy nuclei can be formed, the essential difference between the fusion process followed by fission and non-equilibrium processes leading to fission-like fragments is there action time. Quite probable non-equilibrium processes, characterized by very short reaction times, are highlighted thanks to mass-angle correlations. However, long lifetime components associated with fission following fusion have been observed with two independent experimental techniques, providing evidence for the formation of compound nuclei with Z = 120 and 124, followed by mass asymmetric fission.
Schlagwörter	Physics ; QC1-999 ; Science ; Q ; DOAJ:Physics (General) ; DOAJ:Physics and Astronomy
Sprache	Englisch
Erscheinungsdatum	2013-12-01T00:00:00Z
Verlag	EDP Sciences
Dokumenttyp	Artikel ; Online
Datenquelle	BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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Artikel ; Online: Study of nuclear stopping in central collisions at intermediate energies.

Lehaut, G / Durand, D / Lopez, O / Vient, E / Chbihi, A / Frankland, J D / Bonnet, E / Borderie, B / Bougault, R / Galichet, E / Guinet, D / Lautesse, Ph / Le Neindre, N / Napolitani, P / Parlog, M / Rivet, M F / Rosato, E

Physical review letters

2010 Band 104, Heft 23, Seite(n) 232701

Abstract: Nuclear stopping has been investigated in central nuclear collisions at intermediate energies by analyzing kinematically complete events recorded with the help of the 4π multidetector INDRA for a large variety of symmetric systems. It is found that the ... ...

Abstract	Nuclear stopping has been investigated in central nuclear collisions at intermediate energies by analyzing kinematically complete events recorded with the help of the 4π multidetector INDRA for a large variety of symmetric systems. It is found that the mean isotropy ratio defined as the ratio of transverse to parallel momenta (energies) reaches a minimum near the Fermi energy, saturates or slowly increases depending on the mass of the system as the beam energy increases, and then stays lower than unity, showing that significant stopping is not achieved even for the heavier systems. Close to and above the Fermi energy, experimental data show no effect of the isospin content of the interacting system. A comparison with transport model calculations reveals that the latter overestimates the stopping power at low energies.
Sprache	Englisch
Erscheinungsdatum	2010-06-11
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.104.232701
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: X-ray fluorescence from the element with atomic number Z=120.

Frégeau, M O / Jacquet, D / Morjean, M / Bonnet, E / Chbihi, A / Frankland, J D / Rivet, M F / Tassan-Got, L / Dechery, F / Drouart, A / Nalpas, L / Ledoux, X / Parlog, M / Ciortea, C / Dumitriu, D / Fluerasu, D / Gugiu, M / Gramegna, F / Kravchuk, V L /

Marchi, T / Fabris, D / Corsi, A / Barlini, S

Physical review letters

2012 Band 108, Heft 12, Seite(n) 122701

Abstract: An atomic clock based on x-ray fluorescence yields has been used to estimate the mean characteristic time for fusion followed by fission in reactions 238U + 64Ni at 6.6 MeV/A. Inner shell vacancies are created during the collisions in the electronic ... ...

Abstract	An atomic clock based on x-ray fluorescence yields has been used to estimate the mean characteristic time for fusion followed by fission in reactions 238U + 64Ni at 6.6 MeV/A. Inner shell vacancies are created during the collisions in the electronic structure of the possibly formed Z=120 compound nuclei. The filling of these vacancies accompanied by a x-ray emission with energies characteristic of Z=120 can take place only if the atomic transitions occur before nuclear fission. Therefore, the x-ray yield characteristic of the united atom with 120 protons is strongly related to the fission time and to the vacancy lifetimes. K x rays from the element with Z=120 have been unambiguously identified from a coupled analysis of the involved nuclear reaction mechanisms and of the measured photon spectra. A minimum mean fission time τ(f)=2.5×10(-18) s has been deduced for Z=120 from the measured x-ray multiplicity.
Sprache	Englisch
Erscheinungsdatum	2012-03-23
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.108.122701
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Recent results from INDRA

Chbihi A. / Frankland J.D. / Lopez O. / Boisjoli M. / Bonnet E. / Gruyer D. / Marini P. / Ademard G. / Rivet M.-F. / Verde G. / Bougault R. / Borderie B. / Galichet E. / La Commara M. / Le Neindre N. / Legouée E. / Lombardo I. / Manduci L. / Pârlog M. /

Rosato E. / Roy R. / Spadaccini G. / Vient E. / Vigilante M. / Wieleczko J.P.

EPJ Web of Conferences, Vol 88, p

2015 Band 00005

Abstract: Recent results of the INDRA collaboration are presented in this contribution. They concern the evolution of reaction dynamics from the first stage of the collision to the production of fragments. Different probes are used to evidence the stopping/ ... ...

Abstract	Recent results of the INDRA collaboration are presented in this contribution. They concern the evolution of reaction dynamics from the first stage of the collision to the production of fragments. Different probes are used to evidence the stopping/transparency, collective flow and the symmetry energy term of the nuclear equation of state.
Schlagwörter	Science ; Q ; Physics ; QC1-999
Sprache	Englisch
Erscheinungsdatum	2015-01-01T00:00:00Z
Verlag	EDP Sciences
Dokumenttyp	Artikel ; Online
Datenquelle	BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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Artikel ; Online: New scalings in nuclear fragmentation.

Bonnet, E / Borderie, B / Le Neindre, N / Raduta, Ad R / Rivet, M F / Bougault, R / Chbihi, A / Frankland, J D / Galichet, E / Gagnon-Moisan, F / Guinet, D / Lautesse, P / Łukasik, J / Marini, P / Pârlog, M / Rosato, E / Roy, R / Spadaccini, G / Vigilante, M /

Wieleczko, J P / Zwieglinski, B

Physical review letters

2010 Band 105, Heft 14, Seite(n) 142701

Abstract: Fragment partitions of fragmenting hot nuclei produced in central and semiperipheral collisions have been compared in the excitation energy region 4-10 MeV per nucleon where radial collective expansion takes place. It is shown that, for a given total ... ...

Abstract	Fragment partitions of fragmenting hot nuclei produced in central and semiperipheral collisions have been compared in the excitation energy region 4-10 MeV per nucleon where radial collective expansion takes place. It is shown that, for a given total excitation energy per nucleon, the amount of radial collective energy fixes the mean fragment multiplicity. It is also shown that, at a given total excitation energy per nucleon, the different properties of fragment partitions are completely determined by the reduced fragment multiplicity (i.e., normalized to the source size). Freeze-out volumes seem to play a role in the scalings observed.
Sprache	Englisch
Erscheinungsdatum	2010-10-01
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.105.142701
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel: Bimodal behavior of the heaviest fragment distribution in projectile fragmentation.

Bonnet, E / Mercier, D / Borderie, B / Gulminelli, F / Rivet, M F / Tamain, B / Bougault, R / Chbihi, A / Dayras, R / Frankland, J D / Galichet, E / Gagnon-Moisan, F / Guinet, D / Lautesse, P / Lukasik, J / Le Neindre, N / Pârlog, M / Rosato, E / Roy, R /

Vigilante, M / Wieleczko, J P / Zwieglinski, B

Physical review letters

2009 Band 103, Heft 7, Seite(n) 72701

Abstract: The charge distribution of the heaviest fragment detected in the decay of quasiprojectiles produced in intermediate energy heavy-ion collisions has been observed to be bimodal. This feature is expected as a generic signal of phase transition in ... ...

Abstract	The charge distribution of the heaviest fragment detected in the decay of quasiprojectiles produced in intermediate energy heavy-ion collisions has been observed to be bimodal. This feature is expected as a generic signal of phase transition in nonextensive systems. In this Letter, we present new analyses of experimental data from Au on Au collisions at 60, 80, and 100 MeV/nucleon showing that bimodality is largely independent of the data selection procedure and of entrance channel effects. An estimate of the latent heat of the transition is extracted.
Sprache	Englisch
Erscheinungsdatum	2009-08-14
Erscheinungsland	United States
Dokumenttyp	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.103.072701
Datenquelle	MEDical Literature Analysis and Retrieval System OnLINE

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Artikel ; Online: Extracting information from partially depleted Si detectors with digital sampling electronics

Pastore G. / Pasquali G. / Le Neindre N. / Ademard G. / Barlini S. / Bini M. / Bonnet E. / Borderie B. / Bougault R. / Casini G. / Chbihi A. / Cinausero M. / Dueñas J.A. / Edelbruck P. / Frankland J.D. / Gramegna F. / Gruyer D. / Kordyasz A. / Kozik T. /

Lopez O. / Marchi T. / Morelli L. / Olmi A. / Ordine A. / Pârlog M. / Piantelli S. / Poggi G. / Rivet M.-F. / Rosato E. / Salomon F. / Spadaccini G. / Stefanini A.A. / Valdré S. / Vient E. / Twaróg T. / Alba R. / Maiolino C. / Santonocito D.

EPJ Web of Conferences, Vol 88, p

2015 Band 01013

Abstract: A study of the identification properties and of the energy response of a Si-Si-CsI(Tl) ΔE-E telescope exploiting a partially depleted second Si stage has been performed. Five different bias voltages have been applied to the second stage of the telescope, ...

Abstract	A study of the identification properties and of the energy response of a Si-Si-CsI(Tl) ΔE-E telescope exploiting a partially depleted second Si stage has been performed. Five different bias voltages have been applied to the second stage of the telescope, one corresponding to full depletion, the others associated with a depleted layer ranging from 60% to 90% of the detector thickness. Fragment identification has been obtained using either the ΔE-E technique or the Pulse Shape Analysis (PSA). Charge collection efficiency has been evaluated. The ΔE-E performance is not affected by incomplete depletion. Isotopic separation capability improves at lower bias voltages with respect to full depletion, though charge identification thresholds increase.
Schlagwörter	Science ; Q ; Physics ; QC1-999
Sprache	Englisch
Erscheinungsdatum	2015-01-01T00:00:00Z
Verlag	EDP Sciences
Dokumenttyp	Artikel ; Online
Datenquelle	BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

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