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Article ; Online: Proton-Capture Rates on Carbon Isotopes and Their Impact on the Astrophysical ^{12}C/^{13}C Ratio.

Skowronski, J / Boeltzig, A / Ciani, G F / Csedreki, L / Piatti, D / Aliotta, M / Ananna, C / Barile, F / Bemmerer, D / Best, A / Broggini, C / Bruno, C G / Caciolli, A / Campostrini, M / Cavanna, F / Colombetti, P / Compagnucci, A / Corvisiero, P / Davinson, T /

Depalo, R / Di Leva, A / Elekes, Z / Ferraro, F / Formicola, A / Fülöp, Zs / Gervino, G / Gesuè, R M / Guglielmetti, A / Gustavino, C / Gyürky, Gy / Imbriani, G / Junker, M / Lugaro, M / Marigo, P / Masha, E / Menegazzo, R / Paticchio, V / Perrino, R / Prati, P / Rapagnani, D / Rigato, V / Schiavulli, L / Sidhu, R S / Straniero, O / Szücs, T / Zavatarelli, S

Physical review letters

2023 Volume 131, Issue 16, Page(s) 162701

Abstract: The ^{12}C/^{13}C ratio is a significant indicator of nucleosynthesis and mixing processes during hydrogen burning in stars. Its value mainly depends on the relative rates of the ^{12}C(p,γ)^{13}N and ^{13}C(p,γ)^{14}N reactions. Both reactions have been ...

Abstract	The ^{12}C/^{13}C ratio is a significant indicator of nucleosynthesis and mixing processes during hydrogen burning in stars. Its value mainly depends on the relative rates of the ^{12}C(p,γ)^{13}N and ^{13}C(p,γ)^{14}N reactions. Both reactions have been studied at the Laboratory for Underground Nuclear Astrophysics (LUNA) in Italy down to the lowest energies to date (E_{c.m.}=60 keV) reaching for the first time the high energy tail of hydrogen burning in the shell of giant stars. Our cross sections, obtained with both prompt γ-ray detection and activation measurements, are the most precise to date with overall systematic uncertainties of 7%-8%. Compared with most of the literature, our results are systematically lower, by 25% for the ^{12}C(p,γ)^{13}N reaction and by 30% for ^{13}C(p,γ)^{14}N. We provide the most precise value up to now of 3.6±0.4 in the 20-140 MK range for the lowest possible ^{12}C/^{13}C ratio that can be produced during H burning in giant stars.
Language	English
Publishing date	2023-11-05
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.131.162701
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Article ; Online: High-Precision Spectroscopy of ^{20}O Benchmarking Ab Initio Calculations in Light Nuclei.

Zanon, I / Clément, E / Goasduff, A / Menéndez, J / Miyagi, T / Assié, M / Ciemała, M / Flavigny, F / Lemasson, A / Matta, A / Ramos, D / Rejmund, M / Achouri, L / Ackermann, D / Barrientos, D / Beaumel, D / Benzoni, G / Boston, A J / Boston, H C /

Bottoni, S / Bracco, A / Brugnara, D / de France, G / de Sereville, N / Delaunay, F / Desesquelles, P / Didierjean, F / Domingo-Prato, C / Dudouet, J / Eberth, J / Fernández, D / Fougères, C / Gadea, A / Galtarossa, F / Girard-Alcindor, V / Gonzales, V / Gottardo, A / Hammache, F / Harkness-Brennan, L J / Hess, H / Judson, D S / Jungclaus, A / Kaşkaş, A / Kim, Y H / Kuşoğlu, A / Labiche, M / Leblond, S / Lenain, C / Lenzi, S M / Leoni, S / Li, H / Ljungvall, J / Lois-Fuentes, J / Lopez-Martens, A / Maj, A / Menegazzo, R / Mengoni, D / Michelagnoli, C / Million, B / Napoli, D R / Nyberg, J / Pasqualato, G / Podolyak, Zs / Pullia, A / Quintana, B / Recchia, F / Regueira-Castro, D / Reiter, P / Rezynkina, K / Rojo, J S / Salsac, M D / Sanchis, E / Şenyiğit, M / Siciliano, M / Sohler, D / Stezowski, O / Theisen, Ch / Utepov, A / Valiente-Dobón, J J / Verney, D / Zielinska, M

Physical review letters

2024 Volume 131, Issue 26, Page(s) 262501

Abstract: The excited states of unstable ^{20}O were investigated via γ-ray spectroscopy following the ^{19}O(d,p)^{20}O reaction at 8 AMeV. By exploiting the Doppler shift attenuation method, the lifetimes of the 2_{2}^{+} and 3_{1}^{+} states were firmly ... ...

Abstract	The excited states of unstable ^{20}O were investigated via γ-ray spectroscopy following the ^{19}O(d,p)^{20}O reaction at 8 AMeV. By exploiting the Doppler shift attenuation method, the lifetimes of the 2_{2}^{+} and 3_{1}^{+} states were firmly established. From the γ-ray branching and E2/M1 mixing ratios for transitions deexciting the 2_{2}^{+} and 3_{1}^{+} states, the B(E2) and B(M1) were determined. Various chiral effective field theory Hamiltonians, describing the nuclear properties beyond ground states, along with a standard USDB interaction, were compared with the experimentally obtained data. Such a comparison for a large set of γ-ray transition probabilities with the valence space in medium similarity renormalization group ab initio calculations was performed for the first time in a nucleus far from stability. It was shown that the ab initio approaches using chiral effective field theory forces are challenged by detailed high-precision spectroscopic properties of nuclei. The reduced transition probabilities were found to be a very constraining test of the performance of the ab initio models.
Language	English
Publishing date	2024-01-12
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.131.262501
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Evidence of Partial Seniority Conservation in the πg_{9/2} Shell for the N=50 Isotones.

Pérez-Vidal, R M / Gadea, A / Domingo-Pardo, C / Gargano, A / Valiente-Dobón, J J / Clément, E / Lemasson, A / Coraggio, L / Siciliano, M / Szilner, S / Bast, M / Braunroth, T / Collado, J / Corina, A / Dewald, A / Doncel, M / Dudouet, J / de France, G / Fransen, C /

González, V / Hüyük, T / Jacquot, B / John, P R / Jungclaus, A / Kim, Y H / Korichi, A / Labiche, M / Lenzi, S / Li, H / Ljungvall, J / López-Martens, A / Mengoni, D / Michelagnoli, C / Müller-Gatermann, C / Napoli, D R / Navin, A / Quintana, B / Ramos, D / Rejmund, M / Sanchis, E / Simpson, J / Stezowski, O / Wilmsen, D / Zielińska, M / Boston, A J / Barrientos, D / Bednarczyk, P / Benzoni, G / Birkenbach, B / Boston, H C / Bracco, A / Cederwall, B / Cullen, D M / Didierjean, F / Eberth, J / Gottardo, A / Goupil, J / Harkness-Brennan, L J / Hess, H / Judson, D S / Kaşkaş, A / Korten, W / Leoni, S / Menegazzo, R / Million, B / Nyberg, J / Podolyak, Zs / Pullia, A / Ralet, D / Recchia, F / Reiter, P / Rezynkina, K / Salsac, M D / Şenyiğit, M / Sohler, D / Theisen, Ch / Verney, D

Physical review letters

2022 Volume 129, Issue 11, Page(s) 112501

Abstract: The reduced transition probabilities for the 4_{1}^{+}→2_{1}^{+} and 2_{1}^{+}→0_{1}^{+} transitions in ^{92}Mo and ^{94}Ru and for the 4_{1}^{+}→2_{1}^{+} and 6_{1}^{+}→4_{1}^{+} transitions in ^{90}Zr have been determined in this experiment making use ... ...

Abstract	The reduced transition probabilities for the 4_{1}^{+}→2_{1}^{+} and 2_{1}^{+}→0_{1}^{+} transitions in ^{92}Mo and ^{94}Ru and for the 4_{1}^{+}→2_{1}^{+} and 6_{1}^{+}→4_{1}^{+} transitions in ^{90}Zr have been determined in this experiment making use of a multinucleon transfer reaction. These results have been interpreted on the basis of realistic shell-model calculations in the f_{5/2}, p_{3/2}, p_{1/2}, and g_{9/2} proton valence space. Only the combination of extensive lifetime information and large scale shell-model calculations allowed the extent of the seniority conservation in the N=50 g_{9/2} orbital to be understood. The conclusion is that seniority is largely conserved in the first πg_{9/2} orbital.
Language	English
Publishing date	2022-09-26
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.129.112501
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: Direct Measurement of the ^{13}C(α,n)^{16}O Cross Section into the s-Process Gamow Peak.

Ciani, G F / Csedreki, L / Rapagnani, D / Aliotta, M / Balibrea-Correa, J / Barile, F / Bemmerer, D / Best, A / Boeltzig, A / Broggini, C / Bruno, C G / Caciolli, A / Cavanna, F / Chillery, T / Colombetti, P / Corvisiero, P / Cristallo, S / Davinson, T / Depalo, R /

Di Leva, A / Elekes, Z / Ferraro, F / Fiore, E / Formicola, A / Fülöp, Zs / Gervino, G / Guglielmetti, A / Gustavino, C / Gyürky, Gy / Imbriani, G / Junker, M / Lugaro, M / Marigo, P / Masha, E / Menegazzo, R / Mossa, V / Pantaleo, F R / Paticchio, V / Perrino, R / Piatti, D / Prati, P / Schiavulli, L / Stöckel, K / Straniero, O / Szücs, T / Takács, M P / Terrasi, F / Vescovi, D / Zavatarelli, S

Physical review letters

2021 Volume 127, Issue 15, Page(s) 152701

Abstract: One of the main neutron sources for the astrophysical s process is the reaction ^{13}C(α,n)^{16}O, taking place in thermally pulsing asymptotic giant branch stars at temperatures around 90 MK. To model the nucleosynthesis during this process the reaction ...

Abstract	One of the main neutron sources for the astrophysical s process is the reaction ^{13}C(α,n)^{16}O, taking place in thermally pulsing asymptotic giant branch stars at temperatures around 90 MK. To model the nucleosynthesis during this process the reaction cross section needs to be known in the 150-230 keV energy window (Gamow peak). At these sub-Coulomb energies, cross section direct measurements are severely affected by the low event rate, making us rely on input from indirect methods and extrapolations from higher-energy direct data. This leads to an uncertainty in the cross section at the relevant energies too high to reliably constrain the nuclear physics input to s-process calculations. We present the results from a new deep-underground measurement of ^{13}C(α,n)^{16}O, covering the energy range 230-300 keV, with drastically reduced uncertainties over previous measurements and for the first time providing data directly inside the s-process Gamow peak. Selected stellar models have been computed to estimate the impact of our revised reaction rate. For stars of nearly solar composition, we find sizeable variations of some isotopes, whose production is influenced by the activation of close-by branching points that are sensitive to the neutron density, in particular, the two radioactive nuclei ^{60}Fe and ^{205}Pb, as well as ^{152}Gd.
Language	English
Publishing date	2021-10-22
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.127.152701
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Book ; Thesis: Beta decay studies of shell model aspects of N=83 and 84 nuclei

Menegazzo, Roberto

(Berichte des Forschungszentrums Jülich ; 2529)

1991

Author's details	Roberto Menegazzo
Series title	Berichte des Forschungszentrums Jülich ; 2529
Language	English
Size	71 S, graph. Darst
Document type	Book ; Thesis
Thesis / German Habilitation thesis	Zugl.: Köln, Univ., Diss., 1991
Database	Library catalogue of the German National Library of Science and Technology (TIB), Hannover

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Book ; Thesis: Beta Decay studies of Shell Model Aspects of N83 and 84 Nuclei

Menegazzo, Roberto

1991

Author's details	vorgelegt von Roberto Menegazzo
Language	Undetermined
Size	71 S, graph. Darst
Document type	Book ; Thesis
Thesis / German Habilitation thesis	@Köln, Univ., Diss. : 1991
Database	Former special subject collection: coastal and deep sea fishing

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Book ; Thesis: Beta decay studies of shell model aspects of N=83 and 84 nuclei

Menegazzo, Roberto

(Berichte des Forschungszentrums Jülich ; 2529)

1991

Author's details	Roberto Menegazzo. [Forschungszentrum Jülich GmbH, KFA, Institut für Kernphysik]
Series title	Berichte des Forschungszentrums Jülich ; 2529
Language	Undetermined
Size	71 S, graph. Darst, 30 cm
Publisher	Forschungszentrum Jülich, Zentralbibliothek
Publishing place	Jülich
Document type	Book ; Thesis
Thesis / German Habilitation thesis	Zugl.: Köln, Univ., Diss. : 1991
Database	Former special subject collection: coastal and deep sea fishing

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Article ; Online: Erratum: Three New Low-Energy Resonances in the ^{22}Ne(p,γ)^{23}Na Reaction [Phys. Rev. Lett. 115, 252501 (2015)].

Cavanna, F / Depalo, R / Aliotta, M / Anders, M / Bemmerer, D / Best, A / Boeltzig, A / Broggini, C / Bruno, C G / Caciolli, A / Corvisiero, P / Davinson, T / di Leva, A / Elekes, Z / Ferraro, F / Formicola, A / Fülöp, Zs / Gervino, G / Guglielmetti, A /

Gustavino, C / Gyürky, Gy / Imbriani, G / Junker, M / Menegazzo, R / Mossa, V / Pantaleo, F R / Prati, P / Scott, D A / Somorjai, E / Straniero, O / Strieder, F / Szücs, T / Takács, M P / Trezzi, D

Physical review letters

2018 Volume 120, Issue 23, Page(s) 239901

Abstract: This corrects the article DOI: 10.1103/PhysRevLett.115.252501. ...

Abstract	This corrects the article DOI: 10.1103/PhysRevLett.115.252501.
Language	English
Publishing date	2018-06-22
Publishing country	United States
Document type	Journal Article ; Published Erratum
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.120.239901
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: The baryon density of the Universe from an improved rate of deuterium burning.

Mossa, V / Stöckel, K / Cavanna, F / Ferraro, F / Aliotta, M / Barile, F / Bemmerer, D / Best, A / Boeltzig, A / Broggini, C / Bruno, C G / Caciolli, A / Chillery, T / Ciani, G F / Corvisiero, P / Csedreki, L / Davinson, T / Depalo, R / Di Leva, A /

Elekes, Z / Fiore, E M / Formicola, A / Fülöp, Zs / Gervino, G / Guglielmetti, A / Gustavino, C / Gyürky, G / Imbriani, G / Junker, M / Kievsky, A / Kochanek, I / Lugaro, M / Marcucci, L E / Mangano, G / Marigo, P / Masha, E / Menegazzo, R / Pantaleo, F R / Paticchio, V / Perrino, R / Piatti, D / Pisanti, O / Prati, P / Schiavulli, L / Straniero, O / Szücs, T / Takács, M P / Trezzi, D / Viviani, M / Zavatarelli, S

Nature

2020 Volume 587, Issue 7833, Page(s) 210–213

Abstract: Light elements were produced in the first few minutes of the Universe through a sequence of nuclear reactions known as Big Bang nucleosynthesis (BBN) ...

Abstract	Light elements were produced in the first few minutes of the Universe through a sequence of nuclear reactions known as Big Bang nucleosynthesis (BBN)
Language	English
Publishing date	2020-11-11
Publishing country	England
Document type	Journal Article ; 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/s41586-020-2878-4
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

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Article ; Online: Preface

Lunardi S. / Bizzeti P.G. / Bucci C. / Chiari M. / Dainese A. / Di Nezza P. / Menegazzo R. / Nannini A. / Signorini C. / Valiente-Dobon J.J.

EPJ Web of Conferences, Vol 66, p

2014 Volume 00001

Keywords	Physics ; QC1-999 ; Science ; Q
Language	English
Publishing date	2014-03-01T00:00:00Z
Publisher	EDP Sciences
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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