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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: 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
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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
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Zs.A 26: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular Jg. 1995 - 2021: Lesesall (1.OG) ab Jg. 2022: Lesesaal (EG)
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Article ; Online: Direct Capture Cross Section and the E_{p}=71 and 105 keV Resonances in the ^{22}Ne(p,γ)^{23}Na Reaction.

Ferraro, F / Takács, M P / Piatti, D / Cavanna, F / Depalo, R / Aliotta, M / Bemmerer, D / Best, A / Boeltzig, A / Broggini, C / Bruno, C G / Caciolli, A / Chillery, T / Ciani, G F / Corvisiero, P / Davinson, T / D'Erasmo, G / Di Leva, A / Elekes, Z /

Fiore, E M / Formicola, A / Fülöp, Zs / Gervino, G / Guglielmetti, A / Gustavino, C / Gyürky, Gy / Imbriani, G / Junker, M / Karakas, A / Kochanek, I / Lugaro, M / Marigo, P / Menegazzo, R / Mossa, V / Pantaleo, F R / Paticchio, V / Perrino, R / Prati, P / Schiavulli, L / Stöckel, K / Straniero, O / Szücs, T / Trezzi, D / Zavatarelli, S

Physical review letters

2018 Volume 121, Issue 17, Page(s) 172701

Abstract: The ^{22}Ne(p,γ)^{23}Na reaction, part of the neon-sodium cycle of hydrogen burning, may explain the observed anticorrelation between sodium and oxygen abundances in globular cluster stars. Its rate is controlled by a number of low-energy resonances and ... ...

Abstract	The ^{22}Ne(p,γ)^{23}Na reaction, part of the neon-sodium cycle of hydrogen burning, may explain the observed anticorrelation between sodium and oxygen abundances in globular cluster stars. Its rate is controlled by a number of low-energy resonances and a slowly varying nonresonant component. Three new resonances at E_{p}=156.2, 189.5, and 259.7 keV have recently been observed and confirmed. However, significant uncertainty on the reaction rate remains due to the nonresonant process and to two suggested resonances at E_{p}=71 and 105 keV. Here, new ^{22}Ne(p,γ)^{23}Na data with high statistics and low background are reported. Stringent upper limits of 6×10^{-11} and 7×10^{-11} eV (90% confidence level), respectively, are placed on the two suggested resonances. In addition, the off-resonant S factor has been measured at unprecedented low energy, constraining the contributions from a subthreshold resonance and the direct capture process. As a result, at a temperature of 0.1 GK the error bar of the ^{22}Ne(p,γ)^{23}Na rate is now reduced by 3 orders of magnitude.
Language	English
Publishing date	2018-11-13
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.121.172701
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Article ; Online: Evidence for heavy hyperhydrogen (Λ)(6)h.

Agnello, M / Benussi, L / Bertani, M / Bhang, H C / Bonomi, G / Botta, E / Bregant, M / Bressani, T / Bufalino, S / Busso, L / Calvo, D / Camerini, P / Dalena, B / De Mori, F / D'Erasmo, G / Fabbri, F L / Feliciello, A / Filippi, A / Fiore, E M /

Fontana, A / Fujioka, H / Genova, P / Gianotti, P / Grion, N / Lucherini, V / Marcello, S / Mirfakhrai, N / Moia, F / Morra, O / Nagae, T / Outa, H / Pantaleo, A / Paticchio, V / Piano, S / Rui, R / Simonetti, G / Wheadon, R / Zenoni, A / Gal, A

Physical review letters

2012 Volume 108, Issue 4, Page(s) 42501

Abstract: Evidence for the neutron-rich hypernucleus (Λ)(6)H is presented from the FINUDA experiment at DAΦNE, Frascati, studying (π+,π-) pairs in coincidence from the K(stop)(-) + (6)Li →(Λ)(6)H + π+ production reaction followed by (Λ)(6)H → (6)He + π- weak decay. ...

Abstract	Evidence for the neutron-rich hypernucleus (Λ)(6)H is presented from the FINUDA experiment at DAΦNE, Frascati, studying (π+,π-) pairs in coincidence from the K(stop)(-) + (6)Li →(Λ)(6)H + π+ production reaction followed by (Λ)(6)H → (6)He + π- weak decay. The production rate of (Λ)(6) undergoing this two-body π- decay is determined to be (2.9 ± 2.0) × 10(-6)/K(stop)(-). Its binding energy, evaluated jointly from production and decay, is BΛ((Λ)(6)H) = (4.0 ± 1.1) MeV with respect to (5)H+Λ. A systematic difference of (0.98 ± 0.74) MeV between BΛ values derived separately from decay and from production is tentatively assigned to the (Λ)(6)H 0(g.s.)(+) → 1+ excitation.
Language	English
Publishing date	2012-01-27
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.108.042501
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Article: Isospin relaxation in the reaction 98Mo + 98Mo at 14.7 MeV/nucleon.

Guarino / Fiore / Pantaleo / Paticchio / Gobbi / Petrovici

Physical review. C, Nuclear physics

1988 Volume 38, Issue 4, Page(s) 1948–1951

Language	English
Publishing date	1988-10
Publishing country	United States
Document type	Journal Article
ZDB-ID	209771-0
ISSN	1089-490X ; 0556-2813 ; 2469-9985
ISSN (online)	1089-490X
ISSN	0556-2813 ; 2469-9985
DOI	10.1103/physrevc.38.1948
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Article ; Online: Measurement of Compound Nucleus Space-Time Extent with Two-Neutron Correlation Functions.

Colonna / Bowman / Celano / D'Erasmo / Fiore / Pantaleo / Paticchio / Tagliente / Pratt

Physical review letters

1995 Volume 75, Issue 23, Page(s) 4190–4193

Language	English
Publishing date	1995-12-04
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.75.4190
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Article: Neutron multiplicities and energy sharing in the inelastic collisions of 32S on 64Ni at E/A=4.9 MeV.

Fiore / D'Erasmo / Pantaleo / Paticchio / Petruzzelli / Quirini / Tagliente / Lanzanò / Pagano

Physical review. C, Nuclear physics

1994 Volume 50, Issue 3, Page(s) 1709–1712

Language	English
Publishing date	1994-09
Publishing country	United States
Document type	Journal Article
ZDB-ID	209771-0
ISSN	1089-490X ; 0556-2813 ; 2469-9985
ISSN (online)	1089-490X
ISSN	0556-2813 ; 2469-9985
DOI	10.1103/physrevc.50.1709
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Article ; Online: Neutron-rich hypernuclei

Marcello S. / Mirfakhrai N. / Lucherini V. / Grion N. / Gianotti P. / Genova P. / Fujioka H. / Fontana A. / Fiore E. M. / Filippi A. / Feliciello A. / Fabbri F. L. / D’Erasmo G. / De Mori F. / Dalena B. / Camerini P. / Calvo D. / Busso L. / Bufalino S. /

Bressani T. / Bregant M. / Bonomi G. / Botta E. / Bhang H. C. / Bertani M. / Benussi L. / Agnello M. / Moia F. / Morra O. / Nagae T. / Outa H. / Pantaleo A. / Paticchio V. / Piano S. / Rui R. / Simonetti G. / Wheadon R. / Zenoni A. / Gal A.

EPJ Web of Conferences, Vol 37, p

evidence for 6ΛH and search for 9ΛHe

2012 Volume 01023

Abstract: The FINUDA experiment at DAΦNE, Frascati, has found evidence for the neutron-rich hypernucleus 6ΛH studying (π+, π−) pairs in coincidence from the K−stop+6Li → 6ΛH+π+ production reaction followed by 6ΛH → 6He + π− weak decay. The production rate of 6ΛH ... ...

Abstract	The FINUDA experiment at DAΦNE, Frascati, has found evidence for the neutron-rich hypernucleus 6ΛH studying (π+, π−) pairs in coincidence from the K−stop+6Li → 6ΛH+π+ production reaction followed by 6ΛH → 6He + π− weak decay. The production rate of 6ΛH undergoing this two-body π− decay has been found to be (2.9 ± 2.0) · 10−6/K−stop. Its binding energy has been evaluated to be BΛ(6ΛH) = (4.0 ± 1.1) MeV with respect to 5H + Λ, jointly from production and decay. A systematic difference of (0.98 ± 0.74) MeV between BΛ values derived separately from decay and from production has been tentatively assigned to the 6ΛH 0+g.s. → 1+ excitation. A similar investigation has been carried out for the neutron-rich hypernucleus 9ΛHe studying the K−stop + 9Be → 9ΛHe + π+ reaction in coincidence with the 9ΛHe → 9Li + π− weak decay; an upper limit for the production rate of 9ΛHe undergoing the two-body π− decay has been found to be 4.2 · 10−6/K−stop (90% C.L.).
Keywords	Physics ; QC1-999 ; Science ; Q ; DOAJ:Physics (General) ; DOAJ:Physics and Astronomy
Language	English
Publishing date	2012-12-01T00:00:00Z
Publisher	EDP Sciences
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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Article: Neutron emission and energy partition in the inelastic reactions of 154 MeV 32S on 100Mo.

Fiore / D'Erasmo / Guarino / Pantaleo / Paticchio / Viesti / Lanzanò / Pagano

Physical review. C, Nuclear physics

1990 Volume 41, Issue 2, Page(s) 419–422

Language	English
Publishing date	1990-02
Publishing country	United States
Document type	Journal Article
ZDB-ID	209771-0
ISSN	1089-490X ; 0556-2813 ; 2469-9985
ISSN (online)	1089-490X
ISSN	0556-2813 ; 2469-9985
DOI	10.1103/physrevc.41.r419
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