First measurement of 87Rb(α, xn) cross sections at weak r-process energies in supernova ν-driven ejecta to investigate elemental abundances in low-metallicity stars - INSPIRE

DataBETA

First measurement of 87Rb(α, xn) cross sections at weak r-process energies in supernova ν-driven ejecta to investigate elemental abundances in low-metallicity stars

C. Fougères
(
- Argonne, PHY and
- CEA DAM
)
,
M.L. Avila
(
- Argonne, PHY
)
,
A. Psaltis
(
- Duke U. and
- TUNL, Durham
)
,
M. Anastasiou
(
- LLNL, Livermore
)
,
S. Bae
(
- IBS, Daejeon, CENS
)

Feb 15, 2025

15 pages

e-Print:

2502.10808 [nucl-ex]

View in:

reference search0 citations

Citations per year

0 Citations

Abstract: (arXiv)

Observed abundances of Z ~ 40 elements in metal-poor stars vary from star to star, indicating that the rapid and slow neutron capture processes may not contribute alone to the synthesis of elements beyond iron. The weak r-process was proposed to produce Z ~ 40 elements in a subset of old stars. Thought to occur in the ν-driven ejecta of a core-collapse supernova, (α, xn) reactions would drive the nuclear flow toward heavier masses at T = 2-5 GK. However, current comparisons between modelled and observed yields do not bring satisfactory insights into the stellar environment, mainly due to the uncertainties of the nuclear physics inputs where the dispersion in a given reaction rate often exceeds one order of magnitude. Involved rates are calculated with the statistical model where the choice of an α-optical-model potential (αOMP) leads to such a poor precision. The first experiment on 87Rb(α, xn) reactions at weak r-process energies is reported here. Total inclusive cross sections were assessed at Ec.m. = 8.1 - 13 MeV (3.7 - 7.6 GK) with the active target MUlti-Sampling Ionization Chamber (MUSIC). With a N = 50 seed nucleus, the measured values agree with statistical model estimates using the αOMP Atomki-V2. A re-evaluated reaction rate was incorporated into new nucleosynthesis calculations, focusing on ν-driven ejecta conditions known to be sensitive to this specific rate. These conditions were found to fail to reproduce the lighter-heavy element abundances in metal-poor stars.

Note:

15 pages, 7 figures. Preprint version before peer review or editing, as submitted to Astrophysical Journal

References(68)

Figures(8)

C. Angus
,
M. Williams
,
A. Andreyev

- EPJ Web Conf. 279 (2023) 11003
•
DOI:
- 10.1051/epjconf/202327911003

Production of Light Element Primary Process nuclei in neutrino-driven winds

A. Arcones
(
- Darmstadt, Tech. U. and
- Darmstadt, GSI and
- Basel U.
)
,
F. Montes
(
- Michigan State U. and
- Michigan State U., NSCL
)

- Astrophys.J. 731 (2011) 5
•
e-Print:
- 1007.1275
•
DOI:
- 10.1088/0004-637X/731/1/5

Study of the astrophysically important $\boldsymbol{^{23}\mathrm{Na}(\alpha,p)^{26}\mathrm{Mg}}$ and $\boldsymbol{^{23}\mathrm{Na}(\alpha,n)^{26}\mathrm{Al}}$ reactions

et al.

- Phys.Rev.C 94 (2016) 6, 065804
•
e-Print:
- 1608.03292
•
DOI:
- 10.1103/PhysRevC.94.065804

Study of (α,p) and (α,n) reactions with a Multi-Sampling Ionization Chamber

et al.

- Nucl.Instrum.Meth.A 859 (2017) 63-68
•
e-Print:
- 1608.03290
•
DOI:
- 10.1016/j.nima.2017.03.060

Further explorations of the $\alpha$ -particle optical model potential at low energies for the mass range $A\approx 45$ - $209$

- Phys.Rev.C 90 (2014) 4, 044612
•
e-Print:
- 1406.1656
•
DOI:
- 10.1103/PhysRevC.90.044612

Next-generation experiments with the Active Target Time Projection Chamber (AT-TPC)

et al.

- Nucl.Instrum.Meth.A 954 (2020) 161341
•
DOI:
- 10.1016/j.nima.2018.10.019

ATHENA: An active target detector for the measurement of total cross sections

et al.

- Nucl.Instrum.Meth.A 1047 (2023) 167777
•
DOI:
- 10.1016/j.nima.2022.167777

Impact of $(\alpha,n)$ reactions on weak r-process in neutrino-driven winds

- J.Phys.G 44 (2017) 5, 054003
•
e-Print:
- 1612.02435
•
DOI:
- 10.1088/1361-6471/aa63bd

Nuclear physics uncertainties in neutrino-driven, neutron-rich supernova ejecta

- Phys.Rev.C 101 (2020) 5, 055807
•
e-Print:
- 2001.02085
•
DOI:
- 10.1103/PhysRevC.101.055807

Survey of astrophysical conditions in neutrino-driven supernova ejecta nucleosynthesis

- Astrophys.J. 855 (2018) 2, 135
•
e-Print:
- 1802.00737
•
DOI:
- 10.3847/1538-4357/aaadbe

P. Carnelli

- Nucl.Instrum.Meth.A 799 (2015) 197
•
DOI:
- 10.1016/j.nima.2015.07.030

The Jina Reaclib Database: its Recent Updates and Impact on Type-i X-ray Bursts

et al.

- Astrophys.J.Suppl. 189 (2010) 1, 240
•
DOI:
- 10.1088/0067-0049/189/1/240

Neutron Star Mergers Might not be the Only Source of r-Process Elements in the Milky Way

et al.

- Astrophys.J. 875 (2019) 2, 106
•
e-Print:
- 1809.03525
•
DOI:
- 10.3847/1538-4357/ab10db

Improved global α -optical model potentials at low energies

- Nucl.Phys.A 707 (2002) 253-276
•
DOI:
- 10.1016/S0375-9474(02)00756-X

Direct cross-section measurement of the weak $r$ -process ${}^{88}{Sr} (α, n) {}^{91}{Zr}$ reaction in $ν$ -driven winds of core-collapse supernovae

et al.

- Phys.Rev.C 109 (2024) 6, 065805
•
e-Print:
- 2402.01534
•
DOI:
- 10.1103/PhysRevC.109.065805

From Nuclei to the Cosmos: Tracing Heavy-Element Production with the Oldest Stars

Anna Frebel
(
- MIT, Cambridge, Dept. Phys. and
- MIT, MKI
)

- Ann.Rev.Nucl.Part.Sci. 68 (2018) 237-269
•
e-Print:
- 1806.08955
•
DOI:
- 10.1146/annurev-nucl-101917-021141

Neutrino-induced nucleosynthesis of a>64 nuclei: the nu p-process

C. Frohlich
(
- Basel U.
)
,
Gabriel Martinez-Pinedo
(
- ICREA, Barcelona and
- Barcelona, IEEC
)
,
M. Liebendorfer
(
- Canadian Inst. Theor. Astrophys. and
- Basel U.
)
,
F.-K. Thielemann
(
- Basel U.
)
,
E. Bravo
(
- Barcelona, Polytechnic U.
)

et al.

- Phys.Rev.Lett. 96 (2006) 142502
•
e-Print:
- astro-ph/0511376
•
DOI:
- 10.1103/PhysRevLett.96.142502

Uncertainties in the comparison of fusion and reaction cross sections of different systems involving weakly bound nuclei

P.R.S. Gomes
(
- Niteroi, Fluminense U.
)
,
J. Lubian
(
- Niteroi, Fluminense U.
)
,
I. Padron
(
- Niteroi, Fluminense U.
)
,
R.M. Anjos
(
- Niteroi, Fluminense U.
)

- Phys.Rev.C 71 (2005) 017601
•
DOI:
- 10.1103/PhysRevC.71.017601

HOW MANY NUCLEOSYNTHESIS PROCESSES EXIST AT LOW METALLICITY?

- Astrophys.J. 797 (2014) 2, 123
•
e-Print:
- 1408.4135
•
DOI:
- 10.1088/0004-637X/797/2/123

The Inelastic Scattering of Neutrons

- Phys.Rev. 87 (1952) 366-373
•
DOI:
- 10.1103/PhysRev.87.366

$r$ -Process Nucleosynthesis: Connecting Rare-Isotope Beam Facilities with the Cosmos

C.J. Horowitz
(
- Indiana U. and
- Michigan State U., JINA
)
,
A. Arcones
(
)
,
B. Côté
(
- Michigan State U. and
- Konkoly Observ. and
- Michigan State U., JINA
)
,
I. Dillmann
(
- TRIUMF and
- Victoria U. and
- Michigan State U., JINA
)
,
W. Nazarewicz
(
- Michigan State U. and
- Michigan State U., East Lansing (main)
)

et al.

- J.Phys.G 46 (2019) 8, 083001
•
e-Print:
- 1805.04637
•
DOI:
- 10.1088/1361-6471/ab0849

Range and stopping-power tables for 2.5–500 MeV/nucleon heavy ions in solids

- Atom.Data Nucl.Data Tabl. 46 (1990) 1-213
•
DOI:
- 10.1016/0092-640X(90)90001-Z

Explosive Nucleosynthesis of Weak r-Process Elements in Extremely Metal-Poor Core-Collapse Supernovae

- Astrophys.J. 692 (2009) 1517-1531
•
e-Print:
- 0810.5661
•
DOI:
- 10.1088/0004-637X/692/2/1517

MuSIC@Indiana: An effective tool for accurate measurement of fusion with low-intensity radioactive beams

et al.

- Nucl.Instrum.Meth.A 1014 (2021) 165697
•
e-Print:
- 2107.07008
•
DOI:
- 10.1016/j.nima.2021.165697

Origin of the heavy elements in binary neutron-star mergers from a gravitational wave event

Daniel Kasen
(
- UC, Berkeley and
- LBNL, NSD
)
,
Brian Metzger
(
- Columbia U.
)
,
Jennifer Barnes
(
- Columbia U.
)
,
Eliot Quataert
(
- UC, Berkeley
)
,
Enrico Ramirez-Ruiz
(
- UC, Santa Cruz and
- DARK Cosmology Ctr.
)

- Nature 551 (2017) 80
•
e-Print:
- 1710.05463
•
DOI:
- 10.1038/nature24453

1-25 of 68
1
2
3
25 / page