J/ApJ/755/L10 Revised stellar neutron capture reactivities (Rauscher, 2012)
Formalism for inclusion of measured reaction cross sections in stellar rates
including uncertainties and its application to neutron capture in the s-process.
Rauscher T.
<Astrophys. J., 755, L10 (2012)>
=2012ApJ...755L..10R 2012ApJ...755L..10R
ADC_Keywords: Atomic physics
Keywords: nuclear reactions, nucleosynthesis, abundances
Abstract:
A general formalism to include experimental reaction cross sections
into calculations of stellar rates is presented. It also allows us to
assess the maximally possible reduction of uncertainties in the
stellar rates by experiments. As an example for the application of the
procedure, stellar neutron capture reactivities from KADoNiS v0.3 are
revised and the remaining uncertainties shown. Many of the
uncertainties in the stellar rates are larger than those obtained
experimentally. This has important consequences for s-process models
and the interpretation of meteoritic data because it allows the rates
of some reactions to vary within a larger range than previously
assumed.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 98 339 Revised uncertainty factors of stellar (n,γ)
reactivities at 11 plasma temperatures --
updated version from erratum published
in 2018, ApJ, 864, L40
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See also:
J/ApJ/738/143 : Ground-state contributions around s-process (Rauscher+, 2011)
J/MNRAS/404/1529 : s-process in low-metallicity stars (Bisterzo+, 2010)
http://www.kadonis.org/ : Karlsruhe Astrophysical Database of Nucleosynthesis
in Stars home page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- El Element symbol
5- 6 I2 --- ZT [10/83] Charge number of target nucleus
8- 10 I3 --- AT [20/210] Mass number of target nucleus
12- 18 F7.4 --- UR5 [1/2.14]?=-1 Uncertainty factor for stellar
reactivity at kT=5 keV (1)
20- 26 F7.4 --- UR10 [1/2.14]?=-1 Uncertainty factor for stellar
reactivity at kT=10 keV (1)
28- 34 F7.4 --- UR15 [1/2.14]?=-1 Uncertainty factor for stellar
reactivity at kT=15 keV (1)
36- 42 F7.4 --- UR20 [1/2.2]?=-1 Uncertainty factor for stellar
reactivity at kT=20 keV (1)
44- 50 F7.4 --- UR25 [1/2.22]?=-1 Uncertainty factor for stellar
reactivity at kT=25 keV (1)
52- 58 F7.4 --- UR30 [1/2.22]?=-1 Uncertainty factor for stellar
reactivity at kT=30 keV (1)
60- 66 F7.4 --- UR40 [1/2.22]?=-1 Uncertainty factor for stellar
reactivity at kT=40 keV (1)
68- 74 F7.4 --- UR50 [1/2.22]?=-1 Uncertainty factor for stellar
reactivity at kT=50 keV (1)
76- 82 F7.4 --- UR60 [1/2.22]?=-1 Uncertainty factor for stellar
reactivity at kT=60 keV (1)
84- 90 F7.4 --- UR80 [1/2.22]?=-1 Uncertainty factor for stellar
reactivity at kT=80 keV (1)
92- 98 F7.4 --- UR100 [1/2.21]?=-1 Uncertainty factor for stellar
reactivity at kT=100 keV (1)
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Note (1): "-1.0000" values indicate that no information is available
in KADoNiS v0.3 for this temperature.
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History:
From electronic version of the journal
29-Apr-2014: Insert into VizieR
18-Sep-2018: Table updated following erratum published
in 2018, ApJL, 864, L40
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 13-Mar-2014