Tables of thermonuclear-reaction-rate data for neutron-induced reactions on heavy nuclei

Holmes, J. A.; Woosley, S. E.; Fowler, William A.; Zimmerman, Barbara A.

doi:10.1016/0092-640x(76)90011-5

Cited by 318 publications

(190 citation statements)

References 14 publications

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“…Parameterizations of the present rates in the form used in Holmes et al (1976) can be found in Appendices. The best fit was obtained by minimizing the deviation ζ (Eq.…”

Section: The Fits For Neutron-induced and Reverse Ratesmentioning

confidence: 99%

“…In the past, a series of efforts were applied to calculate neutron-capture rates for r-process nucleosynthesis and other astrophysical applications (e.g., Arnould 1972;Holmes et al 1976;Woosley et al 1978;Sargood 1982;Thielemann et al 1987;Cowan et al 1991;Rauscher & Thielemann 2000;Aikawa et al 2005;Goriely et al 2008, and references therein).…”

Section: Introductionmentioning

confidence: 99%

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Neutron-induced astrophysical reaction rates for translead nuclei

Panov

Korneev

Rauscher

et al. 2010

A&A

116

107

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Neutron-induced reaction rates, including fission and neutron capture, are calculated in the temperature range 10 8 ≤ T (K) ≤ 10 10 within the framework of the statistical model for targets with the atomic number 84 ≤ Z ≤ 118 (from Po to Uuo) from the neutron to the proton drip-line. Four sets of rates have been calculated, utilizing -where possible -consistent nuclear data for neutron separation energies and fission barriers from Thomas-Fermi (TF), Extended Thomas-Fermi plus Strutinsky Integral (ETFSI), Finite-Range Droplet Model (FRDM) and Hartree-Fock-Bogolyubov (HFB) predictions. Tables of calculated values as well as analytic seven parameter fits in the standard REACLIB format are supplied. We also discuss the sensitivity of the rates to the input, aiming at a better understanding of the variations introduced by the nuclear input.

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“…Parameterizations of the present rates in the form used in Holmes et al (1976) can be found in Appendices. The best fit was obtained by minimizing the deviation ζ (Eq.…”

Section: The Fits For Neutron-induced and Reverse Ratesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Neutron-induced astrophysical reaction rates for translead nuclei

Panov

Korneev

Rauscher

et al. 2010

A&A

116

107

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“…Combinations included two γ-strength function models: the generalized Lorentzian (GLO) of Ref. [13] and the double Lorentzian (DLO) of [14]; two level density models: RTK [21] and HWFZ [5]; and two optical potentials: the microscopic JLM [12] and the phenomenological equivalent square well (ESqW) [5,11]. Plotted in Fig.…”

Section: Nuclear Model Combinationsmentioning

confidence: 99%

“…It has long been known that the success of the statistical model depends sensitively on the details of these so called nuclear input models, specifically the details of the level density, optical model and γ-strength function models. It is generally accepted that over an energy range of 10 keV-10 MeV, the HF model is valid to within a factor of about 3 [4,5]. A frequent approach to improve on the reliability of the statistical model is to compare experimental data to HF calculations obtained with various combinations of nuclear input models, the hope being to test the applicability of a particular model or to identify successful model combinations.…”

Section: Introductionmentioning

confidence: 99%

Statistical Model Calculations for (n,γ) Reactions

Beard

Uberseder

Wiescher

2015

EPJ Web of Conferences

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Abstract. Hauser-Feshbach (HF) cross sections are of enormous importance for a wide range of applications, from waste transmutation and nuclear technologies, to medical applications, and nuclear astrophysics. It is a well-observed result that different nuclear input models sensitively affect HF cross section calculations. Less well known however are the effects on calculations originating from model-specific implementation details (such as level density parameter, matching energy, back-shift and giant dipole parameters), as well as effects from non-model aspects, such as experimental data truncation and transmission function energy binning. To investigate the effects or these various aspects, Maxwellian-averaged neutron capture cross sections have been calculated for approximately 340 nuclei. The relative effects of these model details will be discussed.

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“…For the HF model to be valid there needs to be sufficient level density such that the resonance spacing overlaps and the reaction can be described by averaged quantities. On the other hand, if the incident particle energy is too large the compound framework is no longer valid, preequilibrium and direct reactions start to contribute, and HF predictions cannot be applied [14][15][16]. There are numerous codes in the literature which have been designed to calculate statistical model cross sections.…”

Section: Introductionmentioning

confidence: 99%

Proton capture reaction cross section measurements on Er162 as a probe of statistical model calculations

et al. 2017

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It is crucial to measure reaction cross sections relevant to the astrophysical γ process so that theoretical reaction rates can be tested and validated with experimental data. The total cross sections for the 162 Er(p,γ ) 163 Tm and the 162 Er(p,n) 162 Tm reactions have been measured by the activation method in center-of-mass energies from 3.973 to 8.944 MeV and from 5.962 to 8.944 MeV, respectively. The nucleus 162 Er is the heaviest p nuclide to be measured by the activation method using γ -ray spectroscopy, so far. It is important to note that the energy range for the (p,γ ) reaction measurement covers a large fraction of the astrophysically relevant energy region between 2.71 and 5.34 MeV. The targets were prepared by evaporating 28.2% isotopically enriched 162 Er 2 O 3 powder onto carbon backing foils, and bombarded with proton beams provided by the FN Tandem Accelerator at the University of Notre Dame. The reaction yields have been determined by the observed activity of produced radioactive isotopes, which was detected offline by a high-purity germanium detector. The results are presented and compared with calculations from two statistical model codes: NON-SMOKER and TALYS.

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Tables of thermonuclear-reaction-rate data for neutron-induced reactions on heavy nuclei

Cited by 318 publications

References 14 publications

Neutron-induced astrophysical reaction rates for translead nuclei

Neutron-induced astrophysical reaction rates for translead nuclei

Statistical Model Calculations for (n,γ) Reactions

Proton capture reaction cross section measurements on Er162 as a probe of statistical model calculations

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