Capture Cross Sections of Intermediate Neutrons

Murty, M Sriramachandra; Siddappa, K.; Rao, J. Rama

doi:10.1143/jpsj.35.8

Cited by 22 publications

(4 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this case, there exist only four sets of old measurements in the energy region from 2 to 200 keV. The present calculations are lower than JENDL-4.0 and JEFF-3.1.2 below several MeV, although they are in fair agreement with the measurements [38,39] at 24 keV within experimental uncertainties. However, as seen in Figure 5, the Maxwellian-averaged cross sections calculated from the present evaluation are consistent with the data measured by Rapp et al [40] at kT = 25 keV, while the calculations using JENDL-4.0 and JEFF-3.1.2 are larger than the measurement.…”

Section: Comparison With Experimental and Other Evaluated Data In Fassupporting

confidence: 62%

Evaluation of neutron nuclear data on ruthenium isotopes

Shibata

2013

Journal of Nuclear Science and Technology

View full text Add to dashboard Cite

Neutron nuclear data on 96,98,99,100,101,102,103,104,105,106 Ru have been evaluated for the next version of JENDL general-purpose file in the energy region from 10 −5 eV to 20 MeV. The thermal capture cross sections of 96,102 Ru were modified so as to reproduce the latest measured data. The statistical model was applied to calculate the cross sections above the resolved resonance region. In the calculations, coupled-channel optical-model parameters were used for neutrons. Preequilibrium and direct-reaction processes were taken into account in addition to the compound process. The present evaluation is consistent with available experimental data. The evaluated data are compiled into an ENDF-formatted data file.

show abstract

Section: Comparison With Experimental and Other Evaluated Data In Fassupporting

confidence: 62%

Evaluation of neutron nuclear data on ruthenium isotopes

Shibata

2013

Journal of Nuclear Science and Technology

View full text Add to dashboard Cite

show abstract

“…45 Two selected experimental datasets for the 100 Mo(c,n) 99 Mo reaction [125,127] thermal (seven studies) ~25 keV (nine studies) [ Fig. 46 Experimental datasets for the 98 Mo(n,c) 99 Mo reaction available in the literature , and the 75-group evaluation of TENDL-2017 [10] data points at a beam energy of approximately 25 keV relates to measurements in which Po-Be neutron sources were used [132,[136][137][138][139][140][141][142][143], and they are also denoted by a common symbol because of their significant overlap. A set of seven data points measured by Weston et al [145] over neutron energies from 2 to 100 keV were corrected (corr.)…”

Section: Momentioning

confidence: 99%

Recommended nuclear data for medical radioisotope production: diagnostic gamma emitters

Tárkányi

Ignatyuk

Hermanne

et al. 2018

J Radioanal Nucl Chem

View full text Add to dashboard Cite

An extensive series of evaluations have been performed as part of an IAEA coordinated research project to study a set of nuclear reactions that produce the diagnostic gamma-ray emitting radionuclides 51 Cr, 99m Tc, 111 In, 123 I and 201 Tl. Recommended cross-section data in the form of excitation functions have been derived, along with quantifications of their uncertainties. These evaluations involved the compilation of all previously published values and newly measured experimental data, followed by critical assessments and selection of those experimental datasets and accompanying uncertainties judged to be fully valid and statistically consistent for model-independent least-squares fitting by means of Padé approximations. Integral yields as a function of the energy were also calculated on the basis of the recommended cross sections deduced from these various fits. All evaluated numerical results and their corresponding uncertainties are available online at www-nds.iaea.org/medical/gamma_emitters.html and also on the medical portal of the International Atomic Energy Agency/Nuclear Data Section (IAEA-NDS) www-nds.iaea.org/medportal/.

show abstract

“…[107]; (d) 80 Se(n,γ), data from Refs. [99,[107][108][109]; (e) 82 Se(n,γ), data from Refs. [98,107].…”

Section: Microscopic Calculations Within the Quasi-particlementioning

confidence: 99%

“…[71, 77- 80, 82, 83, 100-106]; (c)78 Se(n,γ), data from Ref [107]80 Se(n,γ), data from Refs [99,[107][108][109]82 Se(n,γ), data from Refs [98,107]…”

mentioning

confidence: 99%

Uncertainties in radiative neutron-capture rates relevant to the $A\sim 80$ $r$-process peak

Kullmann¹,

Lima²,

Larsen³

et al. 2018

Preprint

View full text Add to dashboard Cite

The rapid neutron-capture process (r-process) has for the first time been confirmed to take place in a neutronstar merger event. A detailed understanding of the rapid neutron-capture process is one of the holy grails in nuclear astrophysics. In this work we investigate one aspect of the r-process modelling: uncertainties in radiative neutron-capture cross sections and astrophysical reaction rates for isotopes of the elements Fe, Co, Ni, Cu, Zn, Ga, Ge, As, and Se. In particular, we study deviations from standard libraries used for astrophysics, and the influence of a very-low γ-energy enhancement in the average, reduced γ-decay probability on the (n, γ) rates. We find that the intrinsic uncertainties are in some cases extremely large, and that the low-energy enhancement, if present in neutron-rich nuclei, may increase the neutron-capture reaction rate significantly.

show abstract

Capture Cross Sections of Intermediate Neutrons

Cited by 22 publications

References 11 publications

Evaluation of neutron nuclear data on ruthenium isotopes

Evaluation of neutron nuclear data on ruthenium isotopes

Recommended nuclear data for medical radioisotope production: diagnostic gamma emitters

Uncertainties in radiative neutron-capture rates relevant to the $A\sim 80$ $r$-process peak

Contact Info

Product

Resources

About