Capture cross-section measurements of some medium- and heavy-weight nuclei in the keV region

Kompe, D.

doi:10.1016/0375-9474(69)90552-1

Cited by 44 publications

(5 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The first total absorption detectors were large liquid (organic) scintillation tanks [163][164][165][166][167] covering a solid angle of almost 4π, however, with a very poor γ-ray energy resolution and a relatively modest time resolution limited to about 5 ns. Due to their size, they suffer from a large natural background and they have an intrinsically high neutron sensitivity due to neutron capture in hydrogen.…”

Section: Total Absorptionmentioning

confidence: 99%

“…An upper limit on the energy deposition is imposed to reduce the background from high energy cosmic rays. The contribution of neutrons captured in the detector can be limited by lining the inside of the detector with a material containing 6 Li or by loading the liquid with boron [164][165][166][167], together with a lower discrimination threshold of about 500 keV to reject the low energy γ-rays caused by neutron absorption in 10 B. Unfortunately such liners are only effective for low energy neutrons.…”

Section: Total Absorptionmentioning

confidence: 99%

“…To correct for the fraction in the spectrum that is lost due to the lower discriminator level an extrapolation to zero level is applied. Even after correction for the overall loss in detection efficiency, the accuracy of these systems is limited to 5% -10% and depends strongly on the reaction under study [165,167].…”

Section: Total Absorptionmentioning

confidence: 99%

See 2 more Smart Citations

Determination of Resonance Parameters and their Covariances from Neutron Induced Reaction Cross Section Data

Schillebeeckx

Becker

Danon

et al. 2012

Nuclear Data Sheets

119

142

View full text Add to dashboard Cite

Section: Total Absorptionmentioning

confidence: 99%

Section: Total Absorptionmentioning

confidence: 99%

See 1 more Smart Citation

Determination of Resonance Parameters and their Covariances from Neutron Induced Reaction Cross Section Data

Schillebeeckx

Becker

Danon

et al. 2012

Nuclear Data Sheets

119

142

View full text Add to dashboard Cite

“…在核装置设计中, 加速器的驱动次临界系统设计同样需要准确的反应截面数据 [1] . 在核天体物理中, 所有比铁重的核素(A > 56)均由天体间的S过程和R过程生成, 中子辐射俘获截面作为研究该过程的重要输入参数, 对星系演化、元素丰度等目前具有分歧的研究问题起着关键作用 [2] . 因此, 实现高精确度的中子辐射俘获反应截面数据测量对核物理研究及核能应用具有重要意义.…”

Section: 引言unclassified

Neutron capture reaction cross-section data processing and resonance parameter analysis of 197Au based on white light neutron source

Luo,

Zhang,

Luan

et al. 2024

Acta Phys. Sin.

View full text Add to dashboard Cite

The neutron capture reaction plays an important role in reactor operation, nuclear device design, and nuclear astrophysics research. Neutron capture reaction is one of the neutron reactions that plays an important role in the use of reactor control rods and shell materials, the design of nuclear device structures, and the study of nuclear astrophysics S processes and element origins. The 4π BaF2 detection device has advantages such as high time resolution, low neutron sensitivity, and high detection efficiency, making it suitable for measuring neutron radiation capture reaction cross-section data. In order to fill the gap in domestic neutron capture reaction data in the keV energy range and improve the accuracy of Chinese nuclear data, the Key Laboratory of Nuclear Data at the Chinese Institute of Atomic Energy (CIAE) has established a Gamma Total Absorption Facility (GTAF), which consists of 28 hexagonal BaF2 crystals and 12 pentagonal BaF2 crystals to form a spherical shell with an outer diameter of 25cm and an inner diameter of 10cm, covering 95.2% of the solid angles. The Back-n beam line of the Chinese Spallation Neutron Source (CSNS) is a back-streaming white beam line that covers neutron energy ranging from a few eV to several hundred MeV, making it suitable for measuring neutron capture cross-sections. The reaction cross-section data of 197Au was measured using GTAF on the Back-n beam line. The measurement data was preliminarily background deducted through energy screening, PSD method, and crystal multiplicity screening. Subsequently, the background was analyzed and deducted based on the measurement data of natC and empty samples, and the yield of 197Au capture reaction was obtained. Resonance parameters are a set of parameters extracted from experimental data to describe the resonance curve, which can eliminate the influence of experimental conditions on resonance data and are more important than the cross-section obtained from experiments. The resonance energy, neutron resonance width, and gamma resonance width parameters of 197Au at 1-100eV were fitted using the SAMMY program. Comparing the resonance curves obtained from experimental measurements and the resonance parameters obtained from fitting with the ENDF/B-VIII.0 database, it can be found that the experimental measurement results are in good agreement with the database, and there are certain differences in the resonance parameters. The analysis of the reasons may be related to the GTAF energy resolution, Back-n neutron spectrum measurement accuracy, and the experimental background deduction method, which is also the focus of the next step of work.

show abstract

“…The results of 33 experiments have been analysed. A part of the experimental data ( [13][14][15], [17,18], [21], [23], [26], [28][29][30], [35][36][37][38]) was corrected to new recommended monitor reaction cross-sections and decay data. For some data, special corrections were introduced.…”

Section: The Experimental Data Basementioning

confidence: 99%

Evaluation of the⁹³Nb(n,γ) Reaction Cross-Section

Zolotarev

Badikov

2016

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. New evaluation of the 93 Nb(n, ) 94 Nb reaction cross-section important for retrospective reactor dosimetry was carried out. At neutron energies below 7.5 keV the evaluation is based on the experimental data. The results of measurements extracted from the EXFOR library were corrected (when necessary) to new recommended values of monitor reaction cross-sections and decay data. The resonance analysis of the 93 Nb(n, ) and the 93 Nb(n,tot) reaction cross-sections was carried out within the Reich-Moore formalism. 48 new resonances were identified as compared to the Mughabghab systematics. In the energy range from 7.5 keV to 20 MeV the evaluation is based on the experimental data and theoretical model calculations. The recommended cross-sections and their covariances in this energy range were evaluated by an approximation of the experimental and calculated values with the PADE2 code. The new evaluation provides, essentially, better agreement with the experimental data and the recommended value of the resonance integral compared to other evaluations.

show abstract

Capture cross-section measurements of some medium- and heavy-weight nuclei in the keV region

Abstract: Institut für Angewandte Kernphysik Capture Cross-Section MeaE•urements of Some Medium-and HeavyWeight Nuclei in the keV Region D.

Cited by 44 publications

References 25 publications

Determination of Resonance Parameters and their Covariances from Neutron Induced Reaction Cross Section Data

Determination of Resonance Parameters and their Covariances from Neutron Induced Reaction Cross Section Data

Neutron capture reaction cross-section data processing and resonance parameter analysis of <sup>197</sup>Au based on white light neutron source

Evaluation of the⁹³Nb(n,γ) Reaction Cross-Section

Contact Info

Product

Resources

About

Capture cross-section measurements of some medium- and heavy-weight nuclei in the keV region

Abstract: Institut für Angewandte Kernphysik Capture Cross-Section MeaE•urements of Some Medium-and HeavyWeight Nuclei in the keV Region D.

Cited by 44 publications

References 25 publications

Determination of Resonance Parameters and their Covariances from Neutron Induced Reaction Cross Section Data

Determination of Resonance Parameters and their Covariances from Neutron Induced Reaction Cross Section Data

Neutron capture reaction cross-section data processing and resonance parameter analysis of <sup>197</sup>Au based on white light neutron source

Evaluation of the93Nb(n,γ) Reaction Cross-Section

Contact Info

Product

Resources

About

Evaluation of the⁹³Nb(n,γ) Reaction Cross-Section