Investigation of excited states of11B and7Li by means of thermal neutron capture on10B nuclei

Kok, P.; Haas, J.; Abrahams, K.; Postma, H.; Huiskamp, W.J.

doi:10.1007/bf01294580

Cited by 2 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The transition probabilities were fit to the level scheme with a χ 2 /f=1.4. In Table XI we have averaged our transition energies and intensities with the previously published data of Kok et al [38]. The neutron separation energy determine in our work, S n =11454.02±0.10 keV, is in excellent agreement with the adopted value, S n =11454.12±0.16 keV [10].…”

Section: E 10 B Cross Sectionsupporting

confidence: 74%

See 1 more Smart Citation

Thermal neutron radiative cross sections forLi6,7,Be9,
Firestone
¹
,
Révay
²

2016
Phys. Rev. C

View full text Add to dashboard Cite

Total thermal radiative neutron cross sections have been measured on natural and enriched isotopic targets containing 6,7 Li, 9 Be, 10,11 B, 12,13 C, and 14,15 N with neutron beams from the Budapest Reactor. Complete neutron capture γ-ray decay schemes were measured for each isotope. Absolute transition probabilities have been determined by a least-squares fit of the transition intensities, corrected for internal conversion, to the (n,γ) decay schemes. The γ-ray cross sections were standardized using stoichiometric compounds containing both the isotope of interest and another element whose γ-ray cross sections are well known. Total cross sections, σ0, were then determined for each isotope from the γ-ray cross sections and transition probabilities. For the 11 B(n,γ) 12 B reaction decay transition probabilities were determined for the γ-rays from 12 B (t 1/2 =20.20 ms) β − -decay.

show abstract

Section: E 10 B Cross Sectionsupporting

confidence: 74%

“…Eγ ( (9) 256 (8) 255 (20) determined by Kok et al [38] (290±40 mb) and the recommended value of Mughabghab [16] (305±16 mb).…”

Section: E 10 B Cross Sectionmentioning

confidence: 99%

Thermal neutron radiative cross sections forLi6,7,Be9,
Firestone
¹
,
Révay
²

2016
Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…The error bars represent statistical uncertainty of the fit of the centroids. 52.279 • ± 0.018 • . The silicon lattice spacing a = (0.5431020504 ± 0.000000087) nm [42] is known to a relative precision of 1.6 × 10 −8 , and thus the (111) spacing is given by…”

Section: Measurement Of the Neutron Wavelengthmentioning

confidence: 97%

“…What is not accounted for is the neutron loss due to this channel. The correction is calculated in a straightforward manner using the measured cross section for the 10 B(n, γ) 11 B [56][57][58]. Taking a weighted mean of the cross section and comparing it to the 10 B(n, γ) 7 Li cross section, it is seen that radiative capture absorbs 0.000 10 ± 0.000 004 of the neu trons.…”

Section: Collimationmentioning

confidence: 99%

Precision determination of absolute neutron flux

et al. 2018

View full text Add to dashboard Cite

A technique for establishing the total neutron rate of a highly-collimated monochromatic cold neutron beam was demonstrated using an alpha–gamma counter. The method involves only the counting of measured rates and is independent of neutron cross sections, decay chain branching ratios, and neutron beam energy. For the measurement, a target of 10B-enriched boron carbide totally absorbed the neutrons in a monochromatic beam, and the rate of absorbed neutrons was determined by counting 478 keV gamma rays from neutron capture on 10B with calibrated high-purity germanium detectors. A second measurement based on Bragg diffraction from a perfect silicon crystal was performed to determine the mean de Broglie wavelength of the beam to a precision of 0.024%. With these measurements, the detection efficiency of a neutron monitor based on neutron absorption on 6Li was determined to an overall uncertainty of 0.058%. We discuss the principle of the alpha–gamma method and present details of how the measurement was performed including the systematic effects. We also describe how this method may be used for applications in neutron dosimetry and metrology, fundamental neutron physics, and neutron cross section measurements.

show abstract

Investigation of excited states of11B and7Li by means of thermal neutron capture on10B nuclei

Cited by 2 publications

References 17 publications

Thermal neutron radiative cross sections forLi6,7,Be9,
Firestone
¹
,
Révay
²

2016
Phys. Rev. C

Thermal neutron radiative cross sections forLi6,7,Be9,
Firestone
¹
,
Révay
²

2016
Phys. Rev. C

Precision determination of absolute neutron flux

Contact Info

Product

Resources

About

Investigation of excited states of11B and7Li by means of thermal neutron capture on10B nuclei

Cited by 2 publications

References 17 publications

Thermal neutron radiative cross sections forLi6,7,Be9,Firestone1, Révay2 2016Phys. Rev. C

Thermal neutron radiative cross sections forLi6,7,Be9,Firestone1, Révay2 2016Phys. Rev. C

Precision determination of absolute neutron flux

Contact Info

Product

Resources

About

Thermal neutron radiative cross sections forLi6,7,Be9,
Firestone
¹
,
Révay
²

2016
Phys. Rev. C

Thermal neutron radiative cross sections forLi6,7,Be9,
Firestone
¹
,
Révay
²

2016
Phys. Rev. C