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| Description
| - Total radiative thermal neutron-capture gamma-ray cross sections for the W-182,W-183,W-184,W-186 isotopes were measured using guided neutron beams from the Budapest Research Reactor to induce prompt and delayed gamma rays from natural and isotopically-enriched tungsten targets. These cross sections were determined from the sum of measured gamma-ray cross sections feeding the ground state from low-lying levels below a cutoff energy, E-crit, where the level scheme is completely known, and continuum gamma rays from levels above E-crit, calculated using the Monte Carlo statistical-decay code DICEBOX. The new cross sections determined in this work for the tungsten nuclides are sigma(0)(W-182) = 20.5(14) b and sigma(11/2+) (W-183(m), 5.2 s) = 0.177(18) b; sigma(0)(W-183) = 9.37(38) b and sigma(5)-(W-184(m), 8.33 mu s) = 0.0247(55) b; sigma(0)(W-184) = 1.43(10) b and sigma(11/2+) (W-185(m), 1.67 min) = 0.0062(16) b; and, sigma(0)(W-186) = 33.33(62) b and sigma(9/2+) (W-187(m), 1.38 mu s) = 0.400(16) b. These results are consistent with earlier measurements in the literature. The W-186 cross section was also independently confirmed from an activation measurement, following the decay of W-187, yielding values for sigma(0)(W-186) that are consistent with our prompt gamma-ray measurement. The cross-section measurements were found to be insensitive to choice of level density or photon strength model and only weakly dependent on E-crit. Total radiative-capture widths calculated with DICEBOX showed much greater model dependence; however, the recommended values could be reproduced with selected model choices. The decay schemes for all tungsten isotopes were improved in these analyses. We were also able to determine new neutron-separation energies from our primary gamma-ray measurements for the respective (n,gamma) compounds: W-183 [S-n = 6190.88(6) keV]; W-184 [S-n = 7411.11(13) keV]; W-185 [S-n = 5753.74(5) keV]; and, W-187 [S-n = 5466.62(7) keV].
- Total radiative thermal neutron-capture gamma-ray cross sections for the W-182,W-183,W-184,W-186 isotopes were measured using guided neutron beams from the Budapest Research Reactor to induce prompt and delayed gamma rays from natural and isotopically-enriched tungsten targets. These cross sections were determined from the sum of measured gamma-ray cross sections feeding the ground state from low-lying levels below a cutoff energy, E-crit, where the level scheme is completely known, and continuum gamma rays from levels above E-crit, calculated using the Monte Carlo statistical-decay code DICEBOX. The new cross sections determined in this work for the tungsten nuclides are sigma(0)(W-182) = 20.5(14) b and sigma(11/2+) (W-183(m), 5.2 s) = 0.177(18) b; sigma(0)(W-183) = 9.37(38) b and sigma(5)-(W-184(m), 8.33 mu s) = 0.0247(55) b; sigma(0)(W-184) = 1.43(10) b and sigma(11/2+) (W-185(m), 1.67 min) = 0.0062(16) b; and, sigma(0)(W-186) = 33.33(62) b and sigma(9/2+) (W-187(m), 1.38 mu s) = 0.400(16) b. These results are consistent with earlier measurements in the literature. The W-186 cross section was also independently confirmed from an activation measurement, following the decay of W-187, yielding values for sigma(0)(W-186) that are consistent with our prompt gamma-ray measurement. The cross-section measurements were found to be insensitive to choice of level density or photon strength model and only weakly dependent on E-crit. Total radiative-capture widths calculated with DICEBOX showed much greater model dependence; however, the recommended values could be reproduced with selected model choices. The decay schemes for all tungsten isotopes were improved in these analyses. We were also able to determine new neutron-separation energies from our primary gamma-ray measurements for the respective (n,gamma) compounds: W-183 [S-n = 6190.88(6) keV]; W-184 [S-n = 7411.11(13) keV]; W-185 [S-n = 5753.74(5) keV]; and, W-187 [S-n = 5466.62(7) keV]. (en)
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| Title
| - Investigation of the tungsten isotopes via thermal neutron capture
- Investigation of the tungsten isotopes via thermal neutron capture (en)
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| skos:prefLabel
| - Investigation of the tungsten isotopes via thermal neutron capture
- Investigation of the tungsten isotopes via thermal neutron capture (en)
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| skos:notation
| - RIV/00216208:11320/14:10283700!RIV15-MSM-11320___
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/00216208:11320/14:10283700
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - states; strength; deformed-nuclei; gamma reaction; n; gamma)w-187 reaction; w-186(n; giant-resonance; cross-sections; budapest research reactor; gamma activation-analysis; nuclear-data sheets (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - US - Spojené státy americké
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Physical Review C - Nuclear Physics
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Krtička, Milan
- Firestone, R. B.
- Hurst, A. M.
- Sleaford, B. W.
- Belgya, T.
- Szentmiklosi, L.
- Basunia, M. S.
- Summers, N. C.
- Revay, Zs.
- Escher, J. E.
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| http://linked.open...ain/vavai/riv/wos
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| issn
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| number of pages
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| http://bibframe.org/vocab/doi
| - 10.1103/PhysRevC.89.014606
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| http://localhost/t...ganizacniJednotka
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