Tc92andTc93by Relative Cross-Section Measurements

ABSTRACTOptical and photoelectron spectroscopies using VUV and Soft X-ray photons are powerful tools for studies of elemental and compound actinides. Large changes in the relative atomic cross sections of the 5f, 6d and sp electrons allow decomposition of the character of the valence bands using photoemission. Resonant enhancement of photoelectrons and Auger electrons at the 5d core threshold further aids the decomposition and gives a measure of elemental specificity. Angle-resolved photoemission can be used to map the momentum dependence of the electronic states. The large changes in relative cross section with photon energy yields further details when the mapping is done at equivalent points in multiple zones. Spectra for well understood rare earth materials will be presented to establish spectral characteristics for known atomic character initial states. These signatures will be applied to the case of USb to investigate f-d hybridization near the Fermi level.

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Internal-energy-selected measurements on the relative cross section of the ion-molecule reaction NH3+(NH3, NH2)NH4+

Chemical Physics ◽

10.1016/0301-0104(85)80168-3 ◽

1985 ◽

Vol 95 (3) ◽

pp. 449-457 ◽

Cited By ~ 13

Author(s):

D. van Pijkeren ◽

J. van Eck ◽

A. Niehaus

Keyword(s):

Internal Energy ◽

Cross Section ◽

Molecule Reaction ◽

Relative Cross Section

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The use of probiotics versus psyllium husk as a bowel preparation for prostate radiotherapy: a retrospective analysis

Journal of Radiotherapy in Practice ◽

10.1017/s1460396915000254 ◽

2015 ◽

Vol 14 (4) ◽

pp. 378-384 ◽

Cited By ~ 1

Author(s):

Daniel G. Hamilton ◽

Dean McKenzie ◽

Jason Wasiak ◽

Paul Fenton

Keyword(s):

Retrospective Analysis ◽

Cross Section ◽

Bowel Preparation ◽

Retrospective Chart Review ◽

Prostate Radiotherapy ◽

Cross Section Area ◽

Psyllium Husk ◽

Section Area ◽

Relative Cross Section ◽

Rectal Volume

AbstractIntroductionThe use of bowel preparation strategies to reduce the degree of rectal distension during prostate radiotherapy is well documented. This retrospective pilot study analysed and compared a probiotic agent against a psyllium-supplemented diet to establish the feasibility of probiotics as a bowel preparation for patients receiving radical radiotherapy for prostate cancer.MethodA retrospective chart review of five patients taking probiotics and five taking psyllium husk (psyllium) during their course of radiotherapy treatment was conducted. On treatment, cone beam computed tomography (CBCT) scans were compared with planning CTs to quantify inter-fractional variation in rectal volume and distension.ResultsForty-five CBCT scans were available in both the psyllium and probiotics groups for analysis. Variation in mean difference in rectal volume from planning (ΔRV), mean rectal cross-section area (CSA) and mean relative cross-section area (CSArel) was significantly increased for the probiotics group compared with the psyllium group (p=0·001, 0·008 and 0·007, respectively). No statistically significant differences in mean ΔRV, CSA and CSArel were detected between the two groups.ConclusionThis retrospective analysis suggests that a probiotics-based bowel preparation that utilises Lactobacillus acidophilus and Bifidobacterium lactis may result in increased rectal volume and CSA variation throughout treatment in comparison with a psyllium-supplemented diet.

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Determination of the fast-neutron-induced fission cross-section of 242Pu at nELBE

EPJ Web of Conferences ◽

10.1051/epjconf/201816900009 ◽

2018 ◽

Vol 169 ◽

pp. 00009

Author(s):

Toni Kögler ◽

Roland Beyer ◽

Arnd R. Junghans ◽

Ronald Schwengner ◽

Andreas Wagner

Keyword(s):

Fast Neutron ◽

Cross Section ◽

Neutron Transport ◽

Fission Cross Section ◽

Data Sets ◽

Fission Rate ◽

Relative Cross Section ◽

Neutron Time ◽

Induced Fission

The fast-neutron-induced fission cross section of 242Pu was determined in the energy range of 0.5 MeV to 10MeV at the neutron time-of-flight facility nELBE. Using a parallel-plate fission ionization chamber this quantity was measured relative to 235U(n,f). The number of target nuclei was thereby calculated by means of measuring the spontaneous fission rate of 242Pu. An MCNP 6 neutron transport simulation was used to correct the relative cross section for neutron scattering. The determined results are in good agreement with current experimental and evaluated data sets.

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Photoionisation spectrum of Te I: autoionising series and relative cross section

Journal of Physics B Atomic and Molecular Physics ◽

10.1088/0022-3700/16/17/011 ◽

1983 ◽

Vol 16 (17) ◽

pp. 3183-3190 ◽

Cited By ~ 8

Author(s):

M Mazzoni ◽

A M Cantu ◽

Y N Joshi

Keyword(s):

Cross Section ◽

Relative Cross Section

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The relative cross section for Ba++ and Ba+ ions from Ba atoms with helium and neon resonance photons

International Journal of Mass Spectrometry and Ion Physics ◽

10.1016/0020-7381(74)80043-4 ◽

1974 ◽

Vol 15 (4) ◽

pp. 463-464 ◽

Cited By ~ 24

Author(s):

B. Brehm ◽

A. Bucher

Keyword(s):

Cross Section ◽

Relative Cross Section

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Engineering assessment of minimum fatigue life for given probability of its non-exceedance

TRANSACTIONS OF THE KRYLOV STATE RESEARCH CENTRE ◽

10.24937/2542-2324-2021-1-395-55-64 ◽

2021 ◽

Vol 1 (395) ◽

pp. 55-64

Author(s):

K. Proskuryakov ◽

◽

O. Shagniev ◽

A. Shkadova ◽

◽

...

Keyword(s):

Fatigue Life ◽

Cross Section ◽

Analytical Formula ◽

Structural Materials ◽

Statistical Simulation ◽

Life Distribution ◽

Relative Cross Section ◽

Number Of Cycles ◽

Temporary Resistance ◽

Cycles To Failure

Object and purpose of research. This paper discusses structural materials under cyclic load. The purpose is to determine the minimum fatigue life corresponding to a certain non-exceedance probability of this value. Materials and methods. The study was performed on three structural materials: steel 15ХМ, steel 08Kh18N10Т and titanium alloy PТ-7М. Initial estimate of fatigue life distribution parameters relied on the data about guaranteed maximum and minimum values of temporary resistance and relative cross-section tapering. The assessment was performed as per a common curve “conditionally elastic stress amplitude versus number of cycles to failure” taking into account the mechanical prop-erties of given material. The values of minimum fatigue life were obtained as per two different methods: statistical simulation of the random values following the Weibull distribution law and the analytical expression for probability density of the lows for given distribution function of random value and fixed scope of sampling. Main results. The lows yielded by statistical simulation are more conservative than those yielded by the analytical formula. The margin in terms of the number of cycles to failure stipulated as 10 in several regulatory documents seems to be somewhat unsubstantiated. This margin is too great in the low-cycle domain and too small in the high-cycle one. Conclusion. This paper postulates the existence of guaranteed maximum and minimum values for mechanical properties of structural materials, namely temporary resistance and relative cross-section tapering. These values were applied to well-known analytical curves of fatigue, which finally yielded possible variation ranges for fatigue life at various amplitudes of conditionally elastic reduced stresses, assuming the existence of a certain shift in the sensitivity limit of fatigue life distribution. These data were further used to establish standard deviations and mathematical expectations for the number of cycles to failure.

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