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

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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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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Chemical Reaction Kinematics

Zeitschrift für Naturforschung A ◽

10.1515/zna-1968-1231 ◽

1968 ◽

Vol 23 (12) ◽

pp. 2080-2083 ◽

Cited By ~ 29

Author(s):

D. Hyatt ◽

K. Lacmann

Keyword(s):

Energy Range ◽

Cross Section ◽

Mass Spectrometer ◽

Cross Sections ◽

Impulse Approximation ◽

Reaction Cross ◽

Molecule Reaction ◽

Polarization Theory ◽

Reaction Cross Sections

A Bendix time of flight mass spectrometer has been modified to enable the determination of some ion-molecule reaction cross sections in the energy range 1 — 100 eV.In the reactions studiedX+ + D2 → XD++Dwhere X may be Ar, N2 or CO, the results obtained agree with the predictions of the polarization theory in the range below 10 eV despite the fact that no intermediate complex is formed at these energies. Between about 10—50 eV where spectator stripping occurs the cross section follows an approximate E-l dependence. Above these energies the results are consistent with a transition to a region in which knock-on processes predominate and where an impulse approximation treatment would be valid.

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