Deposits of clastic carbonate-dominated (calciclastic) sedimentary slope systems in the rock record have been identified mostly as linearly-consistent carbonate apron deposits, even though most ancient clastic carbonate slope deposits fit the submarine fan systems better. Calciclastic submarine fans are consequently rarely described and are poorly understood. Subsequently, very little is known especially in mud-dominated calciclastic submarine fan systems. Presented in this study are a sedimentological core and petrographic characterisation of samples from eleven boreholes from the Lower Carboniferous of Bowland Basin (Northwest England) that reveals a >250 m thick calciturbidite complex deposited in a calciclastic submarine fan setting. Seven facies are recognised from core and thin section characterisation and are grouped into three carbonate turbidite sequences. They include: 1) Calciturbidites, comprising mostly of highto low-density, wavy-laminated bioclast-rich facies; 2) low-density densite mudstones which are characterised by planar laminated and unlaminated muddominated facies; and 3) Calcidebrites which are muddy or hyper-concentrated debrisflow deposits occurring as poorly-sorted, chaotic, mud-supported floatstones. These

Phd by thesis

This paper describes the contents of the 2016 edition of the HITRAN molecular spectroscopic compilation. The new edition replaces the previous HITRAN edition of 2012 and its updates during the intervening years. The HITRAN molecular absorption compilation is composed of five major components: the traditional line-by-line spectroscopic parameters required for high-resolution radiative-transfer codes, infrared absorption cross-sections for molecules not yet amenable to representation in a line-by-line form, collision-induced absorption data, aerosol indices of refraction, and general tables such as partition sums that apply globally to the data. The new HITRAN is greatly extended in terms of accuracy, spectral coverage, additional absorption phenomena, added line-shape formalisms, and validity. Moreover, molecules, isotopologues, and perturbing gases have been added that address the issues of atmospheres beyond the Earth. Of considerable note, experimental IR cross-sections for almost 300 additional molecules important in different areas of atmospheric science have been added to the database. The compilation can be accessed through www.hitran.org. Most of the HITRAN data have now been cast into an underlying relational database structure that offers many advantages over the long-standing sequential text-based structure. The new structure empowers the user in many ways. It enables the incorporation of an extended set of fundamental parameters per transition, sophisticated line-shape formalisms, easy user-defined output formats, and very convenient searching, filtering, and plotting of data. A powerful application programming interface making use of structured query language (SQL) features for higher-level applications of HITRAN is also provided.

/pdf/the-hitran-2008-molecular-spectroscopic-database-1ud8clpej3.pdf

The HITRAN 2008 molecular spectroscopic database

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Table Of Integrals Series And Products

Tables of integrals

Climate Change 1995 is a scientific assessment that was generated by more than 1 000 contributors from over 50 nations. It was jointly co-ordinated through two international agencies; the World Meteorological Organization and the United Nations Environment Programme. The assessment was completed by the Intergovernmental Panel on Climate Change (IPCC) with a primary aim of reviewing the current state of knowledge concerning the impacts of climate change on physical and ecological systems, human health, and socioeconomic factors. The second aim was to review the available information on the technical and economic feasibility of the potential mitigation and adaptation strategies.

Climate Change 1995

In this paper, we report modified calculations for total elastic, total ionization and total (complete) cross sections for boron trifluoride (BF3) and boron trichloride (BCl3) upon electron impact at energies from around threshold to 2000 eV. We have proposed a model which allows screening correction due to the overlapping of atoms as seen by incident electrons in a complex molecule. We have employed the well-known spherical complex optical potential (SCOP) formalism to evaluate total elastic and total inelastic cross sections and hence total (complete) cross sections. The ionization cross sections were derived using the complex optical potential–ionization contribution (CSP-ic) method developed by us. The present results are compared with available experimental and other theoretical data wherever available and overall good agreement is observed. The present screening-corrected model shows improvement over the previous method especially at low energies. We also predict total elastic cross sections for these targets using this method.

https://iopscience.iop.org/article/10.1088/0953-4075/41/24/245202/pdf

Screening-corrected electron impact total and ionization cross sections for boron trifluoride (BF3) and boron trichloride (BCl3)

A theoretical formalism is introduced in this article to calculate the total cross sections for positron scattering. This method incorporates positron–target interaction in the spherical complex optical potential formalism. The study of positron collision has been quite subtle until now. However, recently, it has emerged as an interesting area due to its role in atomic and molecular structure physics, astrophysics, and medicine. With the present method, the total cross sections for simple atoms C, N, and O and their diatomic molecules C2, N2, and O2 are obtained and compared with existing data. The total cross section obtained in the present work gives a more consistent shape and magnitude than existing theories. The characteristic dip below 10 eV is identified due to the positronium formation. The deviation of the present cross section with measurements at energies below 10 eV is attributed to the neglect of forward angle-discrimination effects in experiments, the inefficiency of additivity rule for mole...

Theoretical Formalism To Estimate the Positron Scattering Cross Section

Theoretical study of electron impact scattering by disilane molecule is reported in this article. Total, elastic, excitation and differential cross sections were computed at low incident energies using the R-matrix method through QUANTEMOL-N. The total cross section calculation was extended to higher energies using spherical complex optical potential formalism. The smooth transition at the overlap of two formalisms around the ionization threshold of the target has helped to predict cross sections over a wide energy range from 0.1 eV to 5 keV. The resonance position predicted by the present static exchange and static exchange plus polarization models at 3.3 and 3.0 eV respectively agrees quite well with previous theoretical and experimental results. The inclusion of polarization effects in the calculation has considerably improved the position of the resonance from the previous static exchange calculation. In general the results obtained for total, elastic and differential cross sections show reasonable agreement with the experiment. The excitation cross section of disilane from ground state to various excited states is reported for the first time.

Electron induced chemistry of disilane

In this article, we have reported electron impact total ionisation cross sections for the bio-molecules pyridine, pyrimidine, n-propylamine, urea, formamide and N-methylformamide from ionisation threshold to 2000 eV The present calculations are based on the spherical complex optical potential formalism and complex scattering potential ionisation contribution method The results obtained for pyridine and pyrimidine are compared with available theoretical and experimental results and are found to be in excellent agreement with existing data The ionisation cross sections for other molecules are reported for the first time An interesting relation between the peak of inelastic and ionisation cross sections with target parameters is also reported It was found that both the cross sections at their maximum depend linearly with these parameters, confirming the consistency of the values reported here

Electron impact total ionisation cross sections for simple bio-molecules: a theoretical approach

A comprehensive calculation of electron impact scattering by NF${}_{3}$ molecule is reported in this article. Total cross sections were presented over electron impact energies from 1 eV to 5 keV. The ab initio R-matrix method was employed through QUANTEMOL-N software for low-energy calculations and spherical complex optical potential formalism for intermediate to high-energy calculations. The consistency of data at the overlapping energy (\ensuremath{\sim}14 eV) from these theories allows us to predict total cross sections for such an extensive energy range. Electronic excitation, rotational excitation, and differential cross sections were calculated using the $R$-matrix method at low incident energies. In the present study, resonances were detected at 5.6 and 6.2 eV, indicating the probability of anions formation by the electron attachment process and further decay to neutral and negative ion fragments. In general, the present results show overall agreement with previous theories and experiments, wherever available. A maiden attempt to calculate $e$-NF${}_{3}$ rotational excitation cross sections is also undertaken.

Bobby Antony

Papers

Screening-corrected electron impact total and ionization cross sections for boron trifluoride (BF3) and boron trichloride (BCl3)

Theoretical Formalism To Estimate the Positron Scattering Cross Section

Electron induced chemistry of disilane

Electron impact total ionisation cross sections for simple bio-molecules: a theoretical approach

Cross sections for electron collisions with NF 3