Calculated cross section for photoionization from the1πand3σorbitals of hydrogen fluoride

1981 ◽  
Vol 23 (1) ◽  
pp. 52-58 ◽  
Author(s):  
Knut Faegri ◽  
Hugh P. Kelly
Keyword(s):  
Cross Section ◽  
Hydrogen Fluoride ◽  
Calculated Cross Section

scholarly journals Nuclear Structure Investigations of some Medium-Weight Isotopes

2021 ◽  
Author(s):  
◽  
Gavin Wallace
Keyword(s):  
Nuclear Structure ◽  
Beta Decay ◽  
Cross Section ◽  
Gamma Rays ◽  
Half Life ◽  
Decay Scheme ◽  
Gamma Ray ◽  
Calculated Cross Section ◽  
Beta Spectrum ◽  
Gamma Ray Detectors

<p>This thesis describes the methods and results of investigations made to determine the decay schemes of three short-lived isotopes 112Ag, 114Ag and 116Ag. A total of 76 gamma-rays was observed with a Ge(Li) detector in the gamma-radiation which follows the Beta-decay of 112Ag to levels of 112Cd. gamma- gamma coincidence and angular correlation measurements were made with Ge(Li)-NaI(T1) and NaI(T1)-NaI(T1) systems. A decay scheme consistent with the present data is proposed. Cross sections for the reactions 112Cd(n,p)112Ag and 115In(n, alpha)112Ag were measured, and the half-life of the 112Ag decay was found to be 3.14 plus-minus 0.01 hr. The decay scheme of 114Ag was studied with Ge(Li) gamma-ray detectors and plastic Beta-ray detectors. 9 of the 11 gamma-rays observed in the decay were incorporated into 114Cd level structure previously determined by conversion electron measurements on the 113Cd(n,gamma)114Cd reaction. The endpoint energy of the Beta-decay was determined as 4.90 plus-minus 0.26 MeV; no branching was evident in the Beta-spectrum. A decay scheme is proposed for which the Beta-branching was deduced from the measured gamma-ray yield and a calculated cross section value for the 114Cd(n,p)114Ag reaction. The 114Ag half-life was determined as 4.52 plus-minus 0.03 sec; a search for a previously reported isomeric state of 114Ag was unsuccessful. Ge(Li) and NaI(T1) gamma-ray detectors were used to study the direct and coincidence spectra that result from the decay of 116Ag, the half-life of which was found to be 2.50 plus-minus 0.02 min. 53 gamma-rays were observed from this decay. The Beta-branching to the 17 excited states of 116Cd in the proposed decay scheme was derived from the measured gamma-ray yield and a calculated cross section value for the 116Cd(n,p)Ag reaction. Spin and parity assignments for ihe energy levels of 116Cd are made. An investigation of the applicability of two collective models to nuclear structure typical of the Cd nuclei studied demonstrated that one of the models was misleading when applied to vibrational nuclei. A potential function was developed in the other model to extend the investigation to include a study of the transition between extremes of collective motion. This was used to examine the correspondence between nuclear level schemes representative of rotational and vibrational excitations.</p>

Cross sections for the 26Mg(p,n)26gAl(7.3 × 105 yr) and 26Mg(p,n)26mAl(6.35 s) reactions

1979 ◽  
Vol 57 (2) ◽  
pp. 286-291 ◽  
Author(s):  
J. D. King ◽  
C. W. Cheng
Keyword(s):  
Energy Range ◽  
Cross Section ◽  
Cross Sections ◽  
Ground State ◽  
Proton Energy ◽  
Nuclear Model ◽  
Calculated Cross Section ◽  
Substantial Error ◽  
Order Of Magnitude ◽  
Carbon Burning

Cross sections for (p,n) reactions originating on 26Mg in its ground state and resulting in 26Al in either its 7.3 × 105 yr ground state or its 6.35 s 228 keV excited state have been calculated from a statistical compound nuclear model for the proton energy range from 4.8 to 7.0 MeV, which is of interest in nucleosynthesis due to explosive carbon burning in stars. The cross section for the 26Mg(p,n)26mAl(6.35 s) reaction has been measured over the proton energy range from 5 to 9.5 MeV and is found to be 2–4 times lower than the calculated cross section at overlapping energies. The calculated cross section for 26Mg(p,n)26gAl(7.3 × 105 yr) was found to be more than an order of magnitude greater than a measurement made previously at 6 MeV. These results suggest that cross sections calculated according to the statistical theory could introduce substantial error into any predictions involving the production of 26mAl or26gAl during a nucleosynthesis event.

scholarly journals NEUTRALINO–NUCLEON INTERACTION IN THE SPLIT SUSY SCENARIO OF THE DARK MATTER

2009 ◽  
Vol 24 (32) ◽  
pp. 6051-6069 ◽  
Author(s):  
R. S. PASECHNIK ◽  
V. A. BEYLIN ◽  
V. I. KUKSA ◽  
G. M. VERESHKOV
Keyword(s):  
Dark Matter ◽  
Cross Section ◽  
Calculated Cross Section ◽  
Nucleon Interaction ◽  
Nucleon Scattering ◽  
Decay Properties

The split SUSY scenario with light Higgsino states is treated as an application to the dark matter problem. We have considered the structure of the neutralino–nucleon interaction and calculated cross-section of the neutralino–nucleon scattering. The decay properties of the lightest chargino and next lightest neutralino are analyzed in details.

scholarly journals DEFORMATION ANALYSIS OF LAYERED REINFORCED CONCRETE - FOAM CONCRETE FLOOR SLABS

2020 ◽  
Vol 60 (4) ◽  
pp. 324-337
Author(s):  
Oksana Lytvyniak
Keyword(s):  
Reinforced Concrete ◽  
Cross Section ◽  
Strain State ◽  
Deformation Analysis ◽  
Calculated Cross Section ◽  
Foam Concrete ◽  
Deformation Method ◽  
Stress Strain ◽  
Stress Strain State ◽  
Floor Slabs

This article presents a theoretical study of a stress-strain state of layered reinforced concrete - foam concrete floor slabs (hereinafter called as the LRFCS), with the use of a deformation analysis. Compressive and tensile diagrams of the foam concrete, a tensile diagram of the reinforced concrete and compressive and tensile diagrams of the reinforcement rod are used for the estimation of the stress-strain state of the calculated cross-section of the LRFCS. It should be noted that this article presents the deformation method of loading by the scheme of pure bending for the LRFCS. This deformation method of loading is determined by six shapes of the stress-strain state. These shapes of the stress-strain state are represented by the corresponding distribution diagrams of the relative deformations and the distribution diagrams of internal stresses in the calculated cross-section of the floor slab. Also, this article presents the corresponding equilibrium equations of internal efforts and moments, which act in the calculated cross-section of the floor slab for all shapes of its stress-strain state. Consequently, the mentioned recommendations and mathematical dependencies allow to evaluate the stress-strain state of the LRFCS from its initial loading to its destruction.

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