scholarly journals Deuterium target data for precision neutrino-nucleus cross sections

2016 ◽  
Vol 93 (11) ◽  
Author(s):  
Aaron S. Meyer ◽  
Minerba Betancourt ◽  
Richard Gran ◽  
Richard J. Hill
Keyword(s):  
Cross Sections ◽  
Deuterium Target ◽  
Target Data

PROTON-DEUTERON BREAK-UP MEASUREMENTS WITH BINA AT 135 MeV

2009 ◽  
Vol 24 (11n13) ◽  
pp. 839-842 ◽  
Author(s):  
M. ESLAMI-KALANTARI ◽  
H. R. AMIR-AHMADI ◽  
A. BIEGUN ◽  
I. GAŠPARIĆ ◽  
L. JOULAEIZADEH ◽  
...  
Keyword(s):  
Cross Sections ◽  
Nuclear Polarization ◽  
State Of The Art ◽  
Precision Measurements ◽  
Nucleon Force ◽  
Analyzing Powers ◽  
The Past ◽  
Deuterium Target ◽  
Polarized Proton ◽  
Break Up

High-precision measurements of the proton-deuteron elastic and break-up reaction have been performed in the past at KVI and elsewhere with the aim to study three-nucleon force (3NF) effects. In the present work, we explored 3NF effects in the break-up scattering process by performing a measurement of vector analyzing powers and differential cross sections using a 135 MeV polarized-proton beam impinging on a liquid-deuterium target. For this study, we used a new experimental setup, Big Instrument for Nuclear-polarization Analysis, BINA, which covers almost the entire kinematical phase space of the break-up reaction. The results are interpreted with the help of state-of-the-art Faddeev calculations.

THE NEAR-THRESHOLD PRODUCTION OF ϕ-MESONS IN PROTON–NUCLEON COLLISIONS

2007 ◽  
Vol 22 (02n03) ◽  
pp. 317-324 ◽  
Author(s):  
◽  
M. Hartmann ◽  
Y. Maeda ◽  
I. Keshelashvili ◽  
S. Barsov ◽  
...  
Keyword(s):  
Energy Dependence ◽  
Cross Section ◽  
Cross Sections ◽  
Entrance Channel ◽  
Significant Enhancement ◽  
Total Cross Sections ◽  
Deuterium Target ◽  
The Cross ◽  
Near Threshold

The pp → ppϕ and quasi–free pn → dϕ reactions have been studied at the Cooler Synchrotron COSY–Jülich, using the internal beam and the ANKE facility. Total cross sections in the pp entrance channel have been determined at three excess energies ∊ in the range of 18.5–75.9 MeV. In case of the pn entrance channel the energy dependence of the cross section up to 80 MeV has been extracted by exploiting the intrinsic momentum of the neutron inside a deuterium target. Taken together with data for ω–production, a significant enhancement of the ϕ/ω ratio for both entrance channels of a factor 8 is found compared to predictions based on the Okubo–Zweig–Iizuka rule.

HYPERON PRODUCTION AND POLARIZATION WITH CLAS AND CLAS12 AT JLAB

2010 ◽  
Vol 19 (05n06) ◽  
pp. 1021-1030 ◽  
Author(s):  
◽  
SERGIO ANEFALOS PEREIRA
Keyword(s):  
Cross Sections ◽  
Resonance Problem ◽  
Future Perspectives ◽  
Hyperon Production ◽  
Preliminary Results ◽  
Spin Observables ◽  
Deuterium Target ◽  
Linearly Polarized ◽  
Baryon Resonances ◽  
Comprehensive Study

Many baryon resonances are predicted studying the channels with π, but very few established. This is the so-called "missing resonance" problem. It is important to provide data to investigate the spectrum of baryon ( N * and Δ) resonances, with the decay in KY. A comprehensive study of the electromagnetic strangeness production has been undertaken at Jefferson Lab using circularly and linearly polarized photon beam and polarized hydrogen and deuterium target. Recent results in strangeness photoproduction on protons, including cross sections and spin observables, are discussed in this paper, as well preliminary results on photoproduction on bound neutron. Also an overview of the future perspectives for the 12 GeV upgrade.

scholarly journals PRODUCTION AND SEARCHES FOR CASCADE BARYONS WITH CLAS

2010 ◽  
Vol 19 (12) ◽  
pp. 2410-2417
Author(s):  
◽  
Elton S. Smith
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Ground State ◽  
Invariant Mass Spectrum ◽  
Photon Beam ◽  
Production Mechanism ◽  
Total Cross Sections ◽  
Deuterium Target ◽  
Upper Limits ◽  
First Excited State

We present the results of photoproduction cross sections of the ground state cascade Ξ- and the first excited state Ξ*-(1530) measured with the CLAS detector. The photoproduction of the cascade resonances has been investigated in the reactions γp → K+K+(X) and γp → K+K+π-(X). The differential and total cross sections of the Ξ- were determined for photon beam energies from 2.75 to 4.75 GeV and are consistent with a production mechanism of Y* → K+Ξ- through a t-channel process. The cross-section of the Ξ*-(1530) has been determined for photon beam energies from 3.35 to 4.75 GeV. The reaction γp → K+K+π-(Ξ0) has also been investigated in the search for excited cascade resonances decaying to π-Ξ0. No significant signal of excited cascade states other than the well-known Ξ*-(1530) is observed. We also present the latest results of a search for the Φ--(1862) exotic pentaquark state in a photoproduction experiment on a deuterium target. A high-statistics sample of π-Ξ- events have been collected and analyzed. A preliminary invariant mass spectrum of the π-Ξ- system is presented, which is used to set upper limits on the photoproduction of the Φ-- pentaquark state.

RECENT RESULTS FROM GRAAL

2005 ◽  
Vol 20 (02n03) ◽  
pp. 503-513 ◽  
Author(s):  
◽  
D. MORICCIANI ◽  
O. BARTALINI ◽  
V. BELLINI ◽  
J. P. BOCQUET ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Cross Sections ◽  
Energy Region ◽  
Laser Light ◽  
Theoretical Models ◽  
High Energy ◽  
Angular Range ◽  
High Energy Electron ◽  
Deuterium Target ◽  
Beam Polarisation

A polarised and tagged [Formula: see text] ray beam is produced at GRAAL by the Compton scattering of laser light on the high energy electron of the ESRF storage ring. We present results on the beam polarisation asymmetries and cross sections in the photoproduction of mesons on hydrogen and deuterium target in the energy region 500-1500 MeV. These very precise results cover the angular range 30°-150°, providing stringent constraints to theoretical models.

Analysis of STEM micrographs of thick objects

1978 ◽  
Vol 36 (2) ◽  
pp. 106-107
Author(s):  
S. Golladay
Keyword(s):  
Inelastic Scattering ◽  
Multiple Scattering ◽  
Mass Distribution ◽  
Cross Sections ◽  
Phase Contrast ◽  
Image Point ◽  
Contrast Effects ◽  
Total Cross Sections ◽  
Elastic And Inelastic Scattering

The theory of multiple scattering has been worked out by Groves and comparisons have been made between predicted and observed signals for thick specimens observed in a STEM under conditions where phase contrast effects are unimportant. Independent measurements of the collection efficiencies of the two STEM detectors, calculations of the ratio σe/σi = R, where σe, σi are the total cross sections for elastic and inelastic scattering respectively, and a model of the unknown mass distribution are needed for these comparisons. In this paper an extension of this work will be described which allows the determination of the required efficiencies, R, and the unknown mass distribution from the data without additional measurements or models. Essential to the analysis is the fact that in a STEM two or more signal measurements can be made simultaneously at each image point.

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

An Analysis of Dissociation of Molecules in a High Resolution Electron Microscope

1973 ◽  
Vol 31 ◽  
pp. 486-487
Author(s):  
Mihir Parikh
Keyword(s):  
Electron Microscope ◽  
High Resolution ◽  
Cross Sections ◽  
Resolving Power ◽  
Peak Intensity ◽  
Molecular Film ◽  
Resolution Electron ◽  
Dissociation Cross Section ◽  
High Resolution Electron Microscope ◽  
The Stability

It is well known that the resolution of bio-molecules in a high resolution electron microscope depends not just on the physical resolving power of the instrument, but also on the stability of these molecules under the electron beam. Experimentally, the damage to the bio-molecules is commo ly monitored by the decrease in the intensity of the diffraction pattern, or more quantitatively by the decrease in the peaks of an energy loss spectrum. In the latter case the exposure, EC, to decrease the peak intensity from IO to I’O can be related to the molecular dissociation cross-section, σD, by EC = ℓn(IO /I’O) /ℓD. Qu ntitative data on damage cross-sections are just being reported, However, the microscopist needs to know the explicit dependence of damage on: (1) the molecular properties, (2) the density and characteristics of the molecular film and that of the support film, if any, (3) the temperature of the molecular film and (4) certain characteristics of the electron microscope used

Surface ultrastructure of danazol treated rat endometrium: A SEM study

1983 ◽  
Vol 41 ◽  
pp. 556-557
Author(s):  
R.P. Apkarian ◽  
J.S. Sanfilippo
Keyword(s):  
Cross Sections ◽  
Reproductive Tract ◽  
Preliminary Investigation ◽  
Breast Disease ◽  
Distal Segment ◽  
Uterine Horn ◽  
Female Reproductive Tract ◽  
Ultrastructural Changes ◽  
Cycle Phase ◽  
Sprague Dawley

The synthetic androgen danazol, is an isoxazol derivative of ethisterone. It is utilized in the treatment of endometriosis, fibrocystic breast disease, and has a potential use as a contraceptive. A study was designed to evaluate the ultrastructural changes associated with danazol therapy in a rat model. The preliminary investigation of the distal segment of the rat uterine horn was undertaken as part of a larger study intended to elucidate the effects of danazol on the female reproductive tract.Cross-sections (2-3 mm in length) of the distal segment of the uterine horn from sixteen Sprague-Dawley rats were prepared for SEM. Ten rats in estrus served as controls and six danazol treated rats were noted to have alterations of the estrus cycle i.e. a lag in cycle phase or noncycling patterns. Specimens were fixed in 3% glutaraldehyde in 0.05M phosphate buffer containing CaCl2 at pH 7.0-7.4 and chilled to 4°C. After a brief wash in distilled water, specimens were passed through a graded series of ethanol, critical point dryed in CO2 from absolute ethanol, and coated with 6nm Au. Observations were made with an IS1-40 SEM operated at 15kV.

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