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Monday, May 4, 2020 | History

3 edition of A new test of extraction efficiency for the homestake solar neutrino experiment found in the catalog.

A new test of extraction efficiency for the homestake solar neutrino experiment

Mark Guy Boulay

A new test of extraction efficiency for the homestake solar neutrino experiment

by Mark Guy Boulay

  • 249 Want to read
  • 23 Currently reading

Published by Laurentian University Press in Sudbury, Ont .
Written in English


Edition Notes

StatementMark Guy Boulay
The Physical Object
Paginationxiii, 104 l. :
Number of Pages104
ID Numbers
Open LibraryOL20637780M
ISBN 100612165531
OCLC/WorldCa46523577

2. Brief History and Solution of the Solar Neutrino Problem From Homestake to Super-Kamiokande. The first experiment built to detect solar neutrinos took place in the Homestake gold mine in South Dakota [14–16]. The detector consisted of a large tank containing metric tons of liquid perchloroethylene, chosen because it is rich in. This report is intended to describe first, the principal physics reasons for an ambitious experimental program in neutrino physics and proton decay based on construction of a series of massive water Cherenkov detectors located deep underground ( ft) in the Homestake Mine of the South Dakota Science and Technology Authority (SDSTA); and second, the engineering design of the underground.

The Homestake experiment was designed to detect solar neutrinos. In order to shield it from the background, it was set up in a deep underground mine. It was found that the only one third of expected neutrinos were detected, leading to the solar neutrino problem. What I wonder is why neutrinos created in the upper atmosphere by cosmic rays were. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.

The original motivation for doing solar neutrino experiments was quite different. 4 The aim 30 years ago was to use the neutrinos produced by nuclear reactions between light elements in the solar core to test the theory of stellar evolution and the general presumption that the ultimate source of the Sun's energy is nuclear fusion. Stars are. 1; THE SOLAR NEUTRINO DEFICIT - PRINCIPLE AND INTEREST (A MODERN PROBLEM) R. G. H. ROBERTSON Department of Physics, University of Washington, Seattle, WA 95, $&j-! Sufficient data now exist that tests, independent of any solar model, can be made of whether solar neutrino experiments are consistent with the minimal Standard Model (stable, massless neutrinos).Author: R.G.H. Robertson.


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A new test of extraction efficiency for the homestake solar neutrino experiment by Mark Guy Boulay Download PDF EPUB FB2

The Homestake Solar Neutrino Experiment 19 A neutron source test will work equally well with the two gallium experiments and give an important confirmation of their chemical procedures.

The neutron yield has been measured for the acid gallium chloride solution method used by GALLEX, and the neutron yield is comparable to that given above (Davis et al., ).Cited by:   The Homestake Solar Neutrino Detector, based on the inverse beta-decay reaction ν e + 37 Cl --> 37 Ar + e - has been measuring the flux of solar neutrinos since The experiment has operated in a stable manner throughout this time period.

All aspects of this detector are reviewed, with particular emphasis on the determination of the extraction and counting efficiencies, the key Cited by: The neutrino spectrum from the sun has been mea- sured for 8 B and 7 Be neutrinos[5], and radiochemical experiments have measured the integral solar neutrino flux, including the pp reaction[6].

New experiments are being constructed to probe the absolute neutrino mass scale[7] and determine the basic structure of the neutrino sector of the Author: Robert Svoboda. A discussion is given of the question of a possible variation of the solar neutrino flux in anticorrelation with the solar activity cycle.

The operation of the Homestake experiment, the sensitivity to the solar neutrino spectrum, the background processes and the various tests that have been performed are given in some detail. Davis, by: The Homestake chlorine solar neutrino detector has measured the total flux of electron neutrinos from the Sun above MeV as ±(stat)±(syst) SNU compared to the predicted flux of.

The Homestake Solar Neutrino Detector, based on the inverse beta-decay reaction νe +37Cl →37Ar + e- has been measuring the flux of solar neutrinos since The experiment has operated in a stable manner throughout this time period. All aspects of this detector are reviewed, with particular emphasis on the determination of the extraction and counting efficiencies, the key experimental parameters that are.

The Homestake Solar Neutrino Detector, based on the inverse beta-decay reaction ν e + 37 Cl → 37 Ar + e- has been measuring the flux of solar neutrinos since The experiment has operated in a stable manner throughout this time period.

All aspects of this detector are reviewed, with particular emphasis on the determination of the Cited by: Abstract The observations from the Homestake radiochemical solar neutrino experiment over the period to are given. The observations will be compared to those from the Kamiokande II experiment, the gallium experiments and solar model calculations.

A discussion is given of the question of a possible variation of the solar neutrino flux. The initial observations with the Homestake detector showed that the solar neutrino flux was less than 3 SNU (Davis, Harmer, & Hoffman ), well below the solar model prediction (Bahcall, Bahcall, & Shaviv ).

(One solar neutrino unit = one interaction per 10 36 target atoms s) A series of tests were performed to verify that the detector was operating properly and was capable of observing the.

results of the four pioneering solar neutrino experiments. Finally, in Section 10 I describe the “smoking gun” signatures of physics beyond the minimal standard electroweak model that are being searched for with the new solar neutrino detec-tors.

I summarize in Section 11 my view of where we are now in solar neutrino : John Bahcall. A new detector will have a fiducial target mass of tons for solar neutrino studies, and it will have good precision in determining solar neutrino fluxes, especially that of 15 O neutrinos. This experiment will enable the upturn in solar neutrino oscillation and the.

CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): The Homestake result is about ∼ 2σ lower than the Ar-production rate, QAr, predicted by the LMA MSW solution of the solar neutrino problem. Also there is no apparent upturn of the energy spectrum (R ≡ Nobs/NSSM) at low energies in SNO and Super-Kamiokande.

Both these facts can be explained if a light, ∆m2 The Homestake solar electron-neutrino detector program: Chlorine and iodine, K. Lande, P. Wildenhain, 17th International Conference on Neutrino Physics and Astrophysics (Neutrino 96), Helsinki, Finland, June [Landegf]. Request PDF | Use of enriched isotopes to measure efficiency of chemical extraction in the SAGE solar neutrino experiment | The SAGE experiment, which measures the flux of solar neutrinos.

After correction for detection efficiency the number of 37 Ar atoms in the detector at extraction is observed to be o corresponding to a solar-neutrino-induced production rate of atoms per day, far fewer than the atoms per day expected on the basis of the standard model.

Keywords: Solar neutrinos, gallium experiment, GNO, GALLEX, neutrino mass. Introduction GNO (Gallium Neutrino Observatory) is the successor project of the Gallex solar neutrino experiment at the Gran Sasso Underground Laboratories (LNGS). The latter has been recording solar neutrinos with energies above keV via the inverse beta decay.

Mark Guy Boulay has written: 'A new test of extraction efficiency for the homestake solar neutrino experiment' Asked in Electronics How many batteries and solar panels are used in 5kva solar. The Homestake experiment was followed by other experiments with the same purpose, such as Kamiokande in Japan, SAGE in the former Soviet Union, GALLEX in Italy, Super Kamiokande, also in Japan, and SNO (Sudbury Neutrino Observatory) in Ontario, Canada.

SNO was the first detector able to detect neutrino oscillation, solving the solar neutrino problem. Abstract There exists no significant correlation between the Homestake neutrino data up to run and the monthly sunspot number, according to a test that is.

the Homestake neutrino experiment and standard solar model predictions, it was clear that the subject had reached an impasse and a new experiment was required.

The chlorine experiment is, according to standard solar model predictions, sensitive primarily to neutrinos from a rare fusion reaction that involves boron-8 neutrinos. Return to "Resources" Selected References - Homestake Mine, Lead, South Dakota.

Aase,A new test of extraction efficiency for the Homestake solar neutrino experiment: Sudbury, Ontario, Laurentian University of Sudbury.Abstract. A very short-baseline neutrino oscillation experiment with an intense 51 Cr neutrino source is currently under construction at the Baksan Neutrino Observatory of the Institute for Nuclear Research RAS (BNO).

The experiment, which is based on the existing SAGE experiment, will use an upgraded Gallium-Germanium Neutrino Telescope (GGNT) and an artificial 51 Cr neutrino source with.test, which proved the chemical efficiency to be ( )% Ga (n, γ) experiment To test the possibility that atomic excitations might tie up 71Ge in a chemical form from which it would not be efficiently extracted, the radioactive isotopes 70Ge and 72Ga, which beta decay to 70Ge and 72Ge, were produced in liquid gallium by neutron irradiation.