Featured Research

from universities, journals, and other organizations

Sudbury Neutrino Observatory Reports New Measurements - Thanks To Table Salt!

Date:
September 11, 2003
Source:
Particle Physics And Astronomy Research Council
Summary:
In a presentation on Sunday September 7th, at TAUP2003, a major scientific conference in Seattle, Washington, new measurements were reported that strongly confirm the original SNO results announced in 2001 and 2002 that solved the "Solar Neutrino Problem" and go much further in establishing the properties of neutrinos that cause them to change from one type to another in transit to the Earth from the Sun.

A common table commodity that people sprinkle on their food every day is the main ingredient in new measurements by scientists at the Sudbury Neutrino Observatory (SNO). In a presentation on Sunday September 7th, at TAUP2003, a major scientific conference in Seattle, Washington, new measurements were reported that strongly confirm the original SNO results announced in 2001 and 2002 that solved the "Solar Neutrino Problem" and go much further in establishing the properties of neutrinos that cause them to change from one type to another in transit to the Earth from the Sun.

Related Articles


"We have moved to a precision phase of the measurements." says Queen's University Professor Art McDonald, SNO Project Director through the first two phases of the project. "These measurements are essential to define a new theory of elementary particles required to explain finite neutrino masses and their ability to change types. Some of the simplest proposed theories have already been ruled out."

To accomplish the new measurements, the SNO Collaboration added 2 tonnes of high-purity table salt (NaCl) to the 1000 tonnes of heavy water at the heart of the detector, sited 2 kilometres underground in near Sudbury, Canada. Two-thirds of the electron-type neutrinos produced by nuclear reactions in the core of the Sun are observed to change to muon- or tau-type neutrinos before reaching the Earth. "These new solid results are obtained with a 'pinch of salt', providing three times better sensitivity to the muon and tau neutrinos." Says Professor Tony Noble, Director of the SNO Institute that administers the project on behalf of an international collaboration of 130 scientists from 15 institutions in Canada, the U.S. and the U.K.

The observations in recent years that neutrinos change from one type to another, implying that they have mass, has led to great interest in the scientific community.

These new findings require a modification of the most basic theories for elementary particles and have provided a strong confirmation that our theories of energy generation in the Sun are very accurate. New experiments to provide further information on neutrino properties and the origin of the Dark Matter in the Universe are being developed. These include projects that could be sited in the new SNOLAB being developed near the SNO underground site. Such measurements could provide insight into fundamental questions such as why our Universe is composed of matter rather than anti-matter. The answers to such questions require a further understanding of elementary particle theory and further insight into the evolution of the Universe.

To pursue such questions, the Sudbury Neutrino Observatory is about to enter a third experimental phase with new sensitivity. Professor Hamish Robertson of the University of Washington, Seattle, US Co-spokesman and Interim SNO Director for this transition phase, says "We have developed a half-kilometre-long array of ultra-clean detectors to be placed in the heavy water after the salt is removed in September. These detectors are precision instruments that will give us further insight into neutrino properties."

Professor Nick Jelley of Oxford University, co-spokesman of the UK SNO Collaboration states, "As we have moved forward with ever increasing sensitivity, we are learning more about neutrinos and their place in the Universe. It is very exciting to be performing these ground-breaking measurements with our unique experimental sensitivity."

The new results from the Sudbury Neutrino Observatory (SNO) have been submitted for publication and are posted at http://www.sno.phy.queensu.ca/

The web site for the TAUP 2003 conference is: http://int.phys.washington.edu/taup2003/


Story Source:

The above story is based on materials provided by Particle Physics And Astronomy Research Council. Note: Materials may be edited for content and length.


Cite This Page:

Particle Physics And Astronomy Research Council. "Sudbury Neutrino Observatory Reports New Measurements - Thanks To Table Salt!." ScienceDaily. ScienceDaily, 11 September 2003. <www.sciencedaily.com/releases/2003/09/030911072919.htm>.
Particle Physics And Astronomy Research Council. (2003, September 11). Sudbury Neutrino Observatory Reports New Measurements - Thanks To Table Salt!. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2003/09/030911072919.htm
Particle Physics And Astronomy Research Council. "Sudbury Neutrino Observatory Reports New Measurements - Thanks To Table Salt!." ScienceDaily. www.sciencedaily.com/releases/2003/09/030911072919.htm (accessed October 30, 2014).

Share This



More Matter & Energy News

Thursday, October 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Reuters - Innovations Video Online (Oct. 29, 2014) A Swedish amputee who became the first person to ever receive a brain controlled prosthetic arm is able to manipulate and handle delicate objects with an unprecedented level of dexterity. The device is connected directly to his bone, nerves and muscles, giving him the ability to control it with his thoughts. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Robots Get Funky on the Dance Floor

Robots Get Funky on the Dance Floor

AP (Oct. 29, 2014) Dancing, spinning and fighting robots are showing off their agility at "Robocomp" in Krakow. (Oct. 29) Video provided by AP
Powered by NewsLook.com
Saharan Solar Project to Power Europe

Saharan Solar Project to Power Europe

Reuters - Business Video Online (Oct. 29, 2014) A solar energy project in the Tunisian Sahara aims to generate enough clean energy by 2018 to power two million European homes. Matt Stock reports. Video provided by Reuters
Powered by NewsLook.com
Lowe's Testing Robot Sales Assistants in California Store

Lowe's Testing Robot Sales Assistants in California Store

Buzz60 (Oct. 29, 2014) Lowe’s is testing out what it’s describing as a robotic shopping assistant in one of its Orchard Supply Hardware Stores in California. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins