Yale scientists are part of a new international test that challenges previous bidding of a & # 39; find a brutal dark case.
Astrophysical evidence shows that there is a lot of dark and obscure darkness on its; globally, but no definite signal was made despite the efforts of several probation groups. One exception to this is the lengthy debate that was discussed with the collaboration DArk MAtter (DAMA), who has made positive comments on a dark case in his sodium-iodide detector detector.
The new COSINE-100 test based on an underground case detector, darkness at the Yangyang Underground Laboratory in South Korea, has begun to investigate the DAMA application. This is the first test that is delicate enough to test DAMA and its & # 39; using the same sodium sodium target material.
COSINE-100 has data data from 2016 and now there are original results that challenge DAMA's conclusions. These results are now published online in the magazine NatureSouth Westerly
"For the first time in 20 years, we have a chance to solve the DAMA at risk," said Yale's physics professor, Reina Maruyama, who is a co-speaker for COSINE-100 and co -the new inspector.
The first stage of the COSINE-100 work is to & # 39; Look for a dark case by searching over a mark over its & # 39; backgrounds in which you expect, with the energy and the right features. In this first survey, researchers have not found that there was a signal in data, and # 39; Modify DAMA modes as a signal compared to results from other tests. COSINE-100 scientists noted that it will take several years of data to verify DAMA's results to be fully proven or compensated.
The COSINE-100 test using eight detractive particulates of sodium crystals, which is converted by a hallium, is arranged in a 4-by-2 series; A total target of 106 kg. Each crystal is attached to two imaging devices to measure the amount of energy installed in crystal.
The sodium iodide crystal concentrations are immersed in 2,200 L of energy which produces light light, which allows to reduce the amount of sodium iodide crystals. identify and reduce after radioclications that are visible to the crystals. The detector in the nesting arrangement of copper, lead, and plastic components to reduce the backing support from external radiation, as well as cosmetic sand mill.
The COSINE-100 collaboration comprises 50 scientists from U.S., South Korea, the United Kingdom, Brazil, and Indonesia. The Yangyang Laboratory Underground, where the tests are based, is run by the Center for Underground Physics at the Institute for Basic Science (IBS) in South Korea.
"The original results include a fair section of the bold search section drawn by the DAMA signal. In other words, there is not enough room for this application to be from the case transaction dark unless the case model changed dramatically, "said Hyun Su Lee, fellow co-speaker for COSINE-100, and associated director of IBS Physics Underground Center.
Materials supplied by Yale UniversitySouth Westerly Note: Content can be edited for style and length.