{"title":"在ATIC实验和局部气泡中观察到Z=16-24的原子核与铁的比值上升","authors":"A.D. Panov, N.V. Sokolskaya, V.I. Zatsepin","doi":"10.1016/j.nuclphysbps.2014.10.027","DOIUrl":null,"url":null,"abstract":"<div><p>The ratios of heavy nuclei from Sulfur (<span><math><mi>Z</mi><mo>=</mo><mn>16</mn></math></span>) to Chromium (<span><math><mi>Z</mi><mo>=</mo><mn>24</mn></math></span>) fluxes to the flux of iron nuclei were measured recently in the ATIC-2 experiment. These ratios were the decreasing functions of energy from 5 GeV/n to approximately 50 GeV/n as expected. However, an unexpected sharp upturn in the ratios was observed at energy ∼ 50 GeV/n. In this paper, we revise the data and show that the statistical confidence of the observed upturn in the ATIC data is 99.7% and some additional arguments supporting the phenomenon are presented. A possible cause of the upturn is discussed and it is demonstrated that it can be partially understood within a model of ‘Closed Galaxy with Bubbles’ (CGB). Some features and problems of the CGB model are discussed.</p></div>","PeriodicalId":93343,"journal":{"name":"Nuclear physics. B, Proceedings, supplements","volume":"256 ","pages":"Pages 233-240"},"PeriodicalIF":0.0000,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.10.027","citationCount":"6","resultStr":"{\"title\":\"Upturn in the ratio of nuclei of Z=16–24 to iron observed in the ATIC experiment and the Local Bubble\",\"authors\":\"A.D. Panov, N.V. Sokolskaya, V.I. Zatsepin\",\"doi\":\"10.1016/j.nuclphysbps.2014.10.027\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The ratios of heavy nuclei from Sulfur (<span><math><mi>Z</mi><mo>=</mo><mn>16</mn></math></span>) to Chromium (<span><math><mi>Z</mi><mo>=</mo><mn>24</mn></math></span>) fluxes to the flux of iron nuclei were measured recently in the ATIC-2 experiment. These ratios were the decreasing functions of energy from 5 GeV/n to approximately 50 GeV/n as expected. However, an unexpected sharp upturn in the ratios was observed at energy ∼ 50 GeV/n. In this paper, we revise the data and show that the statistical confidence of the observed upturn in the ATIC data is 99.7% and some additional arguments supporting the phenomenon are presented. A possible cause of the upturn is discussed and it is demonstrated that it can be partially understood within a model of ‘Closed Galaxy with Bubbles’ (CGB). Some features and problems of the CGB model are discussed.</p></div>\",\"PeriodicalId\":93343,\"journal\":{\"name\":\"Nuclear physics. B, Proceedings, supplements\",\"volume\":\"256 \",\"pages\":\"Pages 233-240\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2014-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.nuclphysbps.2014.10.027\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nuclear physics. B, Proceedings, supplements\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0920563214002217\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nuclear physics. B, Proceedings, supplements","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0920563214002217","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Upturn in the ratio of nuclei of Z=16–24 to iron observed in the ATIC experiment and the Local Bubble
The ratios of heavy nuclei from Sulfur () to Chromium () fluxes to the flux of iron nuclei were measured recently in the ATIC-2 experiment. These ratios were the decreasing functions of energy from 5 GeV/n to approximately 50 GeV/n as expected. However, an unexpected sharp upturn in the ratios was observed at energy ∼ 50 GeV/n. In this paper, we revise the data and show that the statistical confidence of the observed upturn in the ATIC data is 99.7% and some additional arguments supporting the phenomenon are presented. A possible cause of the upturn is discussed and it is demonstrated that it can be partially understood within a model of ‘Closed Galaxy with Bubbles’ (CGB). Some features and problems of the CGB model are discussed.
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