Assessment of backgrounds of the ANAIS experiment for dark matter direct detection
A large effort has been carried out to characterize the background of sodium iodide crystals within the Annual modulation with NaI Scintillators (ANAIS) project. In this paper, the background models developed for three 12.5 kg NaI(Tl) scintillators produced by Alpha Spectra Inc. and operated at the...
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| Veröffentlicht in: | The European physical journal. C, Particles and fields Particles and fields, 2016-08, Vol.76 (8), p.1, Article 429 |
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| creator | Amaré, J. Cebrián, S. Cuesta, C. García, E. Martínez, M. Oliván, M. A. Ortigoza, Y. Ortiz de Solórzano, A. Puimedón, J. Sarsa, M. L. Villar, J. A. Villar, P. |
| description | A large effort has been carried out to characterize the background of sodium iodide crystals within the Annual modulation with NaI Scintillators (ANAIS) project. In this paper, the background models developed for three 12.5 kg NaI(Tl) scintillators produced by Alpha Spectra Inc. and operated at the Canfranc Underground Laboratory are presented together with an evaluation of the background prospects for the full experiment. Measured spectra from threshold to high energy in different conditions are well described by the models based on quantified activities. At the region of interest, crystal bulk contamination is the dominant background source. Contributions from
210
Pb,
40
K,
22
Na and
3
H are the most relevant. Those from
40
K and
22
Na could be efficiently suppressed thanks to anticoincidence operation in a crystals matrix or inside a liquid scintillator veto (LSV), while that from
210
Pb has been reduced by improving crystal production methods and
3
H production could be reduced by shielding against cosmic rays during production. Assuming the activities of the last characterized detector, for nine crystals with a total mass of 112.5 kg the expected background rate is 2.5 counts/(keV kg day) in the region from 1 to 4 keV, which could be reduced at 1.4 counts/(keV kg day) by using a LSV. |
| doi_str_mv | 10.1140/epjc/s10052-016-4279-2 |
| format | Article |
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210
Pb,
40
K,
22
Na and
3
H are the most relevant. Those from
40
K and
22
Na could be efficiently suppressed thanks to anticoincidence operation in a crystals matrix or inside a liquid scintillator veto (LSV), while that from
210
Pb has been reduced by improving crystal production methods and
3
H production could be reduced by shielding against cosmic rays during production. Assuming the activities of the last characterized detector, for nine crystals with a total mass of 112.5 kg the expected background rate is 2.5 counts/(keV kg day) in the region from 1 to 4 keV, which could be reduced at 1.4 counts/(keV kg day) by using a LSV.</description><identifier>ISSN: 1434-6044</identifier><identifier>EISSN: 1434-6052</identifier><identifier>DOI: 10.1140/epjc/s10052-016-4279-2</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Astronomy ; Astrophysics and Cosmology ; Detection equipment ; Elementary Particles ; Hadrons ; Heavy Ions ; Measurement Science and Instrumentation ; Nuclear Energy ; Nuclear Physics ; Physics ; Physics and Astronomy ; Quantum Field Theories ; Quantum Field Theory ; Regular Article - Experimental Physics ; String Theory</subject><ispartof>The European physical journal. C, Particles and fields, 2016-08, Vol.76 (8), p.1, Article 429</ispartof><rights>The Author(s) 2016</rights><rights>COPYRIGHT 2016 Springer</rights><rights>The European Physical Journal C is a copyright of Springer, 2016.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c522t-66c684e671616875e485ced63fe7056ab5836872f47bd87aa6a3ab49f8c0b67b3</citedby><cites>FETCH-LOGICAL-c522t-66c684e671616875e485ced63fe7056ab5836872f47bd87aa6a3ab49f8c0b67b3</cites><orcidid>0000-0002-6948-5101</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1140/epjc/s10052-016-4279-2$$EPDF$$P50$$Gspringer$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://doi.org/10.1140/epjc/s10052-016-4279-2$$EHTML$$P50$$Gspringer$$Hfree_for_read</linktohtml><link.rule.ids>314,776,780,860,27903,27904,41099,41467,42168,42536,51297,51554</link.rule.ids></links><search><creatorcontrib>Amaré, J.</creatorcontrib><creatorcontrib>Cebrián, S.</creatorcontrib><creatorcontrib>Cuesta, C.</creatorcontrib><creatorcontrib>García, E.</creatorcontrib><creatorcontrib>Martínez, M.</creatorcontrib><creatorcontrib>Oliván, M. A.</creatorcontrib><creatorcontrib>Ortigoza, Y.</creatorcontrib><creatorcontrib>Ortiz de Solórzano, A.</creatorcontrib><creatorcontrib>Puimedón, J.</creatorcontrib><creatorcontrib>Sarsa, M. L.</creatorcontrib><creatorcontrib>Villar, J. A.</creatorcontrib><creatorcontrib>Villar, P.</creatorcontrib><title>Assessment of backgrounds of the ANAIS experiment for dark matter direct detection</title><title>The European physical journal. C, Particles and fields</title><addtitle>Eur. Phys. J. C</addtitle><description>A large effort has been carried out to characterize the background of sodium iodide crystals within the Annual modulation with NaI Scintillators (ANAIS) project. In this paper, the background models developed for three 12.5 kg NaI(Tl) scintillators produced by Alpha Spectra Inc. and operated at the Canfranc Underground Laboratory are presented together with an evaluation of the background prospects for the full experiment. Measured spectra from threshold to high energy in different conditions are well described by the models based on quantified activities. At the region of interest, crystal bulk contamination is the dominant background source. Contributions from
210
Pb,
40
K,
22
Na and
3
H are the most relevant. Those from
40
K and
22
Na could be efficiently suppressed thanks to anticoincidence operation in a crystals matrix or inside a liquid scintillator veto (LSV), while that from
210
Pb has been reduced by improving crystal production methods and
3
H production could be reduced by shielding against cosmic rays during production. Assuming the activities of the last characterized detector, for nine crystals with a total mass of 112.5 kg the expected background rate is 2.5 counts/(keV kg day) in the region from 1 to 4 keV, which could be reduced at 1.4 counts/(keV kg day) by using a LSV.</description><subject>Astronomy</subject><subject>Astrophysics and Cosmology</subject><subject>Detection equipment</subject><subject>Elementary Particles</subject><subject>Hadrons</subject><subject>Heavy Ions</subject><subject>Measurement Science and Instrumentation</subject><subject>Nuclear Energy</subject><subject>Nuclear Physics</subject><subject>Physics</subject><subject>Physics and Astronomy</subject><subject>Quantum Field Theories</subject><subject>Quantum Field Theory</subject><subject>Regular Article - Experimental Physics</subject><subject>String Theory</subject><issn>1434-6044</issn><issn>1434-6052</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9kV1LwzAUhosoOKd_QQpeedEtX026yzL8GIjCptchTU9m99HMJIP5702tiLuRXJyTw_MkIW-SXGM0wpihMexWeuwxQjnJEOYZI2KSkZNkgBllGY_j09-esfPkwvsVQogwVAySeek9eL-FNqTWpJXS66Wz-7b23Ta8Q1o-l7NFCocduOYbM9altXLrdKtCgNg3DnRIawixNLa9TM6M2ni4-qnD5O3-7nX6mD29PMym5VOmc0JCxrnmBQMuMMe8EDmwItdQc2pAoJyrKi9onBPDRFUXQimuqKrYxBQaVVxUdJjc9OfunP3Ygw9yZfeujVdKXGCMqBCURWrUU0u1Adm0xgandFw1bBttWzBNnJc5IpQTTnkUbo-EyAQ4hKXaey9ni_kxy3tWO-u9AyN38ZOU-5QYyS4c2YUj-3BkDEd24UgSRdGLPgrtEtyft_9vfgG9fpOx</recordid><startdate>20160801</startdate><enddate>20160801</enddate><creator>Amaré, J.</creator><creator>Cebrián, S.</creator><creator>Cuesta, C.</creator><creator>García, E.</creator><creator>Martínez, M.</creator><creator>Oliván, M. 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C, Particles and fields</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Amaré, J.</au><au>Cebrián, S.</au><au>Cuesta, C.</au><au>García, E.</au><au>Martínez, M.</au><au>Oliván, M. A.</au><au>Ortigoza, Y.</au><au>Ortiz de Solórzano, A.</au><au>Puimedón, J.</au><au>Sarsa, M. L.</au><au>Villar, J. A.</au><au>Villar, P.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Assessment of backgrounds of the ANAIS experiment for dark matter direct detection</atitle><jtitle>The European physical journal. C, Particles and fields</jtitle><stitle>Eur. Phys. J. C</stitle><date>2016-08-01</date><risdate>2016</risdate><volume>76</volume><issue>8</issue><spage>1</spage><pages>1-</pages><artnum>429</artnum><issn>1434-6044</issn><eissn>1434-6052</eissn><abstract>A large effort has been carried out to characterize the background of sodium iodide crystals within the Annual modulation with NaI Scintillators (ANAIS) project. In this paper, the background models developed for three 12.5 kg NaI(Tl) scintillators produced by Alpha Spectra Inc. and operated at the Canfranc Underground Laboratory are presented together with an evaluation of the background prospects for the full experiment. Measured spectra from threshold to high energy in different conditions are well described by the models based on quantified activities. At the region of interest, crystal bulk contamination is the dominant background source. Contributions from
210
Pb,
40
K,
22
Na and
3
H are the most relevant. Those from
40
K and
22
Na could be efficiently suppressed thanks to anticoincidence operation in a crystals matrix or inside a liquid scintillator veto (LSV), while that from
210
Pb has been reduced by improving crystal production methods and
3
H production could be reduced by shielding against cosmic rays during production. Assuming the activities of the last characterized detector, for nine crystals with a total mass of 112.5 kg the expected background rate is 2.5 counts/(keV kg day) in the region from 1 to 4 keV, which could be reduced at 1.4 counts/(keV kg day) by using a LSV.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1140/epjc/s10052-016-4279-2</doi><orcidid>https://orcid.org/0000-0002-6948-5101</orcidid><oa>free_for_read</oa></addata></record> |
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| subjects | Astronomy Astrophysics and Cosmology Detection equipment Elementary Particles Hadrons Heavy Ions Measurement Science and Instrumentation Nuclear Energy Nuclear Physics Physics Physics and Astronomy Quantum Field Theories Quantum Field Theory Regular Article - Experimental Physics String Theory |
| title | Assessment of backgrounds of the ANAIS experiment for dark matter direct detection |
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