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The selection of low-radioactive construction materials is of the utmost importance for rare-event searches and thus critical to the XENONnT experiment. Results of an extensive radioassay program are reported, in which material samples have been screened with gamma-ray spectroscopy, mass spectrometry, and 222Rn emanation measurements. Furthermore, the cleanliness procedures applied to remove or mitigate surface contamination of detector materials are described. Screening results, used as inputs for a XENONnT Monte Carlo simulation, predict a reduction of materials background (∼ 17%) with respect to its predecessor XENON1T. Through radon emanation measurements, the expected 222Rn activity concentration in XENONnT is determined to be 4.2 (-0.7+0.5) μ Bq/kg, a factor three lower with respect to XENON1T. This radon concentration will be further suppressed by means of the novel radon distillation system.

Material radiopurity control in the XENONnT experiment

Aprile E.;Abe K.;Agostini F.;Ahmed Maouloud S.;Alfonsi M.;Althueser L.;Angelino E.;Angevaare J. R.;Antochi V. C.;Anton Martin D.;Arneodo F.;Baudis L.;Baxter A. L.;Bellagamba L.;Biondi R.;Bismark A.;Brown A.;Bruenner S.;Bruno G.;Budnik R.;Capelli C.;Cardoso J. M. R.;Cichon D.;Cimmino B.;Clark M.;Colijn A. P.;Conrad J.;Cuenca-Garcia J. J.;Cussonneau J. P.;D'Andrea V.;Decowski M. P.;Gangi P. D.;Pede S. D.;Giovanni A. D.;Stefano R. D.;Diglio S.;Elykov A.;Farrell S.;Ferella A. D.;Fischer H.;Fulgione W.;Gaemers P.;Gaior R.;Galloway M.;Gao F.;Glade-Beucke R.;Grandi L.;Grigat J.;Higuera A.;Hils C.;Hiraide K.;Hoetzsch L.;Howlett J.;Iacovacci M.;Itow Y.;Jakob J.;Joerg F.;Kato N.;Kavrigin P.;Kazama S.;Kobayashi M.;Koltman G.;Kopec A.;Landsman H.;Lang R. F.;Levinson L.;Li I.;Liang S.;Lindemann S.;Lindner M.;Liu K.;Lombardi F.;Long J.;Lopes J. A. M.;Ma Y.;Macolino C.;Mahlstedt J.;Mancuso A.;Manenti L.;Manfredini A.;Marignetti F.;Marrodan Undagoitia T.;Martens K.;Masbou J.;Masson D.;Masson E.;Mastroianni S.;Messina M.;Miuchi K.;Mizukoshi K.;Molinario A.;Moriyama S.;Mora K.;Mosbacher Y.;Murra M.;Ni K.;Oberlack U.;Palacio J.;Peres R.;Pienaar J.;Pierre M.;Pizzella V.;Plante G.;Qi J.;Qin J.;Ramirez Garcia D.;Reichard S.;Rocchetti A.;Rupp N.;Sanchez L.;dos Santos J. M. F.;Sartorelli G.;Schreiner J.;Schulte D.;Schulze Eissing H.;Schumann M.;Lavina L. S.;Selvi M.;Semeria F.;Shagin P.;Shockley E.;Silva M.;Simgen H.;Takeda A.;Tan P. L.;Terliuk A.;Therreau C.;Thers D.;Toschi F.;Trinchero G.;Tunnell C.;Tonnies F.;Valerius K.;Volta G.;Wei Y.;Weinheimer C.;Weiss M.;Wenz D.;Westermann J.;Wittweg C.;Wolf T.;Xu Z.;Yamashita M.;Yang L.;Ye J.;Yuan L.;Zavattini G.;Zhang Y.;Zhong M.;Zhu T.;Zopounidis J. P.;Laubenstein M.;Nisi S.

2022-01-01

Abstract

The selection of low-radioactive construction materials is of the utmost importance for rare-event searches and thus critical to the XENONnT experiment. Results of an extensive radioassay program are reported, in which material samples have been screened with gamma-ray spectroscopy, mass spectrometry, and 222Rn emanation measurements. Furthermore, the cleanliness procedures applied to remove or mitigate surface contamination of detector materials are described. Screening results, used as inputs for a XENONnT Monte Carlo simulation, predict a reduction of materials background (∼ 17%) with respect to its predecessor XENON1T. Through radon emanation measurements, the expected 222Rn activity concentration in XENONnT is determined to be 4.2 (-0.7+0.5) μ Bq/kg, a factor three lower with respect to XENON1T. This radon concentration will be further suppressed by means of the novel radon distillation system.

Scheda breve

Scheda completa

Scheda completa (DC)

	Anno
	
			2022
		
	Titolo rivista
	
			THE EUROPEAN PHYSICAL JOURNAL. C, PARTICLES AND FIELDS
		
	N. Volume
	
			82
		
	Fascicolo
	
			7
		
	Pagine (da)
	
			599
		
	Pagine (a)
	
			619
		
	DOI
	
			https://dx.doi.org/10.1140/epjc/s10052-022-10345-6
		
	Tutti gli autori
	
			Aprile E.; Abe K.; Agostini F.; Ahmed Maouloud S.; Alfonsi M.; Althueser L.; Angelino E.; Angevaare J.R.; Antochi V.C.; Anton Martin D.; Arneodo F.; Baudis L.; Baxter A.L.; Bellagamba L.; Biondi R.; Bismark A.; Brown A.; Bruenner S.; Bruno G.; Budnik R.; Capelli C.; Cardoso J.M.R.; Cichon D.; Cimmino B.; Clark M.; Colijn A.P.; Conrad J.; Cuenca-Garcia J.J.; Cussonneau J.P.; D'Andrea V.; Decowski M.P.; Gangi P.D.; Pede S.D.; Giovanni A.D.; Stefano R.D.; Diglio S.; Elykov A.; Farrell S.; Ferella A.D.; Fischer H.; Fulgione W.; Gaemers P.; Gaior R.; Galloway M.; Gao F.; Glade-Beucke R.; Grandi L.; Grigat J.; Higuera A.; Hils C.; Hiraide K.; Hoetzsch L.; Howlett J.; Iacovacci M.; Itow Y.; Jakob J.; Joerg F.; Kato N.; Kavrigin P.; Kazama S.; Kobayashi M.; Koltman G.; Kopec A.; Landsman H.; Lang R.F.; Levinson L.; Li I.; Liang S.; Lindemann S.; Lindner M.; Liu K.; Lombardi F.; Long J.; Lopes J.A.M.; Ma Y.; Macolino C.; Mahlstedt J.; Mancuso A.; Manenti L.; Manfredini A.; Marignetti F.; Marrodan Undagoitia T.; Martens K.; Masbou J.; Masson D.; Masson E.; Mastroianni S.; Messina M.; Miuchi K.; Mizukoshi K.; Molinario A.; Moriyama S.; Mora K.; Mosbacher Y.; Murra M.; Ni K.; Oberlack U.; Palacio J.; Peres R.; Pienaar J.; Pierre M.; Pizzella V.; Plante G.; Qi J.; Qin J.; Ramirez Garcia D.; Reichard S.; Rocchetti A.; Rupp N.; Sanchez L.; dos Santos J.M.F.; Sartorelli G.; Schreiner J.; Schulte D.; Schulze Eissing H.; Schumann M.; Lavina L.S.; Selvi M.; Semeria F.; Shagin P.; Shockley E.; Silva M.; Simgen H.; Takeda A.; Tan P.L.; Terliuk A.; Therreau C.; Thers D.; Toschi F.; Trinchero G.; Tunnell C.; Tonnies F.; Valerius K.; Volta G.; Wei Y.; Weinheimer C.; Weiss M.; Wenz D.; Westermann J.; Wittweg C.; Wolf T.; Xu Z.; Yamashita M.; Yang L.; Ye J.; Yuan L.; Zavattini G.; Zhang Y.; Zhong M.; Zhu T.; Zopounidis J.P.; Laubenstein M.; Nisi S.
		
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1882678

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