Measurement of neutron-proton capture in the SNO+ water phase
Measurement of neutron-proton capture in the SNO+ water phase
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DOI：
10.1103/physrevc.102.014002
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发表时间：
2020-02
影响因子：
3.1
通讯作者：
M. Anderson;S. Andringa;M. Askins;D. Auty;N. Barros;F. Barão;R. Bayes;E. Beier;A. Bialek;S. Biller;E. Blucher;R. Bonventre;M. Boulay;E. Caden;E. Callaghan;J. Caravaca;D. Chauhan;M. Chen;O. Chkvorets;B. Cleveland;M. A. Cox;M. M. Depatie-M.;J. Dittmer;F. Di Lodovico;A. Earle;E. Falk;N. Fatemighomi;V. Fischer;E. Fletcher;R. Ford;K. Frankiewicz;K. Gilje;D. Gooding;C. Grant;J. Grove;A. Hallin;D. Hallman;S. Hans;J. Hartnell;P. Harvey;W. Heintzelman;R. Helmer;D. Horne;B. Hreljac;J. Hu;A. Hussain;A. S. Inácio;C. Jillings;T. Kaptanoglu;P. Khaghani;J. Klein;R. Knapik;L. Kormos;B. Krar;C. Kraus;C. Krauss;T. Kroupová;I. Lam;B. Land;A. Latorre;I. Lawson;L. Lebanowski;E. Leming;A. Li;J. Lidgard;B. Liggins;Y. H. Lin;Y. Liu;V. Lozza;M. Luo;S. Maguire;A. Maio;S. Manecki;J. Maneira;R. D. Martin;E. Marzec;A. Mastbaum;N. McCauley;A. McDonald;P. Mekarski;M. Meyer;C. Mills;I. Morton-Blake;S. Nae;M. Nirkko;L. Nolan;H. O'Keeffe;G. O. Orebi Gann;M. Parnell;J. Paton;S. Peeters;T. Pershing;L. Pickard;G. Prior;A. Reichold;S. Riccetto;R. Richardson;M. Rigan;J. Rose;R. Rosero;P. Rost;J. Rumleskie;I. Semenec;F. Shaker;M. Sharma;K. Singh;P. Skensved;M. Smiley;M. Stringer;R. Svoboda;B. Tam;L. Tian;J. Tseng;E. Turner;R. Van Berg;J. Veinot;C. J. Virtue;E. V'azquez-J'auregui;S. C. Walton;J. Wang;M. Ward;J. J. Weigand-J.;J. R. Wilson;P. Woosaree;A. Wright;J. Yáñez;M. Yeh;T. Zhang;Y. Zhang;K. Zuber;A. Zummo
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文献类型：
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作者：
M. Anderson;S. Andringa;M. Askins;D. Auty;N. Barros;F. Barão;R. Bayes;E. Beier;A. Bialek;S. Biller;E. Blucher;R. Bonventre;M. Boulay;E. Caden;E. Callaghan;J. Caravaca;D. Chauhan;M. Chen;O. Chkvorets;B. Cleveland;M. A. Cox;M. M. Depatie-M.;J. Dittmer;F. Di Lodovico;A. Earle;E. Falk;N. Fatemighomi;V. Fischer;E. Fletcher;R. Ford;K. Frankiewicz;K. Gilje;D. Gooding;C. Grant;J. Grove;A. Hallin;D. Hallman;S. Hans;J. Hartnell;P. Harvey;W. Heintzelman;R. Helmer;D. Horne;B. Hreljac;J. Hu;A. Hussain;A. S. Inácio;C. Jillings;T. Kaptanoglu;P. Khaghani;J. Klein;R. Knapik;L. Kormos;B. Krar;C. Kraus;C. Krauss;T. Kroupová;I. Lam;B. Land;A. Latorre;I. Lawson;L. Lebanowski;E. Leming;A. Li;J. Lidgard;B. Liggins;Y. H. Lin;Y. Liu;V. Lozza;M. Luo;S. Maguire;A. Maio;S. Manecki;J. Maneira;R. D. Martin;E. Marzec;A. Mastbaum;N. McCauley;A. McDonald;P. Mekarski;M. Meyer;C. Mills;I. Morton-Blake;S. Nae;M. Nirkko;L. Nolan;H. O'Keeffe;G. O. Orebi Gann;M. Parnell;J. Paton;S. Peeters;T. Pershing;L. Pickard;G. Prior;A. Reichold;S. Riccetto;R. Richardson;M. Rigan;J. Rose;R. Rosero;P. Rost;J. Rumleskie;I. Semenec;F. Shaker;M. Sharma;K. Singh;P. Skensved;M. Smiley;M. Stringer;R. Svoboda;B. Tam;L. Tian;J. Tseng;E. Turner;R. Van Berg;J. Veinot;C. J. Virtue;E. V'azquez-J'auregui;S. C. Walton;J. Wang;M. Ward;J. J. Weigand-J.;J. R. Wilson;P. Woosaree;A. Wright;J. Yáñez;M. Yeh;T. Zhang;Y. Zhang;K. Zuber;A. Zummo
SNO+实验于2017年9月至2019年7月作为低阈值水切伦科夫探测器收集数据。利用Am-Be校准源测量了氢中子捕获产生的2.2 mev s，其中大部分发射中子与4.4 mev γ同时产生。对4.4 mev γ和2.2 mev捕获γ之间的延迟巧合分析表明，中子探测效率以50%左右为中心，在探测器内部区域以1%的水平变化，据我们所知，这是纯水切伦科夫探测器中达到的最高效率。此外，测量了中子捕获时间常数，并将其转换为热中子-质子捕获截面为336.3+1.2-1.5 mb。
The SNO+ experiment collected data as a low-threshold water Cherenkov detector from September 2017 to July 2019. Measurements of the 2.2-MeV s produced by neutron capture on hydrogen have been made using an Am-Be calibration source, for which a large fraction of emitted neutrons are produced simultaneously with a 4.4-MeV γ. Analysis of the delayed coincidence between the 4.4-MeV γ and the 2.2-MeV capture γ revealed a neutron detection efficiency that is centered around 50% and varies at the level of 1% across the inner region of the detector, which to our knowledge is the highest efficiency achieved among pure water Cherenkov detectors. In addition, the neutron capture time constant was measured and converted to a thermal neutron-proton capture cross section of 336.3+1.2-1.5 mb.