Commissioning of the BRIKEN detector for the measurement of very exotic beta-delayed neutron emitters

A. Tolosa-Delgado; J. Agramunt; J. L. Tain; A. Algora; C. Domingo-Pardo; A. I. Morales; B. Rubio; A. Tarifeno-Saldivia; F. Calvino; G. Cortes; N. T. Brewer; B. C. Rasco; K. P. Rykaczewski; D. W. Stracener; J. M. Allmond; R. Grzywacz; R. Yokoyama; M. Singh; T. King; M. Madurga; S. Nishimura; V. H. Phong; S. Go; J. Liu; K. Matsui; H. Sakurai; G. G. Kiss; T. Isobe; H. Baba; S. Kubono; N. Fukuda; D. S. Ahn; Y. Shimizu; T. Sumikama; H. Suzuki; H. Takeda; P. A. Soderstrom; M. Takechi; C. G. Bruno; T. Davinson; C. J. Griffin; O. Hall; D. Kahl; P. J. Woods; P. J. Coleman-Smith; M. Labiche; I. Lazarus; P. Morrall; V. F. E. Pucknell; J. Simpson; S. L. Thomas; M. Prydderch; L. J. Harkness-Brennan; R. D. Page; I. Dillmann; R. Caballero-Folch; Y. Saito; A. Estrade; N. Nepal; F. Montes; G. Lorusso; J. Liang; S. Bae; J. Ha; B. Moon; the BRIKEN collaboration

doi:10.1016/j.nima.2019.02.004

arXiv · 1808.00732

Commissioning of the BRIKEN detector for the measurement of very exotic beta-delayed neutron emitters

A. Tolosa-Delgado·J. Agramunt·J. L. Tain·A. Algora·C. Domingo-Pardo·A. I. Morales·B. Rubio·A. Tarifeno-Saldivia·F. Calvino·G. Cortes·N. T. Brewer·B. C. Rasco·K. P. Rykaczewski·D. W. Stracener·J. M. Allmond·R. Grzywacz·R. Yokoyama·M. Singh·T. King·M. Madurga·S. Nishimura·V. H. Phong·S. Go·J. Liu·K. Matsui·H. Sakurai·G. G. Kiss·T. Isobe·H. Baba·S. Kubono·N. Fukuda·D. S. Ahn·Y. Shimizu·T. Sumikama·H. Suzuki·H. Takeda·P. A. Soderstrom·M. Takechi·C. G. Bruno·T. Davinson·C. J. Griffin·O. Hall·D. Kahl·P. J. Woods·P. J. Coleman-Smith·M. Labiche·I. Lazarus·P. Morrall·V. F. E. Pucknell·J. Simpson·S. L. Thomas·M. Prydderch·L. J. Harkness-Brennan·R. D. Page·I. Dillmann·R. Caballero-Folch·Y. Saito·A. Estrade·N. Nepal·F. Montes·G. Lorusso·J. Liang·S. Bae·J. Ha·B. Moon·the BRIKEN collaboration

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Abstract

A new detection system has been installed at the RIKEN Nishina Center (Japan) to investigate decay properties of very neutron-rich nuclei. The setup consists of three main parts: a moderated neutron counter, a detection system sensitive to the implantation and decay of radioactive ions, and gamma-ray detectors. We describe here the setup, the commissioning experiment and some selected results demonstrating its performance for the measurement of half-lives and beta-delayed neutron emission probabilities. The methodology followed in the analysis of the data is described in detail. Particular emphasis is placed on the correction of the accidental neutron background.

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A. Tolosa-Delgado, J. Agramunt, J. L. Tain, A. Algora, C. Domingo-Pardo, A. I. Morales, B. Rubio, A. Tarifeno-Saldivia, F. Calvino, G. Cortes, N. T. Brewer, B. C. Rasco, K. P. Rykaczewski, D. W. Stracener, J. M. Allmond, R. Grzywacz, R. Yokoyama, M. Singh, T. King, M. Madurga, S. Nishimura, V. H. Phong, S. Go, J. Liu, K. Matsui, H. Sakurai, G. G. Kiss, T. Isobe, H. Baba, S. Kubono, N. Fukuda, D. S. Ahn, Y. Shimizu, T. Sumikama, H. Suzuki, H. Takeda, P. A. Soderstrom, M. Takechi, C. G. Bruno, T. Davinson, C. J. Griffin, O. Hall, D. Kahl, P. J. Woods, P. J. Coleman-Smith, M. Labiche, I. Lazarus, P. Morrall, V. F. E. Pucknell, J. Simpson, S. L. Thomas, M. Prydderch, L. J. Harkness-Brennan, R. D. Page, I. Dillmann, R. Caballero-Folch, Y. Saito, A. Estrade, N. Nepal, F. Montes, G. Lorusso, J. Liang, S. Bae, J. Ha, B. Moon, the BRIKEN collaboration. 2018-08-02. Commissioning of the BRIKEN detector for the measurement of very exotic beta-delayed neutron emitters. https://doi.org/10.1016/j.nima.2019.02.004

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