17-21 July 2017
Santiago de Compostela, Facultade de Química
Europe/Madrid timezone

Commissioning of the BRIKEN β-delayed neutron detector for the study of exotic neutron-rich nuclei

17 Jul 2017, 15:25
Aula Química Física (Facultade de Química (USC))

Aula Química Física

Facultade de Química (USC)

Nuclear Physics Nuclear Physics I


Alvaro Tolosa Delgado (Instituto de Fisica Corpuscular, IFIC (CSIC-UV))


Beta-delayed neutron emission βn is the dominant decay mode of the most exotic nuclei produced along the path of the rapid neutron capture process. The correct description of the final relative abundances of heavy elements requires a accurate knowledge of delayed neutron emission probabilities Pxn of very neutron-rich nuclei [1]. Our current understanding of this nuclear decay mode lacks of enough experimental data [2]. Furthermore, the Pxn values are sensitive to the nuclear structure, and can be used as test of theoretical models [3]. With these ideas in mind the BRIKEN Collaboration has set up a powerful detection system consisting of: 1) a neutron counter with 148 3 He tubes that has high and constant detection efficiency [4], 2) the high granularity implantation-decay detector AIDA [5], 3) two CLOVER type HPGe detectors. The setup will exploit the high intensity of radioactive beams available at the focal plane of the BigRIPS separator [6] in the RIKEN Nishina Center. The setup received the first radioactive beam of isotopes close to the doubly-magic 78 Ni in Autumn 2016.In this presentation we will report on the first results of this commissioning run, including an evaluation of the performance of the setup. [1] A. Arcones and G. Martinez-Pinedo, Phys. Rev. C 83,045809 (2011) ; [2] R. M. Mumpower et al., Phys. Rev C 94, 064317 (2016); [3] M. Madurga et al., Phys. Rev. Lett. 117, 092502 (2016); [4] A. Tarifeno-Saldivia et al., J. Instrum. 12 (2017) 04006. [5] T. Davinson et al., http://www2.ph.ed.ac.uk/∼td/AIDA/; [6] T. Kubo et al., AIP Conference Proceedings 1224, 492 (2010).

Primary author

Alvaro Tolosa Delgado (Instituto de Fisica Corpuscular, IFIC (CSIC-UV))

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