Speaker
Mr
Yuki Kubota
(Center for Nuclear Study, The University of Tokyo)
Description
Dineutron correlation is one of the symbolic phenomena expected to appear in neutron drip-line nuclei.
It has been studied using different approaches, such as the transfer reaction and the break up reaction.
However, currently available data seem to be insufficient to study the neutron-neutron correlation in terms of
(i) the decomposition of high-angular-momentum components,
(ii) the extraction of a core excitation,
(iii) and the effect of final state interactions (FSIs) [1].
In the present study,
(i) the MINOS [2] was used for higher luminosity,
(ii) $\gamma$ rays were detected to tag the core excitation,
(iii) and the quasi-free $(p,pn)$ reaction was employed to minimize the FSI.
In order to determine the momentum distribution of two valence neutrons, the kinematically complete measurement was performed. The opening angle between the two neutrons was reconstructed from the measured momentum vectors of all the particles.
The experiment was carried out by using the SAMURAI spectrometer [3] combined with the liquid hydrogen target system MINOS.
Momentum vectors of a knocked-out neutron and a recoil proton were respectively determined by the neutron detector WINDS [4] and a recoil proton detector setup, developed for this project.
Decay neutrons and heavy fragments were momentum analyzed by the neutron detector NEBULA and the SAMURAI spectrometer, respectively.
The details of experimental setup and results will be presented in this talk.
[1] Y. Kikuchi et al., Phys. Rev. C 87, 034606 (2013).
[2] A. Obertelli et al., Eur. Phys. Jour. A 50, 8 (2014).
[3] T. Kobayashi et al., Nucl. Instr. Meth. B 317, 294(2013).
[4] K. Yako et al., RIKEN Accel. Prog. Rep 45, 137 (2012).
Primary author
Mr
Yuki Kubota
(Center for Nuclear Study, The University of Tokyo)
Co-authors
Dr
Alain Delbart
(CEA, Saclay)
Dr
Alain Gillibert
(CEA, Saclay)
Dr
Alexandre Obertelli
(CEA, Saclay)
Dr
Anna Corsi
(CEA, Saclay)
Dr
Arnaud Giganon
(CEA, Saclay)
Ms
Atsumi Saito
(Tokyo Institute of Technology)
Ms
Ayaka Ohkura
(Kyushu University)
Dr
Christoph Caesar
(Technische Universität Darmstadt)
Dr
Clémentine Santamaria
(CEA, Saclay)
Ms
Dahee Kim
(Ehwa Womans University)
Dr
Denis Calvet
(CEA, Saclay)
Dr
Emmanuel Pollacco
(CEA, Saclay)
Dr
Freddy Flavigny
(IPN, Orsay)
Dr
Gilles Authelet
(CEA, Saclay)
Dr
Hideaki Otsu
(RIKEN Nishina Center)
Dr
Hidetada Baba
(RIKEN Nishina Center)
Dr
Hiromi Sato
(RIKEN Nishina Center)
Dr
Jean-Marc Gheller
(CEA, Saclay)
Dr
Jean-Yves Roussé
(CEA, Saclay)
Dr
Julien Gibelin
(LPC, Caen)
Mr
Jumpei Yasuda
(Kyushu University)
Mr
Jun Feng
(Peking University)
Mr
Junichi Tsubota
(Tokyo Institute of Technology)
Dr
Juzo Zenihiro
(RIKEN Nishina Center)
Dr
Kenichiro Yoneda
(RIKEN Nishina Center)
Mr
Kunihiko Hasegawa
(Tohoku University)
Dr
László Stuhl
(RIKEN Nishina Center)
Dr
Masaki Sasano
(RIKEN Nishina Center)
Mr
Masami Sako
(RIKEN Nishina Center)
Dr
Masanori Dozono
(Center for Nuclear Study, The University of Tokyo)
Dr
Miguel Marqués
(LPC Caen)
Ms
Mizuki Shikata
(Tokyo Institute of Technology)
Mr
Motoki Kobayashi
(Center for Nuclear Study, The University of Tokyo)
Mr
Munemi Tabata
(Kyushu Univeristy)
Dr
Nigel Orr
(LPC Caen)
Dr
Nobuyuki Kobayashi
(Department of Physics, The University of Tokyo)
Mr
Noritsugu Nakatsuka
(Kyoto University)
Dr
Satoshi Sakaguchi
(Kyushu University)
Mr
Sebastian Reichert
(Technische Universität München)
Dr
Shinsuke Ota
(Center for Nuclear Study, The University of Tokyo)
Mr
Shumpei Koyama
(Department of Physics, The University of Tokyo)
Mr
Shunsuke Kawakami
(University of Miyazaki)
Dr
Stefanos Paschalis
(Technische Universität Darmstadt)
Dr
Tadaaki Isobe
(RIKEN Nishina Center)
Prof.
Takashi Nakamura
(Tokyo Institute of Technology)
Dr
Takuya Miyazaki
(Department of Physics, The University of Tokyo)
Dr
Tohru Motobayashi
(RIKEN Nishina Center)
Dr
Tomohiro Uesaka
(RIKEN Nishina Center)
Mr
Tomoyuki Ozaki
(Tokyo Institute of Technology)
Prof.
Toshio Kobayashi
(Tohoku University)
Dr
Toshiyuki Sumikama
(Tohoku University)
Dr
Valerii Panin
(RIKEN Nishina Center)
Dr
Valérie Lapoux
(CEA, Saclay)
Dr
Yasuhiro Togano
(Tokyo Institute of Technology)
Mr
Yasutaka Nishio
(Kyushu University)
Dr
Yohei Shimizu
(RIKEN Nishina Center)
Mr
Yoshihisa Kanaya
(University of Miyazaki)
Dr
Yosuke Kondo
(Tokyo Institute of Technology)
Mr
Yu Kiyokawa
(Center for Nuclear Study, The University of Tokyo)
Dr
Yukie Maeda
(University of Miyazaki)
Mr
Yusuke Shindo
(Kyushu University)
Dr
Zaihong Yang
(RIKEN Nishina Center)
Dr
Zeren Korkulu
(MTA Atomki)
