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SAMURAI International Collaboration Workshop 2019

30–31 Aug 2019
Rikkyo University
Asia/Tokyo timezone

Contribution List

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  1. 15. Opening remark
    Takashi Nakamura (Tokyo Institute of Technology)
    30/08/2019, 10:00
  2. 17. STRASSE: a silicon tracker project for quasi free scattering at RIBF
    Yelei Sun (CEA Saclay)
    30/08/2019, 10:05
  3. 16. Development of high-granularity neutron detector array HIME
    Takashi Nakamura (Tokyo Institute of Technology)
    30/08/2019, 10:25
  4. 18. Status of TUDa funding application for construction of HIME and future experiments at SAMURAI
    Thomas Aumann (Technische Universitaet Darmstadt)
    30/08/2019, 10:45
  5. 19. TBA
    Nigel Orr (LPC-Caen)
    30/08/2019, 11:25
  6. 20. TBA
    He Wang (RIKEN Nishina Center)
    30/08/2019, 11:55
  7. 3. Invariant-Mass Spectroscopy at the low-Z Shore of the Island of Inversion
    Dr Dominic Rossi (TU Darmstadt)
    30/08/2019, 13:30

    The so-called “island of inversion” is a region in the nuclear landscape where shell-structure changes are observed and in particular the magic neutron number at N=20 vanishes. For those nuclei at Z=10−12 and around N=20, the shell gap at N=20 quenches and pf-shell intruder configurations become important. We address the question how strong such configurations are for very neutron-rich but Z=9...

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  8. 4. Study of unbound nuclei $^{33}$Ne via one-proton knockout reactions
    Mr Hyunwoo Chae (Seoul National University)
    30/08/2019, 13:50

    The magicity of N=20 in the vicinity of Ne, Na, and Mg isotopes vanishes due to pf-shell intruder configuration, which is called 'island of inversion' [1-3]. In recent years, shell evolution of Ne isotopes in this region is emerging topic of interest [4,5]. Nevertheless, there is no observed state of $^{33}$Ne.
    It is only known that $^{33}$Ne is unbound nuclei [6] and the 1n separation...

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  9. 6. Analysis Update on the Lifetime Measurement of the $^\text{26}$O g.s. at SAMURAI
    Ms Sonja Storck (TU Darmstadt)
    30/08/2019, 14:10

    A recent experiment suggests that the ground state of the neutron-unbound nucleus $^\text{26}$O could have a lifetime in the pico-second regime. This would constitute the first case of a radioactive
    decay via neutron emission, if this value can be confirmed.

    In Dezember 2016, the S20 experiment using a new measurement method to determine the decay lifetime
    of the $^\text{26}$O ground state...

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  10. 21. Measurement of isotopic production cross sections of the proton- and deuteron-induced spallation reactions on 93Zr at 209 MeV/u
    Dr Shoichiro Kawase (Kyusyu University)
    30/08/2019, 14:30
  11. 22. TBA (Fission)
    Masaki Sasano (RIKEN Nishina Center)
    30/08/2019, 14:50
  12. 23. TBA (RIKEN status)
    Ken-ichiro YONEDA (RIKEN Nishina Center)
    30/08/2019, 15:30
  13. 9. Analysis of 8He(p, p alpha)4n
    Dr Meytal Duer (TU Darmstadt)
    30/08/2019, 15:50

    Details will be given on the current status of the analysis of the 8He(p, p alpha)4n experiment.

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  14. 24. quasi-free (p,pn) reaction with Borromean nuclei 11Li,14Be, and 17B
    Zaihong Yang (RIKEN)
    30/08/2019, 16:10
  15. 25. Status report of S24 experiment: Investigation of unbound states in neutron-deficient 66Se
    Valerii Panin (RIKEN, Spin-isospin laboratory)
    30/08/2019, 16:30
  16. 27. HI-α invariant mass spectroscopy
    Hideaki Otsu (RIKEN Nishina Center)
    30/08/2019, 16:50
  17. 28. TBA (RIBFDAQ)
    Hidetada Baba (RIKEN)
    31/08/2019, 09:30
  18. 29. TBA (SAMURAI DAQ)
    Masaki Sasano (RIKEN Nishina Center)
    31/08/2019, 10:00
  19. 30. TBA
    Yosuke KONDO (Tokyo Institute of Technology)
    31/08/2019, 10:50
  20. 31. TBA
    Dr Junki Tanaka (Riken, Nishina Center)
    31/08/2019, 11:20
  21. 32. TBA (SEASTAR)
    Pieter Doornenbal (RIKEN)
    31/08/2019, 13:20
  22. 7. Study of unbound excited states in $^{17}$C
    Dr Sunji Kim
    31/08/2019, 13:40

    A study of unbound excited states in $^{17}$C through one-neutron knockout of $^{18}$C at the energy of 245 MeV/nucleon on a carbon target was performed using the SAMURAI spectrometer. Relative energy spectrum of unbound $^{17}$C was reconstructed from momentum vectors of $^{16}$C fragments and neutrons. The relative energy spectrum was characterized by six resonances at $E_{\rm rel}$ = 0.54,...

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  23. 34. Study of Gamow-Teller transition in neutron-rich 11Li
    Dr Yuma Hirai (Kyusyu University)
    31/08/2019, 14:00
  24. 35. Analysis status of S31: Probing isospin dependence of nucleon correlations using (p,pN) reaction
    Thomas Pohl (TU Darmstadt)
    31/08/2019, 14:20
  25. 26. Nuclear breakup and Coulomb dissociation of 9C nucleus studied at RIBF RIKEN
    Tohru Motobayashi (RIKEN Nishina Center)
    31/08/2019, 14:40
  26. 36. Experimental study of density dependent symmetry energy at RIBF-SPiRIT
    Tadaaki Isobe (RIKEN)
    31/08/2019, 15:30
  27. 37. Status report of s034: study of 7H and the tetraneutron using 8He(p,2p) reaction
    Zaihong Yang (RIKEN)
    31/08/2019, 15:50
  28. 2. Cluster structure of neutron-rich Beryllium isotopes investigated by cluster quasi-free scattering reaction
    Pengjie Li (HKU)
    31/08/2019, 16:10

    Alpha clustering is the key cornerstone for the complete understanding of the structure of nuclei and fundamental nuclear interactions. So far alpha-particle clustering has dominated cluster states studies among all other possible partitioning. While it is known for long as an important feature of stable N=Z nuclei [1], its existence in exotic nuclei with large imbalance of proton and neutron...

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  29. 12. Status report of dipole strength measurement performed in S09 and ImPACT
    Yasuhiro Togano (Rikkyo University)
    31/08/2019, 16:30

    I will give a status report on the analysis of the SAMURAI09 experiment.

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  30. 5. Analysis update on the low-energy dipole response of the halo nuclei $^{6,8}$He
    Christopher Lehr (TU Darmstadt)
    31/08/2019, 16:50

    In July 2017, the SAMURAI37 experiment was performed with the purpose of measuring the multi-neutron decay of $^6$He and $^8$He after heavy-ion-induced electromagnetic excitation in complete kinematics to study the dipole response of these nuclei.
    The combination of the neutron detectors NEBULA and NeuLAND at the SAMURAI setup and the high beam intensities available at RIBF made the...

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  31. 38. Closing remarks
    Takashi Nakamura (Tokyo Institute of Technology)
    31/08/2019, 17:10
  32. 14. Opening remark
    Takashi Nakamura (Tokyo Institute of Technology)
  33. 8. Search for preformed-alpha particles via alpha-knockout reaction from alpha-decay nuclei
    Dr Junki Tanaka (Riken, Nishina Center)

    we would like to propose an experiment to observe the preformed α particles using the quasi-free α-knockout reaction from α-decay nuclei.

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  34. 13. Status of NEBULA-Plus and Possible Future Experiments
    Nigel Orr (LPC-Caen)

    In this presentation we will briefly update the collaboration on the status of the NEBULA- Plus upgrade of the NEBULA array – the instrumentation aspect of the French ANR funded project “EXPAND”. Possible future experiments using the upgraded array will be discussed, including those that may be proposed at the RIBF Dec 2019 NPAC.

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  35. 11. Status report of the SAMURAI21 experiment
    Yosuke KONDO (Tokyo Institute of Technology)

    I will report the status of the SAMURAI21 experiment that is dedicated for the observation of the unbound nuclei 27O and 28O. In the presentation, I also want to discuss a possible new measurement for 27O as described in the pre-proposal.

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  36. 10. Study on tensor correlation in neutron-rich nuclei via (p,pd) reaction
    He Wang (Tokyo Institute of Technology)

    Tensor interaction and associated correlation play primary roles in understanding the nuclear structure and thus attracts much attentions in both experimental and theoretical studies in modern nuclear physics. Recently, (p,pd) reaction at high energy is found to be a powerful tool to study tensor correlation in proton-neutron pairs [1]. In the present study, we would like to investigate the...

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  37. 33. TBA (S40+HIME)
    Takashi Nakamura (Tokyo Institute of Technology)

    HIME

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