Speaker
Adrien MATTA
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Description
Resonant states of unbound 10He have been studied by the missing mass method using the 11Li(d,3He) reaction to investigate 10He structure. This nucleus was first studied at RIKEN in a pioneering work [1] using the invariant mass method in 8He+n+n channel. A recent experiment at GSI [2] leads to compatible results for the first resonant state at 1.2 MeV . An experiment using 8He(t,p) reaction [3] shows no evidence of a state below 3 MeV above the two neutrons threshold. Spectroscopy of resonant states of 10He remains ambiguous.
The missing mass method allows to reconstruct the excitation energy spectrum independently of the decay channel. The experiment was performed at the RIKEN RIPS facility, using a secondary beam of 11Li at 50 AMeV impinging on a CD2 target. At forward angle, a wall of four MUST2 telescopes [4] was coupled with four 20 μm thick silicon detectors for light particles identification. Heavy beam-like residues were detected around zero degree using a fifth MUST2 telescope. In addition a 9Li beam at 50 AMeV was used to perform a reference experiment. 8He and 10He excitation energy spectra will be discussed and associated differential cross sections will be compared to DWBA calculations using various wave function overlaps.
[1] A.A. Korsheninnikov et al, Phys. Lett. B 326, 31 (1994).
[2] H.T. Johansson et al, Nucl. Phys. A Volume 842, 15 (2010).
[3] M.S. Golovkov et al, Phys. Lett. B Volume 672, 22 (2009).
[4] E. Pollacco et al, Eur. Phys. J. A25, 287 (2005).
Primary authors
Adrien MATTA
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Dr
Didier Beaumel
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Dr
Hideaki Otsu
(Riken Nishina Center)
Co-authors
Dr
Alexandre Obertelli
(CEA-Saclay IRFU/SPhN)
Dr
Angel Miguel Sanchez-Benitez
(Universidad de Huelva)
Dr
Daisuke Suzuki
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Dr
Emmanuel Pollacco
(CEA-Saclay IRFU/SPhN)
Dr
Evgenii Kuzmin
(NRC "Kurchatov Institute”)
Dr
Evguenii Nikolskii
(Riken Nishina Center - NRC Kurchatov Institute)
Dr
Fairouz Hammache
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Dr
Franck Delaunay
(LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3)
Dr
He Wang
(Riken Nishina Center)
Dr
Hidetada Baba
(Riken Nishina Center)
Dr
Hiroyoshi Sakurai
(Riken Nishina Center)
Dr
Iulian STEFAN
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Dr
Jean-Antoine Scarpaci
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Dr
Julien Gibelin
(LPC Caen, ENSICAEN, Université de Caen, CNRS/IN2P3)
Dr
Kenichiro Yoneda
(Riken Nishina Center)
Dr
Laurent Nalpas
(CEA-Saclay IRFU/SPhN)
Dr
Lee Jenny
(Riken Nishina Center)
Dr
Marlene Assie
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Dr
Maya Takechi
(Riken Nishina Center)
Dr
Mizuki Nishimura
(Riken Nishina Center)
Dr
Nicolas De Sereville
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Dr
Nobuaki Imai
(KEK)
Mr
Nobuyuki Kobayashi
(Department of Physics, Tokyo Institut of Technology)
Dr
Nori Aoi
(Riken Nishina Center)
Dr
Roman Wolski
(INP Krakow)
Mr
Rui-jiu Chen
(Riken Nishina Center)
Dr
Satoshi Takeuchi
(Riken Nishina Center)
Dr
Serge Franchoo
(IPN Orsay - CNRS/ IN2P3 / Universite Paris-Sud XI)
Mr
Simon Boissinot
(CEA-Saclay IRFU/SPhN)
Mr
Takahashi Koutarou
(Department of Physics, Tokyo Institut of Technology)
Prof.
Takashi Nakamura
(Department of Physics, Tokyo Institut of Technology)
Mr
Takayuki Sako
(Department of Physics, Tokyo Institut of Technology)
Dr
Tohru Motobayashi
(Riken Nishina Center)
Dr
Toshiyuki Kubo
(Riken Nishina Center)
Dr
Valerie Lapoux
(CEA-Saclay IRFU/SPhN)
Dr
Yasuhiro Togano
(Riken Nishina Center)
Mr
Yosuke Kawada
(Department of Physics, Tokyo Institut of Technology)
Dr
Yosuke Kondo
(Department of Physics, Tokyo Institut of Technology)
