Investigation of He6 cluster structures

L. Giot, P. Roussel-Chomaz, C. E. Demonchy, W. Mittig, H. Savajols, N. Alamanos, F. Auger, A. Gillibert, C. Jouanne, V. Lapoux, L. Nalpas, E. C. Pollacco, J. L. Sida, F. Skaza, M. D. Cortina-Gil, J. Fernandez-Vasquez, R. S. Mackintosh, A. Pakou, S. Pita, A. Rodin, S. Stepantsov, G. M. Ter Akopian, K. Rusek, I. J. Thompson, and R. Wolski
Phys. Rev. C 71, 064311 – Published 23 June 2005

Abstract

The α+2n and t+t clustering of the He6 ground state were investigated by means of the transfer reaction He6(p,t)He4 at 25 MeV/nucleon. The experiment was performed in inverse kinematics at GANIL with the SPEG spectrometer coupled to the MUST array. Experimental data for the transfer reaction were analyzed by a distorted wave Born approximation (DWBA) calculation, including the two neutrons and the triton transfer. The couplings to the He6He4+2n breakup channels were taken into account with a polarization potential deduced from a coupled-discretized-continuum channels analysis of the He6+H1 elastic scattering measured at the same time. The influence on the calculations of the α+t exit potential and of the triton sequential transfer is discussed. The final calculation gives a spectroscopic factor close to one for the α+2n configuration as expected. The spectroscopic factor obtained for the t+t configuration is much smaller than the theoretical predictions.

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  • Received 16 January 2005

DOI:https://doi.org/10.1103/PhysRevC.71.064311

©2005 American Physical Society

Authors & Affiliations

L. Giot*,†, P. Roussel-Chomaz, C. E. Demonchy, W. Mittig, and H. Savajols

  • GANIL, BP 5027, F-14076 Caen, France

N. Alamanos, F. Auger, A. Gillibert, C. Jouanne, V. Lapoux, L. Nalpas, E. C. Pollacco, J. L. Sida, and F. Skaza

  • DSM/Dapnia CEA Saclay, F-91191 Gif-sur-Yvette, France

M. D. Cortina-Gil and J. Fernandez-Vasquez

  • Universidad de Santiago de Compostela, E-15706 Santiago de Compostela, Spain

R. S. Mackintosh

  • Department of Physics and Astronomy, The Open University, Milton Keynes, MK7 6AA, United Kingdom

A. Pakou

  • University of Ioannina, GR-45110 Ioannina, Greece

S. Pita

  • APC, 11 place Marcelin Berthelot, F-75231 Paris, France

A. Rodin, S. Stepantsov, and G. M. Ter Akopian

  • Flerov Laboratory of Nuclear Reactions, JINR, Dubna RU-141980, Russia

K. Rusek

  • Department of Nuclear Reactions, The Andrzej Soltan Institute for Nuclear Studies, Hoza 69, PL-00-681 Warsaw, Poland

I. J. Thompson

  • University of Surrey, Guildford, GU2 7XH, United Kingdom

R. Wolski

  • The Henryk Niewodniczański Institute of Nuclear Physics PAN, Radzikowskiego 152, PL-31-342 Cracow, Poland

  • *Present address: GSI, Planckstr.1, D-64291 Darmstadt, Germany.
  • Electronic address: l.giot@gsi.de

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Issue

Vol. 71, Iss. 6 — June 2005

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