Probing pre-formed alpha particles in the ground state of nuclei

J.A. Scarpaci; M. Fallot; D. Lacroix; M. Assié; L. Lefebvre; N. Frascaria; D. Beaumel; C. Bhar; Y. Blumenfeld; A. Chbihi; Ph. Chomaz; P. Désesquelle; J. Frankland; H. Idbarkach; E. Khan; J.L. Laville; E. Plagnol; E.C. Pollacco; P. Roussel-Chomaz; J.C. Roynette; A. Shrivastava; T. Zerguerras

HAL : in2p3-00601930, version 1

DOI : 10.1142/S0218301311019222

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2nd Workshop on "State of the Art in Nuclear Cluster Physics" (SOTANCP2), Bruxelles : Belgium (2010)

Probing pre-formed alpha particles in the ground state of nuclei

J.A. Scarpaci¹, M. Fallot^{1, 2}, D. Lacroix³, M. Assié¹, L. Lefebvre¹, N. Frascaria¹, D. Beaumel¹, C. Bhar¹, Y. Blumenfeld¹, A. Chbihi³, Ph. Chomaz^{3, 4}, P. Désesquelle^{1, 5}, J. Frankland³, H. Idbarkach¹, E. Khan¹, J.L. Laville³, E. Plagnol^{1, 6}, E.C. Pollacco⁴, P. Roussel-Chomaz^{3, 7}, J.C. Roynette¹, A. Shrivastava¹, T. Zerguerras¹

(2011)

In this proceeding we report on alpha particle emission through the nuclear break-up in the reaction 40Ca on a 40Ca target at 50A MeV. It is observed that alpha particles are emitted to the continuum with very specific angular distribution during the reac- tion. The alpha particle properties seem to be compatible with an alpha cluster in the daughter nucleus that is perturbed by the short range nuclear attraction of the collision partner and emitted as described by a time-dependent theory. This mechanism offers new possibilities to study alpha particle properties in the nuclear medium.

1 :	IPNO - Institut de Physique Nucléaire d'Orsay

2 :	SUBATECH - Laboratoire SUBATECH Nantes

3 :	GANIL - Grand Accélérateur National d'Ions Lourds

4 :	IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (ex DAPNIA)

5 :	CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

6 :	APC - AstroParticule et Cosmologie

7 :	CEA/DSM - CEA/DSM Centre de Saclay

équipe(s) de recherche : APC - Cosmologie et gravitation

Thème(s)

Physique/Physique Nucléaire Expérimentale


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Soumis le : Mardi 21 Juin 2011, 13:47:09
Dernière modification le : Vendredi 3 Août 2012, 17:58:31