Evidence for a Three-Phonon Giant Resonance State in $^{40}$Ca Nuclei

M. Fallot; J. A. Scarpaci; N. Frascaria; Y. Blumenfeld; A. Chbihi; Ph. Chomaz; P. Désesquelles; J. Frankland; E. Khan; J.L. Laville; E. Plagnol; E. C. Pollacco; P. Roussel-Chomaz; J. C. Roynette; A. Shrivastava; T. Zerguerras

HAL : in2p3-00120768, version 1

DOI : 10.1103/PhysRevLett.97.242502

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Physical Review Letters 97 (2006) 242502

Evidence for a Three-Phonon Giant Resonance State in $^{40}$Ca Nuclei

M. Fallot¹, J. A. Scarpaci¹, N. Frascaria¹, Y. Blumenfeld¹, A. Chbihi², Ph. Chomaz², P. Désesquelles¹, J. Frankland², E. Khan¹, J.L. Laville², E. Plagnol¹, E. C. Pollacco³, P. Roussel-Chomaz², J. C. Roynette¹, A. Shrivastava¹, T. Zerguerras¹

INDRA Collaboration(s)

(2006)

Inelastic scattering of $^{40}$Ca on $^{40}$Ca at 50 MeV/A has been measured in coincidence with protons at the GANIL facility. The SPEG spectrometer was associated with 240 CsI(Tl) scintillators of the INDRA 4$\pi$ array, allowing for the measurement of complete decay events. The missing energy method was applied to these events. For events with excitation energy between 42 and 55 MeV, a direct decay branch by three protons towards the low energy states of $^{37}$Cl gives the first evidence for a 3-phonon state built with giant resonances.

1 :	IPNO - Institut de Physique Nucléaire d'Orsay

2 :	GANIL - Grand Accélérateur National d'Ions Lourds

3 :	DAPNIA - Département d'Astrophysique, de physique des Particules, de physique Nucléaire et de l'Instrumentation Associée

Thème(s)

Physique/Physique Nucléaire Expérimentale


in2p3-00120768, version 1
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Contributeur : Michel Lion <>
Soumis le : Lundi 18 Décembre 2006, 10:50:00
Dernière modification le : Mardi 10 Juillet 2007, 08:57:31