Signature of a two-phonon state through its proton decay pattern

• Published in: Physical review letters Vol. 71; no. 23; pp. 3766 - 3769
• Main Authors: SCARPACI, J. A, BLUMENFELD, Y, MASSOLO, P, ALAMANOS, N, GILLIBERT, A, VAN DER WOUDE, A, CHOMAZ, P, FRASCARIA, N, GARRON, J. P, LAMEHI-RACHTI, M, LHENRY, I, ROYNETTE, J. C, SUOMIJÄRVI, T, BEAUMEL, D
• Format: Journal Article
• Language: English
• Published: Ridge, NY American Physical Society 06-12-1993
• Subjects: 663300 - Nuclear Reactions & Scattering, General- (1992-); 663450 - Heavy-Ion-Induced Reactions & Scattering- (1992-); BARYONS; CALCIUM 40 REACTIONS; CALCIUM 40 TARGET; CHARGED-PARTICLE REACTIONS; DECAY; Elastic and quasielastic scattering; ELEMENTARY PARTICLES; ENERGY LEVELS; ENERGY RANGE; Exact sciences and technology; EXCITED STATES; FERMIONS; GEV RANGE; GEV RANGE 01-10; GIANT RESONANCE; Giant resonances; HADRONS; HEAVY ION REACTIONS; INELASTIC SCATTERING; Low and intermediate energy heavy-ion reactions; Nuclear Experiment; Nuclear physics; NUCLEAR PHYSICS AND RADIATION PHYSICS; NUCLEAR REACTIONS; Nuclear reactions: general; Nuclear reactions: specific reactions; NUCLEONS; PHONONS; Physics; PROTONS; QUASI PARTICLES; RESONANCE; Resonance reactions; Resonances; SCATTERING; TARGETS; Calcium 40 target; Protons; Inelastic scattering; Phonons; MeV range 100-1000; Experimental study; Calcium 40 reactions; Giant resonance; Nuclear reactions
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.71.3766

Inelastic scattering of 50 MeV/nucleon [sup 40]Ca on [sup 40]Ca was measured in coincidence with protons in order to investigate the excitation and decay of highly excited states in [sup 40]Ca. The proton decay pattern corresponding to an excitation region around 34 MeV shows the characteristic behavior expected of the direct decay of a two-phonon state. Thus, by using this novel method, the presence of a double-phonon state built with isoscalar giant resonances in [sup 40]Ca is demonstrated.