Isoscalar giant resonances in the Sn nuclei and implications for the asymmetry term in the nuclear-matter incompressibility

Journal Article · Mon Mar 15 04:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.034309· OSTI ID:21386675

Li, T; Garg, U; Liu, Y; Marks, R; Nayak, B K; Madhusudhana Rao, P V; Fujiwara, M; Hashimoto, H; Nakanishi, K; Okumura, S; Yosoi, M; Ichikawa, M; Itoh, M; Matsuo, R; Terazono, T; Uchida, M; Iwao, Y; Kawabata, T; Murakami, T; Sakaguchi, H ^[1]

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1. Physics Department, University of Notre Dame, Notre Dame, Indiana 46556 (United States)

We have investigated the isoscalar giant resonances in the Sn isotopes using inelastic scattering of 386-MeV {alpha} particles at extremely forward angles, including 0 deg. We have obtained completely 'background-free' inelastic-scattering spectra for the Sn isotopes over the angular range 0 deg. -9 deg. and up to an excitation energy of 31.5 MeV. The strength distributions for various multipoles were extracted by a multipole decomposition analysis based on the expected angular distributions of the respective multipoles. We find that the centroid energies of the isoscalar giant monopole resonance (ISGMR) in the Sn isotopes are significantly lower than the theoretical predictions. In addition, based on the ISGMR results, a value of K{sub {tau}}=-550+-100 MeV is obtained for the asymmetry term in the nuclear incompressibility. Constraints on interactions employed in nuclear structure calculations are discussed on the basis of the experimentally obtained values for K{sub {infinity}} and K{sub {tau}}.

• OSTI ID: 21386675
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 3 Vol. 81; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ANGULAR DISTRIBUTION
ASYMMETRY
CHARGED PARTICLES
CHEMICAL REACTIONS
DECOMPOSITION
DISTRIBUTION
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
FORECASTING
GIANT RESONANCE
INELASTIC SCATTERING
INTERACTIONS
IONIZING RADIATIONS
ISOTOPES
MATTER
MEV RANGE
MEV RANGE 100-1000
MONOPOLES
MULTIPOLES
NUCLEAR MATTER
NUCLEAR STRUCTURE
NUCLEI
RADIATIONS
RESONANCE
SCATTERING
SPECTRA
TIN ISOTOPES