K. Kawase

Isotopic dependence of the giant monopole resonance in the even-A Sn112-124 isotopes and the asymmetry term in nuclear incompressibility

The strength distributions of the giant monopole resonance (GMR) have been measured in the even-A Sn isotopes (A=112-124) with inelastic scattering of 400-MeV alpha particles in the angular range 0 degrees -8.5 degrees . We find that the experimentally observed GMR energies of the Sn isotopes are lower than the values predicted by theoretical calculations that reproduce the GMR energies in 208Pb and 90Zr very well. From the GMR data, a value of Ktau = -550 +/- 100 MeV is obtained for the asymmetry term in the nuclear incompressibility.

Polymer Morphological Change Induced by Terahertz Irradiation

As terahertz (THz) frequencies correspond to those of the intermolecular vibrational modes in a polymer, intense THz wave irradiation affects the macromolecular polymorph, which determines the polymer properties and functions. THz photon energy is quite low compared to the covalent bond energy; therefore, conformational changes can be induced “softly,” without damaging the chemical structures. Here, we irradiate a poly(3-hydroxybutylate) (PHB) / chloroform solution during solvent casting crystallization using a THz wave generated by a free electron laser (FEL). Morphological observation shows the formation of micrometer-sized crystals in response to the THz wave irradiation. Further, a 10−20% increase in crystallinity is observed through analysis of the infrared (IR) absorption spectra. The peak power density of the irradiating THz wave is 40 MW/cm2, which is significantly lower than the typical laser intensities used for material manipulation. We demonstrate for the first time that the THz wave effectively induces the intermolecular rearrangement of polymer macromolecules.

Isoscalar giant resonance strengths in 32 S and possible excitation of superdeformed and 28 Si + α cluster bandheads

Isoscalar giant resonances and low spin states in

Nature of 10 MeV state in 12C

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1 ms Pulse Beam Generation and Acceleration by Photocathode Radio Frequency Gun and Superconducting Accelerator

S have been measured with inelastic

Gamow-Teller strength for the analog transitions to the first T=1/2,J(pi)=3/2(-) states in (13)C and (13)N and the implications for type Ia supernovae

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Direct proton decay of the isoscalar giant dipole resonance in 208Pb

scattering at extremely forward angles including zero degrees at E

Performances of THz cameras with enhanced sensitivity in sub-terahertz region

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Image reconstruction method for non-synchronous THz signals

= 386 MeV. By applying the multipole decomposition analysis, various excited states are classified according to their spin and parities (J

Cluster states in 11B and 13C

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