Isoscalar giant dipole resonance in 90Zr, 116Sn, 144Sm and 208Pb excited by 240 MeV α particle scattering

✍ Scribed by H.L. Clark; Y.-W. Lui; D.H. Youngblood; K. Bachtr; U. Garg; M.N. Harakeh; N. Kalantar-Nayestanaki

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 238 KB
• Volume: 649
• Category: Article
• ISSN: 0375-9474
• DOI: 10.1016/s0375-9474(99)00039-1

✦ Synopsis

The giant resonance regions ofg°zr, UfSn, t44Sm and 2°spb were investigated using 240 MeV et particle scattering at small angles including 0 °. E1 strengths corresponding to 91+11%, 89_+10%, 105+12% and 95+13% of the isoscalar E1 energy-weighted sum rule were identified between 18<_E~<31 MeV, 16<_F_~<30 MeV, 15<_E~<_27 MeV and 15<_.Ex-<25 MeV with centroid energies of 24.8_+0.4 MeV, 22.5_+0.3 MeV, 21.6_+0.3 MeV and 19.3_+0.3 MeV and rms widths of 3.2_+0.2 MeV, 3.5_+0.2 MeV, 3.2_+0.2 MeV and 2.5_+0.2 MeV for 9°Zr, lt6Sn, t*~Sm and 2°spb, respectively. Parameters obtained for the isoscalar giant monopole resonance, isoscalar giant quadrupole resonance and high energy octupole resonance are in agreement with accepted values.