Papers - AKIMUNE Hidetoshi
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ATOMIC CHARGE-EXCHANGE BETWEEN FAST HELIUM-IONS AND TARGETS FROM CARBON TO BISMUTH AT BETA=0.36 Reviewed
K DENNIS, H AKIMUNE, GPA BERG, S CHANG, B DAVIS, M FUJIWARA, MN HARAKEH, J JANECKE, J LIU, K PHAM, DA ROBERTS, EJ STEPHENSON
PHYSICAL REVIEW A 50 ( 5 ) 3992 - 3999 1994.11
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Looking for the isoscalar giant dipole resonance in 208Pd using inelastic a scattering at and near O° Reviewed
B. F. Davis, H. Akimune, A. Bacher, G. P.A. Berg, M. Fujiwara, U. Garg, M. N. Harakeh, J. Jänecke, J. Ussanti, K. Pham, W. Reviol, D. Roberts, E. J. Stephenson, Y. Wang
Nuclear Physics, Section A 569 ( 1-2 ) 325 - 332 1994.3
Joint Work
The isoscalar giant dipole resonance (ISGDR) in 208Pb has been investigated using inelastic scattering of 200 MeV α particles at and near 0° where the angular distribution of the ISGDR can be clearly differentiated from other modes. The "difference of spectra" technique was employed to separate the contribution from the high-energy octupole resonance (HEOR). Results from a preliminary analysis of the data are consistent with the expected positions of the ISGOR and HEOR, as well as their expected angular distributions near 0°. © 1994.
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Microscopic structure of the Gamow-Teller resonance in 208Bi Reviewed
H. Akimune, I. Daito, Y. Fujita, M. Fujiwara, M. B. Greenfield, M. N. Harakeh, T. Inomata, J. Jänecke, K. Katori, S. Nakayama, H. Sakai, Y. Sakemi, M. Tanaka, M. Yosoi
Nuclear Physics, Section A 569 ( 1-2 ) 255 - 265 1994.3
Joint Work
The 208Pb(3He,t)208Bi reaction has been studied with the RCNP ring cyclotron at E(3He) = 450 MeV using the magnetic spectrometer Grand Raiden at θ = 0°. The Gamow-Teller resonance is strongly excited at this bombarding energy. Its microscopic structure has been investigated by measuring the direct proton decay to the neutron-hole states in 207Pb. The branching ratio for proton emission of a few % is much smaller than that for the decay of the isobaric analog state. The total width of the Gamow-Teller resonance as well as its total and partial escape widths have been determined. Several recent theoretical estimates for the escape width differ from the measured values by factors of ~ 2.5. © 1994.
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(HE-3,T) CHARGE-EXCHANGE REACTIONS AT E(HE-3)=450 MEV, THETA=0-DEGREES Reviewed
H AKIMUNE, DAITO, I, Y FUJITA, M FUJIWARA, MB GREENFIELD, MN HARAKEH, T INOMATA, J JANECKE, K KATORI, S NAKAYAMA, H SAKAI, Y SAKEMI, M TANAKA, M YOSOI
NUCLEAR PHYSICS A 569 ( 1-2 ) C245 - C254 1994.3
Joint Work
Publisher：ELSEVIER SCIENCE BV
Spin-isospin excitations in nuclei have been studied by means of the (He-3,t) reactions at 450 MeV on the targets Be-9, (nat)C, Si-28, Ni-58, Ni-62, Zr-90, Sn-118, Sn-120, 124Sn, and Sm-154. The new spectrometer ''Grand Raiden'' was employed for the (He-3,t) study for the first time. Observed (He-3,t) spectra at 0-degrees show remarkable similarity with those from the (p,n) results at intermediate energies, suggesting a simple direct reaction mechanism for the (He-3,t) reaction at 450 MeV. The Gamow-Teller (GT) resonances and the spin-flip DELTAL = 1 resonances are excited very strongly. A fine structure of the GT resonances in medium-heavy nuclei is observed with an energy resolution of 210 keV. It is demonstrated that the (He-3,t) reaction at 450 MeV is a powerful tool to study the spin-isospin excitations in nuclei.
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LOOKING FOR THE ISOSCALAR GIANT-DIPOLE RESONANCE IN PB-208 USING INELASTIC ALPHA-SCATTERING AT AND NEAR 0-DEGREES Reviewed
BF DAVIS, H AKIMUNE, A BACHER, GPA BERG, M FUJIWARA, U GARG, MN HARAKEH, J JANECKE, J LISSANTI, K PHAM, W REVIOL, D ROBERTS, EJ STEPHENSON, Y WANG
NUCLEAR PHYSICS A 569 ( 1-2 ) C325 - C332 1994.3
Joint Work
Publisher：ELSEVIER SCIENCE BV
The isoscalar giant dipole resonance (ISGDR) in Pb-208 has been investigated using inelastic, scattering of 200 MeV a particles at and near 0-degrees where the angular distribution of the ISGDR can be clearly differentiated from other modes. The ''difference of spectra'' technique was employed to separate the contribution from the high-energy octupole resonance (HEOR). Results from a preliminary analysis of the data are consistent with the expected positions of the ISGDR and HEOR, as well as their expected angular distributions near 0-degrees.
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Looking for the Isoscalar Giant Dipole Resonance in Inelastic $\alpha$ Scattering at and Near 0$^\circ$ Reviewed
B. F. Davis, U. Garg, W. Reviol, A. D. Bacher, G. P. A. Berg, E. J. Stephenson, Y. Wang, J. Janecke, K. Pham, D. Roberts, M. N. Harakeh, H. Akimune, M. Fujiwara
Bull.Am.Phys.Soc. 38 No.2, 1052, N7 9 1993.11
Joint Work