Resonating-group-method study of. cap alpha. +/sup 40/Ca elastic scattering and /sup 44/Ti structure

Journal Article · Tue Nov 01 04:00:00 EST 1988 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.38.2063· OSTI ID:6720981

Wada, T; Horiuchi, H

The ..cap alpha..+/sup 40/Ca elastic scattering cross sections in the energy range from 29.0 to 61.0 MeV are shown to be well reproduced by the resonating-group method by introducing a phenomenological imaginary potential. The local potential equivalent to the nonlocal potential of the resonating-group method is found to be very close to the optical potential of Delbar et al. which fits the scattering data well in a wide energy range. Since the optical potential of Delbar et al. is the so-called unique optical potential which is free from the discrete ambiguity, this result means that the resonating-group method is powerful and reliable for the study of the internucleus interaction. By calculating the bound and quasibound level spectra by the same ..cap alpha..+/sup 40/Ca resonating-group method, it is found that the lowest positive parity rotational band is located near the observed ground rotational band of /sup 44/Ti. In addition, when we use other effective two-nucleon forces so as to locate the calculated lowest 0/sup +/ state near the observed excited 0/sup +/ state with the excitation energy 8.54 or 11.2 MeV, which has large ..cap alpha.. strength, the fitting of the elastic scattering data by the resonating-group method is found to be very bad. These results force us to regard that the structure of the /sup 44/Ti ground band as containing a large amount of ..cap alpha..+/sup 40/Ca clustering component. However our present resonating-group method predicts the appearance of the negative parity rotational band with its bandhead 1/sup -/ state below the excitation energy 10 MeV although there have been reported no such experimental indications at all of this.

• Research Organization: Research Institute for Fundamental Physics, Kyoto University, Kyoto 606, Japan
• OSTI ID: 6720981
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 38:5; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

653001* -- Nuclear Theory-- Nuclear Structure
Moments
Spin
& Models
653003 -- Nuclear Theory-- Nuclear Reactions & Scattering
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR MOMENTUM
BETA DECAY RADIOISOTOPES
BOUND STATE
CALCIUM 40 TARGET
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
CROSS SECTIONS
ELASTIC SCATTERING
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXCITED STATES
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIE GROUPS
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NUCLEAR MODELS
NUCLEAR POTENTIAL
NUCLEAR REACTIONS
NUCLEI
OPTICAL MODELS
PARITY
PARTICLE PROPERTIES
POTENTIALS
RADIOISOTOPES
RESONATING-GROUP METHOD
ROTATIONAL STATES
SCATTERING
SHELL MODELS
SPIN
SU GROUPS
SU-3 GROUPS
SYMMETRY GROUPS
TARGETS
TITANIUM 44
TITANIUM ISOTOPES
VARIATIONAL METHODS
YEARS LIVING RADIOISOTOPES