Bonding potential and the mechanism of quasi-molecular states

Satpathy, L.; Sarangi, Pulak; Faessler, A.

doi:10.1088/0305-4616/12/3/008

Cited by 25 publications

(33 citation statements)

References 20 publications

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“…Taking the rotational spacing of the 6n LCC as h /2+=22 keV (as predicted by the CCM) and that of two touching C nuclei in the elastic band as 90 keV results in a band crossing at E 50 MeV for L=16 [6], confirming observation of the L=14,16 dominant angular momenta [2]. An alternative explanation is o8'ered by Satpathy and Sarangi, who have applied a dynamic bonding-potential model [10] to the 02 +02 channel [11], as an extension of their dinucleus rotation-vibration picture of C+ C scattering resonances [12]. An increase in cross section at E, =33.09 MeV with L=14 is predicted, precluding the necessity for population of any compound state in Mg.…”

Section: Introductionsupporting

confidence: 53%

C12+12C ‘‘6

Chappell

Watson²,

Fox³

et al. 1995

Phys. Rev. C

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The inelastic scattering of C+ C to states above the decay threshold into 6o. particles has been studied at center-of-mass energies in the range 25 -40 MeV. We observe strong resonant behavior in the 02 +3i and 0~+02 channels around 32.5 MeV with strikingly enhanced cross sections at 90' in the center of mass. Further measurements suggest that the 02 +(Os ) channel also resonates in this energy region. These data are compared to recent band crossing model calculations and the shape eigenstate interpretation.

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Section: Introductionsupporting

confidence: 53%

C12+12C ‘‘6

Chappell

Watson²,

Fox³

et al. 1995

Phys. Rev. C

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“…[9] also lead to these observations. However, the resonance states can originate not only from the potential pocket but also from the barrier top region provided absorption is not large in the barrier region and the barrier is reasonably Aat The characterization of resonances and their role in the analysis of scattering amplitude is an important aspect of potential scattering.…”

Section: Introductionmentioning

confidence: 61%

“…Khosla et al [8] improved the orbiting cluster model by incorporating the generalized moment of inertia in the two-central-shell model. Satpathy and co-workers [9] have studied the nuclear molecular resonances using larger range Morse potentials to generate the resonance states. Cindro and Cxreiner [10] have used the potential approach with an anharrnonic potential well with a negative quartic term.…”

Section: Introductionmentioning

confidence: 99%

Barrier region resonance model for heavy ion resonances

et al. 1991

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Using an explicit analytical expression of the s-wave S matrix for a typical short-range potential barrier we correlate the classical orbiting and corresponding quantum-mechanical barrier states. These are compared with the results of earlier works on this problem and some additional interesting features, such as dependence of width on height of the barrier and spacing between the levels of the barrier region resonances, are pointed out. On this basis, a four-parameter barrier region resonance model is introduced in the analysis of resonances in heavy ion scattering. The model is then applied to fit satisfactorily the large number of resonances observed in ' C+ ' C and ' C+ ' 0 systems. The present model directly relates the nucleus-nucleus potential barrier generated by the effective nucleus-nucleus potential to heavy ion resonances.

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“…too shallow [17]. These rotation-vibration approaches of [18,19] cannot explain the multitude of states with same`-value in our + 28 Si rotational structure (see fig. 11, right panel, of [5]): translating the classical vibrational amplitude A to a quantum energy gives the semiclassical expression A 2 = 2n + 1 2 h 2 =m h!…”

Section: -Discussion and Outlookmentioning

confidence: 87%

Observation techniques and properties of α-cluster states at high excitation inA = 16-40 nuclei

Lönnroth¹

1997

Nuov Cim A

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Summary. -Groups of narrow states with seemingly rotational-like structures are observed in -particle elastic scattering from the Coulomb barrier up to excitation energies of about 35 MeV. These states are best studied in 28 Si, but similar states are observed in nuclei ranging from 16;18 O to 36;38 Ar. For each`-value some 10-15 states with narrow widths, 20 -80 keV, are observed in 28 Si and apparently in other midsd-shell nuclei, but the properties of these states are not yet fully understood. Existing models, mostly based on rotation-vibration molecular arguments are not able to explain the experimental findings in a consistent way. Non-linear models, interpreting the alpha-particle as a soliton on the nuclear surface, provide a sufficient number of states with the desired properties. Their microscopic interpretation, however, because of the non-linearity, has not yet been made physically clear. In addition to conventional scattering experiments, using -particle beams on solid targets, we have developed a "thick-target" method which makes the data acquisition much faster, and gives continuous energy spectra. We further develop an inverse-geometry method, impinging various heavy ions on helium gas in a target chamber with variable pressure, also providing continuous excitation-energy spectra. This method saves enormously beam time, but has some disadvantages which are being studied.PACS 25.55.Ci -Elastic and inelastic scattering. PACS 29.25 -Particle sources and target. PACS 01.30.Cc -Conference proceedings.

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Bonding potential and the mechanism of quasi-molecular states

Cited by 25 publications

References 20 publications

C12+12C ‘‘6

C12+12C ‘‘6

Barrier region resonance model for heavy ion resonances

Observation techniques and properties of α-cluster states at high excitation inA = 16-40 nuclei

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