Nuclear rainbow in the elastic scattering of 16O nuclei on carbon isotopes

Glukhov, Yu.A.; Rudakov, V.P.; Artemov, K.P.; Demyanova, A. S.; Ogloblin, A. A.; Goncharov, S. A.; Izadpanakh, A.

doi:10.1134/s1063778807010012

Cited by 9 publications

(5 citation statements)

References 11 publications

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“…This is different from the previous assignment in Ref. [14]. The evolution of the Airy structure into the molecular resonances and the cluster structure in the low energy region is discussed in comparison with typical system such as 16 O+ 16 O.…”

Section: Introductioncontrasting

confidence: 84%

“…We note that the wrong A3 assignment to the Airy minimum at 76 • at 132 MeV in Ref. [14], which should be A2 due to the Luneberg lens [25] of the mean field potential, was done simply based on the similarity of the shape of the angular distributions and the Airy minimum between 16 O+ 14 C and 16 O+ 12 C scatterings at the same energy.…”

Section: Airy Structure In Elastic 16 O+ 14 C Scatteringmentioning

confidence: 96%

“…The 16 O+ 14 C system is situated between 16 O+ 16 O and 16 O+ 12 C. Ogloblin et al [12] measured rainbow scattering for the 16 O+ 14 C system at 132, 281 and 382.2 MeV. Glukhov et al [14] investigated the Airy structure and concluded that the order of the Airy minimum at θ=76 • in the angular distribution at E L =132 MeV is A3, which is similar to the Airy minimum A3 at θ=82 • in the angular distribution of 16 O+ 12 C at E L =132 MeV claimed with a deeper family potential in Ref. [12].…”

Section: Introductionmentioning

confidence: 99%

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Airy structure in $^{16}$O+$^{14}$C nuclear rainbow scattering

Ohkubo,

Hirabayashi

2015

Preprint

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The Airy structure in 16 O+ 14 C rainbow scattering is studied with an extended double folding (EDF) model that describes all the diagonal and off-diagonal coupling potentials derived from the microscopic realistic wave functions for 16 O using a density-dependent nucleon-nucleon force. The experimental angular distributions at EL=132, 281 and 382.2 MeV are well reproduced by the calculations. By studying the energy evolution of the Airy structure, the Airy minimum at around θ=76 • in the angular distribution at EL=132 MeV is assigned as the second order Airy minimum A2 in contrast to the recent literature which assigns it as the third order A3. The Airy minima in the 90 • excitation function is investigated in comparison with well-known 16 O+ 16 O and 12 C+ 12 C systems. Evolution of the Airy structure into the molecular resonances with the 16 O+ 14 C cluster structure in the low energy region around Ec.m.=30 MeV is discussed. It is predicted theoretically for the first time for a non-4N 16 O+ 14 C system that Airy elephants in the 90 • excitation function are present.

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Section: Introductioncontrasting

confidence: 84%

Section: Airy Structure In Elastic 16 O+ 14 C Scatteringmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

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Airy structure in $^{16}$O+$^{14}$C nuclear rainbow scattering

Ohkubo,

Hirabayashi

2015

Preprint

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“…The procedure for identifying Airy minima in transfer reaction angular distributions is similar to that used in the case of elastic scattering (e.g., Refs. [3,7,8]).…”

Section: Introductionmentioning

confidence: 99%

RMF-based Microscopic Study of Ground-state Properties and Nuclear Shape Transitions in Even–Even Po Isotopes

Thakur¹,

Kuamar²,

Kumar³

et al. 2022

Acta Phys. Pol. B

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We analyze the angular distributions for the (α, 3 He) and (α, t) reactions on 28 Si for projectile energies ranging from 50 to 120 MeV based on the partial-wave representation of the transfer amplitude expressed in terms of the S-matrices for the entrance and exit channels, with an emphasis on identifying Airy minima of various orders. The calculations have been performed using a six-parameter S-matrix model and S-matrix parameters obtained from the analysis of elastic scattering data. The first-and (or) second-order Airy minima are clearly identified in the analyzed transfer reaction angular distributions at intermediate angles. The detected Airy minima are found to be due to the interference between several inner and surface partial waves. The impact parameters of these waves are in the range of 1-6 fm, the upper boundary of which is less than the strong absorption radius.

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“…A nuclear rainbow in the femto meter world discovered by Goldberg et al [7] is a Newton's zero-order rainbow [8], which was expected by Newton [2] but not realized in meteorological rainbow. The nuclear rainbows have been extensively studied [9] and found to be very important in the studies of nuclear interactions [9][10][11][12][13][14][15][16][17][18][19][20] and nuclear cluster structures [21][22][23][24][25]. The nuclear rainbows, which carry information about the deep inside of the nucleus, can uniquely determine the interaction potential, that is, the global potential which works over a wide range of energies from negative energy to the high energy region.…”

mentioning

confidence: 99%

Further evidence for a dynamically generated secondary bow inC13+C12rainbow scattering

2015

Self Cite

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The existence of a secondary bow is confirmed for 13 C+ 12 C nuclear rainbow scattering in addition to the 16 O+ 12 C system. This is found by studying the experimental angular distribution of 13 C+ 12 C scattering at the incident 13 C energy EL=250 MeV with an extended double folding (EDF) model that describes all the diagonal and off-diagonal coupling potentials derived from the microscopic wave functions for 12 C using a density-dependent nucleon-nucleon force. The Airy minimum at θ ≈70 • , which is not reproduced by a conventional folding potential, is revealed to be a secondary bow generated dynamically by a coupling to the excited state 2 + (4.44 MeV) of 12 C. The essential importance of the quadruple Y2 term (reorientation term) of potential of the excited state 2 + of 12 C for the emergence of a secondary bow is found. The mechanism of the secondary bow is intuitively explained by showing how the trajectories are refracted dynamically into the classically forbidden angular region beyond the rainbow angle of the primary rainbow.PACS numbers: 25.70. Bc,24.10.Eq,24.10.Ht Rainbows have been attracting mankind including poets and scientists [1-6] at least two thousand years. A nuclear rainbow in the femto meter world discovered by Goldberg et al [7] is a Newton's zero-order rainbow [8], which was expected by Newton [2] but not realized in meteorological rainbow. The nuclear rainbows have been extensively studied [9] and found to be very important in the studies of nuclear interactions [9-20] and nuclear cluster structures [21][22][23][24][25]. The nuclear rainbows, which carry information about the deep inside of the nucleus, can uniquely determine the interaction potential, that is, the global potential which works over a wide range of energies from negative energy to the high energy region. The existence of a secondary bow is not expected in principle in a nuclear rainbow caused by refraction only. In fact, in the semiclassical theory of nuclear scattering [26][27][28][29] in a mean field nuclear potential, only one extremum, (i.e., only one rainbow) is allowed in the deflection function.Very recently the existence of a secondary bow has been reported [15] in the 16 O+ 12 C rainbow scattering at around E L =300 MeV. Its existence has not been noticed in the conventional optical model studies using a folding potential or a phenomelogical potential. The secondary bow is generated dynamically by a quantum coupling effect. Via quantum coupling to an excited state of 12 C, a secondary bow emerges in the classically forbidden darkside of the ordinary (primary) rainbow caused by a mean field nuclear potential of a Luneburg lens [8]. The dynamical coupling has been shown to cause an additional attraction, which plays a role of a second lens, in the intermediate and inner region of the mean field Luneburg lens potential [18]. It is intriguing and important to explore whether a secondary rainbow, which is logically not limited to the 16 O+ 12 C system, is confirmed in other systems.From this viewpoint, when we look...

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Nuclear rainbow in the elastic scattering of 16O nuclei on carbon isotopes

Cited by 9 publications

References 11 publications

Airy structure in $^{16}$O+$^{14}$C nuclear rainbow scattering

Airy structure in $^{16}$O+$^{14}$C nuclear rainbow scattering

RMF-based Microscopic Study of Ground-state Properties and Nuclear Shape Transitions in Even–Even Po Isotopes

Further evidence for a dynamically generated secondary bow inC13+C12rainbow scattering

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