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The existence of a secondary bow is confirmed for 13C+12C nuclear rainbow scattering in addition to the 16O+12C system. This is found by studying the experimental angular distribution of 13C+12C scattering at the incident 13C energy…

Nuclear Theory · Physics 2015-11-26 S. Ohkubo , Y. Hirabayashi , A. A. Ogloblin

The existence of a supernumerary nuclear rainbow in inelastic scattering is reported. This is done by studying inelastic $^{16}$O scattering from $^{12}$C, exciting the $2^+$ (4.44 MeV) state of $^{12}$C and elastic scattering at the…

Nuclear Theory · Physics 2017-08-16 S. Ohkubo , Y. Hirabayashi , A. A. Ogloblin

Inelastic $^{16}$O +$^{12}$C rainbow scattering to the $2^+$ (4.44 MeV) state of $^{12}$C was measured at the incident energies, $E_L$ = 170, 181, 200, 260 and 281 MeV. A systematic analysis of the experimental angular distributions was…

Nuclear Theory · Physics 2014-12-24 S. Ohkubo , Y. Hirabayashi , A. A. Ogloblin , Yu. A. Gloukhov , A. S. Dem'yanova , W. H. Trzaska

We report, {for the first time, the emergence of} a secondary bow with ripples in $^{12}$C+$^{12}$C nuclear rainbow scattering. This finding was achieved by studying the experimental angular distributions in $^{12}$C+$^{12}$C scattering at…

Nuclear Theory · Physics 2025-09-19 S. Ohkubo , Y. Hirabayashi

Rainbows are generally considered to be caused by static refraction and reflection. A primary and a secondary rainbow appear due to refraction and internal reflection in a raindrop as explained by Newton. The quantum nuclear rainbow, which…

Nuclear Theory · Physics 2014-05-15 S. Ohkubo , Y. Hirabayashi

The data of inelastic 16O+16O scattering to the lowest 2+ and 3- excited states of 16O have been measured at Elab = 250, 350, 480, 704 and 1120 MeV and analyzed consistently in the distorted wave Born approximation (DWBA), using the semi-…

The Airy structure of the nuclear rainbow and prerainbow in inelastic and elastic $\alpha+^{16}$O scattering is studied with the coupled channel method using a folding potential derived from the microscopic wave functions of $^{16}$O. The…

Nuclear Theory · Physics 2013-07-19 Y. Hirabayashi , S. Ohkubo

A study of the interaction of loosely bound nuclei 6,7Li at 9 and 19 AMeV with light targets has been undertaken. With the determination of unambiguous optical potentials in mind, elastic data for four projectile-target combinations and one…

Nuclear Experiment · Physics 2009-11-10 F. Carstoiu , L. Trache , R. E. Tribble , C. A. Gagliardi

We perform a systematic study of inelastic nuclear rainbow scattering for the \oc system to the 2$^+$ (4.44 MeV) state of $^{12}$C at incident energies of 100--608 MeV with the coupled-channels method. The recently generalized…

Nuclear Theory · Physics 2024-10-18 Nguyen Hoang Phuc , Nguyen Tri Toan Phuc , Do Cong Cuong

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…

Nuclear Theory · Physics 2015-09-03 S. Ohkubo , Y. Hirabayashi

Background: An anomaly in the elastic scattering of O-16 on C-12 around 300 MeV was resolved by including collective excitations of both nuclei, leading to a secondary rainbow. There is little systematic knowledge of the contribution of…

Nuclear Theory · Physics 2015-02-25 R. S. Mackintosh , Y. Hirabayashi , S. Ohkubo

Elastic $^{16}$O+$^{12}$C scattering is known to exhibit the nuclear rainbow pattern at incident energies $E_\text{lab}\gtrsim 200$ MeV, with the Airy structure of the far-side scattering cross section clearly seen at medium and large…

Nuclear Theory · Physics 2020-12-10 Nguyen Hoang Phuc , Dao T. Khoa , Nguyen Tri Toan Phuc

The experimental data on the $^{16}$O$+^{12}$C and $^{18}$O$+^{12}$C elastic scatterings and their optical model analysis are presented. Detailed and complete elastic angular distributions have been measured at the Strasbourg Vivitron…

Nuclear Experiment · Physics 2009-11-07 S. Szilner , M. P. Nicoli , Z. Basrak , R. M. Freeman , F. Haas , A. Morsad , M. E. Brandan , G. R. Satchler

The calculation of the differential cross section of the inelastic p9Be scattering (to the levels J = 1/2, 3/2) was made in the framework of the Glauber diffraction theory. We used the wave function of 9Be in the ground and excited states…

Nuclear Theory · Physics 2015-06-18 E. Ibraeva , M. Zhusupov , A. Dzhazairov-Kakhramanov , P. Krassovitskiy

$\alpha$+$\alpha$ scattering has a long history since the first experiment by Rutherford and Chadwick in 1927 and has been studied thoroughly experimentally and theoretically. However, $\alpha$+$\alpha$ scattering has never been paid…

Nuclear Theory · Physics 2024-04-02 S. Ohkubo

$^3$He+$^{12}$C scattering is studied in a coupled channel method by using a double folding model with microscopic wave functions of $^{12}$C. Experimental angular distributions in elastic and inelastic scattering to the $2^+$ (4.44 MeV),…

Nuclear Theory · Physics 2011-02-14 S. Ohkubo , Y. Hirabayashi

The nuclear rainbow observed in the elastic $\alpha$-nucleus and light heavy-ion scattering is proven to be due to the refraction of the scattering wave by a deep, attractive real optical potential. The nuclear rainbow pattern, established…

Nuclear Theory · Physics 2021-02-16 Nguyen Hoang Phuc , Dao T. Khoa , Nguyen Tri Toan Phuc , Do Cong Cuong

Elastic scattering of alpha-particle and some tightly-bound light nuclei has shown the pattern of rainbow scattering at medium energies, which is due to the refraction of the incident wave by a strongly attractive nucleus-nucleus potential.…

Nuclear Theory · Physics 2008-11-26 Dao T. Khoa , W. von Oertzen , H. G. Bohlen , S. Ohkubo

This chapter represents an attempt to summarize some of the direct and indirect connections that exist between ray theory, wave theory and potential scattering theory. Such connections have been noted in the past, and have been exploited to…

Optics · Physics 2014-05-15 John A. Adam

The scattering of $^9$Be on $^{208}$Pb is addressed within a four-body Continuum-Discretized Coupled-Channels (CDCC) framework, considering a three-body $\alpha + \alpha + n$ projectile plus a structureless target. The projectile states are…

Nuclear Theory · Physics 2017-04-06 J. Casal , M. Rodríguez-Gallardo , J. M. Arias
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