Role of multi-phonon and high-spin states on the quasi-elastic barrier distributions of massive systems
Back-angle quasi-elastic (QE) scattering provides critical barrier information in massive nuclear reactions leading to the synthesis of superheavy nuclei. The shapes and peaks of QE barrier distributions serve as fingerprints of nuclear structures and reaction dynamics. Couplings to collective movem...
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| Language: | English |
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Elsevier
2025-04-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325001431 |
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| author | P.W. Wen O. Chuluunbaatar P. Descouvemont A.A. Gusev C.J. Lin S.I. Vinitsky |
| author_facet | P.W. Wen O. Chuluunbaatar P. Descouvemont A.A. Gusev C.J. Lin S.I. Vinitsky |
| author_sort | P.W. Wen |
| collection | DOAJ |
| description | Back-angle quasi-elastic (QE) scattering provides critical barrier information in massive nuclear reactions leading to the synthesis of superheavy nuclei. The shapes and peaks of QE barrier distributions serve as fingerprints of nuclear structures and reaction dynamics. Couplings to collective movements can lead to distinctive peaks in the barrier distributions, but the role of multi-phonon and high-spin states has not been thoroughly investigated. In this work, we extend the high-accuracy R-matrix method and the finite element method to solve coupled-channel equations for massive systems. These two methods are demonstrated to be more stable than the widely used modified Numerov method and allows us to include more vibrational and rotational couplings. Using the reactions Ti48+Pb208 and V51+248Cm as examples, calculations show that multi-phonon and high-spin states significantly smooth the barrier distributions, improving the agreement with experimental data. The comparison between the coupled-channel results and those obtained from the orientation average formula is examined. This work can advance the study of superheavy element synthesis by providing reliable barrier information and capture cross sections based on constraints from QE reactions. |
| format | Article |
| id | doaj-art-684a00dbb1fa47c49bd8b71d65857a90 |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-684a00dbb1fa47c49bd8b71d65857a902025-08-20T03:42:41ZengElsevierPhysics Letters B0370-26932025-04-0186313938310.1016/j.physletb.2025.139383Role of multi-phonon and high-spin states on the quasi-elastic barrier distributions of massive systemsP.W. Wen0O. Chuluunbaatar1P. Descouvemont2A.A. Gusev3C.J. Lin4S.I. Vinitsky5China Institute of Atomic Energy, 102413 Beijing, ChinaJoint Institute for Nuclear Research, Dubna, 141980 Moscow region, Russia; Institute of Mathematics and Digital Technology, Mongolian Academy of Sciences, 13330 Ulaanbaatar, Mongolia; School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia; Corresponding authors.Département de Physique, CP229, Université Libre de Bruxelles (ULB), B1050 Brussels, Belgium; Corresponding authors.Joint Institute for Nuclear Research, Dubna, 141980 Moscow region, Russia; School of Applied Sciences, Mongolian University of Science and Technology, Ulaanbaatar 14191, Mongolia; Dubna State University, 141980 Dubna, RussiaChina Institute of Atomic Energy, 102413 Beijing, China; College of Physics and Technology & Guangxi Key Laboratory of Nuclear Physics and Technology, Guangxi Normal University, 541004 Guilin, China; Corresponding authors.Joint Institute for Nuclear Research, Dubna, 141980 Moscow region, Russia; Peoples' Friendship University of Russia (RUDN University), 117198, 6 Miklukho-Maklaya St, Moscow, RussiaBack-angle quasi-elastic (QE) scattering provides critical barrier information in massive nuclear reactions leading to the synthesis of superheavy nuclei. The shapes and peaks of QE barrier distributions serve as fingerprints of nuclear structures and reaction dynamics. Couplings to collective movements can lead to distinctive peaks in the barrier distributions, but the role of multi-phonon and high-spin states has not been thoroughly investigated. In this work, we extend the high-accuracy R-matrix method and the finite element method to solve coupled-channel equations for massive systems. These two methods are demonstrated to be more stable than the widely used modified Numerov method and allows us to include more vibrational and rotational couplings. Using the reactions Ti48+Pb208 and V51+248Cm as examples, calculations show that multi-phonon and high-spin states significantly smooth the barrier distributions, improving the agreement with experimental data. The comparison between the coupled-channel results and those obtained from the orientation average formula is examined. This work can advance the study of superheavy element synthesis by providing reliable barrier information and capture cross sections based on constraints from QE reactions.http://www.sciencedirect.com/science/article/pii/S0370269325001431Quasi-elastic reactionBarrier distributionCoupled-channel equationRotational coupling |
| spellingShingle | P.W. Wen O. Chuluunbaatar P. Descouvemont A.A. Gusev C.J. Lin S.I. Vinitsky Role of multi-phonon and high-spin states on the quasi-elastic barrier distributions of massive systems Physics Letters B Quasi-elastic reaction Barrier distribution Coupled-channel equation Rotational coupling |
| title | Role of multi-phonon and high-spin states on the quasi-elastic barrier distributions of massive systems |
| title_full | Role of multi-phonon and high-spin states on the quasi-elastic barrier distributions of massive systems |
| title_fullStr | Role of multi-phonon and high-spin states on the quasi-elastic barrier distributions of massive systems |
| title_full_unstemmed | Role of multi-phonon and high-spin states on the quasi-elastic barrier distributions of massive systems |
| title_short | Role of multi-phonon and high-spin states on the quasi-elastic barrier distributions of massive systems |
| title_sort | role of multi phonon and high spin states on the quasi elastic barrier distributions of massive systems |
| topic | Quasi-elastic reaction Barrier distribution Coupled-channel equation Rotational coupling |
| url | http://www.sciencedirect.com/science/article/pii/S0370269325001431 |
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