Semiclassical description of multipair transfer processes in heavy ion collisions with superfluid systems |
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| Affiliation: | 1. Sektion Physik der Universität München, Am Coulombwall 1, D-8046 Garching, BRD;2. The Niels Bohr Institute, University of Copenhagen, Blegdamsvej 17, DK-2100 Copenhagen, Denmark;1. Department of Theoretical Physics and Department of Nuclear Physics, Research School of Physics and Engineering, The Australian National University, Canberra ACT 2601, Australia;2. Department of Physics and Astronomy, Vanderbilt University, Nashville, TN 37235, USA;1. Institute of Fundamental and Applied Sciences, Duy Tan University, Ho Chi Minh City, 700000, Viet Nam;2. Faculty of Natural Sciences, Duy Tan University, Da Nang City, 550000, Viet Nam;3. Faculty of Fundamental Sciences, PHENIKAA University, Hanoi, 12116, Viet Nam;1. GSI Helmholtz Centre for Heavy Ion Research, Planckstrasse 1, 64291 Darmstadt, Germany;2. Justus-Liebig-Universität Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany;3. Johannes Gutenberg-Universität Mainz, J.J. Becherweg 40, 55099 Mainz, Germany;4. The Helmholtz Institute Mainz (HIM), J.J. Becherweg 40, 55099 Mainz, Germany;5. Iwate University, Morioka, Iwate 020-8550, Japan;6. Nigde University, 51100 Nigde, Turkey;7. Seoul National University, Gwanakro Sillim-dong, Gwanak-gu, Seoul 151-747, Republic of Korea;8. KVI, University of Groningen, Zernikelaan 25, NL-9747 AA Groningen, The Netherlands;9. The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan;10. Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan;11. Research Centre for Nuclear Physics (RCNP), 10-1 Mihogaoka, Ibaraki, Osaka 567-0047, Japan;12. Technische Universität Darmstadt, 64289 Darmstadt, Germany;13. SUBATECH, La Chantrerie, 4 rue Alfred Kastler, BP 20722, 44307 Nantes, France;14. Osaka Electro-Communication University, Hatsu-cho 18-8, Neyagawa, Osaka 572-8530, Japan;15. KEK, 1-1 Oho, Tsukuba, Ibaraki 305-0801, Japan;p. Tohoku University, 6-3 Aoba Aramaki Aoba Sendai, Miyagi 980-7875, Japan |
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| Abstract: | Pair transfer processes involving a superfluid system are studied in terms of phase space distributions constructed in a product representation which blends both ordinary- and gauge-space degrees of freedom. The time evolution of these distributions is followed by solving a collection of classical equations of motion, the quantal fluctuations being accounted for by the sampling of all possible initial orientations of the (undetermined) intrinsic system in gauge space. The excitation of the pairing rotational degree of freedom — corresponding to a variation in the number of particles — is induced by a gauge-deformed ion-ion potential, as befits the superfluid character of the target. Different orientations leading to the same final mass transfer may produce (in the case of large pairing deformation) interference effects in the final population of the members of the pairing rotational band. We also discuss how this approach can be used to describe the effect of pair transfer modes on sub-barrier fusion processes. |
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