基于热核退激的路径分析 对核耗散的研究

1. 基于热核退激的路径分析 对核耗散的研究 毛英臣 辽宁师范大学物理学院 2012超重核合成与性质讨论会, 兰州大学, 2012年8月

2. Outlines YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 1 Introduction Theoretical Models Results and Discussions Summary

3. Introduction – Heavy-ion Nuclear Reaction YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 2

4. Nuclear Dissipation YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 3 D. Hilscher, I.I. Gontchar and H. Rossner, Phys. Atom. Nucl. 57, 1353 (1994)

5. Theoretical results I One-Body Dissipation Theory + Wall and Window Formulism J. Blocki et al. YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 4 J. Blocki, et al., Ann. Phys.113, 330 (1978); H. Feldmeier, Rep. Prog. Phys.50, 915 (1987) J. R. Nix and A. J. Sierk, Proc. Of the 6th Adriatic Conference in Nuclure Physics: Frontiers of Heavy-Ion Physics, Dubrovnik, Yugoslavia (1987), edited by N. Cindro et al. (Singapore, World Scientific, 1990), p. 333. S. Palet al. Phys. Rev.C 63, 064603 (2001); ibids 63, 064603 (2001). G. Abal, et al., Nucl. Phys. A 683, 279 (2001).

6. Theoretical results II Quantal Transport Theory by H. Hofmann et al. Dissipative Diabatic Dynamicsby W. Nörenberg YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 5 H. Hofmann and P. J. Siemens, Nucl. Phys.A 257, 165 (1976); H. Hofmann, Phys. Rep.284, 137 (1997) ; H. Hofmann, The physics of warm nuclei: with analogies to mesoscopic systems, Oxford, OUP, 2008 W. Nörenberg, Nucl. Phys. A 409, 191c (1983).

7. TheoreticalModels The Combined Dynamical Statistical Model (CDSM model) YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 6 P. Fröbrich and I. I. Gontchar, Phys. Rep.292, 131 (1998). In overdamped condition，Langevin equation reads： P. Fröbrich, Nucl. Phys. A 787, 107c (2007)

8. Important parameters I Entropy: Temperature: Level density parameter (LDP): YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 7

9. Important parameters II YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 8 OBD nuclear dissipation parameter： N. Carjan I.I. Gontchar, L.A. Litnevsky, Z. Phys. A 359, 149 (1997) SPS nuclear dissipation parameter： P. Fröbrich, I.I. Gontchar, N.D. Litnevsky, N. Phys. A 556, 281 (1993)

10. Important parameters III YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 9 Coordinate Relationship of Nuclear Dissipation

11. Motive YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 10

12. MCDSM (Driving Potential) I YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 11 W. J. Swiatecki, Nucl. Phys. A 574, 233 (1994)

13. MCDSM (Driving Potential) II The Modified Combined Dynamical Statistical Model (MCDSM model) YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 12 • Potential V (q) R.W. Hasse, Ann. Phys. 68, 377 (1971) Y.C. Mao, and B.P. Gu, J. Phys.G 32, 2109 (06)

14. MCDSM (LDP) • LDP a (q) YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 13

15. Results and Disscusions YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 14 Y.C. Mao, and B.P. Gu, J. Phys.G 32, 2109 (06)

16. Pathwise Analysis Method I YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 15

17. Pathwise Analysis Method II 191,194,197,200,203Au YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 16

18. Pathwise Analysis Method III YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 17

19. Pathwise Analysis Method IV YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 18

20. Pathwise Analysis Method V YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 19

21. Summary The emission of prescission paritcle decends with increasing coordinate relationship of LDP. In order to ascertain the deformation and temperature relationship of nuclear dissipation, it is necessary to take other parameters into account in the synchronizing and self-consistent way. The emission of prescission paritcle is controled by the competition between the driving force (from the free energy) and the nuclear damping force (nuclear dissipation) in local deformation section. YCMAO, 2012SHN, Lanzhou, 2012-08-11 — page 20

22. Thank You!