Fine structure in the energy region of the isoscalar giant quadrupole resonance:: Characteristic scales from a wavelet analysis -: art. no. 122501

被引：66
|
作者：
Shevchenko, A [1 ]
Carter, J
Fearick, RW
Förtsch, SV
Fujita, H
Fujita, Y
Kalmykov, Y
Lacroix, D
Lawrie, JJ
von Neumann-Cosel, P
Neveling, R
Ponomarev, VY
Richter, A
Sideras-Haddad, E
Smit, FD
Wambach, J
机构：
[1] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany
[2] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa
[3] Univ Cape Town, Dept Phys, ZA-7700 Rondebosch, South Africa
[4] iThemba LABS, ZA-7129 Somerset W, South Africa
[5] Osaka Univ, Dept Phys, Osaka 5600043, Japan
[6] ISMRA Univ Caen, LPC, F-14050 Caen, France
[7] Joint Inst Nucl Res Dubna, Bogoliubov Lab Theoret Phys, Dubna, Russia
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 12期
关键词：
D O I：
10.1103/PhysRevLett.93.122501
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Fine structure in the energy region of the isoscalar giant quadrupole resonance in nuclei is observed in high-resolution proton scattering experiments at iThemba LABS over a wide mass range. A novel method based on wavelet transforms is introduced for the extraction of scales characterizing the fine structure. A comparison with microscopic model calculations including two-particle two-hole (2p2h) degrees of freedom identifies the coupling to surface vibrations as the main source of the observed scales. A generic pattern is also found for the stochastic coupling to the background of the more complex states.
引用
收藏
页码：122501 / 1
页数：4
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