Deformation effects on isoscalar giant resonances in 24Mg

被引：28

作者：

Gupta, Y. K. ^{[1
,9
]}

Garg, U. ^{[1
]}

Hoffman, J. ^{[1
,10
]}

Matta, J. ^{[1
,11
]}

Rao, P. V. Madhusudhana ^{[1
,12
]}

Patel, D. ^{[1
,13
]}

Peach, T. ^{[1
]}

Yoshida, K. ^{[2
,3
]}

Itoh, M. ^{[4
,14
]}

Fujiwara, M. ^{[4
]}

Hara, K. ^{[4
]}

Hashimoto, H. ^{[4
]}

Nakanishi, K. ^{[4
]}

Yosoi, M. ^{[4
]}

Sakaguchi, H. ^{[5
]}

Terashima, S. ^{[5
]}

Kishi, S. ^{[5
]}

Murakami, T. ^{[5
]}

Uchida, M. ^{[5
,15
]}

Yasuda, Y. ^{[5
]}

Akimune, H. ^{[6
]}

Kawabata, T. ^{[5
,7
]}

Harakeh, M. N. ^{[8
]}

机构：

[1] Univ Notre Dame, Dept Phys, Notre Dame, IN 46556 USA

[2] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan

[3] Univ Tsukuba, Ctr Computat Sci, Tsukuba, Ibaraki 3058577, Japan

[4] Osaka Univ, Nucl Phys Res Ctr, Osaka 5670047, Japan

[5] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[6] Konan Univ, Dept Phys, Kobe, Hyogo 6588501, Japan

[7] Univ Tokyo, Ctr Nucl Study, Wako, Saitama 3510198, Japan

[8] Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands

[9] Bhabha Atom Res Ctr, Div Nucl Phys, Bombay 400085, Maharashtra, India

[10] Volcano Corp, San Diego, CA 92130 USA

[11] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37380 USA

[12] Andhra Univ, Dept Nucl Phys, Visakhapatnam 530030, Andhra Pradesh, India

[13] Univ Texas MD Anderson Canc Ctr, Houston, TX 77030 USA

[14] Tohoku Univ, Ctr Cyclotron & Radioisotope, Sendai, Miyagi 9808578, Japan

[15] Tokyo Inst Technol, Dept Phys, Tokyo 1528850, Japan

来源：

PHYSICAL REVIEW C | 2016年 / 93卷 / 04期

基金：

美国国家科学基金会;

关键词：

INELASTIC ALPHA-SCATTERING; COUPLED-CHANNELS CALCULATIONS; MONOPOLE RESONANCE; DIPOLE RESONANCE; STRENGTH; CA-40; EXCITATION; STATE; NUCLEI; ENERGY;

D O I：

10.1103/PhysRevC.93.044324

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

Strength distributions for isoscalar giant resonances with multipolarity L <= 2 have been determined in Mg-24 from "instrumental background-free" inelastic scattering of 386-MeV alpha particles at extreme forward angles, including 0 degrees. The isoscalar E0, E1, and E2 strengths are observed to be 57 +/- 7%, 111.1(-7.2)(+10.9)%, and 148.6 +/- 7.3%, respectively, of their energy-weighted sum rules in the excitation energy range of 6 to 35 MeV. The isoscalar giant monopole (ISGMR) and quadrupole (ISGQR) resonances exhibit a prominent K splitting which is consistent with microscopic theory for a prolate-deformed ground state of Mg-24. For the ISGQR it is due to splitting of the three K components, whereas for the ISGMR it is due to its coupling to the K = 0 component of the ISGQR. Deformation effects on the isoscalar giant dipole resonance are less pronounced, however.

引用

页数：7

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