Near-Threshold Dipole Strength in 10Be with Isoscalar Character

被引：0

作者：

Chen, J. ^{[1
,2
]}

Ayyad, Y. ^{[3
]}

Bazin, D. ^{[4
]}

Mittig, W. ^{[4
]}

Serikow, M. Z. ^{[4
]}

Keeley, N. ^{[5
]}

Wang, S. M. ^{[6
,7
,8
]}

Zhou, B. ^{[6
,7
,8
]}

Zamora, J. C. ^{[4
]}

Beceiro-Novo, S. ^{[9
]}

Cortesi, M. ^{[4
]}

Denudt, M. ^{[4
]}

Heinitz, S. ^{[10
]}

Giraud, S. ^{[4
]}

Gueye, P. ^{[4
]}

Hoffman, C. R. ^{[2
]}

Kay, B. P. ^{[2
]}

Maugeri, E. A. ^{[10
]}

Monteagudo, B. G. ^{[4
,11
]}

Li, H. ^{[12
]}

Liu, W. P. ^{[1
,13
]}

Munoz, A. ^{[3
]}

Ndayisabye, F. ^{[4
]}

Pereira, J. ^{[4
]}

Rijal, N. ^{[4
]}

Santamaria, C. ^{[4
]}

Schumann, D. ^{[10
]}

Watwood, N. ^{[4
]}

Votta, G. ^{[4
]}

Yin, P. ^{[14
]}

Yuan, C. X. ^{[15
]}

Zhang, Y. N. ^{[15
]}

机构：

[1] Southern Univ Sci & Technol, Coll Sci, Shenzhen 518055, Guangdong, Peoples R China

[2] Argonne Natl Lab, Phys Div, Lemont, IL 60439 USA

[3] Univ Santiago de Compostela, IGFAE, E-15782 Santiago De Compostela, Spain

[4] Michigan State Univ, FRIB NSCL Lab, E Lansing, MI 48824 USA

[5] Natl Ctr Nucl Res, Ul Andrzeja Soltana, Otwock, Poland

[6] Fudan Univ, Inst Modern Phys, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai 200433, Peoples R China

[7] NSFC, Dept Fis Aplicada, Campus Univ, E-36310 Shanghai, Spain

[8] Fudan Univ, Shanghai 200438, Peoples R China

[9] Univ A Coruna, Grp Polimeros, CITENI, Campus Ind, Ferrol 15471, Spain

[10] Paul Scherrer Inst, Lab Radiochem, Villigen, Switzerland

[11] Hope Coll, Dept Phys, Holland, MI 49422 USA

[12] Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China

[13] China Inst Atom Energy, POB 27547, Beijing 102413, Peoples R China

[14] Henan Univ Sci & Technol, Coll Phys & Engn, Luoyang 471023, Peoples R China

[15] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai 519082, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2025年 / 134卷 / 01期

基金：

中国国家自然科学基金; 美国国家科学基金会;

关键词：

NUCLEAR; CLUSTERS; MODEL;

D O I：

10.1103/PhysRevLett.134.012502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Isoscalar dipole transitions are a distinctive fingerprint of cluster structures. A 1- resonance at 7.27 (10) MeV, located just below the alpha-emission threshold, has been observed in the deuteron inelastic scattering reactions off 10Be. The deformation lengths of the excited states in 10Be below 9 MeV have been inferred from the differential cross sections using coupled channel calculations. This observed 1- resonance has isoscalar characteristics and exhausts approximately 5%-15% of the isoscalar dipole energy- weighted sum rule, providing evidence for pronounced alpha cluster structure in 10Be. The Gamow coupled channel approach supports this interpretation and suggests the near-threshold effect might be playing an important role in this excitation energy domain. The alpha + alpha + n + n four-body calculation reproduces the observed enhanced dipole strength, implying that the four-body cluster structure is essential to describe the 1- states in 10Be.

引用

页数：7

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