Electromagnetic Transition from the 4+ to 2+ Resonance in 8Be Measured via the Radiative Capture in 4He+4He

被引：44

作者：

Datar, V. M. ^{[1
,2
]}

Chakrabarty, D. R. ^{[1
]}

Kumar, Suresh ^{[1
,2
]}

Nanal, V. ^{[3
]}

Pastore, S. ^{[4
]}

Wiringa, R. B. ^{[5
]}

Behera, S. P. ^{[1
]}

Chatterjee, A. ^{[1
]}

Jenkins, D. ^{[6
]}

Lister, C. J. ^{[5
]}

Mirgule, E. T. ^{[1
]}

Mitra, A. ^{[1
]}

Pillay, R. G. ^{[3
]}

Ramachandran, K. ^{[1
]}

Roberts, O. J. ^{[6
]}

Rout, P. C. ^{[1
,2
]}

Shrivastava, A. ^{[1
]}

Sugathan, P. ^{[7
]}

机构：

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

[2] Homi Bhabha Natl Inst, Bombay 400094, Maharashtra, India

[3] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[4] Univ S Carolina, Dept Phys & Astron, Columbia, SC 29208 USA

[5] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA

[6] Univ York, Dept Phys, York Y010 5DD, N Yorkshire, England

[7] Inter Univ Accelerator Ctr, New Delhi 110064, India

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 06期

基金：

美国国家科学基金会;

关键词：

Helium;

D O I：

10.1103/PhysRevLett.111.062502

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

An earlier measurement on the 4(+) to 2(+) radiative transition in Be-8 provided the first electromagnetic signature of its dumbbell-like shape. However, the large uncertainty in the measured cross section does not allow a stringent test of nuclear structure models. This Letter reports a more elaborate and precise measurement for this transition, via the radiative capture in the He-4 + He-4 reaction, improving the accuracy by about a factor of 3. Ab initio calculations of the radiative transition strength with improved three-nucleon forces are also presented. The experimental results are compared with the predictions of the alpha cluster model and ab initio calculations.

引用

页数：5

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