2+ excitation of the 12C Hoyle state

被引：136

作者：

Freer, M. ^{[1
]}

Fujita, H. ^{[2
]}

Buthelezi, Z. ^{[3
]}

Carter, J. ^{[2
]}

Fearick, R. W. ^{[4
]}

Foertsch, S. V. ^{[3
]}

Neveling, R. ^{[3
]}

Perez, S. M. ^{[3
]}

Papka, P. ^{[5
]}

Smit, F. D. ^{[3
]}

Swartz, J. A. ^{[5
]}

Usman, I. ^{[2
]}

机构：

[1] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England

[2] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa

[3] iThemba LABS, ZA-7129 Somerset W, South Africa

[4] Univ Cape Town, Dept Phys, ZA-7700 Rondebosch, South Africa

[5] Univ Stellenbosch, Dept Phys, ZA-7602 Stellenbosch, South Africa

来源：

PHYSICAL REVIEW C | 2009年 / 80卷 / 04期

关键词：

ALPHA; SCATTERING; O-16;

D O I：

10.1103/PhysRevC.80.041303

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：

A high-energy-resolution magnetic spectrometer has been used to measure the C-12 excitation energy spectrum to search for the 2(+) excitation of the 7.65 MeV, 0(+) Hoyle state. By measuring in the diffractive minimum of the angular distribution for the broad 0(+) background, evidence is found for a possible 2(+) state at 9.6(1) MeV with a width of 600(100) keV. The implications for the Be-8 + He-4 reaction rate in stellar environments are discussed.

引用

页数：5

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