Quasicontinuum gamma decay of Zr-91,Zr-92: Benchmarking indirect (n, gamma) cross section measurements for the s process

Guttormsen M.; Goriely S.; Larsen A. C.; Gorgen A.; Hagen T. W.; Renstrom T.; Siem S.; Syed N. U. H.; Tagliente G.; Toft H. K.; Utsunomiya H.; Voinov A. V.; Wikan K.

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Quasicontinuum gamma decay of Zr-91,Zr-92: Benchmarking indirect (n, gamma) cross section measurements for the s process

机译：ZR-91，ZR-92的Quasicontinuum Gamma衰减：用于S过程的间接间接（N，GAMMA）横截面测量

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Nuclear level densities (NLDs) and gamma-ray strength functions (gamma SFs) have been extracted from particle-gamma coincidences of the 9(2Z)r(p, p'gamma) Zr-92 and Zr-92(p,d gamma)Zr-91 reactions using the Oslo method. The new Zr-91,Zr-92 gamma SF data, combined with photonuclear cross sections, cover the whole energy range from E gamma approximate to 1.5MeV up to the giant dipole resonance at E gamma approximate to 17 MeV. The wide-range. SF data display structures at E gamma approximate to 9.5 MeV, compatible with a superposition of the spin-flipM1 resonance and a pygmy E1 resonance. Furthermore, the. SF shows a minimum at E gamma approximate to 2-3MeV and an increase at lower gamma-ray energies. The experimentally constrained NLDs and gamma SFs are shown to reproduce known (n, gamma) and Maxwellian-averaged cross sections for 91,92Zr using the TALYS reaction code, thus serving as a benchmark for this indirect method of estimating (n, gamma) cross sections for Zr isotopes.

机译：利用奥斯陆方法，从9（2Z）r（p，p’gamma）Zr-92和Zr-92（p，d gamma）Zr-91反应的粒子伽马重合中提取了核能级密度（NLD）和伽马射线强度函数（gamma SFs）。新的Zr-91、Zr-92伽马SF数据，结合光核截面，涵盖了从约1.5MeV的E伽马到约17 MeV的E伽马巨偶极共振的整个能量范围。范围很广。SF数据显示结构的E伽马近似为9.5 MeV，与自旋翻转M1共振和侏儒E1共振的叠加兼容。此外，这一点也很重要。SF在接近2-3MeV的E伽马下显示最小值，在较低的伽马射线能量下显示增加。实验表明，受约束的NLD和伽马SFs可以使用TALYS反应代码再现91,92Zr的已知（n，伽马）和麦克斯韦平均截面，从而作为估算Zr同位素（n，伽马）截面的间接方法的基准。

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《Physical review, C》 |2017年第2期|共10页
作者
Guttormsen M.; Goriely S.; Larsen A. C.; Gorgen A.; Hagen T. W.; Renstrom T.; Siem S.; Syed N. U. H.; Tagliente G.; Toft H. K.; Utsunomiya H.; Voinov A. V.; Wikan K.;
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Univ Oslo Dept Phys N-0316 Oslo Norway;

Univ Libre Bruxelles Inst Astron &

Astrophys Campus Plaine CP-226 B-1050 Brussels Belgium;

Univ Oslo Dept Phys N-0316 Oslo Norway;

Univ Oslo Dept Phys N-0316 Oslo Norway;

Univ Oslo Dept Phys N-0316 Oslo Norway;

Univ Oslo Dept Phys N-0316 Oslo Norway;

Univ Oslo Dept Phys N-0316 Oslo Norway;

Univ Oslo Dept Phys N-0316 Oslo Norway;

Ist Nazl Fis Nucl I-70126 Bari Italy;

Univ Oslo Dept Phys N-0316 Oslo Norway;

Konan Univ Dept Phys Okamoto 8-9-1 Kobe Hyogo 6588501 Japan;

Ohio Univ Dept Phys &

Astron Athens OH 45701 USA;

Univ Oslo Dept Phys N-0316 Oslo Norway;

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正文语种 eng
中图分类原子核物理学、高能物理学;
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5. Quasicontinuum gamma decay of Zr-91,Zr-92: Benchmarking indirect (n, gamma) cross section measurements for the s process [J] . Guttormsen M., Goriely S., Larsen A. C., Physical review, C . 2017,第2期

机译：ZR-91，ZR-92的Quasicontinuum Gamma衰减：用于S过程的间接间接（N，GAMMA）横截面测量
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机译：〜（91,92）Zr的QuasiContinuumγ衰减：S过程的间接（N，γ）横截面测量值
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机译：对s-过程核合成感兴趣的不稳定核的（n，γ）截面的测量

Quasicontinuum gamma decay of Zr-91,Zr-92: Benchmarking indirect (n, gamma) cross section measurements for the s process

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