Search for evidence of rotational cluster bands in O-18

Pirrie S.; Wheldon C.; Kokalova Tz; Bishop J.; Faestermann Th; Hertenberger R.; Wirth H-F; Bailey S.; Curtis N.; DellAquila D.; Mengoni D.; Smith R.; Torresi D.; Turner A.

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Search for evidence of rotational cluster bands in O-18

机译：搜索O-18中的旋转集群带的证据

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Clustering in O-18 is of great interest to the nuclear physics community, due to theoretical predictions of core+alpha and nuclear molecular structures. An experiment was performed in order to measure branching ratios for states in O-18, determining the tendency towards clustering based on the value of Gamma(alpha)/Gamma(tot) tot for each state, and the reduced widths compared to the Wigner limit. An experimental method that enables the measurement of branching ratios for almost all available decay modes, including gamma decay, alpha decay, and n decay, was employed. The method is also sensitive to the population of excited states in daughter nuclei, allowing for more accurate determination of the alpha(0) branch. The measurements represent, for several states, either the first branching ratio measurement or the first determination of Gamma(alpha)/Gamma(tot). Based on these measurements, no evidence of consistent cluster structure is seen across any of the bands previously proposed, casting doubt on their existence. Despite this, some states displaying cluster structure are observed.

机译：由于对核+α和核分子结构的理论预测，O-18中的团簇对核物理界非常感兴趣。为了测量O-18中状态的分支比，进行了一项实验，根据每个状态的伽马（alpha）/伽马（tot）tot值，以及与维格纳极限相比减少的宽度，确定聚集趋势。采用了一种能够测量几乎所有可用衰变模式（包括伽马衰变、阿尔法衰变和n衰变）的分支比的实验方法。该方法对子核中激发态的布居也很敏感，可以更准确地测定α（0）分支。对于几个状态，测量值代表第一次分支比测量或伽马（α）/伽马（tot）的第一次测定。根据这些测量结果，在之前提出的任何能带中都没有发现一致的团簇结构的证据，这使人们对它们的存在产生了怀疑。尽管如此，仍观察到一些呈现团簇结构的状态。

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《Physical review, C》 |2020年第6期|共8页
作者
Pirrie S.; Wheldon C.; Kokalova Tz; Bishop J.; Faestermann Th; Hertenberger R.; Wirth H-F; Bailey S.; Curtis N.; DellAquila D.; Mengoni D.; Smith R.; Torresi D.; Turner A.;
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作者单位

Univ Birmingham Sch Phys &

Astron Birmingham B15 2TT W Midlands England;

Univ Birmingham Sch Phys &

Astron Birmingham B15 2TT W Midlands England;

Univ Birmingham Sch Phys &

Astron Birmingham B15 2TT W Midlands England;

Univ Birmingham Sch Phys &

Astron Birmingham B15 2TT W Midlands England;

Tech Univ Munich Phys Dept D-85748 Garching Germany;

Ludwig Maximilians Univ Munchen Fak Phys D-85748 Garching Germany;

Ludwig Maximilians Univ Munchen Fak Phys D-85748 Garching Germany;

Univ Birmingham Sch Phys &

Astron Birmingham B15 2TT W Midlands England;

Univ Birmingham Sch Phys &

Astron Birmingham B15 2TT W Midlands England;

Univ Napoli Fedor II Dipartimento Fis I-80138 Naples NA Italy;

Univ Padua Dipartimento Fis &

Astron I-35122 Padua PD Italy;

Univ Birmingham Sch Phys &

Astron Birmingham B15 2TT W Midlands England;

Univ Birmingham Sch Phys &

Astron Birmingham B15 2TT W Midlands England;

Univ Birmingham Sch Phys &

Astron Birmingham B15 2TT W Midlands England;

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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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4. Behavior of quantum search algorithm with small phase rotations [J] . Li Xin, Cheng Chuntian, Li Panchi, 高技术通讯（英文版） . 2011,第001期
5. Evidence of vibrational-induced rotational axis switching for (HDCO)-C-12-O-16: New high-resolution analysis of the v(5) and v(6) bands and first analysis of the v(4) band (10-mu m region) [J] . Perrin A., Smirnov M., Lock M., Journal of Molecular Spectroscopy . 2000,第1期

机译：（HDCO）-C-12-O-16振动引起的旋转轴切换的证据：v（5）和v（6）波段的新高分辨率分析以及v（4）波段的首次分析（10 -μm区域）
6. Rotational spectrum of SO_3 and theoretical evidence for the formation of sixfold rotational energy-level clusters in its vibrational ground state [J] . Daniel S. Underwood, Sergei N. Yurchenko, Jonathan Tennyson, The Journal of Chemical Physics . 2014,第24期

机译：SO_3的旋转谱及其在振动基态形成六重旋转能级团簇的理论证据
7. A search for diffuse bands in fullerene planetary nebulae: evidence of diffuse circumstellar bands [J] . J. J. Díaz-Luis, D. A. García-Hernández, N. Kameswara Rao, Astronomy and astrophysics . 2015,第19期

机译：寻找富勒烯行星状星云中的弥散带：弥散的星际带的证据
8. Digital electronics for γ-ray spectroscopy - the path to low cross-sections: First evidence of a rotationnal band in ~(246)Fm [C] . Piot J. French-Japanese Symposium on Nuclear StrucJPture Problems . 2013

机译：用于γ射线光谱的数字电子 - 低横截面的路径：〜（246）FM中的旋转带的第一证据
9. A narrow-band near-IR search for H(alpha)-emitting galaxy clusters at z similar to 1. [D] . Teplitz, Harry Isaac. 1997

机译：在类似于1的z处进行窄带近红外搜索发射Hα的星系团。
10. Analysis of gamma-ray energies for 56 excited superdeformed rotational bands of nuclei of lanthanons La to Dy and of Hg Tl and Pb on the basis of the two-revolving-cluster model with evaluation of moments of inertia and radii of revolution and assignment of nucleonic compositions to the clusters and the central sphere. [O] . L Pauling 1992

机译：基于二重簇模型分析了镧La到Dy以及HgTl和Pb的56个激发核的超形变旋转带的伽马射线能量并评估了惯性矩和旋转半径以及将核子成分分配给团簇和中心球。
11. Analysis of gamma-ray energies for 56 excited superdeformed rotational bands of nuclei of lanthanons La to Dy and of Hg, Tl, and Pb on the basis of the two-revolving-cluster model, with evaluation of moments of inertia and radii of revolution and assignment of nucleonic compositions to the clusters and the central sphere. [O] . Pauling, L 1992

机译：基于两团簇模型，分析了镧系La到Dy以及Hg，Tl和Pb的56个激发的超形变核旋转带的γ射线能量，并评估了惯性矩，旋转半径和将核子成分分配给团簇和中心球。
12. Evidence for exp 116 Xe Quasi-Rotational Bands Populated in the Decays of 0.7 Sec. And 4.1 Sec. Exp 116 Cs States [R] . Marguier, G., Charvet, A., Genevey-Rivier, J., 1979

机译：在0.7秒的衰变中填充exp 116 Xe准旋转带的证据。 4.1秒。 Exp 116 Cs states

Search for evidence of rotational cluster bands in O-18

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