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首页> 外文期刊>Physical review, C >Searching for states analogous to the C-12 Hoyle state in heavier nuclei using the thick target inverse kinematics technique
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Searching for states analogous to the C-12 Hoyle state in heavier nuclei using the thick target inverse kinematics technique

机译：使用厚的目标逆运动学技术在较重的核中搜索类似于C-12 Hoyle状态的状态

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摘要

Identification of alpha-cluster states analogous to the C-12 Hoyle state in heavier alpha-conjugate nuclei can provide test of the existence of alpha condensates in nuclei. Such states are predicted for O-160, Ne-20, Mg-24, Si-28, etc., at excitation energies slightly above the multi- alpha-particle decay threshold but have not yet been experimentally identified. The thick target inverse kinematics (TTIK) technique can be used to study the breakup of excited self-conjugate nuclei into many a particles. The reaction Ne-20 + alpha was studied using a Ne-20 beam at 12 MeV/nucleon from the K150 cyclotron at Texas A&M University. The TTIK method was used to study both single alpha-particle emission and multiple alpha-particle decays. Events with a multiplicity up to four were analyzed. The analysis of the three alpha-particle emission data allowed the identification of the Hoyle state and other C-12 excited states decaying into three alpha particles. The results are shown and compared with other data available in the literature. Although the statistics for events with alpha-multiplicity four is low, the data show a structure at about 15.2 MeV that could indicate the existence in O-16 of a state analogous to the C-12 Hoyle state. Moreover, the reconstructed excitation energy of Mg-24 for these events peaks at around 34 MeV, very close to the predicted excitation energy for an excited state analogous to the C-12 Hoyle state in Mg-24. The structure is further confirmed by the reanalysis of alpha-multiplicity-four events from a previous experiment performed at 9.7 MeV/nucleon with a similar, but lower granularity, experimental setup.
机译：鉴定与较重的α-缀合物核中的C-12霍健态类似的α-簇状态可以提供核中α凝聚物的存在的测试。在略微高于多α-粒子衰减阈值的激发能量下，预测由O-160，NE-20，MG-24，Si-28等预测这些状态，但尚未经过实验识别。厚的目标逆运动学（TTIK）技术可用于研究激发的自缀合核的分解成许多颗粒。在德克萨斯A＆M大学的K150回旋加速器中，使用12meV / Nechoron的Ne-20光束研究了反应Ne-20 +α。使用TTIK方法研究单一α-颗粒发射和多个α-颗粒腐烂。分析了多达四个的事件。对三个α-粒子发射数据的分析允许识别霍健状态和其他C-12激发态衰减成三种α颗粒。结果显示并与文献中可用的其他数据进行了比较。虽然具有α-多个四个的事件的统计数据很低，但数据显示了大约15.2 mev的结构，其可以指示类似于C-12霍伊尔状态的状态的O-16的存在。此外，对于这些事件的重建激发能量，用于这些事件的峰值约为34meV，非常接近于在MG-24中类似于C-12 Hoyle状态的激发状态的预测激发能量。通过在9.7meV /核子的先前实验中，通过在9.7meV /核中进行类似但更低的粒度，实验设置，进一步证实了该结构。

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  • 来源
    《Physical review, C》 |2018年第4期|共10页
  • 作者

    Barbui M.; Hagel K.; Gauthier J.; Wuenschel S.; Wada R.; Goldberg V. Z.; deSouza R. T.; Hudan S.; Fang D.; Cao X-G; Natowitz J. B.;

  • 作者单位

    Texas A&

    M Univ Cyclotron Inst MS3366 College Stn TX 77843 USA;

    Texas A&

    M Univ Cyclotron Inst MS3366 College Stn TX 77843 USA;

    Texas A&

    M Univ Cyclotron Inst MS3366 College Stn TX 77843 USA;

    Texas A&

    M Univ Cyclotron Inst MS3366 College Stn TX 77843 USA;

    Texas A&

    M Univ Cyclotron Inst MS3366 College Stn TX 77843 USA;

    Texas A&

    M Univ Cyclotron Inst MS3366 College Stn TX 77843 USA;

    Indiana Univ Bloomington IN 47405 USA;

    Indiana Univ Bloomington IN 47405 USA;

    Chinese Acad Sci Shanghai Inst Appl Phys SINAP Shanghai Peoples R China;

    Texas A&

    M Univ Cyclotron Inst MS3366 College Stn TX 77843 USA;

    Texas A&

    M Univ Cyclotron Inst MS3366 College Stn TX 77843 USA;

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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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