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首页> 外文期刊>Physical review, C >New and comprehensive beta- and beta p-decay spectroscopy results in the vicinity of Sn-100
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New and comprehensive beta- and beta p-decay spectroscopy results in the vicinity of Sn-100

机译：新的和全面的β-和β腐烂光谱结果导致SN-100附近

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摘要

A decay spectroscopy experiment on proton-rich nuclei in the vicinity of the doubly magic Sn-100 was carried out at RIKEN Nishina Center. More than 20 nuclei with 43 <= Z <= 50 and N <= 51, produced by fragmentation reactions were investigated via analyses of beta-decay, beta p-decay, and subsequent gamma-ray data. Owing to higher statistics, the precision on the half-lives of many of the ground states and isomers was improved. beta-decay endpoint energies of 11 states in 8 nuclei were measured for the first time, and the corresponding Q(EC) and excitation energies were generally consistent with various mass models. Many beta-delayed proton emission branching ratios were measured either for the first time or with higher precision compared to literature values, and some of them differed by more than 2 sigma. Many of the large discrepancies were associated with nuclei with long-lived isomeric states, highlighting large systematic uncertainties involved in these measurements. Twenty-five new gamma rays were observed, and ten new states are proposed with unambiguous excitation energies, spins, and parities. Most of the energies of the excited states were consistent within 300 keV or 20%, whichever was greater, compared to shell model predictions in the proton/neutron (P-1/2, g(9/2)) model space assuming a Sr-76 core. A signature of a new (1/2(-)) isomer in Cd-97 with T-1/2 = 0.73(7) s was found, in good agreement with shell model predictions.
机译：在Riken Nishina Center进行了双魔法Sn-100附近的质子核核的衰变光谱试验。通过β衰减，βP衰减和随后的γ射线数据分析研究了由碎片反应产生的43 <= Z <= 50和N <= 51的20多核。由于统计数据更高，改善了许多地面和异构体的半衰期的精度。第一次测量8个核中的11个态的β-衰减端点能量，并且相应的Q（EC）和激发能量通常与各种质量模型一致。与文献值相比，首次或以更高的精度测量许多β延迟的质子发射分支比，其中一些差异超过2个σ。许多大差异与具有长寿异构状态的核有关，突出了这些测量中涉及的大型系统不确定性。观察到二十五个新的伽马射线，并提出了十个新州，具有明确的励磁能量，旋转和平等。兴奋状态的大多数能量在300keV或20％内一致，与壳体/中子（P-1/2，G（9/2））模型空间的壳模型预测相比，以较大者为准，这是较大的，假设SR -76核心。在CD-97中具有T-1/2 = 0.73（7）S的新（1/2（））异构体的签名与壳模型预测良好。

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  • 来源
    《Physical review, C》 |2019年第3期|共26页
  • 作者

    Park J.; Krucken R.; Lubos D.; Gernhaeuser R.; Lewitowicz M.; Nishimura S.; Ahn D. S.; Baba H.; Blank B.; Blazhev A.; Boutachkov P.; Browne F.; Celikovic I; de France G.; Doornenbal P.; Faestermann T.; Fang Y.; Fukuda N.; Giovinazzo J.; Goel N.; Gorska M.; Grawe H.; Ilieva S.; Inabe N.; Isobe T.; Jungclaus A.; Kameda D.; Kim G. D.; Kim Y-K; Kojouharov I; Kubo T.; Kurz N.; Kwon Y. K.; Lorusso G.; Moschner K.; Murai D.; Nishizuka I; Pate Z.; Rajabali M. M.; Rice S.; Sakurai H.; Schaffner H.; Shimizu Y.; Sinclair L.; Soderstrom P-A; Steiger K.; Sumikama T.; Suzuki H.; Takeda H.; Wang Z.; Watanabe H.; Wu J.; Xu Z. Y.;

  • 作者单位

    TRIUMF 4004 Wesbrook Mall Vancouver BC V6T 2A3 Canada;

    TRIUMF 4004 Wesbrook Mall Vancouver BC V6T 2A3 Canada;

    Tech Univ Munich Phys Dept D-85748 Garching Germany;

    Tech Univ Munich Phys Dept D-85748 Garching Germany;

    CEA DSM GANIL CNRS IN2P3 Blvd H Becquerel F-14076 Caen France;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    Ctr Etud Nucl Bordeaux Gradignan 19 Chemin Solarium CS 10120 F-33175 Gradignan France;

    Univ Cologne Inst Nucl Phys D-50937 Cologne Germany;

    GSI Helmholtzzentrum Schwerionenforsch GmbH D-64291 Darmstadt Germany;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    CEA DSM GANIL CNRS IN2P3 Blvd H Becquerel F-14076 Caen France;

    CEA DSM GANIL CNRS IN2P3 Blvd H Becquerel F-14076 Caen France;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    Tech Univ Munich Phys Dept D-85748 Garching Germany;

    Osaka Univ Machikaneyama Machi 1-1 Toyonaka Osaka 5600043 Japan;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    Ctr Etud Nucl Bordeaux Gradignan 19 Chemin Solarium CS 10120 F-33175 Gradignan France;

    GSI Helmholtzzentrum Schwerionenforsch GmbH D-64291 Darmstadt Germany;

    GSI Helmholtzzentrum Schwerionenforsch GmbH D-64291 Darmstadt Germany;

    GSI Helmholtzzentrum Schwerionenforsch GmbH D-64291 Darmstadt Germany;

    Tech Univ Darmstadt D-64289 Darmstadt Germany;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    CSIC IEM E-28006 Madrid Spain;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    Inst for Basic Sci Korea Rare Isotope Sci Project Daejeon 305811 South Korea;

    Inst for Basic Sci Korea Rare Isotope Sci Project Daejeon 305811 South Korea;

    GSI Helmholtzzentrum Schwerionenforsch GmbH D-64291 Darmstadt Germany;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    GSI Helmholtzzentrum Schwerionenforsch GmbH D-64291 Darmstadt Germany;

    Inst for Basic Sci Korea Rare Isotope Sci Project Daejeon 305811 South Korea;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    Univ Cologne Inst Nucl Phys D-50937 Cologne Germany;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    Tohoku Univ Fac Sci Dept Phys Sendai Miyagi 9800845 Japan;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    TRIUMF 4004 Wesbrook Mall Vancouver BC V6T 2A3 Canada;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    Univ Tokyo Bunkyo Ku 7-3-1 Hongo Tokyo 1130033 Japan;

    GSI Helmholtzzentrum Schwerionenforsch GmbH D-64291 Darmstadt Germany;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    Tech Univ Munich Phys Dept D-85748 Garching Germany;

    Tohoku Univ Fac Sci Dept Phys Sendai Miyagi 9800845 Japan;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    TRIUMF 4004 Wesbrook Mall Vancouver BC V6T 2A3 Canada;

    Beihang Univ Beijing 100191 Peoples R China;

    RIKEN Nishina Ctr Wako Saitama 3510198 Japan;

    Univ Tokyo Bunkyo Ku 7-3-1 Hongo Tokyo 1130033 Japan;

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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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