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Fluorescent bicolour sensor for low-background neutrinoless double β decay experiments

机译：用于低背景中微子的荧光双色传感器双β衰减实验

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Observation of the neutrinoless double beta decay is the only practical way to establish that neutrinos are their own antiparticles(1). Because of the small masses of neutrinos, the lifetime of neutrinoless double beta decay is expected to be at least ten orders of magnitude greater than the typical lifetimes of natural radioactive chains, which can mimic the experimental signature of neutrinoless double beta decay(2). The most robust identification of neutrinoless double beta decay requires the definition of a signature signal-such as the observation of the daughter atom in the decay-that cannot be generated by radioactive backgrounds, as well as excellent energy resolution. In particular, the neutrinoless double beta decay of(136)Xe could be established by detecting the daughter atom,Ba-136(2+), in its doubly ionized state(3-8). Here we demonstrate an important step towards a 'barium-tagging' experiment, which identifies double beta decay through the detection of a single Ba(2+)ion. We propose a fluorescent bicolour indicator as the core of a sensor that can detect single Ba(2+)ions in a high-pressure xenon gas detector. In a sensor made of a monolayer of such indicators, the Ba(2+)dication would be captured by one of the molecules and generate a Ba2+-coordinated species with distinct photophysical properties. The presence of such a single Ba2+-coordinated indicator would be revealed by its response to repeated interrogation with a laser system, enabling the development of a sensor able to detect single Ba(2+)ions in high-pressure xenon gas detectors for barium-tagging experiments.A fluorescent bicolour sensor is proposed as the basis of a barium-tagging technique for the detection of neutrinoless double beta decay in xenon gas experiments.
机译：观察中微子双β衰减是建立中微子是他们自己的抗颗粒（1）的唯一实用方法。由于中微子的小块，中微子双β衰减的寿命预计比天然放射性链的典型寿命高至少10个数量级，这可以模拟中性抑制双β衰减的实验签名（2）。中微子双β衰减的最稳定识别需要定义签名信号 - 例如在衰变中观察子原子 - 这不能由放射性背景以及优异的能量分辨率产生。特别地，通过在其双电离状态（3-8）中检测子原子，Ba-136（2+）来建立（136）XE的中性碱基双β衰减。在这里，我们向“钡标签”实验表现出一个重要的步骤，通过检测单个BA（2+）离子来识别双β腐烂。我们将荧光双色指示器提出作为传感器的核心，其可以检测高压氙气探测器中的单个BA（2+）离子。在由单层制成的这种指示剂制成的传感器中，将被其中一种分子捕获BA（2+）次数，并产生具有不同光药性的BA2 + - 抵制物质。这种单一BA2 + -Choordinated指标的存在将通过响应与激光系统重复询问，使得能够在高压氙气探测器中检测单个BA（2+）离子的传感器进行钡 - 标记实验。提出了荧光性双色传感器作为在氙气实验中检测中微子双β衰减的钡标签技术的基础。

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  • 来源
    《Nature》 |2020年第7814期|48-54|共7页
  • 作者

    Rivilla Ivan; Aparicio Borja; Bueno Juan M.; Casanova David; Tonnele Claire; Freixa Zoraida; Herrero Pablo; Rogero Celia; Miranda Jose I; Martinez-Ojeda Rosa M.; Monrabal Francesc; Olave Benet; Schafer Thomas; Artal Pablo; Nygren David; Cossio Fernando P.; Gomez-Cadenas Juan J.;

  • 作者单位

    Donostia Int Phys Ctr DIPC San Sebastian Spain;

    Univ Basque Country UPV EHU Dept Organ Chem 1 Ctr Innovac Quim Avanzada ORFEO CINQA San Sebastian Spain;

    Univ Murcia Lab Opt LOUM Murcia Spain|Univ Murcia Ctr Invest Opt & Nanofis CiOyN Murcia Spain;

    Donostia Int Phys Ctr DIPC San Sebastian Spain|Ikerbasque Basque Fdn Sci Bilbao Spain;

    Donostia Int Phys Ctr DIPC San Sebastian Spain;

    Ikerbasque Basque Fdn Sci Bilbao Spain|Univ Basque Country UPV EHU Fac Chem Dept Appl Chem San Sebastian Spain;

    Donostia Int Phys Ctr DIPC San Sebastian Spain;

    Donostia Int Phys Ctr DIPC San Sebastian Spain|Mat Phys Ctr CFM CSIC UPV EHU San Sebastian Spain;

    Univ Basque Country UPV EHU SGIker NMR Facil San Sebastian Spain;

    Univ Murcia Lab Opt LOUM Murcia Spain|Univ Murcia Ctr Invest Opt & Nanofis CiOyN Murcia Spain;

    Donostia Int Phys Ctr DIPC San Sebastian Spain|Ikerbasque Basque Fdn Sci Bilbao Spain;

    Univ Basque Country UPV EHU POLYMAT NanoBioSeparat Grp San Sebastian Spain;

    Ikerbasque Basque Fdn Sci Bilbao Spain|Univ Basque Country UPV EHU POLYMAT NanoBioSeparat Grp San Sebastian Spain;

    Univ Murcia Lab Opt LOUM Murcia Spain|Univ Murcia Ctr Invest Opt & Nanofis CiOyN Murcia Spain;

    Univ Texas Arlington Dept Phys POB 19059 Arlington TX 76019 USA;

    Donostia Int Phys Ctr DIPC San Sebastian Spain|Univ Basque Country UPV EHU Dept Organ Chem 1 Ctr Innovac Quim Avanzada ORFEO CINQA San Sebastian Spain;

    Donostia Int Phys Ctr DIPC San Sebastian Spain|Ikerbasque Basque Fdn Sci Bilbao Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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