The AGATA Spectrometer

AGATA 光谱仪

基本信息

  • 批准号:
    ST/I504940/1
  • 负责人:
  • 金额:
    $ 7.84万
  • 依托单位:
  • 依托单位国家:
    英国
  • 项目类别:
    Research Grant
  • 财政年份:
    2010
  • 资助国家:
    英国
  • 起止时间:
    2010 至 无数据
  • 项目状态:
    已结题

项目摘要

AGATA / the Advanced GAmma Tracking Array - will be the world's pre-eminent device for studies of the femtoscale structure of matter. By measuring the properties of gamma rays emitted by atomic nuclei with unprecedented sensitivity, AGATA will provide new insights into nuclear and sub-nuclear behaviour and will address fundamental issues such as the limits of nuclear existence and the origin of the elements in the universe. Recent experimental results have begun to suggest that nuclei far from stability may behave very differently from their near-stable neighbours. For a complete understanding of nuclear structure, we need to understand the behaviour of all atomic nuclei, not just the small subset close to stability. New experimental methods therefore need to be developed, to study nuclei ever further from stability. For example, radioactive-ion beam accelerators are now becoming available. Their use presents a wealth of new challenges; low beam intensities and high background counts will require new, ultra-sensitive experimental techniques. Gamma-ray spectroscopy is one of the foremost techniques for studying nuclear structure. For this reason, many technological advances in gamma-ray detection have been made over the years. In the 1980s, UK nuclear physicists pioneered the development of gamma-ray spectrometers made up of arrays of germanium detectors. A problem with such detectors is that the spectral response is impaired if a gamma ray scatters out of the detector without depositing its full energy. As a remedy, the method of escape suppression is used, whereby the germanium detector is surrounded by a second detector - a suppression shield - which vetoes scattered gamma rays. Although this method significantly improves the quality of the spectra, the shield occupies a valuable fraction of the 4pi solid angle, limiting the overall detection efficiency. In the 1990s developments culminated in two large spectrometers: Euroball (Europe) and Gammasphere (USA) each made up of ~100 escape-suppressed germanium detectors. A giant step forward would be made by dispensing with shields, and building a gamma-ray spectrometer solely from germanium detectors. Instead of vetoing, and losing, scattered gamma rays, they could be tracked from one detector to another. This is the underlying principle of AGATA. Although tracking sounds straightforward, in practice it is complex / it is necessary to record the energy and position of every gamma-ray interaction, in order to track a scattered gamma ray from one detector to another, and thereby determine its full energy by event reconstruction. The complexity however pays off as AGATA will have sensitivity over 1000 times better than its predecessors. Gamma-ray tracking is thus at the forefront of nuclear-physics research throughout the world. Tracking is also important in other fields, for example, in nuclear medical imaging where the reconstruction of gamma-ray energies will vastly improve resolution. AGATA will be developed and built by a large European collaboration of physicists from over 12 countries. The UK is a major part of the collaboration, exploiting its many years of leadership in the field, with expertise in several key areas. Ultimately AGATA will consist of 180 detectors. The project will be realized in phases; this request covers the phase from 2008 to 2012, where the aim is to build a quarter of the full array. Initially, a 15-detector sub-array - the AGATA Demonstrator - will be built; although its main purpose is to demonstrate the feasibility of tracking, it will be a powerful device in its own right. AGATA will be continually expanded, and will be operated at three European laboratories before 2012 each with different characteristics: initially at the stable-beam facility at Legnaro in Italy, and later at radioactive-beam facilities at GANIL in France and GSI in Germany. Following on from this grant period, the complete AGATA spectrometer will be built by 2015.
AGATA /先进伽马跟踪阵列-将成为世界上研究物质飞尺度结构的卓越设备。通过以前所未有的灵敏度测量原子核发出的伽马射线的特性,AGATA将为核和亚核行为提供新的见解,并将解决诸如核存在的极限和宇宙中元素的起源等基本问题。最近的实验结果已经开始表明,远离稳定的原子核的行为可能与接近稳定的原子核非常不同。为了全面了解核结构,我们需要了解所有原子核的行为,而不仅仅是接近稳定的一小部分。因此,需要发展新的实验方法来研究离稳定更远的原子核。例如,放射性离子束加速器现在已经可以使用。它们的使用带来了许多新的挑战;低光束强度和高背景计数将需要新的、超灵敏的实验技术。伽玛射线能谱是研究核结构的前沿技术之一。由于这个原因,多年来在伽马射线探测方面取得了许多技术进步。在20世纪80年代,英国核物理学家率先开发了由锗探测器阵列组成的伽马射线光谱仪。这种探测器的一个问题是,如果伽马射线散射出探测器而没有沉积其全部能量,则光谱响应会受到损害。作为补救措施,使用了逃逸抑制的方法,即锗探测器被第二个探测器包围-一个抑制屏蔽-它否决了散射的伽马射线。尽管该方法显著提高了光谱质量,但屏蔽占据了4 π立体角的宝贵部分,限制了整体检测效率。在20世纪90年代,两个大型光谱仪的发展达到高潮:Euroball(欧洲)和Gammasphere(美国),每个光谱仪由~100个逃逸抑制锗探测器组成。如果不用屏蔽,只用锗探测器制造伽马射线光谱仪,那将是向前迈出的一大步。它们可以从一个探测器追踪到另一个探测器,而不是被否决和丢失散射的伽马射线。这是AGATA的基本原则。虽然跟踪听起来很简单,但实际上它很复杂/为了跟踪从一个探测器到另一个探测器的散射伽马射线,从而通过事件重建确定其全部能量,必须记录每个伽马射线相互作用的能量和位置。然而,这种复杂性是值得的,因为AGATA的灵敏度将比其前身高1000倍以上。因此,伽马射线追踪是全世界核物理学研究的前沿。跟踪在其他领域也很重要,例如,在核医学成像中,伽马射线能量的重建将大大提高分辨率。AGATA将由来自12个国家的大型欧洲物理学家合作开发和建造。英国是合作的主要部分,利用其在该领域多年的领导地位,在几个关键领域拥有专业知识。最终,AGATA将由180个探测器组成。该项目将分阶段实施;该请求涵盖了2008年至2012年的阶段,目标是建设完整阵列的四分之一。最初,将建造一个15个探测器的子阵列——AGATA演示器;虽然它的主要目的是演示跟踪的可行性,但它本身就是一个强大的设备。AGATA将不断扩大,并将在2012年之前在三个欧洲实验室运行,每个实验室都有不同的特点:最初在意大利莱纳罗的稳定光束设施,后来在法国GANIL和德国GSI的放射性光束设施。从这个拨款期开始,完整的AGATA光谱仪将于2015年建成。

项目成果

期刊论文数量(6)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Isomeric Ratios in $^{206}$Hg
异构体比率(以 $^{206}$Hg 为单位)
  • DOI:
    10.5506/aphyspolb.46.601
  • 发表时间:
    2015
  • 期刊:
  • 影响因子:
    0.5
  • 作者:
    Alexander T
  • 通讯作者:
    Alexander T
AGATA-Advanced GAmma Tracking Array
Towards the Determination of Superdeformation in <sup><span class="cmr-7">42</span></sup>Ca
确定 <sup><span class="cmr-7">42</span></sup>Ca 中的超变形
  • DOI:
    10.5506/aphyspolb.44.617
  • 发表时间:
    2013
  • 期刊:
  • 影响因子:
    0.5
  • 作者:
    Hadynska-Klek K
  • 通讯作者:
    Hadynska-Klek K
The Lund-York-Cologne Calorimeter (LYCCA): Concept, Design and Prototype Developments for a FAIR-NUSTAR Detector System to Discriminate Relativistic Heavy-ion Reaction Products
  • DOI:
    10.1016/j.nima.2013.04.058
  • 发表时间:
    2013-09
  • 期刊:
  • 影响因子:
    1.4
  • 作者:
    P. Golubev;A. Wendt;L. Scruton;J. Taprogge;D. Rudolph;P. Reiter;M. Bentley;V. Avdeichikov;P. Boutachkov;S. Fox;J. Gerl;Christiane Görgen;R. Hoischen;N. Kurz;B. S. N. Singh;G. Pascovici;S. Pietri;H. Schaffner;M. Taylor;S. Thiel;H. Wollersheim
  • 通讯作者:
    P. Golubev;A. Wendt;L. Scruton;J. Taprogge;D. Rudolph;P. Reiter;M. Bentley;V. Avdeichikov;P. Boutachkov;S. Fox;J. Gerl;Christiane Görgen;R. Hoischen;N. Kurz;B. S. N. Singh;G. Pascovici;S. Pietri;H. Schaffner;M. Taylor;S. Thiel;H. Wollersheim
On the Road to FAIR: 1 st Operation of AGATA in PreSPEC at GSI
通往 FAIR 的道路:AGATA 在 GSI PreSPEC 中的第一次运行
  • DOI:
    10.1051/epjconf/20146602083
  • 发表时间:
    2014
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Pietralla N
  • 通讯作者:
    Pietralla N
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Robert Wadsworth其他文献

Observation of the proton emitter $${}_{\,57}^{116}$$ La59
对质子发射体$${}_{\,57}^{116}$$ La59 的观察
  • DOI:
    10.1038/s42005-022-01069-w
  • 发表时间:
    2022-11-14
  • 期刊:
  • 影响因子:
    5.800
  • 作者:
    Wei Zhang;Bo Cederwall;Özge Aktas;Xiaoyu Liu;Aysegül Ertoprak;Ayse Nyberg;Kalle Auranen;Betool Alayed;Hussam Badran;Helen Boston;Maria Doncel;Ulrika Forsberg;Tuomas Grahn;Paul T. Greenlees;Song Guo;Jacob Heery;Joshua Hilton;David Jenkins;Rauno Julin;Sakari Juutinen;Minna Luoma;Olavi Neuvonen;Joonas Ojala;Robert D. Page;Janne Pakarinen;Jari Partanen;Edward S. Paul;Costel Petrache;Panu Rahkila;Panu Ruotsalainen;Mikael Sandzelius;Jan Sarén;Stuart Szwec;Holly Tann;Juha Uusitalo;Robert Wadsworth
  • 通讯作者:
    Robert Wadsworth

Robert Wadsworth的其他文献

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{{ truncateString('Robert Wadsworth', 18)}}的其他基金

Nuclear Physics Consolidated Grant (Equipment)
核物理综合补助金(设备)
  • 批准号:
    ST/L005735/1
  • 财政年份:
    2014
  • 资助金额:
    $ 7.84万
  • 项目类别:
    Research Grant
Nuclear Physics Consolidated Grant
核物理综合拨款
  • 批准号:
    ST/L005727/1
  • 财政年份:
    2014
  • 资助金额:
    $ 7.84万
  • 项目类别:
    Research Grant
Nuclear Physics consolidated grant
核物理综合拨款
  • 批准号:
    ST/J000124/1
  • 财政年份:
    2011
  • 资助金额:
    $ 7.84万
  • 项目类别:
    Research Grant
Nuclear Physics Rolling Grant
核物理滚动资助
  • 批准号:
    ST/F012055/1
  • 财政年份:
    2008
  • 资助金额:
    $ 7.84万
  • 项目类别:
    Research Grant
The AGATA Spectrometer
AGATA 光谱仪
  • 批准号:
    ST/F004184/1
  • 财政年份:
    2008
  • 资助金额:
    $ 7.84万
  • 项目类别:
    Research Grant

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