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In Memoriam: Ben R. Mottelson (1926–2022) 纪念:本·r·莫特尔森(1926-2022)
Q4 Physics and Astronomy Pub Date : 2022-07-03 DOI: 10.1080/10619127.2022.2100661
D. Bes
University of Notre Dame (Indiana, 1999); Distinguished Service Award of the Division of Nuclear Physics (2011). The citation of this last award summarizes John’s outstanding role in nuclear physics well: “For his decades of exemplary service to the Division of Nuclear Physics which have enhanced the strength and vitality of the Division as a unit of the American Physical Society, for his efforts on behalf of younger colleagues and the Bonner and Bethe prizes, and for his sage advice in faithful service on countless advisory committees and review panels.” Anybody who came a little closer to John admired his unbiased worldview. I had the opportunity to experience a little bit of this when we discussed, during his last year, the very different history of our respective fathers. I like to remember the visit of John and his wife Marianne to our retreat in the Austrian Alps (Figure 1). It reminds me of an old wisdom, supposedly from the Analects of Confucious: “Radiant days—don’t mourn that they are gone, smile that they happened.” This is how we should remember John, who enriched the life of so many of us. Figure 1. John and Marianne Schiffer on a hike with Walter and Gundl Kutschera to an “Alm" in the Austrian Alps (2006).
圣母大学(印第安纳州,1999);核物理学部杰出服务奖(2011年)。最后一个奖项的引证很好地总结了约翰在核物理学界的杰出作用:“他几十年来对核物理学部的模范服务,增强了该学部作为美国物理学会一个单位的力量和活力,他为年轻同事和博纳奖和贝特奖所做的努力,以及他在无数咨询委员会和审查小组中忠实地提供的明智建议。”任何接近约翰的人都钦佩他不偏不倚的世界观。在他的最后一年,当我们讨论我们各自父亲非常不同的历史时,我有机会体验到这一点。我喜欢记得约翰和他的妻子玛丽安来我们在奥地利阿尔卑斯山的隐居处(图1)。这让我想起了一句古老的智慧,据说来自《论语》:“灿烂的日子——不要为它的逝去而悲伤,微笑吧,为它的发生而微笑。”这就是我们应该记住约翰的方式,他丰富了我们许多人的生活。图1所示。约翰和玛丽安·希弗与沃尔特和冈德尔·库奇拉一起徒步前往奥地利阿尔卑斯山的“高山”(2006年)。
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引用次数: 0
Shapes and Symmetries in Nuclei: From Experiment to Theory: SSNET'22 原子核的形状和对称性:从实验到理论;科学技术学报(英文版)'22
Q4 Physics and Astronomy Pub Date : 2022-07-03 DOI: 10.1080/10619127.2022.2100657
C. Petrache, J. Dudek
fiable. The overview talks and roundtable discussions allowed participants to emphasize and exchange best practices in these domains. At the seminar, the first results of surveys on diversity and on recognition of individual achievements in large collaborations organized by dedicated ECFA, NuPECC, and APPEC working groups were also shown and discussed. The JENA activities presented at the seminar reflecting the core and bottom-up approach of the crossresearch-domain strategies require concerted actions with the relevant funding agencies. One of the seminar days was dedicated to presentations and closed session discussions with the representatives of the European funding agencies and of the European Commission. They were invited to evaluate whether appropriate funding schemes and organizational structures can be established to exploit synergies between the fields and thus enable a more efficient use of resources. The positive and constructive feedback from the funding agencies represented and the European Commission representatives motivates and strengthens the seminar organizers to continue on the chosen path with JENAS. The expressed recommendations and feedback from the seminar participants and from the funding agencies will be considered very thoroughly and, in particular, the third JENA seminar in about three years from now will be planned very carefully and consulted about with the three communities and with the funding agencies at an early stage. The excellent organization and hospitality of the local organizers in Madrid, led by Maria Jose Garcia Borge, largely contributed to the success and the enjoyable atmosphere of JENAS 2022. Website: https://indico.cern.ch/event/ 1040535/
可靠。概述讲座和圆桌讨论使参与者能够强调和交流这些领域的最佳实践。在研讨会上,还展示和讨论了由ECFA、NuPECC和APPEC专门工作组组织的关于多样性和大型合作中个人成就认可的调查的第一批结果。研讨会上提出的JENA活动反映了跨研究领域战略的核心和自下而上方法,需要与有关供资机构采取协调一致的行动。其中一个研讨会日专门用于与欧洲供资机构和欧洲委员会的代表进行介绍和闭门会议讨论。请它们评价是否可以建立适当的筹资计划和组织结构,以利用各领域之间的协同作用,从而能够更有效地利用资源。来自与会的供资机构和欧洲委员会代表的积极和建设性反馈,激励和加强了研讨会组织者继续与JENAS选择的道路。讨论会与会者和供资机构提出的建议和反馈意见将得到非常彻底的审议,特别是将非常仔细地规划三年后举行的第三次耶拿讨论会,并在早期阶段与三个社区和供资机构进行协商。在Maria Jose Garcia Borge的领导下,马德里当地组织者的出色组织和热情好客,在很大程度上促成了JENAS 2022的成功和愉快的氛围。网址:https://indico.cern.ch/event/ 1040535/
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引用次数: 0
The Belgian Nuclear Research Centre (SCK CEN) 比利时核研究中心(SCK CEN)
Q4 Physics and Astronomy Pub Date : 2022-04-03 DOI: 10.1080/10619127.2022.2062995
L. Popescu, H. Abderrahim, M. Ooms, Koen Hasaers
SCK CEN Introduction The Belgian Nuclear Research Centre (SCK CEN) was founded in the 1950s to study the applications of nuclear energy, but since then it has expanded its knowledge to a wide range of research fields, with a strongly future-oriented and international focus. This is one of the largest research institutions in Belgium, registering more than 900 employees. Nuclear materials science, advanced nuclear systems, environment, health and safety: for 70 years, research carried out in this center has covered a wide range of topics to the benefit of society, government, and industry. In the following sections, we make a review of major research projects and infrastructure of relevance for medical isotopes and nuclear physics programs.
比利时核研究中心(SCK CEN)成立于20世纪50年代,旨在研究核能的应用,但从那时起,它已将其知识扩展到广泛的研究领域,具有强烈的未来导向和国际焦点。这是比利时最大的研究机构之一,注册员工超过900人。核材料科学、先进核系统、环境、健康与安全:70年来,该中心开展的研究涵盖了广泛的主题,造福于社会、政府和工业。在接下来的章节中,我们将回顾与医学同位素和核物理项目相关的主要研究项目和基础设施。
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引用次数: 0
Reiner Kruecken Appointed Director of the Nuclear Science Division at Lawrence Berkeley National Laboratory Reiner Kruecken被任命为劳伦斯伯克利国家实验室核科学部主任
Q4 Physics and Astronomy Pub Date : 2022-04-03 DOI: 10.1080/10619127.2022.2063637
R. Casten
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引用次数: 0
The Cyclotron Hall of Louvain-la-Neuve, Birthplace of Postaccelerated Radioactive Ion Beams for Nuclear and Astrophysics Research 鲁万-拉-纽夫回旋大厅,核和天体物理研究的后加速放射性离子束的诞生地
Q4 Physics and Astronomy Pub Date : 2022-04-03 DOI: 10.1080/10619127.2022.2063635
M. Huyse, P. Van Duppen
The European Physical Society (EPS), upon nomination by the Belgian Physical Society, has decided to confer a Historic Site Award to the Cyclotron Hall in Louvain-la-Neuve (Figure 1). This place hosted in 1990 a worldleading nuclear-astrophysics experiment involving for the first time the post-acceleration of a short-lived radioactive element and the successful study of a key nuclear reaction in the stars. This world premiere was the result of an intensive collaboration between research teams from three Belgian universities: ULB, KU Leuven and UCLouvain. There are only two other EPS historic sites in Belgium (EPS Historic Sites European Physical Society (EPS): the Hotel Metropole in Brussels (‘In 1911, the Hotel was the venue of the Solvay Council, dedicated to what soon would be called “The Theory of Radiation & Quanta”’) and the Heilige-Geest college in Leuven (“Georges Lemaître, original founder of the theory of the Big Bang, developed in this college his ideas about an expanding universe consistent with theory and observations”). To celebrate this event, a commemorative plate was unveiled on Tuesday, 12 October 2021, at the “de Hemptinne” building of UCLouvain, which hosts the Cyclotron Hall (Figure 1). The commemorative plate holds the following text: This building has hosted a worldleading nuclear-physics experiment involving the post-acceleration of shortlived radioactive nuclides. A beam of N, an unstable isotope of nitrogen with a half-life of 10 minutes, was produced for the first time on 21 June 1989 by coupling two cyclotrons with an on-line ion source. In December 1990, the energy, intensity, and purity of the beam allowed the successful study of the key stellar reaction within the hot Carbon-NitrogenOxygen (CNO) cycle: N + H -> 14 O + γ. The technologies and instrumentation developed to produce and use energetic radioactive ion beams, and the evidence that it was then possible to perform detailed nuclear-reaction studies with short-lived radioactive isotopes, has given rise to the birth of new research fields in nuclear physics and astrophysics. This breakthrough in accelerator, nuclear-physics and nuclear-astrophysics research was the result of an intensive collaboration between teams from the Belgian universities ULB, KU Leuven and UCLouvain. It paved the way for a multitude of challenging experiments with radioactive ion beams involving major European collaborations and has led to the construction of significant facilities for producing radioactive ion beams in many countries around the world. Since then, the field of radioactive ion beams, produced with the postaccelerated isotope separator on-line technique or with the complementary in-flight technique, has blossomed all over the world, giving rise to the new Radioactive Nuclear Beams (RNB) conference series, of which the second one took place in 1991 in Louvain-la-Neuve soon after the pioneering experiment. The “Euroschool on Exotic Beams,” dedicated to training of Ph.D. stude
经比利时物理学会提名,欧洲物理学会(EPS)决定授予位于卢万-拉-纽夫(Louvain-la-Neuve)的回旋加速器大厅(Cyclotron Hall)历史遗址奖(图1)。1990年,这个地方举办了一项世界领先的核天体物理学实验,首次涉及短寿命放射性元素的后加速,并成功研究了恒星中的关键核反应。这次全球首演是来自比利时三所大学(ULB、KU Leuven和UCLouvain)的研究团队密切合作的结果。在比利时,只有另外两个EPS历史遗址(EPS历史遗址欧洲物理学会(EPS)):布鲁塞尔的大都会酒店(“1911年,该酒店是索尔维理事会的会场,致力于不久将被称为“辐射与量子理论”)和鲁汶的海利格-吉斯学院(“大爆炸理论的原始创始人Georges lematre,在这个学院发展了他关于宇宙膨胀与理论和观测相一致的想法”)。为了庆祝这一事件,纪念板于2021年10月12日星期二在UCLouvain的“de Hemptinne”大楼揭幕,该大楼设有回旋加速器大厅(图1)。纪念板上写着以下文字:这座建筑举办了一项世界领先的核物理实验,涉及短寿命放射性核素的后加速。1989年6月21日,通过将两个回旋加速器与联机离子源耦合,首次产生了半衰期为10分钟的氮的不稳定同位素N束。1990年12月,该光束的能量、强度和纯度使人们能够成功地研究热碳-氮-氧(CNO)循环中的关键恒星反应:N + H -> 14 O + γ。产生和使用高能放射性离子束的技术和仪器的发展,以及用短寿命放射性同位素进行详细核反应研究成为可能的证据,导致了核物理学和天体物理学中新的研究领域的诞生。这一加速器、核物理和核天体物理研究的突破是来自比利时鲁汶大学、鲁汶大学和鲁汶大学的团队密切合作的结果。它为涉及欧洲主要合作的放射性离子束的大量具有挑战性的实验铺平了道路,并导致世界上许多国家建造了生产放射性离子束的重要设施。此后,采用后加速同位素分离器在线技术或与之互补的飞行技术产生的放射性离子束领域在世界各地蓬勃发展,产生了新的放射性核束(RNB)系列会议,其中第二次会议于1991年在开创性实验后不久在卢万-拉-纽夫举行。“欧洲外来光束学院”致力于培养放射性光束科学的博士生和年轻研究人员,于1993年启动,直到2000年在鲁汶大学主持。从那时起,它走遍了欧洲,并于2017年回到鲁汶,庆祝第25所学校。2011年,第一届放射性同位素科学进展会议在鲁汶召开,是外来核与原子质量会议和RNB会议的合并,现在是该领域的旗舰会议。
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引用次数: 0
Report on MESON2021 MESON2021报告
Q4 Physics and Astronomy Pub Date : 2022-04-03 DOI: 10.1080/10619127.2022.2063626
C. Curceanu, J. Ritman, P. Salabura
The 16th International Workshop on Meson Physics took place 17–20 May 2021 (Figure 1). The workshop has a long tradition and is organized every two years by the Institute of Physics of the Jagiellonian University, Forschungszentrum Juelich, Italian Institute for Nuclear Physics-Frascati National Laboratories (LNF) Frascati, and Institute of Nuclear Physics Polish Academy of Science. Due to the pandemic situation, the meeting was delayed one year and held on-line via the Zoom platform. The virtual format unfortunately prevented participants from enjoying the traditional longnight discussions after the conference sessions in the unique atmosphere of the old Kraków city. Nevertheless, more than 230 participants registered and participated in the plenary and three parallel sessions scheduled every day. The many excellent talks were selected in the tradition for this conference, which is to cover a broad scientific program rather than only focus on a specific topic. During the first two days, the production, properties, and structure of mesons composed of heavy and light quarks were widely discussed. In particular, the newly discovered exotic states were presented by experimentalists and interpreted by various theoretical approaches. Other aspects that were lively discussed were the interaction of mesons with mesons and baryons in vacuum and hot and dense matter investigated in heavy ion collisions at various energy scales from the Schwerionensynchrotron (SIS) at the Society for Heavy Ion Research to the Large Hadron Collider. The next two days were devoted to studies of nucleon structure, nucleon–antikaon, and hyperon–nucleon interactions. In particular, new results of precision experiments searching for a neutron dipole moment and new results of proton radius should be singled out. Presented results of experimental and theoretical studies of hyperon–nucleon correlation functions in heavy ion collisions reveal an exciting possibility to access the corresponding interaction potentials, which might have an important impact on the understanding of the nature of compact neutron stars and provide a strong link between hadron physics and astrophysics. The final session was concluded with a presentation of new exciting results of the g-2 experiment at Fermilab and mysterious signal of the new X17 particle claimed to be a candidate for a dark photon. It is of course not possible to list all the interesting topics discussed in the conference in this short report. All interested readers are invited to look into the talks, which are available on the conference web page (https:// meson.if.uj.edu.pl). Some presentations, with the permission of the speakers, were recorded and can be replayed by those registered to the conference. The next MESON conference is scheduled for 2023 in an “old good traditional mode” and the organizing team already cordially invites all those interested to join us in Cracow! Please stay tuned and watch the conference web page MESON Confe
第16届介子物理国际研讨会于2021年5月17日至20日举行(图1)。该研讨会具有悠久的传统,每两年由雅盖隆大学物理研究所,Forschungszentrum Juelich,意大利核物理研究所-Frascati国家实验室(LNF) Frascati和波兰科学院核物理研究所组织。由于疫情原因,会议推迟一年,通过Zoom平台在线召开。不幸的是,虚拟形式使与会者无法在古老的Kraków城市的独特氛围中享受会议结束后传统的通宵讨论。然而,230多名与会者登记并参加了每天安排的全体会议和三次平行会议。按照传统,本次会议选择了许多优秀的演讲,这是为了涵盖一个广泛的科学计划,而不是只关注一个特定的主题。在前两天,我们广泛讨论了由重夸克和轻夸克组成的介子的产生、性质和结构。特别是,新发现的奇异态是由实验家提出的,并由各种理论方法解释。其他热烈讨论的方面是介子与介子和重子在真空中的相互作用,以及从重离子研究协会的Schwerionensynchrotron (SIS)到大型强子对撞机在各种能量尺度上的重离子碰撞中研究的热致密物质。接下来的两天致力于核子结构、核子-反介子和超子-核子相互作用的研究。特别是寻找中子偶极矩的精密实验的新结果和质子半径的新结果应该被挑出来。重离子碰撞中超子-核子相关函数的实验和理论研究结果揭示了获得相应相互作用势的令人兴奋的可能性,这可能对理解致密中子星的本质产生重要影响,并在强子物理学和天体物理学之间提供强有力的联系。最后的会议以费米实验室g-2实验的新令人兴奋的结果和新X17粒子的神秘信号作为暗光子的候选者而结束。当然,不可能在这篇简短的报告中列出会议中讨论的所有有趣的话题。所有感兴趣的读者都可以在会议的网页(https:// meson.if.uj.edu.pl)上查看这些演讲。在发言者的许可下,有些发言被录了下来,会议的注册人可以重播。下一届MESON会议将于2023年以“传统模式”举行,组织团队已经诚挚邀请所有感兴趣的人加入我们在克拉科夫的会议!请继续关注MESON会议网页。
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引用次数: 0
Superconducting Linac Booster for Super-Heavy Element Experiments at RIKEN Radioactive Isotope Beam Factory 日本理化学研究所放射性同位素束流厂超重元素实验超导直线加速器
Q4 Physics and Astronomy Pub Date : 2022-04-03 DOI: 10.1080/10619127.2022.2063001
N. Sakamoto, T. Nagatomo
Abstract The Rikagaku Kenkyūjo (RIKEN) heavy-ion linac was upgraded by introducing a new super-conducting linac-booster to advance the super-heavy elements synthesis program beyond nihonium at the RIKEN Radioactive Isotope Beam Factory (RIBF). The total acceleration voltage was upgraded from 25 MV with 12 room temperature drift-tube-linacs (DTLs) to 39 MV by introducing a superconducting linac booster, SRILAC. The upgrade of the beam intensity is realized by a newly constructed superconducting electron-cyclotron resonance ion source (SC-ECRIS). The construction of SRILAC and the SC-ECRIS started in FY2017. After the hardware installation and commissioning, the first beam acceleration test was successfully conducted at the end of FY2019, and user beam service was started in FY2020. This article provides an overview of the upgrade and its present performance.
Rikagaku Kenkyūjo (RIKEN)重离子直线加速器通过引入新的超导直线加速器进行升级,以推进RIKEN放射性同位素束流工厂(RIBF)的超重元素合成计划。通过引入超导直线增压器SRILAC,总加速电压从采用12个室温漂移管直线增压器(dtl)的25 MV提升到39 MV。新型超导电子回旋共振离子源(SC-ECRIS)实现了束流强度的提升。SRILAC和SC-ECRIS的建设于2017财年开始。硬件安装调试完成后,2019财年末首次波束加速测试成功,2020财年开始用户波束服务。本文提供了升级及其当前性能的概述。
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引用次数: 0
Fifty Years of Backbending 五十年御术
Q4 Physics and Astronomy Pub Date : 2022-04-03 DOI: 10.1080/10619127.2022.2063000
R. Wyss, M. Riley
Abstract While being on a picnic, if you are not sure whether you brought the boiled or the raw eggs in your basket, there is a simple way of telling without smashing them open: Simply spin them. The boiled egg will spin very fast when you rotate it, whereas the raw egg will resist the spinning motion. Nuclear physicists make nuclei spin to study their internal features. Some 50 years ago a most astonishing effect was observed in rapidly rotating nuclei. This surprise discovery, known as backbending, which is a unique phenomenon in the finite, many-body quantum system, triggered a revolution of our studies into the structure of the atomic nucleus that continues to the present day.
在野餐的时候,如果你不确定篮子里是煮鸡蛋还是生鸡蛋,有一个简单的方法可以告诉你,而不用把它们打碎:简单地旋转它们。当你旋转煮熟的鸡蛋时,它会旋转得很快,而生鸡蛋会抵抗旋转运动。核物理学家使原子核自旋以研究其内部特征。大约50年前,在快速旋转的原子核中观察到一种最惊人的效应。这一惊人的发现被称为“后弯”,它是有限多体量子系统中的一种独特现象,引发了我们对原子核结构研究的一场革命,一直持续到今天。
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引用次数: 1
CYCLHAD: A French Facility Dedicated for Research and Treatment in Hadrontherapy CYCLHAD:法国一家致力于强龙疗法研究和治疗的机构
Q4 Physics and Astronomy Pub Date : 2022-04-03 DOI: 10.1080/10619127.2022.2063002
F. Chevalier, P. Lesueur, G. Gaubert
Introduction For many years, the efforts to develop the hadrontherapy in Caen were made and supported by the Region Normandy. This hadrontherapy project, the Advanced Resource Center for Hadrontherapy in Europe (ARCHADE), described later, has led after many years of continuous efforts with partners to build its cornerstone: the CYCLHAD facility. CYCLHAD is a private company whose main shareholders are Ion Beam Applications (IBA; Louvain La Neuve), SAPHYN (a semipublic company based in Caen), and other private and clinical partners. The main purpose is to provide a cyclotrons-based facility for ion-beam therapy, starting with protons, and a multibeams research platform up to 400 MeV/n carbon beams. Thus, it is a dual-purpose building for healthcare and science. After an intensive planning period, at the end of 2014, CYCLHAD signed a contract awarded to the VINCI Group for the conception, construction, and maintenance of the building. At the same time, CYCLHAD contracted with IBA to acquire a ProteusOne® system together with its maintenance and operation. The construction of the main building started a year later and the beam was completed in September 2017. In parallel, IBA installed the Proteus-One®, which was delivered in May 2018. This proton facility is now clinically used by the anticancer center François Baclesse through an agreement to buy proton hours to CYCLHAD. The first treatment of a patient started in July 2018. To complete the facility, CYCLHAD appointed the Normandy Hadrontherapy company (NHa) to design and deliver the next cyclotronbased carbon facility (C400) through a contract signed in 2019. This new system, the Système de Recherche et de Traitement en Hadrontherapie (SRTH), will fit in the already built bunker (Figure 1), which is prepared to contain the C400 cyclotron accelerator and three beam-lines serving three clinical and experimental rooms (medical, radiobiology, and physics). First extracted beams are awaited around 2025–2026. CYCLHAD is also offering several hundreds of meter square of laboratories, which have to be equipped to host local groups and welcome visiting scientists.
多年来,卡昂的强韧疗法的发展得到了诺曼底大区的大力支持。这个强龙治疗项目,即欧洲强龙治疗高级资源中心(ARCHADE),经过多年与合作伙伴的持续努力,建立了它的基石:CYCLHAD设施。CYCLHAD是一家私营公司,其主要股东是Ion Beam Applications (IBA;Louvain La Neuve)、SAPHYN(一家位于卡昂的半上市公司)以及其他私人和临床合作伙伴。主要目的是为离子束治疗提供一个以回旋加速器为基础的设施,从质子开始,以及一个高达400 MeV/n碳束的多束研究平台。因此,它是一个医疗和科学双重用途的建筑。经过密集的规划期,在2014年底,CYCLHAD与VINCI集团签订了一份合同,负责该建筑的构思、建造和维护。与此同时,CYCLHAD与IBA签订合同,购买ProteusOne®系统及其维护和操作。主楼的建设在一年后开始,横梁于2017年9月完工。与此同时,IBA安装了Proteus-One®,该产品于2018年5月交付。通过向CYCLHAD购买质子小时的协议,该质子设备现在被抗癌中心franois Baclesse临床使用。患者的第一次治疗始于2018年7月。为了完成该设施,CYCLHAD通过2019年签署的合同委托诺曼底强子疗法公司(NHa)设计和交付下一个基于回旋加速器的碳设施(C400)。这个名为SRTH的新系统将安装在已经建成的掩体中(图1),该掩体准备容纳C400回旋加速器和三条光束线,服务于三个临床和实验房间(医学、放射生物学和物理学)。第一批提取的光束预计在2025-2026年左右。CYCLHAD还提供了几百平方米的实验室,这些实验室必须配备接待当地团体和欢迎来访的科学家的设备。
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引用次数: 1
The Social Benefits of Investing in Science 科学投资的社会效益
Q4 Physics and Astronomy Pub Date : 2022-04-03 DOI: 10.1080/10619127.2022.2062987
M. Florio
This is nicely said, and the unexpected utility may be apparent ex-post. But what about ex-ante, when decisions must be taken, and governments convinced to fund a new project? With an interdisciplinary team in Milan (University of Milan, Department of Economics, Department of Physics, and with the Centro Studi Industria Leggera [CSIL, Center for Industrial Studies]) we have designed and tested a social cost–benefit analysis model for large-scale facilities [2, 3]. The surprising result of our approach is that, even leaving aside the unknown future impact of discoveries, there are impact pathways that create social value in the short to medium term, and these effects can be quantitatively predicted in a stochastic framework. For example, we have been able to forecast the Benefit/Cost Ratio of the High Luminosity Large Hadron Collider (LHC), an upgrade of the previous collider, currently under construction [4]. Against an investment cost around one billion Swiss Francs, the B/C ratio is predicted as 1.76: this means that for every Franc spent on the HL-LHC 1.76 Franc of benefits for the society are generated. After a Montecarlo simulation (50,000 runs) the probability of a negative NPV is just 6%, even under very conservative assumptions on the potentials for the generated benefits. The benefits in this context arise from three main pathways, each of them measured for convenience by a money metric: first, impact on the production of scientific output (publications, citations, and further waves of literature) and on the careers of early stage researchers, including Ph.D. students and postdocs (a human capital effect measurable by an expected salary premium); second, direct and indirect impact for technology suppliers and users of innovations (including for software, medical imaging, new materials); finally, cultural impacts for both actual visitors of the facilities (including online visitors) and for citizens who consider science as a public good and are virtually willing to pay for it (this is revealed by carefully designed experiments with surveys of representative samples of taxpayers in France and Switzerland). After all, we do not need to just hope that the knowledge derived from large-scale facilities in physics will be useful to citizens in the distant future. In fact, we can predict that investing in science starts to pay back for itself from the first day.
这句话说得很好,而且意想不到的实用程序在事后可能是显而易见的。但是,当必须做出决定,说服政府为新项目提供资金时,事前又该如何呢?我们与米兰的一个跨学科团队(米兰大学经济系、物理系和工业研究中心)一起设计并测试了大型设施的社会成本效益分析模型[2,3]。我们的方法令人惊讶的结果是,即使不考虑发现的未知未来影响,也存在在中短期内创造社会价值的影响途径,这些影响可以在随机框架中定量预测。例如,我们已经能够预测高亮度大型强子对撞机(LHC)的效益/成本比,LHC是目前正在建设中的前一个对撞机的升级版。对于一项耗资约10亿瑞士法郎的投资,预计B/C比率为1.76:这意味着在HL-LHC上每花费一个法郎,就会为社会产生1.76法郎的效益。在蒙特卡罗模拟(50,000次运行)之后,即使在对产生的潜在效益的非常保守的假设下,负NPV的概率也只有6%。在这种情况下,好处来自三个主要途径,每一个途径都是为了方便起见而用金钱衡量的:首先,对科学产出(出版物、引用和进一步的文献浪潮)和早期研究人员(包括博士生和博士后)职业生涯的影响(通过预期工资溢价衡量的人力资本效应);第二,创新对技术供应商和用户(包括软件、医学成像、新材料)的直接和间接影响;最后,对设施的实际访客(包括在线访客)和将科学视为公共利益并实际上愿意为此付费的公民的文化影响(这是通过对法国和瑞士纳税人的代表性样本进行调查的精心设计的实验揭示的)。毕竟,我们不需要仅仅寄希望于从大型物理设施中获得的知识在遥远的未来对公民有用。事实上,我们可以预测,在科学上的投资从第一天开始就会得到回报。
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