The TRIUMF-ISAC facility: two decades of discovery with rare isotope beams

Ball, G. C.; Hackman, G.; Krücken, R.

doi:10.1088/0031-8949/91/9/093002

Cited by 38 publications

(30 citation statements)

References 211 publications

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“…4(c)]. Using only the N 2 LO sat interaction, the ordering of the 5=2 þ and the 3=2 − is in qualitative agreement with the established ordering of the isospin analog resonances in the mirror 11 Be nucleus [14,46].…”

supporting

confidence: 77%

“…The experiment was performed in inverse kinematics at the ISAC rare isotope beam facility at TRIUMF [10,11] by bombarding a proton target with a 10 C beam. The beam with an average intensity of 2000 particles per second reaccelerated using ISAC-II superconducting linear accelerator [10,12], impinged on a solid hydrogen target at the IRIS reaction spectroscopy station [13].…”

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confidence: 99%

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Scattering Experiments Tease Out the Strong Force

Hjorth‐Jensen

2017

Physics

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How does nature hold together protons and neutrons to form the wide variety of complex nuclei in the Universe? Describing many-nucleon systems from the fundamental theory of quantum chromodynamics has been the greatest challenge in answering this question. The chiral effective field theory description of the nuclear force now makes this possible but requires certain parameters that are not uniquely determined. Defining the nuclear force needs identification of observables sensitive to the different parametrizations. From a measurement of proton elastic scattering on 10 C at TRIUMF and ab initio nuclear reaction calculations, we show that the shape and magnitude of the measured differential cross section is strongly sensitive to the nuclear force prescription.Understanding the strong nuclear force is of fundamental importance to decipher nature's way of building visible matter in our Universe. Yet, more than a century after the discovery of the nucleus, our knowledge of the nuclear force is still incomplete. The formulation by Weinberg of chiral effective field theory [1] enabled a major breakthrough in arriving at a fundamental understanding of the low-energy nuclear interactions of protons and neutrons, by forging the missing link with quantum chromodynamics. However, the question of how to best implement the theory and constrain it with experimental data remains an active topic of research, and has already led to several parametrizations of the nuclear force [2][3][4][5][6]. It is, therefore, important to identify experimental observables that are sensitive to different parametrizations of the chiral forces in order to reach a definitive description of the nuclear force. The study of many-nucleon systems enables a more complete understanding of the nuclear force. In particular, proton-rich and neutron-rich nuclei located at the edges of nuclear stability (drip lines) can amplify less-constrained features of the nuclear force, such as its dependence on the proton-neutron asymmetry. However, there is a lack of experimental data on the properties of these systems.Among the properties of the drip-line nuclei, we hypothesize in this work that the nucleon-nucleus scattering differential cross section is highly sensitive to the details of the nuclear force and, hence, can be used for constraining it. Indeed, it should reveal both the spectroscopic properties of the reacting system, such as phase shifts and their interference, as well as the effect of exotic nucleon distributions. This confluence brings a greater selectivity in the elastic scattering differential cross section than is possible by independently investigating resonance energies, binding energies, or radii. The observations reported here show that the shape and magnitude of the elastic scattering angular distribution places stringent constraints on the chiral interactions, while a study of resonance energies alone could lead to incomplete and/or misleading conclusions. The study of elastic scattering for drip-line nuclei is, however, challenging because o...

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confidence: 77%

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confidence: 99%

Scattering Experiments Tease Out the Strong Force

Hjorth‐Jensen

2017

Physics

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“…The radioactive isotopes were produced at TRIUMF's Isotope Separator and ACcelerator (ISAC) facility [26] in a low-power tantalum target by a 480 MeV, 40 µA proton beam.…”

Section: Experimental Descriptionmentioning

confidence: 99%

Quenching of the N=32 neutron shell closure studied via precision mass measurements of neutron-rich vanadium isotopes

et al. 2018

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We performed the first direct mass measurements of neutron-rich vanadium 52−55 V isotopes passing the N = 32 neutron shell closure with TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The new direct measurements confirm all previous indirect results. Through a reduced uncertainty of the mass of 55 V we confirm the quenching of the N = 32 neutron shell closure in vanadium. We discuss the evolution of the N = 32 neutron shell closure between K and Cr and show similar signatures in the half-life surface when studied along the isotopic chains.

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“…Invented almost 70 years ago in Copenhagen, the ISOL technique was further developed at CERN where the ISOLDE facility is currently running [ 2 ]. Nowadays other ISOL facilities, already operating or under construction, are disseminated around the world [ 3 , 4 , 5 , 6 ]. Thanks to such dissemination of know-how, the ISOL technique was further developed and studied resulting as one of the main techniques for on-line isotope production of high-intensity and high-quality radioactive ion beams [ 7 ].…”

Section: Introductionmentioning

confidence: 99%

Early Evaluation of Copper Radioisotope Production at ISOLPHARM

et al. 2018

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The ISOLPHARM (ISOL technique for radioPHARMaceuticals) project is dedicated to the development of high purity radiopharmaceuticals exploiting the radionuclides producible with the future Selective Production of Exotic Species (SPES) Isotope Separation On-Line (ISOL) facility at the Legnaro National Laboratories of the Italian National Institute for Nuclear Physics (INFN-LNL). At SPES, a proton beam (up to 70 MeV) extracted from a cyclotron will directly impinge a primary target, where the produced isotopes are released thanks to the high working temperatures (2000 °C), ionized, extracted and accelerated, and finally, after mass separation, only the desired nuclei are collected on a secondary target, free from isotopic contaminants that decrease their specific activity. A case study for such project is the evaluation of the feasibility of the ISOL production of 64Cu and 67Cu using a zirconium germanide target, currently under development. The producible activities of 64Cu and 67Cu were calculated by means of the Monte Carlo code FLUKA, whereas dedicated off-line tests with stable beams were performed at LNL to evaluate the capability to ionize and recover isotopically pure copper.

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The TRIUMF-ISAC facility: two decades of discovery with rare isotope beams

Cited by 38 publications

References 211 publications

Scattering Experiments Tease Out the Strong Force

Scattering Experiments Tease Out the Strong Force

Quenching of the N=32 neutron shell closure studied via precision mass measurements of neutron-rich vanadium isotopes

Early Evaluation of Copper Radioisotope Production at ISOLPHARM

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