LINUS is a project at the INFN Legnaro National Laboratories (LNL, Italy) to create a suite of different neutron sources (LSNS, NEPIR, SLOWNE) driven by existing accelerators. LSNS, driven by a 40 ...mA, 5 MeV proton RFQ, will use Li and Be targets to deliver cold, thermal, epithermal and fast neutrons. The SPES high current (0.75 mA), 70 MeV proton cyclotron will drive the NEPIR and SLOWNE facilities. NEPIR will alternatively deliver quasi mono-energetic neutrons with energy peak down to 20 MeV, and a neutron beam with a continuous energy distribution similar to that of neutrons present in the Earth atmosphere in the accessible energy range. SLOWNE is an intense neutron source for applications outside the LSNS range.
Since 2003 the presence of a new syndrome characterized by symptoms of stunting, chlorotic mottling, leaf deformation, reduced yields and quality has been reported in some white berry varieties of ...Vitis vinifera in Trentino‐Alto Adige and Friuli Venezia Giulia vineyards. The identification of a new virus, provisionally called Grapevine Pinot gris virus (GPGV), in a cv. Pinot gris vine suggested an association between this new syndrome and the virus presence (Giampetruzzi et al., 2012), however the contemporary presence of GPGV in both symptomatic and asymptomatic plants has still to be explained. In this work, a large‐scale monitoring over a 3‐year period (2012–14) of Friuli Venezia Giulia vineyards and nurseries has shown a widespread presence of GPGV in symptomatic plants and also in asymptomatic vines, even if at a slightly lower percentage. Quantitative analyses of the virus titer revealed a great variability in the viral content of both symptomatic and asymptomatic plants but the mean GPGV quantity in symptomatic vines was significantly higher than in asymptomatic plants.
Présence du Grapevine Pinot gris virus (GPGV) en Friuli Venezia Giulia (Italie). Suivi en plein champ et quantification du virus par la RT‐PCR en temps réel
Depuis 2003 la présence d'un nouveau syndrome caractérisé par des symptômes de rabougrissement, des marbrures chlorotiques, des déformations foliaires, et une réduction du rendement et de la qualité a été signalée sur des variétés à baies blanches de Vitis vinifera dans des vignobles en Trentino‐Alto Adige et Friuli Venezia Giulia. L'identification d'un nouveau virus, provisoirement appelé Grapevine Pinot gris virus (GPGV), dans une vigne de cépage Pinot gris a suggéré une association entre ce nouveau syndrome et la présence du virus (Giampetruzzi et al., 2012), bien que la présence simultanée du GPGV dans des plantes symptomatiques et asymptomatiques doivent encore être expliquée. Dans cette étude, un suivi à grande échelle des vignobles et pépinières de Friuli ‐Venezia Giulia sur une période de trois ans (2012‐2014) a permis de constater que le GPGV est largement répandu dans les plantes symptomatiques, mais également dans les plantes asymptomatiques, bien qu'à des pourcentages légèrement inférieurs. Les analyses quantitatives du titre du virus ont mis en évidence une grande variabilité de la charge virale des plantes tant symptomatiques qu'asymptomatiques, mais la quantité moyenne de GPGV dans les vignes symptomatiques était significativement plus élevée que dans les plantes asymptomatiques.
Bcтpeчaeмocть Grapevine Pinot Gris Virus (GPGV) в Фpиyли‐Beнeция‐Джyлия (Итaлия). Пoлeвoй мoнитopинг и виpycнaя квaнтификaция c пoмoщью ПЦP в peaльнoм вpeмeни
Haчинaя c 2003 гoдa o пoявлeнии нoвoгo cиндpoмa c cимптoмaми кapликoвocти, xлopoтичecкoй кpaпчaтocти, дeфopмaции лиcтьeв, cнижeния ypoжaйнocти и кaчecтвa cooбщaлocь пpимeнитeльнo к нeкoтopым copтaм бeлoгo винoгpaдa Vitis vinifera нa винoгpaдникax в Tpeнтинo‐Aльтo‐Aдиджe и Фpиyли‐Beнeция‐Джyлия. Идeнтификaция нoвoгo виpyca, вpeмeннo нaзвaннoгo Grapevine Pinot Gris Virus (GPGV) нa винoгpaдe copтa Пинo Гpи, вызвaлa пpeдпoлoжeниe o cвязи этoгo нoвoгo cиндpoмa c нaличиeм виpyca (Giampetruzzi et al., 2012), oднaкo нaблюдaeмoe в нacтoящee вpeмя нaличиe GPGV oднoвpeмeннo нa cимптoмныx и бeccимптoмныx pacтeнияx вce eщe нyждaeтcя в oбъяcнeнии. B xoдe этoй paбoты нa пpoтяжeнии тpex лeт (2012‐14) пpoвoдилcя кpyпнoмacштaбный мoнитopинг нa винoгpaдникax и питoмникax Фpиyли‐Beнeция‐Джyлия, кoтopый пpoдeмoнcтpиpoвaл шиpoкoe pacпpocтpaнeниe GPGV нa cимптoмныx pacтeнияx, нo тaкжe и нa бeccимптoмныx лoзax, xoтя и в нecкoлькo мeньшeй cтeпeни. Кoличecтвeнныe aнaлизы виpycнoгo титpa пoкaзaли бoльшyю вapиaбeльнocть виpycнoгo кoнтeнтa кaк cимптoмныx, тaк и бeccимптoмныx pacтeний, oднaкo cpeднee кoличecтвo GPGV нa cимптoмныx лoзax былo знaчитeльнo бoльшим, чeм нa бeccимптoмныx pacтeнияx.
Progress in the design and construction of SPES at INFN-LNL Bisoffi, G.; Prete, G.; Andrighetto, A. ...
Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms,
06/2016, Letnik:
376
Journal Article
Recenzirano
Odprti dostop
INFN-LNL is constructing an ISOL (Isotope Separation On Line) facility delivering neutron rich ion beams at 10AMeV or beyond, making use of the linear accelerator ALPI as the secondary accelerator. ...The facility includes a direct ISOL target based on UCx and able to reach 1013fissions/s. In parallel, an applied physics facility will be developed, with applications in medicine and neutron production. The SPES project is a national facility, approved and funded. Commissioning with the first exotic species is expected in 2019. The primary accelerator is a commercial cyclotron, which will send a 40MeV, 200μA proton beam onto an UCx target, connected to SIS, PIS and LIS ion sources. The extracted beam is purified through a Low Resolution Mass Separator (LMRS, i.e. a Wien filter and a dispersive dipole), a beam cooler and a High Resolution Mass Separator (HRMS) and sent to an ECR charge breeder to boost the exotic beam charge state. The highly charged exotic beam is further separated in a MRMS (Medium Resolution Mass Separator) and injected into a 100% duty cycle RFQ and into the existing superconducting linac ALPI, which will be refurbished and upgraded to be an efficient exotic beam accelerator. The upgrade of ALPI will give ∼10AMeV energy to 132Sn19+, taken as the reference ion beam. The paper presents the status of the design and construction of the SPES facility.
The Selective Production of Exotic Species (SPES) project is presently under development at INFN-LNL: aim of this project is the production, ionization and postacceleration of radioactive ions to ...perform forefront research in nuclear physics. An ECR-based charge breeder (SPES-CB) will allow post-acceleration of radioactive ions: in particular, the SPES-CB has been designed and developed by LPSC of Grenoble, based on the Phoenix booster. It will be equipped with a complete test bench totally integrated with the SPES beam line: this part of the post-accelerator, together with the newly designed RFQ, composes the so-called ADIGE injector (Acceleratore Di Ioni a Grande carica Esotici) for the superconducting linac ALPI. The injector will employ a unique Medium Resolution Mass Spectrometer (MRMS, resolving power 1/1000), mounted downstream the SPES-CB, in order to avoid the typical drawback of the ECR-based charge breeding technique, that is the beam contamination. This contribution describes the ADIGE injector, with particular attention to the analysis of possible contaminations and the performances expected for the MRMS, showing the beam dynamics calculations for a reference radioactive beam.
One-dimensional and three-dimensional dynamical fission calculations based on Langevin equations are performed for the compound nuclei 194Pb, 200Pb, 206Pb, 182Hg, and 204Hg to investigate the ...influence of the compound nucleus isospin on the prescission particle multiplicities and on the fission fragment mass–energy distribution. It is found that the prescission neutron, proton, and alpha particle multiplicities have approximately the same sensitivity to the dissipation strength for a given nucleus. This is at variance with conclusions of recent papers. The sensitivity of the calculated prescission particle multiplicities to the dissipation strength becomes higher with decreasing isospin of fissioning compound nucleus, and the increase of prescission particle multiplicities could reach 200%, when the reduction coefficient of one-body viscosity ks increases from 0.1 to 1, for the most neutron deficient nuclei considered. The variances of fission fragment mass and kinetic energy distributions are less sensitive to the change of dissipation strength than the prescission light particle multiplicities. A comparison to experimental data concerning 200Pb nucleus is also presented.
To investigate dietary habits among young people in the Mediterranean lands, exactly where the health benefits of the Mediterranean diet (MD) were discovered by Ancel Keys.
A cross-sectional study ...design.
A 10-items food-frequency questionnaire was administered to 1117 students in the schools of the Cilento area. Adherence to the MD was appraised according to a scale of 0-10. A logistic regression model was used to identify possible factors associated with "Following an unhealthy diet". Results were expressed as Odds Ratio with 95% confidence interval and the level of significance was set at p<0.05.
A percentage of 63.8 reached a score under six, indicating that the majority of the students did not respect the rules of the Mediterranean diet and only 36.2% (n. 371) exceeded a score of 6 adhering to it in varying degrees. At the logistic regression analysis smokers resulted to be affected by almost a double risk of getting away from the Mediterranean dietary pattern (OR = 1.93; CI 95% 1.44-2.57); on the contrary, those with a higher PCS12 (Physical Component Summary score) were in a lower risk to move away from the MD style (OR = 0.98; 95% CI = 0.96-0.99).
Despite its increasing popularity worldwide, adherence to the MD model is decreasing. The new generation of young people does not adhere to the MD pattern although they live in the lands characterized by the tradition and culture of healthy diet and where the benefits from this pattern were initially discovered. Interventions and specific education about the healthy diet may be useful to recover student's dietary patterns as in the old eating tradition.
Off-line emittance measurements of the SPES ion source at LNL Montano, J.; Vasquez, J.; Andrighetto, A. ...
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment,
08/2011, Letnik:
648, Številka:
1
Journal Article
Recenzirano
In the framework of the SPES Radioactive Beam Facility of INFN, a dedicated Ion Source R&D program has recently been started at the Legnaro Laboratory. The main goal is to study and improve its ...quality. The measurements of transverse phase space distributions of the ions produced in the target complex are of great importance for every ISOL based facility like for example SPES. In particular the phase space distribution becomes essential for the determination of simulation parameters and hence for the mass separation, the injection into traps and breeders, calculation of transport losses, etc. For these reasons a new beam emittance analyzer device, developed at the Legnaro laboratories, has recently been coupled with an off-line target front-end. The experimental measurements on the SPES surface ion source, using three different stable ion beams (Rb, Cs, Al), and their analysis, are presented here.
Status of the SPES Exotic Beam Facility Comunian, M; Andrighetto, A; Antonini, P ...
Journal of physics. Conference series,
01/2020, Letnik:
1401, Številka:
1
Journal Article
Recenzirano
Odprti dostop
At Legnaro National Laboratories of INFN is under construction a Rare Isotope Facility called "Selective Production of Exotic Species" (SPES) based on a 35-70 MeV proton cyclotron, able to deliver ...two beams with a total current up to 0.75 mA, an ISOL fission target station and an existing ALPI superconducting accelerator as a post accelerator (up to 10 MeV/u for A/q=7). The paper will cover notably: the high-resolution mass separator, the CW RFQ (80 MHz, 727 keV/u, with internal bunching), the 1+ low energy transfer line and the injection line from Charge Breeder to ALPI under installation.
Nuclear viscosity is an irreplaceable ingredient of nuclear fission collective dynamical models. It drives the exchange of energy between the collective variables and the thermal bath of single ...particle degrees of freedom. Its dependence on the shape and temperature is a matter of controversy. By using systems of intermediate fissility we have demonstrated in a recent study that the viscosity parameters is larger for compact shapes, and decreases for larger deformations of the fissioning system, at variance with the conclusions of the statistical model modified to include empirically viscosity and time scales. In this contribution we propose an experimental scenario to highlight the possible dependence of the viscosity from the temperature.
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