Search results for "stopp"

showing 10 items of 75 documents

Energy losses of 252Cf fission fragments in thin foils

2006

Abstract The stopping power of fission fragments from 252Cf(sf) has been measured in thin foils of C, Ni, Au, Al2O3 and Mylar as a function of fragment mass and energy. The chosen stopping materials are frequently used as the backing of sources and targets or entrance windows of gas detectors. The experimental setup allowed registration of velocities of two fission fragments and energy of one of them. In this way fragment masses could be unambiguously determined and the pulse-height defect of the silicon detector verified. The measured stopping power data for fission fragments cover masses between A = 101 and A = 148. The results are compared with semi-empirical predictions of SRIM 2003 cod…

Nuclear and High Energy PhysicsRange (particle radiation)FissionDetectorchemistry.chemical_elementBohr modelIonNuclear physicssymbols.namesakeNickelchemistrysymbolsStopping power (particle radiation)Atomic physicsNuclear ExperimentInstrumentationCarbonNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Determination of electronic stopping powers of 0.05–1MeV/u 131Xe ions in C-, Ni- and Au-absorbers with calorimetric low temperature detectors

2017

Abstract A new experimental system for precise determination of electronic stopping powers of heavy ions has been set up at the accelerator laboratory of the University of Jyvaskyla. The new setup, combining an established B-ToF system and an array of calorimetric low temperature detectors (CLTDs), has been used for the determination of electronic stopping powers of 0.05–1 MeV/u 131Xe ions in carbon, nickel and gold. Thereby advantage of the improved linearity and energy resolution of CLTDs as compared to the previously used ionization detector was taken to reduce energy calibration errors and to increase sensitivity for the energy loss determination, in particular at very low energies. The…

Nuclear and High Energy PhysicsRange (particle radiation)ta114010308 nuclear & particles physicsChemistryDetectorLinearitychemistry.chemical_elementlow temperature detectorschanneling01 natural sciencesIonNickelstopping power0103 physical sciencesCalibrationStopping power (particle radiation)ddc:530CrystalliteToF-EAtomic physicsheavy ions010306 general physicsInstrumentationNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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New experimental molecular stopping cross section data of Al2O3, for heavy ions

2014

Abstract Molecular stopping cross section data of Al2O3, for heavy ions of 12C, 16O, 28Si, 35Cl, 79Br within the energy range of 0.01–1.0 MeV/nucleon were measured. Both direct transmission and bulk analysis methods were applied. Stopping cross sections were calculated both with the SRIM and MSTAR codes. Evaluation and intercomparison of the new data with the calculated and previously measured ones are reported in this paper.

Nuclear and High Energy PhysicsRange (particle radiation)ta114ChemistryHadronCarbon-12Stopping cross section ; Stopping power ; ERDA ; Heavy ion IBA ; Light element analysisCharged particleIonNuclear physicsBaryonStopping power (particle radiation)NucleonInstrumentation
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Stopping power measurement of 48Ca in a broad energy range in solid absorbers

2006

Abstract Stopping power of 48 Ca ions in C, Ni and Au was measured using TOF-E method. The results cover energy range from 0.1 to 5.3 MeV/u (5–250 MeV). The reliability of our experimental method was verified and confirmed by TOF–TOF measurements. The results are compared with theoretical (PASS) and semi empirical (SRIM2003) predictions.

Nuclear and High Energy PhysicsTime of flightRange (particle radiation)Reliability (semiconductor)ChemistryStopping power (particle radiation)Atomic physicsInstrumentationEnergy (signal processing)Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Stopping powers of havar and effective charge for 1.4–3.2 MeV/u 127I-ions

2000

Abstract Stopping powers of havar for 1.4–3.2 MeV/u 127 I-ions have been determined by the transmission technique using two geometrical arrangements. No previous data have been published for havar with this ion. The experimental data are compared with predictions obtained by using Bragg’s additivity rule with various parametrizations of the stopping power found in the literature. The values obtained by the parametrizations underestimate the experimental data by 5–11%. The empirical correction scheme of Thwaites yields values in rather good agreement with the present results, especially at energies above 1.9 MeV/u. The effective charges of the 127 I ions were also deduced from the experiment…

Nuclear physicsNuclear and High Energy PhysicsChemistryEmpirical correctionStopping power (particle radiation)Atomic physicsInstrumentationEffective nuclear chargeIonNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Stopping powers of havar for 1.6, 2.3 and 3.2 MeV/u heavy ions

2000

Abstract Stopping powers of havar for 28,30 Si-, 36 Ar-, 54,56 Fe- and 80,84 Kr-ions with energies of 1.6, 2.3 and 3.2 MeV/u have been determined by a transmission technique. Sample foils are exposed to the direct beams. No previous data for havar with these ions have been published. The obtained results are brought together with literature havar data for 1 H-, 4 He-, 7 Li-, 11 B-, 12 C-, 14 N-, 16 O- and 127 I-ions at the same ion velocity. The experimental data are compared with the values predicted by the SRIM-2000 parametrization using Bragg’s rule. A systematic underestimation, by 6–23%, of the experimental stopping powers was observed. The empirical correction scheme of Thwaites has b…

Nuclear physicsNuclear and High Energy PhysicsChemistryEmpirical correctionStopping power (particle radiation)Atomic physicsInstrumentationParametrizationEffective nuclear chargeIonNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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Energy loss of 132Xe-ions in thin foils

2009

Abstract The energy loss of 132Xe-ions in C, Al, Ni, Ag, Lu, Au, Pb and Th foils was measured in the energy range from 0.1 to 5 MeV/u using the TOF-E method. The results are compared with previously published data and with the predictions of several computer codes. They include theoretical codes: PASS, CASP, semi-empirical programs: SRIM, LET and the Hubert table predictions.

Nuclear physicsNuclear and High Energy PhysicsEnergy lossRange (particle radiation)ChemistryStopping power (particle radiation)Atomic physicsTable (information)InstrumentationIonNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
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First spatial separation of a heavy ion isomeric beam with a multiple-reflection time-of-flight mass spectrometer

2015

Physics letters / B 744, 137 - 141 (2015). doi:10.1016/j.physletb.2015.03.047

Nuclear reactionNuclear and High Energy PhysicsISOBAR SEPARATIONPROJECTILESpatial isomer separationMass spectrometry530Ion211Po ionsPo-211 ionsCRYOGENIC STOPPING CELLPhysics::Atomic and Molecular ClustersIsomeric ratioFACILITYddc:530Physics::Chemical PhysicsSpectroscopyNuclear ExperimentFRAGMENTSPhysicsExcitation energyta114Multiple-reflection time-of-flight mass spectrometerPERFORMANCEIsotope separation in flightlcsh:QC1-999IsomerFRS-ESRTime of flightSTATESEXOTIC NUCLEIMass spectrumIsomeric beamAtomic physicsGround stateSYSTEMExcitationlcsh:Physics
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Search for magnetic monopoles with the MoEDAL forward trapping detector in 2.11 fb −1 of 13 TeV proton–proton collisions at the LHC

2018

We update our previous search for trapped magnetic monopoles in LHC Run 2 using nearly six times more integrated luminosity and including additional models for the interpretation of the data. The MoEDAL forward trapping detector, comprising 222 kg of aluminium samples, was exposed to 2.11 fb−1 of 13 TeV proton–proton collisions near the LHCb interaction point and analysed by searching for induced persistent currents after passage through a superconducting magnetometer. Magnetic charges equal to the Dirac charge or above are excluded in all samples. The results are interpreted in Drell–Yan production models for monopoles with spins 0, 1/2 and 1: in addition to standard point-like couplings, …

Particle physicsNuclear and High Energy PhysicsProtonDirac (software)magnetic monopoleMagnetic monopoleFOS: Physical sciencesddc:500.2114 Physical sciences01 natural sciences7. Clean energyHigh Energy Physics - ExperimentHigh Energy Physics - Experiment (hep-ex)0202 Atomic Molecular Nuclear Particle And Plasma PhysicsHigh Energy Physics - Phenomenology (hep-ph)STOPPING-POWER0103 physical sciencesFIELD010306 general physicsParticle Physics - PhenomenologyPhysicsLuminosity (scattering theory)Large Hadron ColliderInteraction point010308 nuclear & particles physicshep-exDrell–Yan processCharge (physics)hep-phNuclear & Particles Physicslcsh:QC1-999High Energy Physics - Phenomenologylcsh:PhysicsParticle Physics - Experiment
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Potentially inappropriate prescribing in institutionalised older patients in Spain: the STOPP-START criteria compared with the Beers criteria

2011

Objective: The aims of this study were to identify potentially inappropriate prescribing using the Beers and STOPP criteria. The START criteria were applied to detect prescription omission in the geriatric population. We compared the utility of these criteria in institutionalised older people. Methods: Descriptive study reviewing the medication and clinical records of 81 residents (aged 65 years and more) by pharmacists in a nursing home in the Lleida region (Spain). Results: The mean patients´ age was 84 (SD=8) years, with an average of 5 drugs per resident (total prescriptions: 416 medicines). The Beers criteria identified potentially inappropriate medication use in 25% of patients and 48…

Pediatricsmedicine.medical_specialtymesh:Inappropriate Prescribingbusiness.industrySTOPP START CriteriaStopp criteriaBeers CriteriaInappropriate Prescribingmesh:Agedmesh:SpainNursing HomesOlder patientsSpainGeriatric populationIntervention (counseling)Family medicinemesh:Nursing HomesMedicineMedical prescriptionNursing homesbusinessOriginal ResearchAgedPharmacy Practice (Internet)
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