0000000000273722

AUTHOR

A. Shrivastava

showing 3 related works from this author

First application of calorimetric low-temperature detectors in accelerator mass spectrometry

2004

Abstract For the first time, calorimetric low-temperature detectors were applied in accelerator mass spectrometry, a well-known method for determination of very small isotope ratios with high sensitivity. The aim of the experiment was to determine with high accuracy the isotope ratio of 236U/238U for several samples of natural uranium, 236U being known as a sensitive monitor for neutron flux. Measurements were performed at the VERA tandem accelerator at Vienna, Austria. The detectors consist of sapphire absorbers and superconducting transition edge thermometers operated at T≈ 1.5 K. The relative energy resolution obtained for 17.39 MeV 238U is ΔE/E=4–9×10−3, depending on the experimental co…

PhysicsSuperconductivityNuclear physicsNuclear and High Energy PhysicsIsotopeResolution (mass spectrometry)Neutron fluxDetectorSapphireNatural uraniumInstrumentationAccelerator mass spectrometryNuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
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New gas-filled mode of the large-acceptance spectrometer VAMOS

2010

A new gas-filled operation mode of the large-acceptance spectrometer VAMOS at GANIL is reported. A beam rejection factor greater than 10(10) is obtained for the Ca-40+Sm-150 system at 196 MeV. The unprecedented transmission efficiency for the evaporation residues produced in this reaction is estimated to be around 80% for alpha x n channels and above 95% for x ny p channels. A detailed study of the performance of the gas-filled VAMOS and future developments are discussed. This new operation mode opens avenues to explore the potential of fusion reactions in various kinematics. (C) 2010 Elsevier B.V. All rights reserved.

PhysicsNuclear and High Energy PhysicsSpectrometer010308 nuclear & particles physicsGas-filled spectrometerMode (statistics)[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]7. Clean energy01 natural sciencesNuclear physicsNuclear magnetic resonanceOperation mode0103 physical sciencesBeam rejectionNuclear fusionTransmission[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]010306 general physicsInstrumentationBeam (structure)Fusion reactions
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Quasi-free scattering with 6,8He beams

2005

Abstract This paper presents the results of experimental investigations of ( p , p n ) , ( p , p α ) and ( p , p 6 He) reactions with relativistic 6 He and 8 He beams impinging on a hydrogen target. Information on the structure of extremely neutron-rich nuclei was obtained by using the unique characteristic of quasi-free scattering processes and inverse kinematics. For the first time, momentum distributions of complex clusters inside 6 He and 8 He were measured. Spectroscopic factors for valence neutrons, α - and 6 He clusters were deduced from the experimental data. They demonstrate that the filling of the p 1 2 shell is the essential feature of the 8 He structure. It is shown that the 8 H…

PhysicsNuclear and High Energy PhysicsValence (chemistry)HydrogenchemistryScatteringNuclear structureCluster (physics)chemistry.chemical_elementNeutronAtomic physicsNuclear Physics A
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