25 Result(s)
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Article
D.J. Morrissey
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Fission fragment yields from heavy-ion-induced reactions measured with a fragment separator
The systematic study of fission fragment yields under different initial conditions has provided valuable experimental data for benchmarking models of fission product yields. Nuclear reactions using inverse kin...
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Commissioning of the collinear laser spectroscopy facility BECOLA at NSCL/MSU
The BEam COoler and LAser spectroscopy (BECOLA) facility at National Superconducting Cyclotron Laboratory at Michigan State University has been commissioned online to determine charge radii and electromagnetic...
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Technical developments for an upgrade of the LEBIT Penning trap mass spectrometry facility for rare isotopes
The LEBIT (Low Energy Beam and Ion Trap) facility is the only Penning trap mass spectrometry (PTMS) facility to utilize rare isotopes produced via fast-beam fragmentation. This technique allows access to pract...
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High-precision Penning trap mass measurements of ‘difficult’ elements produced via projectile fragmentation with LEBIT
Rare isotope beams of many elements can be difficult or impossible to obtain at ISOL facilities due to their high melting points or chemical reactivity, but they are easily produced by projectile fragmentation...
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Precision Penning trap mass measurements of rare isotopes produced by projectile fragmentation
The low-energy beam and ion trap facility LEBIT at NSCL/MSU is at present the only facility where precision experiments are performed with stopped rare isotope beams produced by fast-beam fragmentation. LEBIT ...
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Extraction of thermalized projectile fragments from gas
The NSCL gas cell and quadrupole ion-guide system has been used to study the thermalization of fast nuclear reaction products in a buffer gas. The fraction of radioactive ions that can be extracted from the ga...
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Efficient and fast thermalization of Rare Isotope Beam from projectile fragmentation
Gas stop** is the method of choice for converting rare isotope beams obtained via projectile fragmentation and in-flight separation into low-energy beams. Current gas stopper systems for high-energy beams ar...
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Penning trap mass measurements of rare isotopes produced by projectile fragmentation with LEBIT at NSCL
The Low-Energy Beam and Ion Trap facility LEBIT at the NSCL at MSU has demonstrated that rare isotopes produced by fast-beam fragmentation can be slowed down and prepared for precision experiments with low-ene...
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Discovery of 40Mg and 42Al suggests neutron drip-line slant towards heavier isotopes
The limit of how many neutrons can be bound by a given number of protons — called the neutron drip line — is of fundamental importance in nuclear physics. It is unknown for all but the lightest elements, becau...
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Space charge effects on stopped projectile fragment drift in gas
The results from a particle-in-cell code developed to describe the drifting of ions in an ionized buffer gas are described. The rate of ionization was found to have a dramatic effect on the collection efficien...
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The LEBIT facility at MSU
The low-energy beam and ion trap facility LEBIT at the NSCL at MSU has demonstrated that rare isotopes produced by fast-beam fragmentation can be slowed down and prepared such that precision experiments with l...
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Beam purification techniques for low energy rare isotope beams from a gas cell
A linear gas stop** cell has been implemented at the NSCL as part of the Low Energy Beam and Ion Trap (LEBIT) facility. The gas stop** cell is used to convert relativistic ions into low energy ions suitabl...
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The cyclotron gas stopper project at the NSCL
Gas stop** is becoming the method of choice for converting beams of rare isotopes obtained via projectile fragmentation and in-flight separation into low-energy beams. These beams allow ISOL-type experiments...
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Precision experiments with rare isotopes with LEBIT at MSU
The Low-Energy Beam and Ion Trap facility LEBIT at the NSCL is in the final phase of commissioning. Gas stop** of fast fragment beams and modern ion manipulation techniques are used to provide beams for high...
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Anomalous behaviour of matter radii of proton-rich Ga, Ge, As, Se and Br nuclei
Proton-rich isotopes of Ga, Ge, As, Se and Br had their total reaction cross-sections (σR) measured. Root-mean-squared matter radii were determined from Glauber model calculations, which reproduced the experiment...
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Production of low- and high-energy radioactive-ion beams by fragmentation
The physics opportunities made possible by beams of rare isotopes are among the richest available in nuclear science. The rare-isotope accelerator (RIA) now under development is an innovative accelerator that ...
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Pulsed magnetic field method for measuring polarization of radioactive beams
A new method has been developed for measuring the magnitude of nuclear spin polarization of a secondary, radioactive beam by making a pulsed magnetic field measurement that does not require advance knowledge o...
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Inelastic proton scattering on Neutron-Rich sulphur isotopes
The proton scattering on unstable38S nuclei has been measured in inverse kinematics by using a38S secondary beam at 39 MeV/nucleon. The first 2+ state is seen at 1.2 MeV excitation energy and its angular distribu...
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Beta-delayed proton emission around N=50 and the rp-process
Detailed information on the decay modes of very proton-rich heavy nuclei is a prerequisite for p-process nucleosynthesis models. We have therefore measuredβ-delayed protons andγ-rays from mass-separated sources o...
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Beta-delayed proton emission around N=50 and the rp-process
Detailed information on the decay modes of very proton-rich heavy nuclei is a prerequisite for p-process nucleosynthesis models. We have therefore measured β-delayed protons and γ-rays from mass-separated sources...
