21 Result(s)
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Article
D.J. Morrissey
Nuclear Physics, Heavy Ions, Hadrons
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Article
Implications of the target residue mass and charge distributions in the interaction of 8.0 GeV20Ne with181Ta
Target residue mass and charge distributions have been measured radioanalytically for the reaction of 8.0 GeV20Ne ions with Ta. These distributions are very similar to those distributions observed in the reaction...
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Article
Large contribution of deep inelastic processes to reactions of40Ar and48Ca with238U
Differential recoil range distributions have been measured for heavy-reaction products ranging from Te(Z=52) to quasielastic transfer products near the charge and mass of the targets for the reactions of 276 MeV4...
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Angular momentum, statistical equilibrium and sequential fission in very asymmetric systems
The in-and out-of-plane angular distributions for fission fragments in coincidence with projectile-like products from the reaction of 252 MeV20Ne with197Au and238U have been measured. The results are compared to ...
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Spin-oriented projectile fragments: The first application tog-factor measurements
Ejectile nuclei in the fragmentation of intermediate-energy heavy-ion projectiles were found to be largely spin polarized. The observed polarization as a function of the outgoing momentum was nicely explained ...
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Target isotope effect in high energy photon production atE/A=10 MeV
A comparison has been made between the production of high energy (E γ≧30 MeV)γ rays from the bombardment of124Sn and112Sn targets withE/A= 10 MeV12C ions. The results are well explained by then-p bremsstrahlung m...
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Article
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...
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Article
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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Article
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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Article
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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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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Article
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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Article
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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Article
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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Article
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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Article
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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Article
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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Article
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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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...
