D. Radford - Academia.edu (original) (raw)

Papers by D. Radford

We are currently investigating the feasibility of using the 25 MV Tandem from the HRIBF for Accel... more We are currently investigating the feasibility of using the 25 MV Tandem from the HRIBF for Accelerator Mass Spectrometry (AMS). The HRIBF Tandem accelerator is the highest operating voltage electrostatic accelerator in the world. There are a number of isotopes of interest for AMS where the high energies achieved for ions could represent a very important advantage for their detection.

Gamma-ray transitions in the ground-state proton emitter '13Cs have been identified using the... more Gamma-ray transitions in the ground-state proton emitter '13Cs have been identified using the reaction 58Ni(58Ni,p2n) at a beam energy of 230 MeV and the recoil decay tagging technique. The first experiment was done using the Recoil Mass Spectrometer at the Holifield Radioactive Ion Beam Facility where y-ray transitions were detected with 6 Clover and 5 Duet Ge detectors. A follow-up experiment using the GAMMASPHERE-FMA combination at Argonne National Laboratory was performed. Ninety-six Ge and 4 LEPs detectors were used to record recoil-yy coincidences. Both experiments employed standard recoil mass separation techniques which resulted in the implantation of A=113 reaction products into a double-sided silicon-strip detector. By gating on the energy of the emitted proton and decay time, the correlation between y rays and the implanted lI3Cs could be observed. Initial analysis and comparison with energy level systematics of the Cs isotopes reveal a decay sequence based on the h y...

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016

The GRETINA array makes use of the concepts of signal decomposition , which fits the observed wav... more The GRETINA array makes use of the concepts of signal decomposition , which fits the observed waveform from each crystal segment with a linear combination of pre-calculated basis signals to localize the interaction of gamma-rays within the detector volume, and then γ-ray tracking to reconstruct the γ-ray scattering sequence. The capability of reconstructing the position of the interaction with resolution at the level of a few millimeters is a fundamental requirement for reliable tracking and is important to understand and quantify the limiting factors of position resolution. Improvements in signal decomposition can be realized by better modeling the crystals. Specifically, we need a better understanding of drift velocity anisotropy, which causes considerable differences in pulse shape rise time depending on the position of the spatial charge carrier creation. In this presentation we will discuss the sensitivity of the predicted pulse shapes when varying hole mobility parameters and ...

Fission and Properties of Neutron-Rich Nuclei, 2013

Two generalized transfer reaction techniques have been used to exploit these beams in regions of ... more Two generalized transfer reaction techniques have been used to exploit these beams in regions of the nuclear chart around N = 50 and N = 82. The first employs large silicon detector arrays to measure protons emitted from the (d,p) reaction in inverse kinematics [2 6]. The second uses HYBALL to detect the charged particles emitted from ( 9 Be, 8 Be), and ( 13 C, 12 C) reactions with gamma rays measured in coincidence in CLARION [6 7].

Physical Review C, 2002

... Louis, Missouri 63130 MP Carpenter, RVF Janssens, and D. Seweryniak Physics Division, Argonne... more ... Louis, Missouri 63130 MP Carpenter, RVF Janssens, and D. Seweryniak Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 E. Padilla Instituto de Ciencias Nucleares, UNAM ... PJ Nolan, NJ OBrien, CM Parry, SL Shepherd, R. Wadsworth, and R. Wyss, J. Phys ...

Physical Review C, 2001

The technique of isomer decay tagging (IDT) has been recently implemented at Oak Ridge National L... more The technique of isomer decay tagging (IDT) has been recently implemented at Oak Ridge National Laboratory to identify strongly deformed bands above a short-lived isomer in 80Y. The IDT method provides very clean reaction channel selection of prompt in-beam decays by correlating these events with delayed events detected at the focal plane of a recoil separator. Using this method, coincident

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2007

Cornell University - arXiv, Sep 21, 2022

arXiv: Nuclear Experiment, Sep 3, 2011

APS Division of Nuclear Physics Meeting Abstracts, 2019

APS April Meeting Abstracts, Apr 1, 1998

ABSTRACT

C.E. Svensson, A.O. Macchiavelli, A. Juodagalvis, A. Poves, I. Ragnarsson, S. Åberg, D.E. Appelbe... more C.E. Svensson, A.O. Macchiavelli, A. Juodagalvis, A. Poves, I. Ragnarsson, S. Åberg, D.E. Appelbe, R.A.E. Austin, C. Baktash, G.C. Ball, M.P. Carpenter, E. Caurier, R.M. Clark, M. Cromaz, M.A. Deleplanque, R.M. Diamond, P. Fallon, M. Furlotti, A. Galindo-Uribarri, R.V.F. Janssens, G.J. Lane, I.Y. Lee, M. Lipoglavsek, F. Nowacki, S.D. Paul, D.C. Radford, D.G. Sarantites, D. Seweryniak, F.S. Stephens, V. Tomov, K. Vetter, D. Ward, and C.H. Yu

IEEE Transactions on Nuclear Science, 2021

We are currently investigating the feasibility of using the 25 MV Tandem from the HRIBF for Accel... more We are currently investigating the feasibility of using the 25 MV Tandem from the HRIBF for Accelerator Mass Spectrometry (AMS). The HRIBF Tandem accelerator is the highest operating voltage electrostatic accelerator in the world. There are a number of isotopes of interest for AMS where the high energies achieved for ions could represent a very important advantage for their detection.

Gamma-ray transitions in the ground-state proton emitter '13Cs have been identified using the... more Gamma-ray transitions in the ground-state proton emitter '13Cs have been identified using the reaction 58Ni(58Ni,p2n) at a beam energy of 230 MeV and the recoil decay tagging technique. The first experiment was done using the Recoil Mass Spectrometer at the Holifield Radioactive Ion Beam Facility where y-ray transitions were detected with 6 Clover and 5 Duet Ge detectors. A follow-up experiment using the GAMMASPHERE-FMA combination at Argonne National Laboratory was performed. Ninety-six Ge and 4 LEPs detectors were used to record recoil-yy coincidences. Both experiments employed standard recoil mass separation techniques which resulted in the implantation of A=113 reaction products into a double-sided silicon-strip detector. By gating on the energy of the emitted proton and decay time, the correlation between y rays and the implanted lI3Cs could be observed. Initial analysis and comparison with energy level systematics of the Cs isotopes reveal a decay sequence based on the h y...

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2016

The GRETINA array makes use of the concepts of signal decomposition , which fits the observed wav... more The GRETINA array makes use of the concepts of signal decomposition , which fits the observed waveform from each crystal segment with a linear combination of pre-calculated basis signals to localize the interaction of gamma-rays within the detector volume, and then γ-ray tracking to reconstruct the γ-ray scattering sequence. The capability of reconstructing the position of the interaction with resolution at the level of a few millimeters is a fundamental requirement for reliable tracking and is important to understand and quantify the limiting factors of position resolution. Improvements in signal decomposition can be realized by better modeling the crystals. Specifically, we need a better understanding of drift velocity anisotropy, which causes considerable differences in pulse shape rise time depending on the position of the spatial charge carrier creation. In this presentation we will discuss the sensitivity of the predicted pulse shapes when varying hole mobility parameters and ...

Fission and Properties of Neutron-Rich Nuclei, 2013

Two generalized transfer reaction techniques have been used to exploit these beams in regions of ... more Two generalized transfer reaction techniques have been used to exploit these beams in regions of the nuclear chart around N = 50 and N = 82. The first employs large silicon detector arrays to measure protons emitted from the (d,p) reaction in inverse kinematics [2 6]. The second uses HYBALL to detect the charged particles emitted from ( 9 Be, 8 Be), and ( 13 C, 12 C) reactions with gamma rays measured in coincidence in CLARION [6 7].

Physical Review C, 2002

... Louis, Missouri 63130 MP Carpenter, RVF Janssens, and D. Seweryniak Physics Division, Argonne... more ... Louis, Missouri 63130 MP Carpenter, RVF Janssens, and D. Seweryniak Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 E. Padilla Instituto de Ciencias Nucleares, UNAM ... PJ Nolan, NJ OBrien, CM Parry, SL Shepherd, R. Wadsworth, and R. Wyss, J. Phys ...

Physical Review C, 2001

The technique of isomer decay tagging (IDT) has been recently implemented at Oak Ridge National L... more The technique of isomer decay tagging (IDT) has been recently implemented at Oak Ridge National Laboratory to identify strongly deformed bands above a short-lived isomer in 80Y. The IDT method provides very clean reaction channel selection of prompt in-beam decays by correlating these events with delayed events detected at the focal plane of a recoil separator. Using this method, coincident

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2007

Cornell University - arXiv, Sep 21, 2022

arXiv: Nuclear Experiment, Sep 3, 2011

APS Division of Nuclear Physics Meeting Abstracts, 2019

APS April Meeting Abstracts, Apr 1, 1998

ABSTRACT

C.E. Svensson, A.O. Macchiavelli, A. Juodagalvis, A. Poves, I. Ragnarsson, S. Åberg, D.E. Appelbe... more C.E. Svensson, A.O. Macchiavelli, A. Juodagalvis, A. Poves, I. Ragnarsson, S. Åberg, D.E. Appelbe, R.A.E. Austin, C. Baktash, G.C. Ball, M.P. Carpenter, E. Caurier, R.M. Clark, M. Cromaz, M.A. Deleplanque, R.M. Diamond, P. Fallon, M. Furlotti, A. Galindo-Uribarri, R.V.F. Janssens, G.J. Lane, I.Y. Lee, M. Lipoglavsek, F. Nowacki, S.D. Paul, D.C. Radford, D.G. Sarantites, D. Seweryniak, F.S. Stephens, V. Tomov, K. Vetter, D. Ward, and C.H. Yu

IEEE Transactions on Nuclear Science, 2021