A5040972494- Nuclear physics research studies
- Radiation Therapy and Dosimetry
- Nuclear Physics and Applications
- Particle physics theoretical and experimental studies
- Astronomical and nuclear sciences
- Advanced Radiotherapy Techniques
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Quantum Chromodynamics and Particle Interactions
- Neutrino Physics Research
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Advanced NMR Techniques and Applications
- Advanced Chemical Physics Studies
- Radiopharmaceutical Chemistry and Applications
- Radioactive Decay and Measurement Techniques
- Radiation Dose and Imaging
- Glioma Diagnosis and Treatment
- Radiation Detection and Scintillator Technologies
- Solid-state spectroscopy and crystallography
- Particle Accelerators and Free-Electron Lasers
- Rare-earth and actinide compounds
- Cardiac Fibrosis and Remodeling
- Childhood Cancer Survivors' Quality of Life
- Sarcoma Diagnosis and Treatment
Mayo Clinic Hospital
2024
Mayo Clinic in Florida
2014-2023
WinnMed
2020-2023
Mayo Clinic
2012-2014
The University of Texas MD Anderson Cancer Center
2013-2014
Michigan State University
2006-2013
National Superconducting Cyclotron Laboratory
2006-2013
Joint Institute for Nuclear Astrophysics
2011
Florida State University
2008-2010
Washington University in St. Louis
2005
PurposeMultiple energy extraction (MEE) is a technology that was recently introduced by Hitachi for its spot-scanning proton treatment system, which allows multiple energies to be delivered in single synchrotron spill. The purpose of this paper investigate how much beam delivery time (BDT) can reduced with MEE compared (SEE), one per spill.Methods and MaterialsA developed model based on BDT measurements our synchrotron's performance used compute BDT. total 2694 deliveries cohort 79 patients...
Purpose To commission an open source Monte Carlo (MC) dose engine, “MCsquare” for a synchrotron‐based proton machine, integrate it into our in‐house C++‐based I/O user interface and web‐based software platform, expand its functionalities, improve calculation efficiency intensity‐modulated therapy (IMPT). Methods We commissioned MCsquare using double Gaussian beam model based on in‐air lateral profiles, integrated depth of 97 energies, measurements various spread‐out Bragg peaks (SOBPs). Then...
The beta decay of 33Mg (N=21) presented in this Letter reveals intruder configurations both the parent and daughter nucleus. lowest excited states N=20 nucleus, 33Al, are found to have nearly 2p-2h configuration, thus extending "island inversion" beyond Mg. allowed direct beta-decay branch 5/2{+} ground state nucleus 33Al implies positive parity for 33Mg, contrary an earlier suggestion negative from a g-factor measurement. An admixture 1p-1h 3p-3h is proposed explain all experimental observables.
The isomeric and $\ensuremath{\beta}$-decay properties of neutron-rich $^{53\ensuremath{-}57}\mathrm{Sc}$ $^{53,54}\mathrm{Ca}$ nuclei near neutron number $N=32$ are reported, the low-energy level schemes $^{53,54,56}\mathrm{Sc}$ $^{53\ensuremath{-}57}\mathrm{Ti}$ presented. structures ${}_{21}\mathrm{Sc}$ isotopes discussed in terms coupling valence $1{f}_{7/2}$ proton to states corresponding ${}_{20}\mathrm{Ca}$ cores. Implications with respect robustness subshell closure discussed, as...
Beta-delayed proton emission from nuclides in the neighborhood of 100Sn was studied at National Superconducting Cyclotron Laboratory. The nuclei were produced by fragmentation a 120 MeV/nucleon 112Sn primary beam on Be target. Beam purification provided A1900 Fragment Separator and Radio Frequency Separator. fragments interest identified their decay with NSCL Beta Counting System (BCS) conjunction Segmented Germanium Array (SeGA). 96Cd, 98Ing, 98Inm 99In as beta-delayed emitters, branching...
To develop an online graphic processing unit (GPU)-accelerated Monte Carlo-based adaptive radiation therapy (ART) workflow for pencil beam scanning (PBS) proton to address interfraction anatomical changes in patients treated with PBS.A four-step was developed using our in-house GPU-accelerated treatment planning system implement ART PBS. The first step conducts diffeomorphic demon-based deformable image registration (DIR) propagate contours on the initial CT (pCT) verification (vCT) form a...
Abstract Background Bolus materials have been used for decades in radiotherapy. Most frequently, these are utilized to bring dose closer the skin surface cover superficial targets optimally. While cavity filling, such as nasal cavities, is desirable, traditional commercial bolus lacking, requiring other solutions. Recently, investigators worked on utilizing 3D printing technology, including commercially available solutions, which can overcome some challenges with bolus. Purpose To utilize...
The low energy level structure of $N=20$ $^{32}\mathrm{Mg}$ obtained via \ensuremath{\beta}-delayed \ensuremath{\gamma} spectroscopy is reported. found to be completely dominated by intruders. An inversion between the 1p-1h and 3p-3h states observed for negative parity states, similar 0p-0h 2p-2h positive in these $N~20$ nuclei. intruder excited both parity, are reasonably explained Monte Carlo shell model calculations, which suggest a shrinking gap with decreasing $Z$.
recommend that the pET be used to monitor patients receiving oral enzyme replacement therapy, which is a major drawback for clinical application of pET.On other hand, antigenic substrate in seems equally stable relation elastase 1.Only concentrations determined with stools stored at 4 °C 48 h were significantly higher than directly measured concentrations.Although both and mET assessments performed on stool samples continuously closed cups, partial evaporation consecutive concentration...
The presence of isomeric levels with half-lives in the microsecond range has been identified $^{125,126,127,128}\mathrm{Cd}$. Neutron-rich Cd isotopes were produced from fragmentation a 120 MeV/nucleon $^{136}\mathrm{Xe}$ beam and uniquely through their time-of-flight, energy loss, total kinetic energy. \ensuremath{\gamma} rays these measured an array Ge detectors that gated for 15 \ensuremath{\mu}s by particle implantation trigger stack Si detectors. observed decay $^{126,128}\mathrm{Cd}$...
The beta decay of the exotic 30Ne (N=20) is reported. For first time, low-energy level structure N=19, 30Na (Tz = 4), obtained from beta-delayed gamma spectroscopy using fragment-beta-gamma-gamma coincidences. clearly displays "inversion", i.e., intruder states with mainly 2p2h configurations displacing normal to higher excitation energies. good agreement in energies and weak electromagnetic patterns Monte Carlo Shell Model calculations SDPF-M interaction sdpf valence space illustrates small...
\ensuremath{\beta}-decay properties of neutron-rich Ca isotopes have been obtained. Half-life values were determined for the first time $^{54}\mathrm{Ca}$ ($86\ifmmode\pm\else\textpm\fi{}7$ ms), $^{55}\mathrm{Ca}$ ($22\ifmmode\pm\else\textpm\fi{}2$ and $^{56}\mathrm{Ca}$ ($11\ifmmode\pm\else\textpm\fi{}2$ ms). The half-life $230\ifmmode\pm\else\textpm\fi{}60$ ms deduced $^{53}\mathrm{Ca}$ is significantly longer than reported previously, where decay chain $^{53}\mathrm{K}$...
The nuclear magnetic moment of the ground state (57)Cu(Iota(pi) = 3/2(-), T(1/2) 196.3 ms) has been measured to be /mu((57)Cu)/ (2.00 +/- 0.05)mu(N) using beta-NMR technique. Together with known mirror partner (57)Ni, spin expectation value was extracted as <Sigmasigma(z)> -0.078 0.13. This is heaviest isospin T 1/2 pair above (40)Ca region for which both moments have determined. discrepancy between present results and shell-model calculations in full f p shell giving mu((57)Cu)...
For treatment of the entire cranium using passive scattering proton therapy (PSPT) compensators are often employed in order to reduce lens and cochlear exposure. We sought assess advantages consequences utilizing for whole brain as a component craniospinal radiation (CSI) with PSPT. Moreover, we evaluated potential benefits spot scanning beam delivery comparison Planning computed tomography scans 50 consecutive CSI patients were utilized generate plans without Lucite (PSW PSWO respectively)....
A half-life of 2.2 \ifmmode\pm\else\textpm\fi{} 0.2 s has been deduced for the ground-state $\ensuremath{\beta}$ decay $^{84}\mathrm{Mo}$, more than $1\ensuremath{\sigma}$ shorter previously adopted value. $^{84}\mathrm{Mo}$ is an even-even $N=Z$ nucleus lying on proton dripline, created during explosive hydrogen burning in type I x-ray bursts rapid capture ($\mathit{rp}$) process. The effect measured $\mathit{rp}$-process reaction flow explored. Implications theoretical treatments nuclear...
The beta-decay properties of the N=Z nuclei 96Cd, 98In, and 100Sn have been studied. These were produced at National Superconducting Cyclotron Laboratory by fragmenting a 120 MeV/nucleon 112Sn primary beam on Be target. resulting radioactive was filtered in A1900 newly commissioned Radio Frequency Fragment Separator to achieve purity level suitable for decay studies. observed production cross sections these are lower than predicted factors 10-30. half-life which last experimentally unknown...
The nuclear magnetic moment of the ground state $^{55}$Ni ($I^π=3/2^{-}, T_{1/2}=204$ ms) has been deduced to be $|μ$^{55}Ni)$|=(0.976 \pm 0.026)$ $μ_N$ using $β$-NMR technique. Results a shell model calculation in full \textit{fp} space with GXPF1 interaction reproduce experimental value. Together known mirror partner $^{55}$Co, isoscalar spin expectation value was extracted as $=0.91 0.07$. $$ shows similar trend that established \textit{sd} shell. present theoretical interpretations both...
The energy-level structure of $^{22}\mathrm{O}$ with the recently identified $N=14$ subshell closure was investigated by $\ensuremath{\beta}$ decay $^{22}\mathrm{N}$ for first time. A $\ensuremath{\beta}$-delayed-neutron, time-of-flight measurement revealed six new neutron transitions attributed to $^{22}\mathrm{N}$. One- and two-$\ensuremath{\beta}$-delayed $^{22}\mathrm{N}$, emission probabilities 33(3)% 12(3)%, respectively, were observed correspond four negative-parity states in...
$\ensuremath{\beta}$ decay of the $^{61}\mathrm{Cr}{}_{37}$ ground state has been studied. A new half-life $233\ifmmode\pm\else\textpm\fi{}11$ ms deduced, and seven delayed $\ensuremath{\gamma}$ rays have assigned to daughter $^{61}\mathrm{Mn}{}_{36}$. The low-energy level structure $^{61}\mathrm{Mn}{}_{36}$ is similar that less neutron-rich $^{57,59}\mathrm{Mn}$ nuclei. odd-${A}_{25}$Mn isotopes follow systematic trend in yrast states even-even, $Z+1$ ${}_{26}$Fe isotopes, not...
First experimental evidence for a high-spin isomer (25/2+) in 97Cd, waiting point the astrophysical rapid proton capture process, is presented. The data were obtained β-decay studies at NSCL using new RF Fragment Separator system and detecting β-delayed protons γ rays. Decays from ground isomeric states disentangled, emission branches determined first time. We find half-lives of 1.10(8) s 3.8(2) s, 12(2)% 25(4)% deduced states, respectively. With these results, nuclear needed to determine an...