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NSR database version of April 11, 2024.

Search: Author = R.Orford

Found 19 matches.

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2023GA11      Phys.Rev.Lett. 130, 192502 (2023)

A.T.Gallant, N.D.Scielzo, G.Savard, J.A.Clark, M.Brodeur, F.Buchinger, D.P.Burdette, M.T.Burkey, S.Caldwell, J.E.Crawford, A.Czeszumska, C.M.Deibel, J.Greene, D.Heslop, T.Y.Hirsh, A.F.Levand, B.Longfellow, G.E.Morgan, P.Mueller, R.Orford, S.Padgett, N.Paul, A.Perez Galvan, A.Reimer, R.Segel, K.S.Sharma, K.Siegl, L.Varriano, B.J.Zabransky

Angular Correlations in the β Decay of 8B: First Tensor-Current Limits from a Mirror-Nucleus Pair

RADIOACTIVITY 8B(β+); measured decay products, Eβ, Iβ; deduced the α-β-ν angular correlation in the Gamow-Teller β+ decay. The Beta-decay Paul Trap.

doi: 10.1103/PhysRevLett.130.192502
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Data from this article have been entered in the XUNDL database. For more information, click here.


2023HO14      Phys.Rev.Lett. 131, 262701 (2023)

D.E.M.Hoff, K.Kolos, G.W.Misch, D.Ray, B.Liu, A.A.Valverde, M.Brodeur, D.P.Burdette, N.Callahan, J.A.Clark, A.T.Gallant, F.G.Kondev, G.E.Morgan, M.R.Mumpower, R.Orford, W.S.Porter, F.Rivero, G.Savard, N.D.Scielzo, K.S.Sharma, K.Sieja, T.M.Sprouse, L.Varriano

Direct Mass Measurements to Inform the Behavior of 128mSb in Nucleosynthetic Environments

ATOMIC MASSES 128,128mSb; measured cyclotron frequencies; deduced mass excesses, isomer excitation energy. Comparison with AME2020, NUBASE2020, state-of-the-art shell model calculations using the GCN5082 interaction. The phase-imaging ion-cyclotron resonance (PI-ICR) technique with the Canadian Penning Trap (CPT) mass spectrometer at the Californium Rare Isotope Breeder Upgrade facility.

doi: 10.1103/PhysRevLett.131.262701
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022BU16      Phys.Rev.Lett. 128, 202502 (2022)

M.T.Burkey, G.Savard, A.T.Gallant, N.D.Scielzo, J.A.Clark, T.Y.Hirsh, L.Varriano, G.H.Sargsyan, K.D.Launey, M.Brodeur, D.P.Burdette, E.Heckmaier, K.Joerres, J.W.Klimes, K.Kolos, A.Laminack, K.G.Leach, A.F.Levand, B.Longfellow, B.Maass, S.T.Marley, G.E.Morgan, P.Mueller, R.Orford, S.W.Padgett, A.Perez Galvan, J.R.Pierce, D.Ray, R.Segel, K.Siegl, K.S.Sharma, B.S.Wang

Improved Limit on Tensor Currents in the Weak Interaction from 8Li β Decay

RADIOACTIVITY 8Li(β-); measured decay products, Eβ, Iβ; deduced tensor currents in the low-energy regime by examining the β-ν correlation of trapped 8Li ions with the Beta-decay Paul Trap. Comparison with the standard model prediction.

doi: 10.1103/PhysRevLett.128.202502
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Data from this article have been entered in the XUNDL database. For more information, click here.


2022GA27      Phys.Rev. C 106, 045503 (2022)

N.D.Gamage, R.Sandler, F.Buchinger, J.A.Clark, D.Ray, R.Orford, W.S.Porter, M.Redshaw, G.Savard, K.S.Sharma, A.A.Valverde

Precise Q-value measurements of 112, 113Ag and 115Cd with the Canadian Penning trap for evaluation of potential ultralow Q-value β decays

RADIOACTIVITY 112,113Ag, 115Cd(β-); measured cyclotron frequency ratios of singly charged parent and daughter ions; deduced Q values of g.s to g.s decay, log ft, partial T1/2. On the basis of measured values and existing level schemes evaluated ultralow Q-values for potential decay branches to the excited states. Comparison to AME2020 evaluation. Canadian Penning trap mass spectrometer coupled to the californium rare isotope breeder upgrade (CARIBU) facility at ANL. Comparison to AME2020 evaluation.

ATOMIC MASSES 112,113Ag, 115Cd; measured cyclotron frequency; deduced mass excesses. Comparison to AME2020 evaluation.

doi: 10.1103/PhysRevC.106.045503
Citations: PlumX Metrics


2022OR02      Phys.Rev. C 105, L052802 (2022)

R.Orford, N.Vassh, J.A.Clark, G.C.McLaughlin, M.R.Mumpower, D.Ray, G.Savard, R.Surman, F.Buchinger, D.P.Burdette, M.T.Burkey, D.A.Gorelov, J.W.Klimes, W.S.Porter, K.S.Sharma, A.A.Valverde, L.Varriano, X.L.Yan

Searching for the origin of the rare-earth peak with precision mass measurements across Ce-Eu isotopic chains

ATOMIC MASSES 152,153,154Ce, 152,153,154,156,157Pr, 157Nd, 161Pm, 163,165Eu; measured cyclotron frequency; deduced mass excess, solar abundances of rare-earth elements. Comparison to AME2016 and AME2020 evaluations, previous experimental data and calculations using Markov chain Monte Carlo (MCMC) technique. Canadian Penning Trap (CPT) with low-energy ion beams from the Californium Rare Isotope Breeder Upgrade(CARIBU) facility at Argonne National Laboratory. Systematics of CPT mass-measurements for Ce, Pr, Nd, Pm, Sm, Eu (Z=58-63).

doi: 10.1103/PhysRevC.105.L052802
Citations: PlumX Metrics


2021KO09      Nucl.Instrum.Methods Phys.Res. A1000, 165240 (2021)

K.Kolos, A.M.Hennessy, N.D.Scielzo, V.E.Iacob, J.C.Hardy, M.A.Stoyer, A.P.Tonchev, W.-J.Ong, M.T.Burkey, B.Champine, J.A.Clark, P.Copp, A.Gallant, E.B.Norman, R.Orford, H.I.Park, J.Rohrer, D.Santiago-Gonzalez, G.Savard, A.J.Shaka, B.S.Wang, S.Zhu

New approach to precisely measure γ-ray intensities for long-lived fission products, with results for the decay of 95Zr

RADIOACTIVITY 95Zr, 95Nb, 95Sr, 95Y(β-); measured decay products, Eγ, Iγ, Eβ, Iβ, β-γ-coin.; deduced γ-ray energies and intensities, β-branching ratios. Comparison with a Monte Carlo decay code simulations. CARIBU facility, the reactor facility at TAMU.

doi: 10.1016/j.nima.2021.165240
Citations: PlumX Metrics


2021MI07      Phys.Rev. C 103, 024323 (2021)

A.J.Mitchell, R.Orford, G.J.Lane, C.J.Lister, P.Copp, J.A.Clark, G.Savard, J.M.Allmond, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, P.Chowdhury, D.A.Gorelov, R.V.F.Janssens, F.G.Kondev, U.Patel, D.Seweryniak, M.L.Smith, Y.Y.Zhong, S.Zhu

Ground-state and decay properties of neutron-rich 106Nb

RADIOACTIVITY 106Nb(β-)[from 252Cf(SF), CARIBU radioactive-ion-beam facility at ANL, followed by mass separation and measurement using Multi-Reflection Time-of-Flight (MR-TOF) mass separator and Canadian Penning Trap (CPT)]; measured CPT spectra, Eγ, Iγ, βγγ-coin, half-life of 106Nb decay using five HPGe clover detectors, and a plastic scintillator at the X-Array and SATURN decay-spectroscopy station. 106Mo; deduced levels, J, π, apparent β feedings, range of logft values, configurations. 106Nb; discussed spin, parity and configurations of the ground state. Comparison with earlier experimental results.

ATOMIC MASSES 106Nb; measured cyclotron frequency using the Phase-Imaging Ion-Cyclotron-Resonance (PI-ICR) technique, CPT spectra; deduced mass excess. Comparison with previous measurement, and with AME 2016 evaluation.

doi: 10.1103/PhysRevC.103.024323
Citations: PlumX Metrics

Data from this article have been entered in the XUNDL database. For more information, click here.


2020CZ01      Phys.Rev. C 101, 024312 (2020)

A.Czeszumska, N.D.Scielzo, S.A.Caldwell, J.A.Clark, G.Savard, B.S.Wang, A.Aprahamian, M.T.Burkey, C.J.Chiara, J.Harker, A.F.Levand, S.T.Marley, G.Morgan, J.M.Munson, E.B.Norman, A.Nystrom, R.Orford, S.W.Padgett, A.Perez Galvan, K.S.Sharma, K.Siegl, S.Y.Strauss

β-delayed neutron emission studies of 137,138I and 144,145Cs performed with trapped ions

RADIOACTIVITY 137,138I, 144,145Cs(β-), (β-n)[252Cf(SF) CARIBU facility and mass scans of radioactive beams with the Canadian Penning Trap (CPT) mass spectrometer at Argonne National Laboratory]; measured recoil ions, Eβ, Eγ, (recoil ions)β- and βγ-coin using Beta-decay Paul Trap with two plastic-scintillator ΔE-E telescopes, two MCP detectors, and two HPGe detectors; deduced beta-delayed neutron spectra, beta-delayed neutron-emission probabilities (%β-n or Pn). Comparison with previous experimental results.

doi: 10.1103/PhysRevC.101.024312
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14632. Data from this article have been entered in the XUNDL database. For more information, click here.


2020HA13      Phys.Rev. C 101, 044301 (2020)

D.J.Hartley, F.G.Kondev, G.Savard, J.A.Clark, A.D.Ayangeakaa, S.Bottoni, M.P.Carpenter, P.Copp, K.Hicks, C.R.Hoffman, R.V.F.Janssens, T.Lauritsen, R.Orford, J.Sethi, S.Zhu

High-K, two-quasiparticle states in 160Gd

RADIOACTIVITY 160,160mEu(β-)[from 252Cf(SF), isobarically separated A=160 nuclei using the CARIBU source at Argonne National Laboratory]; measured β-, Eγ, Iγ, βγ- and βγγ-coin using four Ge clover detectors and four plastic scintillators. 160Gd; deduced levels, J, π, Kπ, bands, Nilsson configurations, total conversion coefficients and multipolarities of the 98.8- and 102.7-keV transitions, Iβ and logft. Comparison with previous experimental results, and with multiquasiparticle calculations using Woods-Saxon potential, and Lipkin-Nogami prescription for pairing.

doi: 10.1103/PhysRevC.101.044301
Citations: PlumX Metrics

Data from this article have been entered in the XUNDL database. For more information, click here.


2020OR02      Nucl.Instrum.Methods Phys.Res. B463, 491 (2020)

R.Orford, J.A.Clark, G.Savard, A.Aprahamian, F.Buchinger, M.T.Burkey, D.A.Gorelov, J.W.Klimes, G.E.Morgan, A.Nystrom, W.S.Porter, D.Ray, K.S.Sharma

Improving the measurement sensitivity of the Canadian Penning Trap mass spectrometer through PI-ICR

ATOMIC MASSES 142I, 146La, 163Gd; measured frequencies; deduced mass excesses.

doi: 10.1016/j.nimb.2019.04.016
Citations: PlumX Metrics


2020OR03      Phys.Rev. C 102, 011303 (2020)

R.Orford, F.G.Kondev, G.Savard, J.A.Clark, W.S.Porter, D.Ray, F.Buchinger, M.T.Burkey, D.A.Gorelov, D.J.Hartley, J.W.Klimes, K.S.Sharma, A.A.Valverde, X.L.Yan

Spin-trap isomers in deformed, odd-odd nuclei in the light rare-earth region near N=98

ATOMIC MASSES 156,156m,158,160,160mPm, 158,160,160m,162,162m,164Eu, 162,162m,164,164m,166Tb; measured cyclotron frequency using the Canadian Penning Trap mass spectrometer at the CARIBU-ANL facility; deduced mass excesses, isomer excitation energies, Kπ, Nilsson configurations. Radioactive nuclei were produced in spontaneous fission of 252Cf source, filtered by A/Q, and purified by a multireflection time-of-flight mass separator (MR-TOF). Comparison with multiquasiparticle blocking calculations.

doi: 10.1103/PhysRevC.102.011303
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020PO07      Phys.Rev.Lett. 124, 252502 (2020)

J.L.Pore, J.M.Gates, R.Orford, C.M.Campbell, R.M.Clark, H.L.Crawford, N.E.Esker, P.Fallon, J.A.Gooding, J.T.Kwarsick, A.O.Macchiavelli, C.Morse, D.Rudolph, A.Samark-Roth, C.Santamaria, R.S.Shah, M.A.Stoyer

Identification of the New Isotope 244Md

RADIOACTIVITY 244Md, 240Es, 236Bk(α) [from 209Bi(40Ar, 5n), E ∼ 200 MeV]; measured decay products, Eα, Iα; deduced α-decay energies, T1/2.

doi: 10.1103/PhysRevLett.124.252502
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2685. Data from this article have been entered in the XUNDL database. For more information, click here.


2020WA04      Phys.Rev. C 101, 025806 (2020)

B.S.Wang, S.A.Caldwell, N.D.Scielzo, A.Czeszumska, J.A.Clark, G.Savard, A.Aprahamian, M.T.Burkey, C.J.Chiara, J.Harker, A.F.Levand, S.T.Marley, G.E.Morgan, J.M.Munson, E.B.Norman, A.Nystrom, R.Orford, S.W.Padgett, A.Perez Galvan, K.S.Sharma, K.Siegl, S.Y.Strauss

β-delayed-neutron studies of 135,136Sb and 140I performed with trapped ions

RADIOACTIVITY 135,136Sb, 140I(β-), (β-n) [from 252Cf(SF) CARIBU facility and mass scans of radioactive beams with the Canadian Penning Trap (CPT) mass spectrometer at Argonne National Laboratory]; measured recoil ions, Eβ, Eγ, (recoil ions)β- and βγ-coin using Beta-decay Paul Trap with two plastic-scintillator ΔE-E telescopes, two MCP detectors, and two HPGe detectors; deduced beta-delayed neutron spectra, beta-delayed neutron-emission probabilities (%β-n or Pn). Comparison with earlier experimental results.

doi: 10.1103/PhysRevC.101.025806
Citations: PlumX Metrics

Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14685. Data from this article have been entered in the XUNDL database. For more information, click here.


2019BU23      Hyperfine Interactions 240, 36 (2019)

M.T.Burkey, G.Savard, A.Gallant, N.D.Scielzo, J.A.Clark, T.Y.Hirsh, D.P.Burdette, E.Heckmaier, J.Klimes, K.Kolos, S.T.Marley, G.E.Morgan, R.Orford, S.Padgett, J.Pierce, R.Segel, Ku.S.Sharma, L.Varriano, B.S.Wang

Precision β - ν correlation measurements with the Beta-decay Paul Trap

RADIOACTIVITY 8Li(β-); measured decay products, Eβ, Iβ; deduced correlations. Comparison with simulations.

doi: 10.1007/s10751-019-1580-0
Citations: PlumX Metrics


2018GA34      Phys.Rev.Lett. 121, 222501 (2018)

J.M.Gates, G.K.Pang, J.L.Pore, K.E.Gregorich, J.T.Kwarsick, G.Savard, N.E.Esker, M.Kireeff Covo, M.J.Mogannam, J.C.Batchelder, D.L.Bleuel, R.M.Clark, H.L.Crawford, P.Fallon, K.K.Hubbard, A.M.Hurst, I.T.Kolaja, A.O.Macchiavelli, C.Morse, R.Orford, L.Phair, M.A.Stoyer

First Direct Measurements of Superheavy-Element Mass Numbers

RADIOACTIVITY 288Mc, 280Rg, 276Mt, 272Bh(α), 284Nh, 272Bh(α) [from 243Am(48Ca, X)288Mc, E=262 MeV]; measured decay products, Eα, Iα; deduced two α-decay events, first direct measurements of the mass numbers of superheavy elements.

doi: 10.1103/PhysRevLett.121.222501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2018HA19      Phys.Rev.Lett. 120, 182502 (2018)

D.J.Hartley, F.G.Kondev, R.Orford, J.A.Clark, G.Savard, A.D.Ayangeakaa, S.Bottoni, F.Buchinger, M.T.Burkey, M.P.Carpenter, P.Copp, D.A.Gorelov, K.Hicks, C.R.Hoffman, C.Hu, R.V.F.Janssens, J.W.Klimes, T.Lauritsen, J.Sethi, D.Seweryniak, K.S.Sharma, H.Zhang, S.Zhu, Y.Zhu

Masses and β-Decay Spectroscopy of Neutron-Rich Odd-Odd 160, 162Eu Nuclei: Evidence for a Subshell Gap with Large Deformation at N=98

RADIOACTIVITY 160,162Eu(β-); measured decay products, Eγ, Iγ; deduced γ-ray energies, partial level scheme, T1/2.

ATOMIC MASSES 160,162Eu; measured frequency ratios; deduced mass excess (ME) for the ground and isomeric states.

doi: 10.1103/PhysRevLett.120.182502
Citations: PlumX Metrics

Data from this article have been entered in the XUNDL database. For more information, click here.


2018OR02      Phys.Rev.Lett. 120, 262702 (2018)

R.Orford, N.Vassh, J.A.Clark, G.C.McLaughlin, M.R.Mumpower, G.Savard, R.Surman, A.Aprahamian, F.Buchinger, M.T.Burkey, D.A.Gorelov, T.Y.Hirsh, J.W.Klimes, G.E.Morgan, A.Nystrom, K.S.Sharma

Precision Mass Measurements of Neutron-Rich Neodymium and Samarium Isotopes and Their Role in Understanding Rare-Earth Peak Formation

ATOMIC MASSES 154,156,158,159,160Nd, 162,163,164Sm; measured cyclotron frequency ratios; deduced mass excess values. Comparison with AME16 evaluation.

doi: 10.1103/PhysRevLett.120.262702
Citations: PlumX Metrics


2018SI07      Phys.Rev. C 97, 035504 (2018)

K.Siegl, N.D.Scielzo, A.Czeszumska, J.A.Clark, G.Savard, A.Aprahamian, S.A.Caldwell, B.S.Alan, M.T.Burkey, C.J.Chiara, J.P.Greene, J.Harker, S.T.Marley, G.E.Morgan, J.M.Munson, E.B.Norman, R.Orford, S.Padgett, A.Perez Galvan, K.S.Sharma, S.Y.Strauss

Recoil ions from the β decay of 134Sb confined in a Paul trap

RADIOACTIVITY 134,134mSb(β-)[from 252Cf SF decay at CARIBU-ANL facility]; measured β, γ, singly-charged recoil ions, βγ-coin, β(ce)-coin, (recoils)β-coin, time-of-flight spectra for β(ion)-coin using Beta-decay Paul Trap (BPT); deduced charge-state distribution of the recoiling ions, mean electron loss, β-ν correlation coefficient (aβν), β-decay simulations, significant β-decay strength (17.2%) to high-lying excited states in 134Te to obtain an angular correlation consistent with expected value of unity for 0- to 0+ β transition. Comparison of the observed β-decay spectrum with that from the decay scheme in the ENSDF database or Nuclear Data Sheets for 134Sb g.s. decay. Comparison of mean atomic electron loss in 134Sb decay with that from the decays of noble gases 6He, 23Ne, 35Ar, 41Ar, 85Kr and 133Xe. 134,134mSb; half-lives used from literature and those determined at CARIBU-ANL facility (reference 23 in this work).

doi: 10.1103/PhysRevC.97.035504
Citations: PlumX Metrics


2013VA12      Phys.Rev.Lett. 111, 061102 (2013)

J.Van Schelt, D.Lascar, G.Savard, J.A.Clark, P.F.Bertone, S.Caldwell, A.Chaudhuri, A.F.Levand, G.Li, G.E.Morgan, R.Orford, R.E.Segel, K.S.Sharma, M.G.Sternberg

First Results from the CARIBU Facility: Mass Measurements on the r-Process Path

ATOMIC MASSES 130,131In, 130,131,132,133,134,135Sn, 131,132,133,134,135,136,137Sb, 133,135,136,137,138,139,140Te, 133,134,135,139,140,141I, 142,143,144,145,146Cs; measured TOF ion cyclotron resonances, cyclotron frequency; deduced mass excess. Comparison with theoretical calculations.

doi: 10.1103/PhysRevLett.111.061102
Citations: PlumX Metrics


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