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NSR database version of April 27, 2024.

Search: Author = K.J.Thomas

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2021SH10      Phys.Rev. C 103, 024614 (2021)

J.A.Shusterman, N.D.Scielzo, E.P.Abel, H.K.Clause, N.D.Dronchi, W.D.Frey, N.Gharibyan, J.A.Hart, C.S.Loveless, S.R.McGuinness, L.T.Sutherlin, K.J.Thomas, S.E.Lapi, J.D.Robertson, M.A.Stoyer, E.B.Norman, G.F.Peaslee, G.W.Severin, D.A.Shaughnessy

Aqueous harvesting of ⁸⁸Zr at a radioactive-ion-beam facility for cross-section measurements

NUCLEAR REACTIONS ⁸⁸Zr, ⁸⁸Y(n, γ), E=thermal, [secondary ⁸⁸Zr beam from ⁹Be(⁹²Mo, X)⁸⁸Zr, E=140 MeV/nucleon, and deposited in a water cell]; measured capture σ and resonance integrals by irradiating ⁸⁸Zr deposited activity at the reactor facilities of the University of Missouri Research Reactor (MURR) and the McClellan Nuclear Research Center (MNRC) of UC-Davis. ⁹Be(⁹²Mo, X)⁸⁸Zr, E=140 MeV/nucleon; measured reaction fragments separated by A1900 separator, and detected by particle identification detector (PID) via energy-loss and time-of-flight measurements, finally deposited the secondary beam in the water target irradiation cell of an aqueous harvesting end station, and also deposited in a graphite puck at NSCL-MSU cyclotron facility. ^81,82,83,84Rb, ^81,84,85,86Sr, ^{84,85,86m,86,87m,87}Y, ^86,87,88,89Zr, ^89,90,91Nb; measured Eγ, Iγ; deduced production rates in PID detector, and in activity collected in a graphite puck, with dominant component of ⁸⁸Zr, and ⁸⁸Y as its decay product.

doi: 10.1103/PhysRevC.103.024614
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14697.

2019SH01      Nature(London) 565, 328 (2019)

J.A.Shusterman, N.D.Scielzo, K.J.Thomas, E.B.Norman, S.E.Lapi, C.S.Loveless, N.J.Peters, J.D.Robertson, D.A.Shaughnessy, A.P.Tonchev

The surprisingly large neutron capture cross-section of ⁸⁸Zr

NUCLEAR REACTIONS ⁸⁸Zr(n, γ), E thermal; measured reaction products, Eγ, Iγ; deduced σ.

doi: 10.1038/s41586-018-0838-z
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14520.

2018JA15      J.Radioanal.Nucl.Chem. 318, 107 (2018), Erratum J.Radioanal.Nucl.Chem. 323, 675 (2020)

M.J.Jackson, C.Gilligan, A.V.Davies, R.Britton, J.I.Friese, L.R.Greenwood, B.D.Pierson, Z.S.Finch, B.N.Gartman, D.DryI.May, N.C.Smythe, A.J.Gaunt, E.R.Thomas, K.E.Roberts, N.K.Harward, K.J.Thomas, P.T.Woody, P.Zhao

International inter-comparison exercise on ¹⁵³Sm

RADIOACTIVITY ¹⁵³Sm(β^-) [from ¹⁵²Sm(n, γ), E not given]; measured decay products, Eγ, Iγ, Eβ, Iβ; deduced activities in Becquerels and that the current published cumulative fission yield for ¹⁵³Sm is approximately 15% high, historical bias observed for many years between beta counting via ga s proportional methods and gamma spectrometry.

doi: 10.1007/s10967-018-6048-1
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2016CH04      Phys.Rev. C 93, 014611 (2016)

B.Champine, M.E.Gooden, Krishichayan, E.B.Norman, N.D.Scielzo, M.A.Stoyer, K.J.Thomas, A.P.Tonchev, W.Tornow, B.S.Wang

Measurement of the ¹⁶⁹Tm(n, 3n)¹⁶⁷Tm cross section and the associated branching ratios in the decay of ¹⁶⁷Tm

NUCLEAR REACTIONS ¹⁶⁹Tm(n, 3n), ⁵⁸Ni, ⁹⁰Zr, ¹⁶⁹Tm(n, 2n), ⁹⁴Zr(n, α), E=17.35, 18.34, 19.33, 20.32, 21.31 MeV, [quasimonoenergetic neutrons from ²H(d, n), E=15.0-19.2 at TUNL tandem Van de Graaff accelerator]; measured neutron spectra, Eγ, Iγ, σ(E) by activation method. Comparison with previous experimental data, compiled data in EXFOR database and evaluated data in ENDF database. Relevance to measurement of yield of reaction-in-flight neutrons at the LLNL National Ignition Facility (NIF).

RADIOACTIVITY ¹⁶⁷Tm(EC)[from ¹⁶⁵Ho(α, 2n), E=29 MeV at LBNL cyclotron facility]; measured Eγ, Iγ, I(x rays), source activity; deduced branching ratios of 207.8-keV and 531.5-keV γ rays. Comparison with previous experimental values and evaluated data.

doi: 10.1103/PhysRevC.93.014611
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset14447. Data from this article have been entered in the XUNDL database. For more information, click here.

2015WA26      Phys.Rev. C 92, 024620 (2015)

B.S.Wang, E.B.Norman, N.D.Scielzo, A.R.Smith, K.J.Thomas, S.A.Wender

Cosmogenic-neutron activation of TeO₂ and implications for neutrinoless double-β decay experiments

NUCLEAR REACTIONS Te, O(n, X)⁷Be/⁶⁰Co/¹⁰¹Rh/^101mRh/^102mRh/¹⁰⁵Ag/^106mAg/¹¹⁰Ag/^110mAg/¹¹¹Ag/¹¹¹In/^114mIn/¹¹³Sn/^117mSn/¹¹⁸Sb/¹¹⁹Sb/^120mSb/¹²²Sb/¹²⁴Sb/¹²⁵Sb/¹²⁶Sb/¹²⁷Sb/^131mXe/¹¹⁸Te/^119mTe/¹²¹Te/^121mTe/^123mTe/^125mTe/¹²⁷Te/^127mTe/¹²⁹Te/^129mTe/¹³¹Te/^131mTe, E<800 MeV from LANSCE-LANL facility; measured off-line Eγ, Iγ at Low Background Facility of LBNL; deduced flux-averaged cross sections; estimated cosmogenic-activation background from ¹¹⁰Ag and ⁶⁰Co in connection with ¹³⁰Te 0νββ-decay experiments at CUORE and SNO-2. Benchmarking by GEANT4 simulations. Comparison of measured σ with calculations using ACTIVIA code based on Silberberg and Tsao (S and T) semiempirical formulas.

doi: 10.1103/PhysRevC.92.024620
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