Nuclear Science References (NSR)

RADIOACTIVITY ⁴⁷Ca(β^-); measured decay products, Eγ, Iγ; deduced γ-ray energies, beta decay branching ratios, T_1/2. Isotope harvesting at the National Superconducting Cyclotron Laboratory.

doi: 10.1016/j.apradiso.2021.109994
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2022BE23 Appl.Radiat.Isot. 189, 110414 (2022)

J.A.Bence, S.Satija, K.A.Domnanich, J.D.Despotopulos, E.P.Abel, H.K.Clause, S.Essenmacher, M.Kalman, C.Kleinfeldt, K.N.Kmak, T.Parsons-Davis, C.K.Vyas, W.Walker, N.D.Scielzo, G.W.Severin, J.A.Shusterman

Solid-phase isotope harvesting of ⁸⁸Zr from a radioactive ion beam facility

NUCLEAR REACTIONS ²⁷Al, Cu, ¹⁹⁷Au(⁸⁸Zr, X)⁸⁸Zr/⁸⁸Y, E=140 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced isotope harvesting yields. National Superconducting Cyclotron Laboratory.

doi: 10.1016/j.apradiso.2022.110414
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2022CL04 Sci. Rep. 12, 1433 (2022)

H.K.Clause, K.A.Domnanich, C.Kleinfeldt, M.Kalman, W.Walker, C.Vyas, E.P.Abel, G.W.Severin

Harvesting krypton isotopes from the off-gas of an irradiated water target to generate ⁷⁶Br and ⁷⁷Br

NUCLEAR REACTIONS H, O(⁷⁸Kr, X)⁷⁶Kr/⁷⁷Kr, E=150 MeV/nucleon; measured reaction products, Eγ, Iγ. ^76,77Br; deduced yields or production rates, average extraction efficiency. The National Superconducting Cyclotron Laboratory.

doi: 10.1038/s41598-022-05500-8
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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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2019AB12 J.Phys.(London) G46, 100501 (2019)

E.P.Abel, M.Avilov, V.Ayres, E.Birnbaum, G.Bollen, G.Bonito, T.Bredeweg, H.Clause, A.Couture, J.DeVore, M.Dietrich, P.Ellison, J.Engle, R.Ferrieri, J.Fitzsimmons, M.Friedman, D.Georgobiani, S.Graves, J.Greene, S.Lapi, C.S.Loveless, T.Mastren, C.Martinez-Gomez, S.McGuinness, W.Mittig, D.Morrissey, G.Peaslee, F.Pellemoine, J.D.Robertson, N.Scielzo, M.Scott, G.Severin, D.Shaughnessy, J.Shusterman, J.Singh, M.Stoyer, L.Sutherlin, A.Visser, J.Wilkinson

Isotope harvesting at FRIB: additional opportunities for scientific discovery

doi: 10.1088/1361-6471/ab26cc
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2018AB02 Phys.Rev. C 97, 034312 (2018)

E.P.Abel, H.K.Clause, J.Fonslet, R.J.Nickles, G.W.Severin

Half-lives of ¹³²La and ¹³⁵La

RADIOACTIVITY ^132,133,135La(β⁺), (EC)[from Ba(p, X), E=16.5 MeV using GE-PET trace cyclotron at University of Wisconsin followed by chemistry]; measured Eγ, Iγ, β radiation, half-lives using gamma-spectrometry and high-precision ionization-chamber. Comparison with previous measurements, and evaluated data. Relevance to medical applications.

RADIOACTIVITY ⁶⁴Cu(β^-), (β⁺), (EC); measured decay products; deduced T_1/2 of ⁶⁴Cu decay using an ionization chamber.

doi: 10.1103/PhysRevC.97.034312
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2015VO18 Phys.Rev. C 92, 065502 (2015)

P.A.Voytas, E.A.George, G.W.Severin, L.Zhan, L.D.Knutson

Measurement of the branching ratio for the β decay of ¹⁴O

RADIOACTIVITY ¹⁴O(EC), (β⁺)[from N(p, n), E=8 MeV]; measured Eβ, Iβ positron spectra using a superconducting magnetic spectrometer and a thick Si(Li) detector at the University of Wisconsin Nuclear Physics Laboratory; deduced β branching ratio and partial half-life for superallowed 0+ to 0+ Fermi decay to the first excited state of ¹⁴N, logft, Ft. Discussed impact on the determination of the V_ud element of the CKM matrix. Comparison with previous experimental measurements, and with evaluation of other superallowed 0+ to 0+ β transitions.

doi: 10.1103/PhysRevC.92.065502
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2014GE07 Phys.Rev. C 90, 065501 (2014)

E.A.George, P.A.Voytas, G.W.Severin, L.D.Knutson

Measurement of the shape factor for the β decay of ¹⁴O

RADIOACTIVITY ¹⁴O(β⁺)[from ¹⁴N(p, n), E=8 MeV]; measured Eγ, Iγ using BGO detector, Eβ, Iβ using a superconducting beta spectrometer at University of Wisconsin Nuclear Physics Laboratory; deduced statistical shape S(E) of the β⁺ spectrum for the 0+ to 1+ β transition as a function of the positron kinetic energy. Comparison with predictions from theoretical calculations. Relevance to test of conserved vector current (CVC) hypothesis.

doi: 10.1103/PhysRevC.90.065501
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2014SE12 Phys.Rev. C 89, 057302 (2014)

G.W.Severin, L.D.Knutson, P.A.Voytas, E.A.George

⁶⁶Ga ground state β spectrum

RADIOACTIVITY ⁶⁶Ga(β⁺), (EC)[from Zn(p, X), E=11 MeV from Wisconsin RDS-111 cyclotron]; measured E(β), I(β), Kurie plot, shape of the ground-state 0+ to 0+ Fermi β transition using a new iron-free superconducting β spectrometer at University of Wisconsin; deduced slope and precise endpoint energy. Monte Carlo simulations. Comparison with previous experimental results, and with evaluations.

doi: 10.1103/PhysRevC.89.057302
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2012EN01 Appl.Radiat.Isot. 70, 355 (2012)

J.W.Engle, G.W.Severin, T.E.Barnhart, L.D.Knutson, R.J.Nickles

Cross sections of the ³⁶Ar(d, α)^34mCl, ⁴⁰Ar(d, α)³⁸Cl, and ⁴⁰Ar(d, p)⁴¹Ar nuclear reactions below 8.4 MeV

NUCLEAR REACTIONS ^36,40Ar(d, α), (d, p), E<8.4 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with ALICE/ASN code calculations.

doi: 10.1016/j.apradiso.2011.10.003
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2012EN03 Appl.Radiat.Isot. 70, 1792 (2012)

J.W.Engle, V.Lopez-Rodriguez, R.E.Gaspar-Carcamo, H.F.Valdovinos, M.Valle-Gonzalez, F.Trejo-Ballado, G.W.Severin, T.E.Barnhart, R.J.Nickles, M.A.Avila-Rodriguez

Very high specific activity ^66/68Ga from zinc targets for PET

NUCLEAR REACTIONS ⁶⁶Zn, Zn(p, n)⁶⁶Ga/⁶⁸Ga, E=7-16 MeV; measured reaction products, Eγ, Iγ; deduced yields. Comparison with available data.

doi: 10.1016/j.apradiso.2012.30.030
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2012SE03 Appl.Radiat.Isot. 70, 1526 (2012)

G.W.Severin, J.W.Engle, H.F.Valdovinos, T.E.Barnhart, R.J.Nickles

Cyclotron produced ^44gSc from natural calcium

NUCLEAR REACTIONS Ca(p, X)⁴³Sc/⁴⁴Sc/⁴⁷Sc/⁴⁸Sc, E=16 MeV; measured reaction products; deduced thick target yields, reactivity.

doi: 10.1016/j.apradiso.2012.04.030
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2010SE16 Phys.Rev. C 82, 067301 (2010)

G.W.Severin, L.D.Knutson, P.A.Voytas, E.A.George

Half-life of ⁶⁶Ga

RADIOACTIVITY ⁶⁶Ga(β⁺)[from ⁶⁶Zn(p, n), E=7 MeV]; measured Eβ, Iβ, isotopic half-life. Comparison with previous studies and evaluations.

doi: 10.1103/PhysRevC.82.067301
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