NSR Query Results

Output year order : Descending
Format : Normal

NSR database version of April 27, 2024.

Search: Author = T.A.Werke

Found 10 matches.

Back to query form

2022WE04      Phys.Rev. C 106, 054615 (2022)

T.A.Werke, C.S.Salas, K.J.Glennon, D.A.Mayorov, E.E.Tereshatov, M.F.Volia, D.M.Wright, C.M.Folden, III

Measurement of fusion-evaporation cross sections for reactions of ⁴⁴Ca with ^{154, 156, 157, 160}Gd targets

NUCLEAR REACTIONS ^{154,156,157,160}Gd(⁴⁴Ca, X), (⁴⁴Ca, 3n), (⁴⁴Ca, 4n), (⁴⁴Ca, 5n), (⁴⁴Ca, 6n), (⁴⁴Ca, 7n), (⁴⁴Ca, 8n), E=214.3, 229.7 MeV; measured reaction products, evaporation residues, Eα, Iα, (fragment)α-coin; deduced total σ, evaporation residues σ. Comparison to theoretical calculations. Observed that collective enhancement to level density (CELD) applied in the calculations has a significant impact on the production of the spherical evaporation residues. Momentum Achromat Recoil Spectrometer (MARS) at K500 superconducting cyclotron of Cyclotron Institute at Texas A

RADIOACTIVITY ^{194,195,195m,196,197,197m,198,199m}Po(α)[from ^{154,156,157,160}Gd(⁴⁴Ca, X)]; measured Eα, Iα, (fragment)α-coin deduced T_1/2. Comparison to previous experimental results. Momentum Achromat Recoil Spectrometer (MARS) at K500 superconducting cyclotron of Cyclotron Institute at Texas A

doi: 10.1103/PhysRevC.106.054615
Citations: PlumX Metrics

2018NI14      Phys.Rev. C 98, 054321 (2018)

N.Nica, J.C.Hardy, V.E.Iacob, V.Horvat, H.I.Park, T.A.Werke, K.J.Glennon, C.M.Folden, V.I.Sabla, J.B.Bryant, X.K.James, M.B.Trzhaskovskaya

Precise measurement of α_K andα_T for the 39.8-keV E3 transition in ¹⁰³Rh: Test of internal-conversion theory

RADIOACTIVITY ¹⁰³Rh(IT)[from ¹⁰³Ru(β^-) produced in ¹⁰²Ru(n, γ), and ¹⁰³Pd(EC) produced in ¹⁰²Pd(n, γ) at the TRIGA reactor of Texas A and M]; measured Eγ, Iγ, K-x rays, K-shell and total internal conversion coefficients; deduced M4 admixture and mixing ratio for the 39.8-keV isomeric transition in ¹⁰³Rh. Comparison with Dirac-Fock calculations, and results disagree with the theory which ignores the K-shell atomic vacancy. ¹⁰³Ru(β^-)[from ¹⁰²Ru(n, γ), E=thermal]; measured Eγ, Iγ; deduced K-x ray intensity using the known data for multipolarities and mixing ratios of non-isomeric transitions in ¹⁰³Rh from the decay of ¹⁰³Ru. Comparison with previous experimental γ-ray intensities in ¹⁰³Ru decay.

doi: 10.1103/PhysRevC.98.054321
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2017NI10      Phys.Rev. C 95, 064301 (2017)

N.Nica, J.C.Hardy, V.E.Iacob, T.A.Werke, C.M.Folden, K.Ofodile, M.B.Trzhaskovskaya

Precise measurement of α_K and α_T for the 109.3-keV M4 transition in ¹²⁵Te: Test of internal-conversion theory

RADIOACTIVITY ^125mTe(IT)[from ¹²⁴Te(n, γ), E=thermal at 1-MW TRIGA reactor of Texas A and M Nuclear Science Center]; measured Eγ, Iγ, E(x ray), I(x ray), K-conversion coefficient, and total conversion coefficient for 109.3-keV M4 transition. Comparison with Dirac-Fock calculations.

doi: 10.1103/PhysRevC.95.064301
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2016NI05      Phys.Rev. C 93, 034305 (2016)

N.Nica, J.C.Hardy, V.E.Iacob, T.A.Werke, C.M.Folden, L.Pineda, M.B.Trzhaskovskaya

Precise measurement of α_K and α_T for the 150.8-keV E3 transition in ¹¹¹Cd: Test of internal-conversion theory

RADIOACTIVITY ^111mCd(IT)[from ¹¹⁰Cd(n, γ), E=thermal from TRIGA reactor at Texas A and M]; measured Eγ, Iγ, I(K-x rays); deduced total and K-conversion coefficients for 150.8-keV E3 transition. Comparison with theoretical value from Dirac-Fock theory which includes the atomic vacancy. Possible evidence of penetration effects for this transition.

doi: 10.1103/PhysRevC.93.034305
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.

2015MA63      Phys.Rev. C 92, 054601 (2015)

D.A.Mayorov, T.A.Werke, M.C.Alfonso, E.E.Tereshatov, M.E.Bennett, M.M.Frey, C.M.Folden

Evaporation residue excitation function measurements in ⁵⁰Ti- and ⁵⁴Cr-induced reactions with lanthanide targets

NUCLEAR REACTIONS ¹⁶⁰Gd, ¹⁵⁹Tb, ¹⁶²Dy(⁵⁰Ti, 3n), (⁵⁰Ti, 4n), (⁵⁰Ti, 5n), ¹⁵⁹Tb, ¹⁶²Dy(⁵⁰Ti, 2np), (⁵⁰Ti, 3np), ¹⁵⁹Tb(⁵⁰Ti, 4np), E=4.9 MeV/nucleon; ¹⁶²Dy(⁵⁴Cr, 4n), (⁵⁴Cr, 5n), (⁵⁴Cr, 2np), (⁵⁴Cr, 3np), 5.1 MeV/nucleon; measured reaction products, Eα and half-lives of the radioactive isotopes produced, σ(E) of evaporation residues (ER), (ER)αα-correlations, using MARS spectrometer at Texas A and M cyclotron facility. Enriched targets. ¹⁵⁹Tb, ¹⁶²Dy(⁴⁸Ca, 3n), ¹⁵⁴Gd, ¹⁵⁹Tb, ¹⁶²Dy, ¹⁶⁵Ho(⁴⁸Ca, 4n), (⁴⁸Ca, 5n), ¹⁷⁶Hf(⁴⁰Ar, 4n), (⁴⁰Ar, 5n), ¹²⁴Sn(⁹²Zr, 4n), (⁹²Zr, 5n), E(*)=35-60 MeV; analyzed σ(E). Statistical model analysis, and comparison with predictions of Bohr-Wheeler transition-state theory. Discussed effect of collective enhancement of level density (CELD).

RADIOACTIVITY ^204,205,206Rn, ^{204,205,206,208,209}Fr, ^208,209Ra(α)[from ¹⁶⁰Gd, ¹⁵⁹Tb, ¹⁶²Dy(⁵⁰Ti, X), E=4.9 MeV/nucleon; ^212,213Ac(α)[from ¹⁶²Dy(⁵⁴Cr, X), E=5.1 MeV/nucleon]; measured Eα, half-lives of ²⁰⁵Fr and ²⁰⁸Ra decays.

doi: 10.1103/PhysRevC.92.054601
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2203. Data from this article have been entered in the XUNDL database. For more information, click here.

2015WE13      Phys.Rev. C 92, 034613 (2015)

T.A.Werke, D.A.Mayorov, M.C.Alfonso, M.E.Bennett, M.J.DeVanzo, M.M.Frey, E.E.Tereshatov, C.M.Folden

Hot fusion-evaporation cross sections of ⁴⁵Sc-induced reactions with lanthanide targets

NUCLEAR REACTIONS ^{156,157,158,160}Gd, ¹⁵⁹Tb, ¹⁶²Dy(⁴⁵Sc, 3n), (⁴⁵Sc, 4n), (⁴⁵Sc, 5n), (⁴⁵Sc, 6n), (⁴⁵Sc, 2np), (⁴⁵Sc, 3np), ¹⁶²Dy(⁴⁵Sc, α), (⁴⁵Sc, nα), (⁴⁵Sc, 2nα), E≈5 MeV/nucleon; measured reaction products, Eα from decay products, evaporation residue cross sections σ(E) for 3n-, 4n-, 5n-, 6n-, p2n-, p3n-, p4n-, p5n-channels and α-, αn, α2n-channels for ¹⁶²Dy using Momentum Achromat Recoil Spectrometer (MARS) at Texas A and M; deduced influence of collective enhancements to level density (CELD). Comparison with theoretical model for the fusion-evaporation process. Relevance to production of SHE region nuclei.

RADIOACTIVITY ^{197,198,199,200m,201}At, ^{197,198,199,201m}Po, ^200,203mRn, ²⁰³Fr(α)[from ^{156,157,158,160}Gd, ¹⁵⁹Tb, ¹⁶²Dy(⁴⁵Sc, 4n), (⁴⁵Sc, 3np), E≈5 MeV/nucleon]; measured Eα. Comparison with previously measured values.

doi: 10.1103/PhysRevC.92.034613
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2193.

2015WE16      Phys.Rev. C 92, 054617 (2015)

T.A.Werke, D.A.Mayorov, M.C.Alfonso, E.E.Tereshatov, C.M.Folden, III

Hot fusion-evaporation cross sections of ⁴⁴Ca-induced reactions with lanthanide targets

NUCLEAR REACTIONS ¹⁵⁸Gd(⁴⁴Ca, 3n), (⁴⁴Ca, 4n), (⁴⁴Ca, 5n), (⁴⁴Ca, 6n), E=177.6, 184.2, 185.7, 188.4, 191.3, 196.0; ¹⁵⁹Tb(⁴⁴Ca, 3n), (⁴⁴Ca, 4n), (⁴⁴Ca, 5n), (⁴⁴Ca, 3np), (⁴⁴Ca, 4np), (⁴⁴Ca, 5np), E=184.7, 189.8, 196.3, 200.5, 208.0; ¹⁶²Dy(⁴⁴Ca, 3n), (⁴⁴Ca, 4n), (⁴⁴Ca, 5n), (⁴⁴Ca, 2np), (⁴⁴Ca, 3np), (⁴⁴Ca, 4np), (⁴⁴Ca, 5np), E=183.7, 188.9, 195.4, 199.5, 207.1; measured reaction products, σ(E) using Momentum Recoil Achromat Spectrometer (MARS) at Cyclotron Institute of Texas A and M University. Comparison with theoretical model calculations with and without consideration of collective enhancements to level density (CELD), and with experimental σ(E) for ⁴⁵Sc induced reactions on the same targets; deduced little evidence for cross-sectional enhancement due to shell stabilization of compound nucleus.

RADIOACTIVITY ^197,198Po(α)[from ¹⁵⁸Gd(⁴⁴Ca, 5n), (⁴⁴Ca, 4n), E≈5 MeV/nucleon]; ¹⁹⁹At, ^199mPo(α)[from ¹⁵⁹Tb(⁴⁴Ca, 4n), (⁴⁴Ca, 3np), E≈5 MeV/nucleon]; ²⁰²Rn, ²⁰²At(α)[from ¹⁶²Dy(⁴⁴Ca, 4n), (⁴⁴Ca, 3np), E≈5 MeV/nucleon]; Measured Eα, and T_1/2 of ¹⁹⁹At, ²⁰²Rn decays. Comparison with evaluated data in the chart of nuclides on NNDC webpage.

doi: 10.1103/PhysRevC.92.054617
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2206. Data from this article have been entered in the XUNDL database. For more information, click here.

2014MA66      Phys.Rev. C 90, 024602 (2014)

D.A.Mayorov, T.A.Werke, M.C.Alfonso, M.E.Bennett, C.M.Folden

Production cross sections of elements near the N=126 shell in ⁴⁸Ca-induced reactions with ¹⁵⁴Gd, ¹⁵⁹Tb, ¹⁶²Dy, and ¹⁶⁵Ho targets

NUCLEAR REACTIONS ¹⁵⁴Gd(⁴⁸Ca, 3n)^199mPo, ¹⁵⁴Gd(⁴⁸Ca, 4n)¹⁹⁸Po, ¹⁵⁴Gd(⁴⁸Ca, 5n)^197mPo, ¹⁵⁹Tb(⁴⁸Ca, 3n)²⁰⁴At, (⁴⁸Ca, 4n)²⁰³At, (⁴⁸Ca, 5n)²⁰²At, (⁴⁸Ca, 6n)²⁰¹At, ¹⁶²Dy(⁴⁸Ca, 3n)²⁰⁷Rn, (⁴⁸Ca, xn)²⁰⁶Rn/²⁰⁵Rn, (⁴⁸Ca, 6n)²⁰⁴Rn, ¹⁶⁵Ho(⁴⁸Ca, 3n)²¹⁰Fr, (⁴⁸Ca, xn)²⁰⁹Fr/²⁰⁸Fr, (⁴⁸Ca, 6n)²⁰⁷Fr, E=180-210 MeV; measured reaction products, α spectra from residues, evaporation residue σ(E) using MARS spectrometer at Texas A-M cyclotron facility; deduced signature of collective effects. Comparison with theoretical σ(E), calculated with and without the inclusion of collective enhancement of level density. Discussed implications for production of superheavy elements.

RADIOACTIVITY ^198,199mPo, ^203,204At, ^206,207Rn, ^209,210Fr(α)[from ¹⁵⁴Gd, ¹⁵⁹Tb, ¹⁶²Dy, ¹⁶⁵Ho(⁴⁸Ca, xn), E=180-210 meV]; measured Eα, compared with previous experimental values.

doi: 10.1103/PhysRevC.90.024602
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC2127.

2012BE07      Nucl.Instrum.Methods Phys.Res. B276, 62 (2012)

M.E.Bennett, D.A.Mayorov, K.D.Chapkin, M.C.Alfonso, T.A.Werke, C.M.Folden III

Measurement of the ^natLu(p, x)¹⁷⁵Hf excitation function

NUCLEAR REACTIONS Lu(p, X)¹⁷⁵Hf, E=5.2-16.7 MeV; Ti(p, X)⁴⁸V, E=6.9-16 MeV; measured reaction products, Eγ, Iγ; deduced σ. Comparison with available data.

doi: 10.1016/j.nimb.2012.01.039
Citations: PlumX Metrics
Data from this article have been entered in the EXFOR database. For more information, access X4 datasetC1909.

2012FO09      Nucl.Instrum.Methods Phys.Res. A678, 1 (2012)

C.M.Folden III, M.C.Alfonso, D.A.Mayorov, K.R.Lawrence, A.A.Alharbi, E.Berdugo, P.J.Cammarata, A.C.Raphelt, B.T.Roeder, T.A.Werke

Development of the MARS separator for heavy element studies

NUCLEAR REACTIONS ¹⁶⁵Ho(⁴⁰Ar, xnyp)¹⁹⁷Po/^197mPo/¹⁹⁸Po/¹⁹⁸At/¹⁹⁹Po/^199mPo/¹⁹⁹At/²⁰⁰At, E=220.2 MeV; measured Eα, half-lives, (EVR)α correlations, excitation functions, σ for production of heavy-element studies using MARS separator at Texas A

doi: 10.1016/j.nima.2012.02.035
Citations: PlumX Metrics
Data from this article have been entered in the XUNDL database. For more information, click here.