NSR Query Results
Output year order : Descending NSR database version of April 27, 2024. Search: Author = V.Horvat Found 19 matches. 2020HO10 Phys.Rev. C 102, 014310 (2020) V.Horvat, E.E.Tereshatov, J.C.Hardy, N.Nica, C.M.Folden, V.E.Iacob, M.B.Trzhaskovskaya K-shell internal conversion coefficient for M4 decay of the 30.8 keV isomer in 93Nb RADIOACTIVITY 93Nb(IT); measured Eγ, Iγ, and K-shell conversion coefficient of the 30.76-keV M4 transition from the 30.76-keV, (1/2-) isomer using a Si(Li) detector for direct IT γ-ray and IC K-shell x-ray detection; deduced precise level energy of the isomer. Comparison with different theoretical models.
doi: 10.1103/PhysRevC.102.014310
2020IA01 Phys.Rev. C 101, 015504 (2020) V.E.Iacob, J.C.Hardy, H.I.Park, M.Bencomo, L.Chen, V.Horvat, N.Nica, B.T.Roeder, A.Saastamoinen New precise half-life measurement for the superallowed β+ emitter 34Ar RADIOACTIVITY 34Ar(β+) [from 1H(35Cl, 2n), E=30 MeV/nucleon at the K500 superconducting cyclotron of Texas A and M University, followed by separation of fragments using the Momentum Achromat Recoil Spectrometer (MARS)]; measured Eβ, decay time spectrum, precise T1/2 of 34Ar decay using 4π proportional gas counter; deduced ft value for the superallowed β transition. Data analyzed as a linked parent-daughter pair. Discussed uncertainty budget. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.101.015504
2020IA02 Phys.Rev. C 101, 045501 (2020) V.E.Iacob, J.C.Hardy, H.I.Park, M.Bencomo, L.Chen, V.Horvat, N.Nica, B.T.Roeder, A.Saastamoinen, I.S.Towner Precise β branching-ratio measurement for the 0+ → 0+ superallowed decay of 34Ar RADIOACTIVITY 34Ar(β+), (EC)[from 1H(35Cl, 2n), E=30 MeV/nucleon, followed by separation of fully stripped reaction ejectiles using the MARS spectrometer at the K500 superconducting cyclotron at Texas A and M University]; measured Eβ+, Iβ+, Eγ, Iγ, β+γ-coin. 34Cl; deduced levels, J, π, β-branching ratio, EC to β+ emission ratios, logft, superallowed 0+ to 0+ β transition, isospin-symmetry-breaking correction, ratios of ft values for the mirror pair of superallowed transitions 34Ar to 34Cl and 34Cl to 34S. Comparison with previous experimental data, and with shell model calculations with Woods-Saxon radial wave functions. Systematics of logft ratios in A=26, 34, 38 and 42 mirror pairs. Relevance to up-down quark-mixing element Vud of the Cabibbo-Kobayashi-Maskawa matrix.
doi: 10.1103/PhysRevC.101.045501
2019BE23 Phys.Rev. C 100, 015503 (2019) M.Bencomo, J.C.Hardy, V.E.Iacob, H.I.Park, L.Chen, V.Horvat, N.Nica, B.T.Roeder, A.Saastamoinen, I.S.Towner Precise branching ratio measurement for the superallowed β+ decay of 26Si: Completion of a second mirror pair RADIOACTIVITY 26Si(β+), (EC)[from 1H(27Al, 2n), E=30 MeV/nucleon from the Texas A and M University K500 superconducting cyclotron, followed by analysis of reaction products by MARS system according to A/Q ratio]; measured β+ particles, Eγ, Iγ, β+γ-coin using plastic scintillator for β+ detection and HPGe detector for γ detection. 26Al; deduced levels, β++ϵ branching ratios, Gamow-Teller branches, superallowed (0+ to 0+) decay branch, logft, Ft. Comparison with sd shell-model calculations using USD, USD-A, and USD-B effective interactions. Discussed relevance to determination of up-down Vud quark-mixing element of the Cabibbo-Kobayashi-Maskawa matrix.
doi: 10.1103/PhysRevC.100.015503
2018IA01 Phys.Rev. C 97, 035501 (2018) V.E.Iacob, J.C.Hardy, L.Chen, V.Horvat, M.Bencomo, N.Nica, H.I.Park, B.T.Roeder, A.Saastamoinen Precise half-life measurement of the superallowed emitter 30S RADIOACTIVITY 30S(β+), (EC)[from 1H(31P, 2n), E=30 MeV/nucleon]; 30P(β+), (EC)[from 30S decay]; measured β+ using 4π proportional gas counter, half-lives of 30S and 30P decays. Comparison with previous measurements. Relevance to determination of up-down element of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix Vud for 0+ to 0+ superallowed β transition in the decay of 30S to 30P. NUCLEAR REACTIONS 1H(31P, 2n)27Si/29P/30S/31S, E=30 MeV/nucleon; measured yields of ions momentum achromat recoil spectrometer (MARS) spectrometer at Texas A and M University K500 superconducting cyclotron facility.
doi: 10.1103/PhysRevC.97.035501
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 αK andαT 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
2015PA32 Phys.Rev. C 92, 015502 (2015) H.I.Park, J.C.Hardy, V.E.Iacob, M.Bencomo, L.Chen, V.Horvat, N.Nica, B.T.Roeder, E.McCleskey, R.E.Tribble, I.S.Towner Precise measurement of branching ratios in the β decay of 38Ca RADIOACTIVITY 38Ca(β+), (EC)[from 1H(39K, 2n), E=30 MeV/nucleon]; measured fully-stripped reaction ejectiles using Momentum Achromat Recoil Spectrometer (MARS) at Texas A and M cyclotron facility, Eβ, Iβ, Eγ, Iγ, β+γ-coin. 38K; deduced levels, J, π, β+ branching ratios, logft values, branching ratio and Ft value for superallowed β transition, the up-down quark-mixing element of the Cabibbo-Kobayashi-Maskawa (CKM) matrix Vud. Comparison with shell-model calculations.
doi: 10.1103/PhysRevC.92.015502
2014HA08 Appl.Radiat.Isot. 87, 297 (2014) J.C.Hardy, V.E.Iacob, H.I.Park, L.Chen, N.Nica, V.Horvat, R.E.Tribble, I.S.Towner FT values measured to ±0.1 percent for superallowed beta transitions: Metrology at sub-second time scales RADIOACTIVITY 10C, 14O, 22Mg, 26Al, 34Cl, 34Ar, 38K, 42Sc, 46V, 50Mn, 54Co, 62Ga, 74Rb(EC); measured decay products, Eβ, Iβ, Eγ, Iγ; deduced log ft, T1/2 and their uncertainties. Comparison with theoretical calculations.
doi: 10.1016/j.apradiso.2013.11.018
2014NI02 Phys.Rev. C 89, 014303 (2014) N.Nica, J.C.Hardy, V.E.Iacob, M.Bencomo, V.Horvat, H.I.Park, M.Maguire, S.Miller, M.B.Trzhaskovskaya Precise measurement of αK for the 65.7-keV M4 transition in 119Sn: Extended test of internal-conversion theory RADIOACTIVITY 119Sn(IT)[from 118Sn(n, γ)]; measured Eγ, Iγ, E(x rays), I(x rays); deduced K-shell internal conversion coefficient of 65.7-keV M4 transition. Comparisons with theoretical conversion coefficient from Dirac-Fock relativistic calculation with and without K-shell atomic vacancy, and with previous measurements.Evidence of support for inclusion of atomic vacancy from comparison of precisely measured conversion coefficients with theoretical calculations for E2, E3 and M4 isomeric transitions in 20 cases including 119Sn, 134Cs, 137Ba, 193Ir and 197Pt.
doi: 10.1103/PhysRevC.89.014303
2014PA09 Phys.Rev.Lett. 112, 102502 (2014) H.I.Park, J.C.Hardy, V.E.Iacob, M.Bencomo, L.Chen, V.Horvat, N.Nica, B.T.Roeder, E.Simmons, R.E.Tribble, I.S.Towner β Decay of 38Ca: Sensitive test of Isospin Symmetry-Breaking Corrections from Mirror Superallowed 0+ → 0+ Transitions RADIOACTIVITY 38Ca, 38K(β+) [from 1H(39K, 2n)38Ca, E=30 MeV/nucleon]; measured decay products, Eγ, Iγ; deduced branching ratio, high-precision log ft value. Test of the isospin symmetry-breaking corrections, comparison with available data.
doi: 10.1103/PhysRevLett.112.102502
2013CH51 Nucl.Instrum.Methods Phys.Res. A728, 81 (2013) L.Chen, J.C.Hardy, M.Bencomo, V.Horvat, N.Nica, H.I.Park Digital beta counting and pulse-shape analysis for high-precision nuclear beta decay half-life measurements: Tested on 26Alm RADIOACTIVITY 26Al(EC) [from H(27Al, X), E=23 MeV/nucleon]; measured decay products, Eβ, Iβ; deduced T1/2 and its uncertainty. Comparison with available data.
doi: 10.1016/j.nima.2013.06.039
2011PA38 Phys.Rev. C 84, 065502 (2011) H.I.Park, J.C.Hardy, V.E.Iacob, A.Banu, L.Chen, V.V.Golovko, J.Goodwin, V.Horvat, N.Nica, E.Simmons, L.Trache, R.E.Tribble Precise half-life measurement of the superallowed β+ emitter 38Ca RADIOACTIVITY 38Ca, 38mK(β+), (EC)[38Ca from 1H(39K, 2n), E=30 MeV/nucleon, 38K from 38Ca decay]; measured I(β+) using 4π proportional gas counter, half-life, data analyzed as a linked parent-daughter decay. Comparison with previous results. Superallowed β+ emitters.
doi: 10.1103/PhysRevC.84.065502
2010IA01 Phys.Rev. C 82, 035502 (2010) V.E.Iacob, J.C.Hardy, A.Banu, L.Chen, V.V.Golovko, J.Goodwin, V.Horvat, N.Nica, H.I.Park, L.Trache, R.E.Tribble Precise half-life measurement of the superallowed β+ emitter 26Si RADIOACTIVITY 26Si(β+)[from 1H(27Al, 2n), E=30 MeV/nucleon]; measured Eβ, Iβ using a 4π proportional gas counter system, and half-life. Comparison with previous results.
doi: 10.1103/PhysRevC.82.035502
1992HO17 Phys.Rev. A46, 2572 (1992) V.Horvat, G.Sampoll, K.Wohrer, M.Chabot, R.L.Watson K-Shell Ionization of Intermediate-Z Elements by 30-MeV/amu H, N, Ne, and Ar Ions NUCLEAR REACTIONS 27Al, Ti, Fe, Cu, Ge, Zr, Mo, Pd, Sn(p, X), (N, X), (Ne, X), (Ar, X), E=30 MeV/nucleon; measured K (X-ray) production σ, double K-shell ionization I X-ray. ATOMIC PHYSICS 27Al, Ti, Fe, Cu, Ge, Zr, Mo, Pd, Sn(p, X), (N, X), (Ne, X), (Ar, X), E=30 MeV/nucleon; measured K (X-ray) production σ, double K-shell ionization I X-ray.
doi: 10.1103/PhysRevA.46.2572
1991HO25 Nucl.Instrum.Methods Phys.Res. B56/57, 61 (1991) V.Horvat, R.L.Watson, G.Sampoll, T.Lotze, B.Hill K- Plus L-Shell Ionization of Fourth Row Elements by 30 MeV/amu Ar Ions NUCLEAR REACTIONS Ti, V, Cr, Fe, 59Co, Ni, Cu, Zn(Ar, X), E=30 MeV/nucleon; measured K X-ray spectra; deduced double-to-single target K-shell ionization probabilities, single-, double K-shell vacancies relative probabilities. ATOMIC PHYSICS Ti, V, Cr, Fe, 59Co, Ni, Cu, Zn(Ar, X), E=30 MeV/nucleon; measured K X-ray spectra; deduced double-to-single target K-shell ionization probabilities, single-, double K-shell vacancies relative probabilities.
doi: 10.1016/0168-583X(91)95971-F
1990JE03 Fizika(Zagreb) 22, 413 (1990) G.Jerbic-Zorc, K.Ilakovac, Z.Krecak, V.Horvat Decay of the 514-keV Metastable State in 85Rb RADIOACTIVITY 85Sr(EC); measured γγ-coin. 85Rb deduced level decay features, branching ratio.
1988IL01 Fizika(Zagreb) 20, 91 (1988) K.Ilakovac, G.Jerbic-Zorc, M.Bozin, R.Pesic, V.Horvat Search for Double-Photon Decay of the 109Ag Metastable State at 88 keV RADIOACTIVITY 109Cd(EC); measured γ(K X-ray)-coin. 109Ag level deduced no double photon decay.
1985HO06 Phys.Rev. A31, 1543 (1985) Decay of the Double-K-Shell-Vacancy State in Silver Atoms Created in the Decay of 109Cd RADIOACTIVITY 109Cd(EC); measured I(K X-ray) ratios; deduced Ag atom double K-shell vacancy state.
doi: 10.1103/PhysRevA.31.1543
1981VE17 Radiochem.Radioanal.Lett. 47, 35 (1981) B.Vekic, L.Horvath, V.Horvat, M.Vlatkovic Production of I-123 by Alpha-Bombardment of Natural Antimony NUCLEAR REACTIONS 121Sb(α, 2n), E=26 MeV; measured 123I yield. Activation technique.
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