NSR Query Results
Output year order : Descending NSR database version of April 25, 2024. Search: Author = R.K.Grzywacz Found 36 matches. 2023HA16 Nucl.Data Sheets 189, 224 (2023) L.Hariasz, P.C.F.Di Stefano, M.Stukel, B.C.Rasco, K.P.Rykaczewski, N.T.Brewer, R.K.Grzywacz, E.D.Lukosi, D.W.Stracener, M.Mancuso, F.Petricca, J.Ninkovic, P.Lechner Precision measurement of 65Zn electron-capture decays with the KDK coincidence setup RADIOACTIVITY 65Zn(EC); measured decay products, X-rays, Eγ, Iγ, Eβ, Iβ; deduced the absolute emission intensity of 1115 keV γ-rays, the total EC0 branching ratio, decay scheme. Comparison with NNDC values. Modular Total Absorption Spectrometer (MTAS).
doi: 10.1016/j.nds.2023.04.003
2023HA25 Phys.Rev. C 108, 014327 (2023) L.Hariasz, M.Stukel, P.C.F.Di Stefano, B.C.Rasco, K.P.Rykaczewski, N.T.Brewer, D.W.Stracener, Y.Liu, Z.Gai, C.Rouleau, J.Carter, J.Kostensalo, J.Suhonen, H.Davis, E.D.Lukosi, K.C.Goetz, R.K.Grzywacz, M.Mancuso, F.Petricca, A.Fijalkowska, M.Wolinska-Cichocka, J.Ninkovic, P.Lechner, R.B.Ickert, L.E.Morgan, P.R.Renne, I.Yavin, for the KDK Collaboration Evidence for ground-state electron capture of 40K RADIOACTIVITY 40K(EC); measured decay products, X-rays, Eγ, Iγ; deduced EC0/EC* relative branching ratios to the ground state and excited state of 40Ar, T1/2, decay scheme. First experimental verification of a third-forbidden unique transition. Discussed the impact of found evidence of the 40K decay to the ground-sate on the geochronology and nuclear theory. Comparison to theoretical estimations. Sensitive x-ray silicon drift detector (SDD) and Modular Total Absorption Spectrometer (MTAS).
doi: 10.1103/PhysRevC.108.014327
2023WO01 Phys.Rev. C 107, 034303 (2023) M.Wolinska-Cichocka, B.C.Rasco, K.P.Rykaczewski, N.T.Brewer, A.Fijalkowska, M.Karny, R.K.Grzywacz, K.C.Goetz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, S.Go, B.Heffron, J.Johnson, T.T.King, J.T.Matta, K.Miernik, M.Madurga, E.A.McCutchan, D.Miller, C.D.Nesaraja, S.V.Paulauskas, M.M.Rajabali, S.Taylor, A.A.Sonzogni, E.H.Wang, J.A.Winger, Y.Xiao, C.J.Zachary Complete β-decay patterns of 142Cs, 142Ba, and 142La determined using total absorption spectroscopy RADIOACTIVITY 142La, 142Ba, 142Cs(β-)[from 238U(p, F), E=40 MeV]; measured Eγ, Iγ, Eβ, Iβ, γβ-coin, total absorption spectra; deduced T1/2, average gamma energy per decay, β-feeding intensities, decay patterns, σ for the detection of reactor antineutrinos. 142Cs(β-n); deduced β-delayed neutron branching ratio. Comparison with other experimental values and ENSDF evaluation. Modular Total Absorption Spectrometer (MTAS) array of 19 NaI(Tl) coupled with auxiliary Si-strip detectors at the mass separator and Tandem accelerator at Oak Ridge National Laboratory.
doi: 10.1103/PhysRevC.107.034303
2022KI23 Astrophys.J. 936, 107 (2022) G.G.Kiss, A.Vitez-Sveiczer, Y.Saito, A.Tarifeno-Saldivia, M.Pallas, J.L.Tain, I.Dillmann, J.Agramunt, A.Algora, C.Domingo-Pardo, A.Estrade, C.Appleton, J.M.Allmond, P.Aguilera, H.Baba, N.T.Brewer, C.Bruno, R.Caballero-Folch, F.Calvino, P.J.Coleman-Smith, G.Cortes, T.Davinson, N.Fukuda, Z.Ge, S.Go, C.J.Griffin, R.K.Grzywacz, O.Hall, A.Horvath, J.Ha, L.J.Harkness-Brennan, T.Isobe, D.Kahl, T.T.King, A.Korgul, S.Kovacs, R.Krucken, S.Kubono, M.Labiche, J.Liu, J.Liang, M.Madurga, K.Miernik, F.Molina, A.I.Morales, M.R.Mumpower, E.Nacher, A.Navarro, N.Nepal, S.Nishimura, M.Piersa-Silkowska, V.Phong, B.C.Rasco, B.Rubio, K.P.Rykaczewski, J.Romero-Barrientos, H.Sakurai, L.Sexton, Y.Shimizu, M.Singh, T.Sprouse, T.Sumikama, R.Surman, H.Suzuki, T.N.Szegedi, H.Takeda, A.Tolosa, K.Wang, M.Wolinska-Cichocka, P.Woods, R.Yokoyama, Z.Xu Measuring the β-decay Properties of Neutron-rich Exotic Pm, Sm, Eu, and Gd Isotopes to Constrain the Nucleosynthesis Yields in the Rare-earth Region NUCLEAR REACTIONS 9Be(238U, X), E=345 MeV/nucleon; measured reaction products, TOF, Eβ, Iβ. 159,160,161,162,163,164,165,166Pm, 161,162,163,164,165,166,167,168Sm, 165,166,167,168,169,170Eu, 167,168,169,170,171,172Gd; deduced new isotopes T1/2 and β-delayed neutron emission probabilities, relative r-process abundance pattern for the neutron-star merger scenario. RIKEN Nishina Center, the Advanced Implantation Detector Array (AIDA) and the BRIKEN neutron detector array.
doi: 10.3847/1538-4357/ac80fc
2022OG05 Phys.Rev. C 106, 024612 (2022) Yu.Ts.Oganessian, V.K.Utyonkov, D.Ibadullayev, F.Sh.Abdullin, S.N.Dmitriev, M.G.Itkis, A.V.Karpov, N.D.Kovrizhnykh, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, R.N.Sagaidak, L.Schlattauer, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.Lindner, K.P.Rykaczewski, T.T.King, J.B.Roberto, N.T.Brewer, R.K.Grzywacz, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang Investigation of 48Ca-induced reactions with 242Pu and 238U targets at the JINR Superheavy Element Factory RADIOACTIVITY 286,287Fl, 283Cn(α), (SF)[from 242Pu(48Ca, 3n), (48Ca, 4n)286Fl/287Fl, E=242.5, 247.5 MeV, and 238U(48Ca, 3n)283Cn, E=231.1, 234.4 MeV followed by separation of fragments using gas-filled separator DGFRS-2 separator at the SHE Factory of JINR-Dubna]; measured evaporation residues (ERs), Eα, fission fragments (SF), (ER)α-coin, αα-coin, (ER)(SF)-coin using double-sided silicon strip detectors (DSSDs), single-sided silicon-strip detectors (SSSDs) and multiwire proportional chambers (MWPCs); deduced T1/2 for α and SF decays, branching ratios, Q(α), production cross sections for superheavy nuclei. 279Ds, 275Hs, 271Sg(α), (SF); 282Cn, 267Rf(SF)[from 286,287Fl, 283Cn decay chains]; measured Eα, ESF deduced T1/2 for α and SF decays, average decay properties. 287Fl; discussed possible existence of isomeric states from consecutive α decays. 282Cn; discussed possible population of 2+ state. Comparison with previously available experimental results.
doi: 10.1103/PhysRevC.106.024612
2022OG07 Phys.Rev. C 106, L031301 (2022) Yu.Ts.Oganessian, V.K.Utyonkov, N.D.Kovrizhnykh, F.Sh.Abdullin, S.N.Dmitriev, D.Ibadullayev, M.G.Itkis, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, R.N.Sagaidak, L.Schlattauer, I.V.Shirokovski, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.V.Khalkin, V.B.Zlokazov, K.P.Rykaczewski, T.T.King, J.B.Roberto, N.T.Brewer, R.K.Grzywacz, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang First experiment at the Super Heavy Element Factory: High cross section of 288Mc in the 243Am + 48Ca reaction and identification of the new isotope 264Lr NUCLEAR REACTIONS 243Am(48Ca, 2n)289Mc, (48Ca, 3n)288Mc, (48Ca, 4n), E=239.1, 240.9, 243.9 MeV; measured evaporation residues (ER), α, and fission fragments (SF), (ER)α-coin, αα-coin, α(SF)-coin, ER(SF)-coin, production σ(E) for superheavy nuclei using gas-filled separator DGFRS-2, two double-sided strip detectors (DSSD), two multiwire proportional chambers (MWPC) at the DC280 cyclotron facility of the Super Heavy Element Factory of JINR-Dubna. RADIOACTIVITY 288,289Mc, 284,285Nh, 280,281Rg, 276Mt, 272Bh, 268Db(α); 281Rg, 277Mt, 268Db, 264Lr(SF)[from 243Am(48Ca, xn)]; measured Eα, ESF, (ER)α-coin, αα-coin, α(SF)-coin, ER(SF)-coin, T1/2. 268Db; deduced α/SF branching ratio. 264Lr; deduced new isotope, T1/2, average decay properties. 288Mc, 284Nh(EC), (β+); discussed upper limit for decay mode. History of 55 correlated events observed for 288Mc and six for 289Mc is listed by authors in the Supplemental material of the paper.
doi: 10.1103/PhysRevC.106.L031301
2022OG08 Phys.Rev. C 106, 064306 (2022) Yu.Ts.Oganessian, V.K.Utyonkov, N.D.Kovrizhnykh, F.Sh.Abdullin, S.N.Dmitriev, A.A.Dzhioev, D.Ibadullayev, M.G.Itkis, A.V.Karpov, D.A.Kuznetsov, O.V.Petrushkin, A.V.Podshibiakin, A.N.Polyakov, A.G.Popeko, I.S.Rogov, R.N.Sagaidak, L.Schlattauer, V.D.Shubin, M.V.Shumeiko, D.I.Solovyev, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.Yu.Bodrov, A.V.Sabelnikov, A.V.Khalkin, K.P.Rykaczewski, T.T.King, J.B.Roberto, N.T.Brewer, R.K.Grzywacz, Z.G.Gan, Z.Y.Zhang, M.H.Huang, H.B.Yang New isotope 286Mc produced in the 243Am + 48Ca reaction NUCLEAR REACTIONS 243Am(48Ca, X)288Mc/289Mc, 243Am(48Ca, 2n), (48Ca, 3n), (48Ca, 4n), (48Ca, 5n), E=242.2, 250.8, 259.1 MeV; measured reaction products, evaporation residues (ER), Eα, Iα, fission fragments, (SF), (SF)α-coin, (ER)α-coin, αα-coin; deduced σ(E) for superheavy nuclei production. Gas-filled separator DGFRS-2 at the DC280 cyclotron (SHE Factory at JINR). Measurements with double-sided silicon strip detectors (DSSDs), single-sided silicon-strip detectors (SSSDs) and multiwire proportional chambers (MWPCs). RADIOACTIVITY 286,287,288Mc, 289Mc, 282Nh, 283Nh, 284Nh, 285Nh, 278,280Rg, 274,275,276Mt, 270,271,272Bh, 268Db(α); 279,281Rg, 266,267,268Db, 264Lr(SF) [from 243Am(48Ca, xn), E=E=242.2, 250.8, 259.1 MeV]; measured Eα, ESF; deduced T1/2. 268Db; deduced α/SF branching ratio. 286Mc; deduced new isotope. Comparison of deduced half-lives with theoretical predictions.
doi: 10.1103/PhysRevC.106.064306
2022RA11 Phys.Rev. C 105, 064301 (2022) B.C.Rasco, K.P.Rykaczewski, A.Fijalkowska, M.Karny, M.Wolinska-Cichocka, R.K.Grzywacz, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, N.T.Brewer, M.P.Cooper, K.C.Goetz, J.W.Johnson, T.King, A.Laminack, J.T.Matta, K.Miernik, M.Madurga, D.Miller, M.M.Rajabali, T.Ruland, P.Shuai, M.Stepaniuk, J.Winger Deciphering 98Nb β decay with the Modular Total Absorption Spectrometer at ORNL RADIOACTIVITY 98Nb(β-)[from decay chains of 98Rb and 98Sr produced in 238U(p, F) at HRIBF-ORNL facility]; measured Eγ, Iγ, total absorption γ-ray spectrum using NaI(Tl)-based Modular Total Absorption Spectrometer (MTAS); deduced average γ energy per β decay, and average ν-bar; discussed impact of measured β-feeding pattern on reactor decay heat calculations and predicted detection rates of reactor ν-bar. 98Zr; measured T1/2 with 98Zr and 98Nb in equilibrium, and compared with value in the ENSDF database. 98Mo; deduced levels, β feedings to the g.s. and excited states, logft, conversion electron per β decay from the E0 transition from the first excited 0+ state in 98Mo. Comparison with β feedings and average γ energy in the ENSDF and ENDF/B-VIII.0 databases, and with previous experimental results. Relevance to the study of β- decays of abundantly produced fission products in nuclear reactors.
doi: 10.1103/PhysRevC.105.064301
2022SH20 Phys.Rev. C 105, 054312 (2022) P.Shuai, B.C.Rasco, K.P.Rykaczewski, A.Fijalkowska, M.Karny, M.Wolinska-Cichocka, R.K.Grzywacz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, N.T.Brewer, S.Go, M.Cooper, K.C.Goetz, J.W.Johnson, C.U.Jost, T.T.King, J.T.Matta, J.H.Hamilton, A.Laminack, K.Miernik, M.Madurga, D.Miller, C.D.Nesaraja, S.Padgett, S.V.Paulauskas, M.M.Rajabali, T.Ruland, M.Stepaniuk, E.H.Wang, J.A.Winger Determination of β-decay feeding patterns of 88Rb and 88Kr using the Modular Total Absorption Spectrometer at ORNL HRIBF RADIOACTIVITY 88Rb(β-), 88Kr(β-)[from 238U(p, F), E=40 MeV]; measured Eγ, Iγ, Eβ, Iβ; deduced β-intensities, ground state feedings in β-decay. 88Rb; deduced T1/2. Pandemonium effect free measurements. Comparison to other experimental data. Modular Total Absorption Spectrometer (MTAS) NaI(Tl) detector array at Holifield Radioactive Ion Beam Facility (HRIBF) at the Oak Ridge National Laboratory.
doi: 10.1103/PhysRevC.105.054312
2022WU18 Phys.Rev. C 106, 064328 (2022) J.Wu, S.Nishimura, P.-A.Soderstrom, A.Algora, J.J.Liu, V.H.Phong, Y.Q.Wu, F.R.Xu, J.Agramunt, D.S.Ahn, T.A.Berry, C.G.Bruno, J.J.Bundgaard, R.Caballero-Folch, A.C.Dai, T.Davinson, I.Dillmann, A.Estrade, A.Fijalkowska, N.Fukuda, S.Go, R.K.Grzywacz, T.Isobe, S.Kubono, G.Lorusso, K.Matsui, A.I.Morales, N.Nepal, S.E.A.Orrigo, B.C.Rasco, K.P.Rykaczewski, H.Sakurai, Y.Shimizu, D.W.Stracener, T.Sumikama, H.Suzuki, J.L.Tain, H.Takeda, A.Tarifeno-Saldivia, A.Tolosa-Delgado, M.Wolinska-Cichocka, R.Yokoyama First observation of isomeric states in 111Zr, 113Nb, and 115Mo NUCLEAR REACTIONS 235U(9Be, X)111mZr/113mNb/115mMo, E=345 MeV/nucleon; measured reaction products, Eγ, Iγ, (fragment)γ-coin; deduced isomeric ratios. 111Zr, 113Nb, 115Mo; deduced isomeric states energy, transition energies. 115Mo; deduced levels, relative γ-transition intensities. Large-acceptance BigRIPS and ZeroDegree spectrometers coupled with HPGe clover-type detectors at RIBF. RADIOACTIVITY 111Zr, 113Nb, 115Mo(IT)[from 235U(9Be, X), E=345 MeV/nucleon]; measured Eγ, Iγ; deduced T1/2 for isomeric states decay, reduced transition probabilities for transitions depopulating the isomeric state by assuming different multipolarities.
doi: 10.1103/PhysRevC.106.064328
2021BA34 Phys.Rev. C 104, 024308 (2021) J.C.Batchelder, C.Apgar, N.T.Brewer, C.J.Gross, R.K.Grzywacz, S.Ilyushkin, M.Madurga, K.Miernik, S.W.Padgett, S.V.Paulauskas, W.A.Peters, B.C.Rasco, K.P.Rykaczewski, D.W.Stracener, J.A.Winger, M.Wolinska-Cichocka, E.F.Zganjar, D.W.Bardayan, M.E.Howard, B.Manning, M.Matos, A.J.Mendez, D.Miller, A.Ratkiewicz, E.H.Wang Levels in 125Cd populated by the β decay of 125mAg and 125Ag RADIOACTIVITY 125,125mAg(β-), (β-n)[from 238U(p, F), E=50 MeV from the ORIC cyclotron at the HRIBF-ORNL facility, followed by mass separation of fission fragments by a high resolution magnet]; 124Cd(β-)[from 125Cd β-n decay]; measured Eγ, Iγ, βγ- and γγ-coin, half-lives of decays of the g.s. and isomer of 125Ag, %β-n or Pn using two HPGe clover detectors for γ rays, two plastic scintillators for β particles, and 48 plastic scintillators for the detection of neutrons. 125Cd, 124In; deduced levels, J, π, multipolarity, β feedings, logft. Comparison with previously reported results.
doi: 10.1103/PhysRevC.104.024308
2021ST14 Nucl.Instrum.Methods Phys.Res. A1012, 165593 (2021) M.Stukel, B.C.Rasco, N.T.Brewer, P.C.F.Di Stefano, K.P.Rykaczewski, H.Davis, E.D.Lukosi, L.Hariasz, M.Constable, P.Davis, K.Dering, A.Fijalkowska, Z.Gai, K.C.Goetz, R.K.Grzywacz, J.Kostensalo, J.Ninkovic, P.Lechner, Y.Liu, M.Mancuso, C.L.Melcher, F.Petricca, C.Rouleau, P.Squillari, L.Stand, D.W.Stracener, J.Suhonen, M.Wolinska-Cichocka, I.Yavin A novel experimental system for the KDK measurement of the 40K decay scheme relevant for rare event searches RADIOACTIVITY 40K(EC), (β-); measured decay products, Eγ, Iγ, X-rays; deduced preliminary results for the branching ratio of the electron capture directly to the ground state of 40Ar. The KDK (Potassium (K) Decay (DK)) collaboration.
doi: 10.1016/j.nima.2021.165593
2020AH03 Phys.Rev. C 102, 035805 (2020) T.Ahn, S.Aguilar, R.J.deBoer, D.W.Bardayan, A.Boeltzig, C.R.Brune, S.P.Burcher, K.Y.Chae, S.L.Henderson, R.K.Grzywacz, K.L.Jones, J.M.Kovoor, K.T.Macon, K.Manukyan, S.Mosby, P.D.O'Malley, M.Renaud, K.Smith, C.Thornsberry, B.Vande Kolk, M.Wiescher Cross-section measurements to low-lying excited final states in the 24Mg(α, p)27Al*(γ) reaction as an energy source for x-ray bursts NUCLEAR REACTIONS 24Mg(α, p)27Al*, E=4.0-5.4 MeV; measured Eγ, Iγ, γ(θ) for γ rays emitted by resonances in 27Al using an array of 13 LaBr3 detectors from the Hybrid Array of Gamma Ray Detectors (HAGRiD) and enriched target at the ANA accelerator at the University of Notre Dame; deduced yields for resonances in 27Al, integrated angular yields for resonances in 27Al for (α, p1) and (α, p2) channels, astrophysical reaction rates from 1-10 GK. Relevance to energy production in type Ia x-ray bursts. The γ rays also seen from 24Mg(α, a°), 24Mg(α, n)20Ne, and 24Mg(α, γ)28Si.
doi: 10.1103/PhysRevC.102.035805
2019PH02 Phys.Rev. C 100, 011302 (2019) V.H.Phong, G.Lorusso, T.Davinson, A.Estrade, O.Hall, J.Liu, K.Matsui, F.Montes, S.Nishimura, A.Boso, P.H.Regan, R.Shearman, Z.Y.Xu, J.Agramunt, J.M.Allmond, D.S.Ahn, A.Algora, H.Baba, N.T.Brewer, C.G.Bruno, R.Caballero-Folch, F.Calvino, M.Wolinska-Cichocka, G.Cortes, I.Dillmann, C.Domingo-Pardo, A.Gargano, S.Go, C.J.Griffin, R.K.Grzywacz, L.Harkness-Brennan, T.Isobe, A.Jungclaus, D.Kahl, L.H.Khiem, G.Kiss, A.Korgul, S.Kubono, K.Miernik, A.I.Morales, N.Nepal, M.Piersa, Zs.Podolyak, B.C.Rasco, K.P.Rykaczewski, H.Sakurai, Y.Shimizu, D.W.Stacener, T.Sumikama, H.Suzuki, H.Takeda, J.L.Tain, A.Tarifeno-Saldivia, A.Tolosa-Delgado, V.Vaquero, P.J.Woods, R.Yokoyama, C.Yuan Observation of a 13449In85 Proton-neutron coupling "southeast" of 13250Sn82 NUCLEAR REACTIONS 9Be(238U, F)120Rh/121Rh/122Rh/123Rh/124Rh/125Rh/123Pd/124Pd/125Pd/126Pd/127Pd/128Pd/125Ag/126Ag/127Ag/128Ag/129Ag/130Ag/128Cd/129Cd/130Cd/131Cd/132Cd/133Cd/131In/132In/133In/134In/135In/136In/134Sn/135Sn/136Sn/137Sn/138Sn/139Sn/138Sb/139Sb/140Sb/141Te/142Te, E=345 MeV/nucleon; measured fission fragment yields, A/Q plot, Eγ, Iγ, (fragment)γ-coin, half-lives of isomers in 128Cd and 134In by (ion)γ(t) using BigRIPS, ZeroDegree spectrometer, and AIDA array for fragment separation and identification, and HPGe detectors for γ detection at RIBF-RIKEN. 128Cd, 130Ag, 132,134In; measured (ion)γ-coin spectra; deduced isomers in 128Cd and 134In, configurations, no evidence for isomers in 130Ag and 132In. 134In; compared Weisskopf estimated half-lives for E1, M1, E2 and M2 multipolarities for the isomeric transition in the case of bare nuclei and neutral atoms with the measured half-life, best agreement found for E2 multipolarity. 130Ag, 132,134In; calculated levels, J, π using shell model, and compared with available experimental data.
doi: 10.1103/PhysRevC.100.011302
2018BR13 Phys.Rev. C 98, 024317 (2018) N.T.Brewer, V.K.Utyonkov, K.P.Rykaczewski, Yu.Ts.Oganessian, F.Sh.Abdullin, R.A.Boll, D.J.Dean, S.N.Dmitriev, J.G.Ezold, L.K.Felker, R.K.Grzywacz, M.G.Itkis, N.D.Kovrizhnykh, D.C.McInturff, K.Miernik, G.D.Owen, A.N.Polyakov, A.G.Popeko, J.B.Roberto, A.V.Sabelnikov, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, N.J.Sims, E.H.Smith, V.G.Subbotin, A.M.Sukhov, A.I.Svirikhin, Yu.S.Tsyganov, S.M.Van Cleve, A.A.Voinov, G.K.Vostokin, C.S.White, J.H.Hamilton, M.A.Stoyer Search for the heaviest atomic nuclei among the products from reactions of mixed-Cf with a 48Ca beam NUCLEAR REACTIONS 249,250,251,252Cf(48Ca, 2n), (48Ca, 3n), (48Ca, 4n), (48Ca, 5n), E*=33-50 MeV; calculated evaporation residual cross sections using from five models for analyzing reactions. 249,250,251Cf(48Ca, xn)294Og, E=252, 258 MeV; Yb(48Ca, xn)216Th/217Th/218Th/219Th/220Th, E=252, 258 MeV; 206Pb(48Ca, 2n)252No, E=252, 258 MeV; measured Eα, Iα and (implants)α correlations, using Dubna Gas Filled Recoil Separator (DGFRS) for recoil separation and double-sided silicon strip detectors for α detection at JINR. Reviewed earlier experiments from 2002 to 2012 for the detection of 294Og nuclide. 295,296Og; predicted production σ, half-life and Eα for the decay of 296Og; discussed future prospects for production of these two nuclides. RADIOACTIVITY 294Og, 290Lv, 218,219Th, 214,215Ra(α); 286Fl(SF); measured Eα, Q(α) and T1/2. 294,296Og(α); comparison of experimental values for Q(α) and T1/2 for 294Og with theoretical predictions for 294Og and 296Og.
doi: 10.1103/PhysRevC.98.024317
2018UT02 Phys.Rev. C 97, 014320 (2018) V.K.Utyonkov, N.T.Brewer, Yu.Ts.Oganessian, K.P.Rykaczewski, F.Sh.Abdullin, S.N.Dmitriev, R.K.Grzywacz, M.G.Itkis, K.Miernik, A.N.Polyakov, J.B.Roberto, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.M.Sukhov, A.V.Karpov, A.G.Popeko, A.V.Sabelnikov, A.I.Svirikhin, G.K.Vostokin, J.H.Hamilton, N.D.Kovrizhnykh, L.Schlattauer, M.A.Stoyer, Z.Gan, W.X.Huang, L.Ma Neutron-deficient superheavy nuclei obtained in the 240Pu + 48Ca reaction NUCLEAR REACTIONS 240Pu(48Ca, 3n), (48Ca, 4n), E=250 MeV; measured evaporation residues (ER), α, and SF fragments, ER-α, α-α, and ER-SF correlated events, reaction σ using Dubna gas-filled recoil separator (DGFRS) at the U-400 cyclotron facility of Flerov Laboratory of Nuclear Reactions(FLNR), JINR; deduced three ER-α-SF correlated decay chains decaying from 285Fl to 265Rf, one ER-α-SF decay chain, and 25 short ER-SF decay chains, super-heavy nuclides (SHN). Systematics of production σ for Cf, Cm and Am isotopes in 248Cm, 249Cf(136Xe, xn), 248Cm(86Kr, xn), and 240Pu, 243Am, 248Cm(48Ca, xn) reactions. 240,244mAm, 242mAm, 237,239,241mPu, 238,241,243,244,245,246mAm, 287Fl, 282,283Cn, 279Ds; possible production of mostly the SF activities. RADIOACTIVITY 285Fl, 281Cn, 277Ds, 273Hs, 269Sg(α); 265Rf(SF)[from 240Pu(48Ca, 3n), E=250 MeV]; measured Eα, ESF, T1/2 from three correlated decay chains; deduced average decay properties, possible indication of decays through different energy levels. 284Fl(SF)[from 240Pu(48Ca, 4n), E=250 MeV]; deduced possible three ER-SF correlated decay chains and estimated half-life.
doi: 10.1103/PhysRevC.97.014320
2017KO11 Phys.Rev. C 95, 044305 (2017) A.Korgul, K.P.Rykaczewski, R.K.Grzywacz, C.R.Bingham, N.T.Brewer, C.J.Gross, C.Jost, M.Karny, M.Madurga, C.Mazzocchi, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.V.Paulauskas, M.Piersa, D.W.Stracener, M.Stryjczyk, M.Wolinska-Cichocka, E.F.Zganjar Experimental study of the β decay of the very neutron-rich nucleus 85Ge RADIOACTIVITY 85Ge(β-), (β-n)[from 238U(p, F) at HRIBF-ORNL facility]; measured Eγ, Iγ, βγ- and βγγ-coin. 85As; deduced levels, J, π, β feedings, logft. Comparison with shell-model predictions. 84As; observed γ rays from β-n decay of 85Ge. 84,85Se, 85Br; observed γ rays from daughter nuclei.
doi: 10.1103/PhysRevC.95.044305
2017MI06 Phys.Lett. B 769, 339 (2017) K.Miki, R.G.T.Zegers, Sam M.Austin, D.Bazin, B.A.Brown, A.C.Dombos, R.K.Grzywacz, M.N.Harakeh, E.Kwan, S.N.Liddick, S.Lipschutz, E.Litvinova, M.Madurga, M.T.Mustonen, W.J.Ong, S.V.Paulauskas, G.Perdikakis, J.Pereira, W.A.Peters, C.Robin, M.Scott, A.Spyrou, C.Sullivan, R.Titus Isovector excitations in 100Nb and their decays by neutron emission studied via the 100Mo(t, 3He + n) reaction at 115 MeV/ u NUCLEAR REACTIONS 100Mo(t, 3He), E=115 MeV/nucleon; measured reaction products; deduced σ(θ, E), Gamow-Teller transition strength. Comparison with the single-particle estimate and spherical pn-(R)QRPA and pn-RQTBA calculations.
doi: 10.1016/j.physletb.2017.04.004
2017RA06 Acta Phys.Pol. B48, 507 (2017) B.C.Rasco, A.Fijalkowska, K.P.Rykaczewski, M.Wolinska-Cichocka, M.Karny, R.K.Grzywacz, K.C.Goetz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, N.T.Brewer, T.King, K.Miernik, S.V.Paulauskas, M.M.Rajabali, J.A.Winger β Decays of 92Rb, 96gsY, and 142Cs Measured with the Modular Total Absorption Spectrometer and the Influence of γ Multiplicity on Total Absorption Spectrometry Measurements RADIOACTIVITY 92Rb, 96Y, 142Cs(β-); measured Eγ, Iγ, Eβ, Iβ, En, In using MTAS (Modular Total Absorption Spectrometer); deduced γ multiplicity, ν-bar energy spectrum corrections, β-feeding intensities of individual level decays to the total MTAS data. Results for ν-bar vs energy compared with 2007 ENSDF data.
doi: 10.5506/APhysPolB.48.507
2017RA10 Phys.Rev. C 95, 054328 (2017) B.C.Rasco, K.P.Rykaczewski, A.Fijalkowska, M.Karny, M.Wolinska-Cichocka, R.K.Grzywacz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Blackmon, N.T.Brewer, K.C.Goetz, J.W.Johnson, C.U.Jost, J.H.Hamilton, K.Miernik, M.Madurga, D.Miller, S.Padgett, S.V.Paulauskas, A.V.Ramayya, E.H.Spejewski Complete β-decay pattern for the high-priority decay-heat isotopes 137I and 137Xe determined using total absorption spectroscopy RADIOACTIVITY 137I, 137Xe(β-)[from U(p, F), E=50 MeV]; 137I(β-n); measured Eγ, Iγ, total absorption gamma-ray spectra using Modular Total Absorption Spectrometer (MTAS) at ORNL; deduced beta-delayed neutron spectrum, beta-delayed neutron emission probability for 137I decay, Iβ feedings, ratio of MTAS measured γ decay heat to calculated γ decay heat for thermal neutrons+235U. Comparison with the evaluated data in the ENSDF database at NNDC.
doi: 10.1103/PhysRevC.95.054328
2016KA65 Nucl.Instrum.Methods Phys.Res. A836, 83 (2016) M.Karny, K.P.Rykaczewski, A.Fijalkowska, B.C.Rasco, M.Wolinska-Cichocka, R.K.Grzywacz, K.C.Goetz, D.Miller, E.F.Zganjar Modular total absorption spectrometer RADIOACTIVITY 90Y(β-); measured decay products, Eβ, Iβ; deduced β-spectra. Comparison with GEANT4 calculations.
doi: 10.1016/j.nima.2016.08.046
2016KO24 Phys.Rev. C 93, 064324 (2016) A.Korgul, K.P.Rykaczewski, R.K.Grzywacz, C.R.Bingham, N.T.Brewer, C.J.Gross, A.A.Ciemny, C.Jost, M.Karny, M.Madurga, C.Mazzocchi, A.J.Mendez, K.Miernik, D.Miller, S.Padgett, S.V.Paulauskas, M.Piersa, D.W.Stracener, M.Stryjczyk, M.Wolinska-Cichocka, E.F.Zganjar β and β - n decay of the neutron-rich 84Ge nucleus RADIOACTIVITY 84Ge(β-), (β-n)[from 238U(p, F) using IRIS2 ion source at HRIBF-ORNL cyclotron facility]; measured Eγ, Iγ, Eβ, βγ-, βγγ-coin using detection setup at the Low-Energy Radioactive Ion Beam Spectroscopy Station (LeRIBSS). 84As; deduced levels, J, π, Iβ feedings, logft. 83As; one γ ray observed. Systematics of low-spin levels in 82Ge, 84As, 86Br, 88Rb, 90Y. Comparison with shell model calculations.
doi: 10.1103/PhysRevC.93.064324
2016RA25 Phys.Rev.Lett. 117, 092501 (2016) B.C.Rasco, M.Wolinska-Cichocka, A.Fijalkowska, K.P.Rykaczewski, M.Karny, R.K.Grzywacz, K.C.Goetz, C.J.Gross, D.W.Stracener, E.F.Zganjar, J.C.Batchelder, J.C.Blackmon, N.T.Brewer, S.Go, B.Heffron, T.King, J.T.Matta, K.Miernik, C.D.Nesaraja, S.V.Paulauskas, M.M.Rajabali, E.H.Wang, J.A.Winger, Y.Xiao, C.J.Zachary Decays of the Three Top Contributors to the Reactor ν(bar)e High-Energy Spectrum, 92Rb, 96gsY, and 142Cs, Studied with Total Absorption Spectroscopy RADIOACTIVITY 92Rb, 96Y, 142Cs(β-), (β-n) [from 238U(p, X), E=40 MeV]; measured decay products, Eγ, Iγ; deduced β-feeding intensity, impact on a reactor anti-neutrino spectrum. Comparison with available data.
doi: 10.1103/PhysRevLett.117.092501
2015UT02 Phys.Rev. C 92, 034609 (2015) V.K.Utyonkov, N.T.Brewer, Yu.Ts.Oganessian, K.P.Rykaczewski, F.Sh.Abdullin, S.N.Dmitriev, R.K.Grzywacz, M.G.Itkis, K.Miernik, A.N.Polyakov, J.B.Roberto, R.N.Sagaidak, I.V.Shirokovsky, M.V.Shumeiko, Yu.S.Tsyganov, A.A.Voinov, V.G.Subbotin, A.M.Sukhov, A.V.Sabelnikov, G.K.Vostokin, J.H.Hamilton, M.A.Stoyer, S.Y.Strauss Experiments on the synthesis of superheavy nuclei 284Fl and 285Fl in the 239, 240Pu + 48Ca reactions NUCLEAR REACTIONS 240Pu(48Ca, 3n)285Fl, E=245, 250 MeV; 240Pu(48Ca, 4n)284Fl, E=245, 250 MeV; 239Pu(48Ca, 3n)284Fl, E=245 MeV; measured evaporation residues (ER), α, and SF fragments, ER-α and ER-SF correlated events, σ using DGFRS separator at U400 cyclotron facility of FLNR-JINR. Decay studies. Super heavy nuclei. Systematics of cross sections. RADIOACTIVITY 284Fl(SF), 285Fl(α)[from 239,240Pu(48Ca, xn), E=245, 250 MeV]; 281Cn, 277Ds, 273Hs, 269Sg(α), 265Rf[from 285Fl α decay chain]; measured EER, Eα, ESF, T1/2; deduced Q(α). Systematics of SF half-lives and α-decay energies.
doi: 10.1103/PhysRevC.92.034609
2014WO01 Nucl.Data Sheets 120, 22 (2014) M.Wolinska-Cichocka, K.P.Rykaczewski, A.Fijalkowska, M.Karny, R.K.Grzywacz, C.J.Gross, J.W.Johnson, B.C.Rasco, E.F.Zganjar Modular Total Absorption Spectrometer at the HRIBF (ORNL, Oak Ridge) RADIOACTIVITY 142Ba, 142La(β-); measured decay products, Eγ, Iγ, Eβ, Iβ, β-γ-coin.; deduced discrepancy in the β feeding, level structure.
doi: 10.1016/j.nds.2014.06.131
2013OG04 Phys.Rev. C 87, 054621 (2013) Yu.Ts.Oganessian, F.Sh.Abdullin, C.Alexander, J.Binder, R.A.Boll, S.N.Dmitriev, J.Ezold, K.Felker, J.M.Gostic, R.K.Grzywacz, J.H.Hamilton, R.A.Henderson, M.G.Itkis, K.Miernik, D.Miller, K.J.Moody, A.N.Polyakov, A.V.Ramayya, J.B.Roberto, M.A.Ryabinin, K.P.Rykaczewski, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.V.Shumeiko, M.A.Stoyer, N.J.Stoyer, V.G.Subbotin, A.M.Sukhov, Yu.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin Experimental studies of the 249Bk+48Ca reaction including decay properties and excitation function for isotopes of element 117, and discovery of the new isotope 277Mt NUCLEAR REACTIONS 249Bk(48Ca, 3n), (48Ca, 4n), E=243.7, 255.7, 259.8 MeV; measured σ(E) for production of 293,294Ts using DGFRS separator at FLNR, JINR facility. Comparison with theoretical calculations. RADIOACTIVITY 293,294Ts, 289,290Mc, 285,286Nh, 281,282Rg, 278Mt, 274Bh(α)[from α decay chains of 293Ts and 294Ts formed in 249Bk(48Ca, 3n), (48Ca, 4n), E=243.7, 255.7, 259.8 MeV]; measured Eα, Iα, half-lives. 270Db, 277Mt, 281Rg(SF); measured decay energy, half-lives. 281Rg(α), (SF); measured α/SF branching ratio. 277Mt; identified new isotope. Systematics of Q(α), SF- and α-decay half-lives for isotopes in Z=104-117, N=150-177 regions.
doi: 10.1103/PhysRevC.87.054621
2012OG06 Phys.Rev.Lett. 109, 162501 (2012) Yu.Ts.Oganessian, F.Sh.Abdullin, C.Alexander, J.Binder, R.A.Boll, S.N.Dmitriev, J.Ezold, K.Felker, J.M.Gostic, R.K.Grzywacz, J.H.Hamilton, R.A.Henderson, M.G.Itkis, K.Miernik, D.Miller, K.J.Moody, A.N.Polyakov, A.V.Ramayya, J.B.Roberto, M.A.Ryabinin, K.P.Rykaczewski, R.N.Sagaidak, D.A.Shaughnessy, I.V.Shirokovsky, M.V.Shumeiko, M.A.Stoyer, N.J.Stoyer, V.G.Subbotin, A.M.Sukhov, Yu.S.Tsyganov, V.K.Utyonkov, A.A.Voinov, G.K.Vostokin Production and Decay of the Heaviest Nuclei 293, 294117 and 294118 NUCLEAR REACTIONS 249Bk(48Ca, X)293Ts/294Ts, E=247, 252 MeV; 249Cf(48Ca, 3n)294Og, E=245, 251 MeV; measured reaction products, Eα, Iα; deduced average σ, T1/2. Comparison with available data. RADIOACTIVITY 294Og, 293,294Ts, 290Lv, 289,290Mc(α), 286Fl(α), (SF), 285,286Nh(α), 282Cn(SF), 281Rg(SF), 282Rg(α), 278Mt, 274Bh(α), 270Db(SF); measured decay products, Eα, Iα; deduced discovery z=117 element, T1/2, decay branch, Q-values. Comparison with available data.
doi: 10.1103/PhysRevLett.109.162501
2010DA17 Phys.Rev.Lett. 105, 162502 (2010) I.G.Darby, R.K.Grzywacz, J.C.Batchelder, C.R.Bingham, L.Cartegni, C.J.Gross, M.Hjorth-Jensen, D.T.Joss, S.N.Liddick, W.Nazarewicz, S.Padgett, R.D.Page, T.Papenbrock, M.M.Rajabali, J.Rotureau, K.P.Rykaczewski Orbital Dependent Nucleonic Pairing in the Lightest Known Isotopes of Tin RADIOACTIVITY 109Xe, 105Te(α); measured Iα, Eα, Iγ, Iγ; deduced J, π for ground and first excited states in 101Sn, ground state spin inversion, strong pairing interaction. Comparison with shell model calculations.
doi: 10.1103/PhysRevLett.105.162502
2009GR06 Acta Phys.Pol. B40, 447 (2009) C.J.Gross, J.A.Winger, S.V.Ilyushkin, K.P.Rykaczewski, S.N.Liddick, I.G.Darby, R.K.Grzywacz, C.R.Bingham, D.Shapira, C.Mazzocchi, S.Padgett, M.M.Rajabali, L.Cartegni, E.F.Zganjar, A.Piechaczek, J.C.Batchelder, J.H.Hamilton, C.T.Goodin, A.Korgul, W.Krolas Decay Spectroscopy of 75-79Cu, 79-81Zn and 83-85Ga RADIOACTIVITY 75,76,77,78,79Cu, 79,80,81Zn, 83,84,85Ga(β-); measured Eγ, Iγ; deduced level scheme, Jπ.
2008KA16 Phys.Lett. B 664, 52 (2008) M.Karny, K.P.Rykaczewski, R.K.Grzywacz, J.C.Batchelder, C.R.Bingham, C.Goodin, C.J.Gross, J.H.Hamilton, A.Korgul, W.Krolas, S.N.Liddick, K.Li, K.H.Maier, C.Mazzocchi, A.Piechaczek, K.Rykaczewski, D.Schapira, D.Simpson, M.N.Tantawy, J.A.Winger, C.H.Yu, E.F.Zganjar, N.Nikolov, J.Dobaczewski, A.T.Kruppa, W.Nazarewicz, M.V.Stoitsov Shell structure beyond the proton drip line studied via proton emission from deformed 141Ho RADIOACTIVITY 141Ho(p) [from 92Mo(54Fe, X), E=290, 300 MeV]; measured Ep, Ip, T1/2.
doi: 10.1016/j.physletb.2008.04.056
2008KO04 Phys.Rev. C 77, 034301 (2008) A.Korgul, K.P.Rykaczewski, C.J.Gross, R.K.Grzywacz, S.N.Liddick, C.Mazzocchi, J.C.Batchelder, C.R.Bingham, I.G.Darby, C.Goodin, J.H.Hamilton, J.K.Hwang, S.V.Ilyushkin, W.Krolas, J.A.Winger Toward 100Sn: Studies of excitation functions for the reaction between 58Ni and 54Fe ions NUCLEAR REACTIONS 54Fe(58Ni, 2n), (58Ni, 3n), (58Ni, 4n), (58Ni, np), (58Ni, 2np), (58Ni, 3np), (58Ni, n2p), (58Ni, 2n2p), E=195-265 MeV; measured σ, reaction yields. Deduced optimum energy for the production of 108Xe.
doi: 10.1103/PhysRevC.77.034301
2005GR31 Eur.Phys.J. A 25, Supplement 1, 115 (2005) C.J.Gross, K.P.Rykaczewski, D.Shapira, J.A.Winger, J.C.Batchelder, C.R.Bingham, R.K.Grzywacz, P.A.Hausladen, W.Krolas, C.Mazzocchi, A.Piechaczek, E.F.Zganjar A novel way of doing decay spectroscopy at a radioactive ion beam facility
doi: 10.1140/epjad/i2005-06-028-x
2005WI18 J.Res.Natl.Inst.Stand.Technol. 110, 389 (2005) W.S.Wilburn, J.D.Bowman, G.S.Mitchell, J.M.O'Donnell, S.I.Penttila, P.-N.Seo, J.R.Calarco, F.W.Hersmann, T.E.Chupp, T.V.Cianciolo, K.P.Rykaczewski, G.R.Young, R.T.De Souza, W.M.Snow, D.Desai, G.L.Greene, R.K.Grzywacz, E.Frlez, D.Pocanic, T.R.Gentile, V.Gudkov, G.L.Jones Measurement of Neutron Decay Parameters-The abBA Experiment
doi: 10.6028/jres.110.058
2003KA04 Phys.Rev.Lett. 90, 012502 (2003) M.Karny, R.K.Grzywacz, J.C.Batchelder, C.R.Bingham, C.J.Gross, K.Hagino, J.H.Hamilton, Z.Janas, W.D.Kulp, J.W.McConnell, M.Momayezi, A.Piechaczek, K.P.Rykaczewski, P.A.Semmes, M.N.Tantawy, J.A.Winger, C.H.Yu, E.F.Zganjar Fine Structure in Proton Emission from 145Tm Discovered with Digital Signal Processing RADIOACTIVITY 145Tm(p) [from 92Mo(58Ni, 4np)]; measured Ep, T1/2; deduced fine structure in proton decay, branching ratio. 144Er deduced level, J, π, deformation. 145Tm deduced configuration. Digital signal processing. Particle-core vibration coupling model analysis.
doi: 10.1103/PhysRevLett.90.012502
2001RY01 Nucl.Phys. A682, 270c (2001) K.P.Rykaczewski, R.K.Grzywacz, M.Karny, J.W.McConnell, M.Momayezi, J.Wahl, Z.Janas, J.C.Batchelder, C.R.Bingham, D.Hartley, M.N.Tantawy, C.J.Gross, T.N.Ginter, J.H.Hamilton, W.D.Kulp, M.Lipoglavsek, A.Piechaczek, E.F.Zganjar, W.B.Walters, J.A.Winger Towards Digital Spectroscopy of Proton Emitters RADIOACTIVITY 145,146,146mTm(p); measured proton spectra. 145Er, 146Tm deduced levels, possible J, π, configurations. Mass-separated sources.
doi: 10.1016/S0375-9474(00)00650-3
2001RY02 Acta Phys.Pol. B32, 971 (2001) K.P.Rykaczewski, J.C.Batchelder, C.R.Bingham, T.N.Ginter, C.J.Gross, R.K.Grzywacz, J.H.Hamilton, D.J.Hartley, Z.Janas, M.Karny, W.D.Kulp, M.Lipoglavsek, J.W.McConnell, M.Momayezi, A.Piechaczek, M.N.Tantawy, J.Wahl, W.B.Walters, J.A.Winger, E.F.Zganjar Fine Studies of Proton Radioactivity with Digital Signal Processing RADIOACTIVITY 145,146,146mTm(p) [from 92Mo(58Ni, xnp)]; measured Ep, T1/2. 144,145Er, 145,146Tm deduced levels, J, π, configurations. Mass-separated sources.
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