NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = H.Jayatissa Found 27 matches. 2023CA13 Phys.Rev. C 108, 035807 (2023) L.Canete, D.T.Doherty, G.Lotay, D.Seweryniak, C.M.Campbell, M.P.Carpenter, W.N.Catford, K.A.Chipps, J.Henderson, R.G.Izzard, R.V.F.Janssens, H.Jayatissa, J.Jose, A.R.L.Kennington, F.G.Kondev, A.Korichi, T.Lauritsen, C.Muller-Gatermann, C.Paxman, Zs.Podolyak, B.J.Reed, P.H.Regan, W.Reviol, M.Siciliano, G.L.Wilson, R.Yates, S.Zhu Confirmation of a new resonance in 26Si and contribution of classical novae to the galactic abundance of 26Al
doi: 10.1103/PhysRevC.108.035807
2023HE08 J.Phys.(London) G50, 060501 (2023) C.Hebborn, F.M.Nunes, G.Potel, W.H.Dickhoff, J.W.Holt, M.C.Atkinson, R.B.Baker, C.Barbieri, G.Blanchon, M.Burrows, R.Capote, P.Danielewicz, M.Dupuis, C.Elster, J.E.Escher, L.Hlophe, A.Idini, H.Jayatissa, B.P.Kay, K.Kravvaris, J.J.Manfredi, A.Mercenne, B.Morillon, G.Perdikakis, C.D.Pruitt, G.H.Sargsyan, I.J.Thompson, M.Vorabbi, T.R.Whitehead Optical potentials for the rare-isotope beam era
doi: 10.1088/1361-6471/acc348
2023JA08 Phys.Rev.Lett. 845, 112701 (2023) H.Jayatissa, M.L.Avila, K.E.Rehm, P.Mohr, Z.Meisel, J.Chen, C.R.Hoffman, J.Liang, C.Muller-Gatermann, D.Neto, W.J.Ong, A.Psaltis, D.Santiago-Gonzalez, T.L.Tang, C.Ugalde, G.Wilson Study of the 22Mg Waiting Point Relevant for X-Ray Burst Nucleosynthesis via the 22Mg(α, p)25Al Reaction NUCLEAR REACTIONS 4He(22Mg, p), E=74 MeV; measured reaction products, Ep, Ip; deduced σ, reaction rates. Comparison with calculations. MUlti-Sampling Ionization Chamber (MUSIC) detector, the Argonne Tandem Linac Accelerator System (ATLAS) at Argonne National Laboratory.
doi: 10.1103/PhysRevLett.131.112701
2022BA39 Phys.Rev. C 106, 054310 (2022) M.Barbui, A.Volya, E.Aboud, S.Ahn, J.Bishop, V.Z.Goldberg, J.Hooker, C.H.Hunt, H.Jayatissa, Tz.Kokalova, E.Koshchiy, S.Pirrie, E.Pollacco, B.T.Roeder, A.Saastamoinen, S.Upadhyayula, C.Wheldon, G.V.Rogachev α-cluster structure of 18Ne NUCLEAR REACTIONS 4He(14O, α), E=61.8 MeV; measured reaction product, Eα, Iα, angular distribution; deduced σ(θ), excitation function of 18Ne. 18Ne; deduced resonances J, π, resonance total and partial widths. 18Ne, O; calculated levels J, π. Analysis with a multichannel R-matrix approach. Shell model with FSU interaction Hamiltonian calculations. Comparison with other experimental data. TexAT active target at magnetic achromat recoil separator (Cyclotron Institute at Texas AM University).
doi: 10.1103/PhysRevC.106.054310
2022BU13 Phys.Rev. C 105, 045805 (2022) S.Burcher, K.A.Chipps, R.O.Hughes, C.S.Reingold, A.Saastamoinen, J.T.Harke, N.Cooper, S.Ahn, J.M.Allmond, H.Clark, J.A.Cizewski, M.R.Hall, J.Hooker, H.Jayatissa, K.L.Jones, S.Ota, S.D.Pain, K.Schmidt, A.Simon, S.Upadhyayula Developing the32S(p, d)31S*(p)(γ) reaction to probe the 30P(p, γ)31S reaction rate in classical novae NUCLEAR REACTIONS 32S(p, d), E=33 MeV; measured reaction products, Ep, Ip, Eγ, Iγ, deuteron spectra, (deuteron)p-coin, (particle)γ-coin, angular distributions; deduced s(θ). 31S; deduced levels, J, π, proton decay width of excited states, proton decay branching ratios. DWBA analysis. Comparison to other experimental data. Discussed relevance to resonances investigations in astrophysically important 30P(p, γ) reaction. Hyperion setup consisting of 12 Compton-suppressed HPGe clover detectors, a silicon telescope downstream of the target, and a single silicon detector upstream of the target at K150 cyclotron (Texas A-M Cyclotron Institute).
doi: 10.1103/PhysRevC.105.045805
2022CH55 Phys.Rev. C 106, 064312 (2022) J.Chen, B.P.Kay, T.L.Tang, I.A.Tolstukhin, C.R.Hoffman, H.Li, P.Yin, X.Zhao, P.Maris, J.P.Vary, G.Li, J.L.Lou, M.L.Avila, Y.Ayyad, S.Bennett, D.Bazin, J.A.Clark, S.J.Freeman, H.Jayatissa, C.Muller-Gatermann, A.Munoz-Ramos, D.Santiago-Gonzalez, D.K.Sharp, A.H.Wuosmaa, C.X.Yuan Probing the quadrupole transition strength of 15C via deuteron inelastic scattering NUCLEAR REACTIONS 1H(15C, p), 2H(15C, d);E=7.1 MeV/nucleon; measured reaction products, Ep, Ip, deuteron spectrum; deduced elastic and inelastic scattering σ(θ). 15C; deduced B(E2), proton quadrupole matrix element, ratio of neutron and proton matrix elements, proton deformation length, core polarization parameters, neutron effective charge; calculated levels, J, π, B(E2), magnetic dipole moments. Comparison to data on 17O and other C isotopes. Ab initio no-core configuration interaction (NCCI) calculations with Daejeon16 interaction. HELIOS spectrometer at ATLAS in-flight facility (Argonne National Laboratory).
doi: 10.1103/PhysRevC.106.064312
2022CI04 Phys.Rev. C 106, 014317 (2022) A.A.Ciemny, C.Mazzocchi, W.Dominik, A.Fijalkowska, J.Hooker, C.Hunt, H.Jayatissa, L.Janiak, G.Kaminski, E.Koshchiy, M.Pfutzner, M.Pomorski, B.Roeder, G.V.Rogachev, A.Saastamoinen, S.Sharma, N.Sokolowska, W.Satula, J.Singh β-delayed charged-particle decay of 22, 23Si RADIOACTIVITY 22,23Si(β+), (β+p), (β+2p); 23Si(β+3p), (β+α)[22,23Si activities from Ni(28Si, X), E=45 MeV/nucleon at the Texas A and M University K500 superconducting cyclotron, followed by separation of fragments using momentum achromat recoil separator (MARS)]; measured reaction fragments, particle spectra, E(p), I(p) using optical-readout time-projection chamber (OTPC). 23Al, 22Mg, 21Na; deduced levels, J, π. 22Si, 23Si; deduced T1/2 of ground states, and absolute branching ratios for the observed decay modes; calculated Gamow-Teller matrix elements using angular-momentum-projected (AMP) method with DFT-NCCI module. 23Al; calculated levels, J, π using multireference density-functional-rooted (DFT) calculations, and compared with shell-model calculations in literature. Comparison with previous experimental results.
doi: 10.1103/PhysRevC.106.014317
2022HO08 Nucl.Instrum.Methods Phys.Res. A1032, 166612 (2022) C.R.Hoffman, T.L.Tang, M.Avila, Y.Ayyad, K.W.Brown, J.Chen, K.A.Chipps, H.Jayatissa, B.P.Kay, C.Muller-Gatermann, H.J.Ong, J.Song, G.L.Wilson In-flight production of an isomeric beam of 16N NUCLEAR REACTIONS 2H(15N, p)16N, E=8.1, 13.5 MeV/nucleon; measured reaction products, Eγ, Iγ; deduced isomer fraction. Argonne Tandem Linear Accelerator System (ATLAS) in-flight system.
doi: 10.1016/j.nima.2022.166612
2022HU21 Phys.Rev. C 106, L061301 (2022) T.Huang, D.Seweryniak, B.B.Back, P.C.Bender, M.P.Carpenter, P.Chowdhury, R.M.Clark, P.A.Copp, X.-T.He, R.D.Herzberg, D.E.M.Hoff, H.Jayatissa, T.L.Khoo, F.G.Kondev, G.Morgan, C.Morse, A.Korichi, T.Lauritsen, C.Muller-Gatermann, D.H.Potterveld, W.Reviol, A.M.Rogers, S.Saha, G.Savard, K.Sharma, S.Stolze, S.Waniganeththi, G.L.Wilson, J.Wu, Y.-F.Xu, S.Zhu Discovery of the new isotope 251Lr: Impact of the hexacontetrapole deformation on single-proton orbital energies near the Z=100 deformed shell gap NUCLEAR REACTIONS 203Tl(50Ti, 2n)251Lr, 205Tl(50Ti, 2n)253Lr, E=237 MeV; measured reaction products, α-decay of the reaction products, Eα, Iα. 251,253Lr; deduced levels J, π, α-decay width. 251,253,255Lr; calculated single-proton levels near the Fermi surface. Calculations with particle-number conserving cranked shell model. Beam delivered to target by ATLAS linear accelerator and recoiling reaction products were separated in the Argonne Gas-Filled Analyzer (AGFA) at (ANL). Decay of the implanted reaction products was measured in pixelized double-sided Si strip detector (DSSD). RADIOACTIVITY 251,253Lr(α)[from 203,205Tl(50Ti, 2n), E=237 MeV]; measured Eα, Iα; deduced T1/2, Q-value, α-decay branchings and widths. Comparison to other experimental data. and predictions of theoretical models.
doi: 10.1103/PhysRevC.106.L061301
2022JA08 Phys.Rev. C 105, L042802 (2022) H.Jayatissa, M.L.Avila, K.E.Rehm, R.Talwar, P.Mohr, K.Auranen, J.Chen, D.A.Gorelov, C.R.Hoffman, C.L.Jiang, B.P.Kay, S.A.Kuvin, D.Santiago-Gonzalez First direct measurement of the 13N(α, p)16O reaction relevant for core-collapse supernovae nucleosynthesis NUCLEAR REACTIONS 4He(13N, p), E=34.6 MeV; measured energies and yields of reaction products; deduced σ(Ε) in the range E(cm)=3.26–6.02 MeV, astrophysical S-factor. 4He(13N, p), T=0.8-10.0 GK; deduced astrophysical reaction rates. Comparison to other experimental data, TALYS calculations and data from REACLIB. MUlti-Sampling Ionization Chamber (MUSIC) detector filled with He-Kr gas mixture at ATLAS (ANL).
doi: 10.1103/PhysRevC.105.L042802
2022KA36 Phys.Rev.Lett. 129, 152501 (2022) B.P.Kay, T.L.Tang, I.A.Tolstukhin, G.B.Roderick, A.J.Mitchell, Y.Ayyad, S.A.Bennett, J.Chen, K.A.Chipps, H.L.Crawford, S.J.Freeman, K.Garrett, M.D.Gott, M.R.Hall, C.R.Hoffman, H.Jayatissa, A.O.Macchiavelli, P.T.MacGregor, D.K.Sharp, G.L.Wilson Quenching of Single-Particle Strength in A = 15 Nuclei NUCLEAR REACTIONS 2H(14C, p), (14N, p), E=10 MeV/nucleon; measured reaction products, Ep, Ip. 15C, 15N; deduced σ(θ), Q-value, the difference between the neutron and proton separation energies, degree of quenching. Comparison with the independent single-particle and shell model calculations. The HELIOS spectrometer at the ATLAS facility at Argonne National Laboratory.
doi: 10.1103/PhysRevLett.129.152501
2022SA20 Phys.Lett. B 829, 137059 (2022) M.Saxena, W.-J.Ong, Z.Meisel, D.E.M.Hoff, N.Smirnova, P.C.Bender, S.P.Burcher, M.P.Carpenter, J.J.Carroll, A.Chester, C.J.Chiara, R.Conaway, P.A.Copp, B.P.Crider, J.Derkin, A.Estrae, G.Hamad, J.T.Harke, R.Jain, H.Jayatissa, S.N.Liddick, B.Longfellow, M.Mogannam, F.Montes, N.Nepal, T.H.Ogunbeku, A.L.Richard, H.Schatz, D.Soltesz, S.K.Subedi, I.Sultana, A.S.Tamashiro, V.Tripathi, Y.Xiao, R.Zink 57Zn β-delayed proton emission establishes the 56Ni rp-process waiting point bypass RADIOACTIVITY 57Zn(β+p), (β+) [from 9Be(78Kr, X)57Zn, E=150 MeV/nucleon]; measured decay products, Eγ, Iγ, Eβ, Iβ, Ep, Ip; deduced T1/2, βp branching ratio, β-γ-p decay mode transitions. The Coupled Cyclotron Facility of NSCL.
doi: 10.1016/j.physletb.2022.137059
2022SC17 J.Phys.(London) G49, 110502 (2022) H.Schatz, A.D.Becerril Reyes, A.Best, E.F.Brown, K.Chatziioannou, K.A.Chipps, C.M.Deibel, R.Ezzeddine, D.K.Galloway, C.J.Hansen, F.Herwig, A.P.Ji, M.Lugaro, Z.Meisel, D.Norman, J.S.Read, L.F.Roberts, A.Spyrou, I.Tews, F.X.Timmes, C.Travaglio, N.Vassh, C.Abia, P.Adsley, S.Agarwal, M.Aliotta, W.Aoki, A.Arcones, A.Aryan, A.Bandyopadhyay, A.Banu, D.W.Bardayan, J.Barnes, A.Bauswein, T.C.Beers, J.Bishop, T.Boztepe, B.Cote, M.E.Caplan, A.E.Champagne, J.A.Clark, M.Couder, A.Couture, S.E.de Mink, S.Debnath, R.J.deBoer, J.den Hartogh, P.Denissenkov, V.Dexheimer, I.Dillmann, J.E.Escher, M.A.Famiano, R.Farmer, R.Fisher, C.Frohlich, A.Frebel, C.Fryer, G.Fuller, A.K.Ganguly, S.Ghosh, B.K.Gibson, T.Gorda, K.N.Gourgouliatos, V.Graber, M.Gupta, W.C.Haxton, A.Heger, W.R.Hix, W.C.G.Ho, E.M.Holmbeck, A.A.Hood, S.Huth, G.Imbriani, R.G.Izzard, R.Jain, H.Jayatissa, Z.Johnston, T.Kajino, A.Kankainen, G.G.Kiss, A.Kwiatkowski, M.La Cognata, A.M.Laird, L.Lamia, P.Landry, E.Laplace, K.D.Launey, D.Leahy, G.Leckenby, A.Lennarz, B.Longfellow, A.E.Lovell, W.G.Lynch, S.M.Lyons, K.Maeda, E.Masha, C.Matei, J.Merc, B.Messer, F.Montes, A.Mukherjee, M.R.Mumpower, D.Neto, B.Nevins, W.G.Newton, L.Q.Nguyen, K.Nishikawa, N.Nishimura, F.M.Nunes, E.O'Connor, B.W.O'Shea, W.-J.Ong, S.D.Pain, M.A.Pajkos, M.Pignatari, R.G.Pizzone, V.M.Placco, T.Plewa, B.Pritychenko, A.Psaltis, D.Puentes, Y.-Z.Qian, D.Radice, D.Rapagnani, B.M.Rebeiro, R.Reifarth, A.L.Richard, N.Rijal, I.U.Roederer, J.S.Rojo, J.S K, Y.Saito, A.Schwenk, M.L.Sergi, R.S.Sidhu, A.Simon, T.Sivarani, A.Skuladottir, M.S.Smith, A.Spiridon, T.M.Sprouse, S.Starrfield, A.W.Steiner, F.Strieder, I.Sultana, R.Surman, T.Szucs, A.Tawfik, F.Thielemann, L.Trache, R.Trappitsch, M.B.Tsang, A.Tumino, S.Upadhyayula, J.O.Valle Martinez, M.Van der Swaelmen, C.Viscasillas Vazquez, A.Watts, B.Wehmeyer, M.Wiescher, C.Wrede, J.Yoon, R.G.T.Zegers, M.A.Zermane, M.Zingale, the Horizon 2020 Collaborations Horizons: nuclear astrophysics in the 2020s and beyond
doi: https://dx.doi.org/10.1088/1361-6471/ac8890
2022TA07 Phys.Rev. C 105, 064307 (2022) T.L.Tang, C.R.Hoffman, B.P.Kay, I.A.Tolstukhin, S.Almaraz-Calderon, B.W.Asher, M.L.Avila, Y.Ayyad, K.W.Brown, D.Bazin, J.Chen, K.A.Chipps, P.A.Copp, M.Hall, H.Jayatissa, H.J.Ong, D.Santiago-Gonzalez, D.K.Sharp, J.Song, S.Stolze, G.L.Wilson, J.Wu Experimental study of the isomeric state in 16N using the 16Ng, m(d, 3He) reaction NUCLEAR REACTIONS 2H(16N, 3He), (16mN, 3He), E=11.8 MeV/nucleon, [secondary 16N mixed beam of ground state and the isomeric state produced in 2H(15N, 16N) primary reaction at ATLAS-ANL facility]; measured reaction products, 3He spectra, (recoils)(3He)-coin, angular distributions using HELIOS spectrometer. 15C; deduced levels, J, π, spectroscopic factors, DWBA calculations. 16mN; deduced neutron-halo of the isomeric state. Comparison with Woods-Saxon potential model calculations.
doi: 10.1103/PhysRevC.105.064307
2021AD01 Phys.Rev. C 103, 015805 (2021) P.Adsley, U.Battino, A.Best, A.Caciolli, A.Guglielmetti, G.Imbriani, H.Jayatissa, M.La Cognata, L.Lamia, E.Masha, C.Massimi, S.Palmerini, A.Tattersall, R.Hirschi Reevaluation of the 22Ne(α, γ)26Mg and 22Ne(α, n)25Mg reaction rates NUCLEAR REACTIONS 22Ne(α, γ); 25Mg(n, γ); 22Ne(6Li, d); 26Mg(γ, γ'), (p, p'), (d, d'), (α, α'); 11B(16O, p); evaluated experimental data. 26Mg; evaluated nuclear data for levels, resonances, J, π, resonance energies and resonance strengths for (α, γ) and (α, n) reactions, Γα, Γp, Γn. 22Ne(α, γ)26Mg, T=0.010-1.250 GK; 22Ne(α, n)25Mg, T=0.030-1.250 GK; recommended reaction rates, ratios of reaction rates, based on present evaluation and using different statistical methods. Comparison with theoretical predictions. Relevance to weak s process in evolved massive stars and in the helium flash in low-mass AGB stars.
doi: 10.1103/PhysRevC.103.015805
2021BI06 Phys.Rev. C 103, L051303 (2021) J.Bishop, G.V.Rogachev, S.Ahn, E.Aboud, M.Barbui, A.Bosh, J.Hooker, C.Hunt, H.Jayatissa, E.Koshchiy, R.Malecek, S.T.Marley, M.Munch, E.C.Pollacco, C.D.Pruitt, B.T.Roeder, A.Saastamoinen, L.G.Sobotka, S.Upadhyayula Evidence against the Efimov effect in 12C from spectroscopy and astrophysics RADIOACTIVITY 12N(β+); 12B(β-); measured β-delayed charged particles, Eα, Iα from the decay of 40-MeV 12N beam stopped inside the active-area of the TexAT (Texas Active target) TPC (Time Projection Chamber), Eγ, Iγ, γγ-coin from the decay of 12B using Gammasphere array at ANL. 12C; deduced no evidence for an hypothetical state predicted by Efimov effect at 7.458 MeV from a combined analysis of the two experiments involving charged-particle spectroscopy at Texas A and M, and γ-ray measurements at ANL, along with astrophysical rate calculations. Relevance to rate required for stars to undergo the red giant phase.
doi: 10.1103/PhysRevC.103.L051303
2021LI22 Phys.Rev. C 103, 044613 (2021) R.Linares, M.Sinha, E.N.Cardozo, V.Guimaraes, G.V.Rogachev, J.Hooker, E.Koshchiy, T.Ahn, C.Hunt, H.Jayatissa, S.Upadhyayula, B.Roeder, A.Saastomoinen, J.Lubian, M.Rodriguez-Gallardo, J.Casal, K.C.C.Pires, M.Assuncao, Y.Penionzhkevich, S.Lukyanov Elastic scattering measurements for the 10C+ 208Pb system at Elab = 66 MeV NUCLEAR REACTIONS 208Pb(10C, 10C), E=66 MeV, [10C secondary beam from 1H(10B, 10C), E=9.6 MeV/nucleon primary reaction, followed by selection of 10C beam by the Momentum Achromatic Recoil Spectrometer (MARS) at the K500 superconducting Cyclotron Institute of Texas A and M University]; measured elastically scattered 10C ions, angular distribution of scattered 10C, total σ using ΔE-E telescope of double-sided silicon strip detectors (DSSSDs); deduced suppression of the Fresnel peak. Comparison with optical model, coupled channels, and 3-body and 4-body continuum-discretized coupled-channels (CDCC) calculations using 9B+p, 6Be+α, and 8Be+p+p cluster configurations of 10C with a Brunnian (super-Borromean) structure; analyzed reaction cross sections in literature for the several projectiles on 208Pb target.
doi: 10.1103/PhysRevC.103.044613
2021OT02 Phys.Rev. C 104, 055806 (2021) S.Ota, G.Christian, W.N.Catford, G.Lotay, M.Pignatari, U.Battino, E.A.Bennett, S.Dede, D.T.Doherty, S.Hallam, F.Herwig, J.Hooker, C.Hunt, H.Jayatissa, A.Matta, M.Moukaddam, E.Rao, G.V.Rogachev, A.Saastamoinen, D.Scriven, J.A.Tostevin, S.Upadhyayula, R.Wilkinson (6Li, d) and (6Li, t) reactions on 22Ne and implications for s-process nucleosynthesis NUCLEAR REACTIONS 6Li(22Ne, d)26Mg, 6Li(22Na, t)25Mg, E=154 MeV; 2H(22Ne, p)23Ne, E not given; measured reaction products, E(d), I(d), E(p), I(p), Eγ, Iγ, 26Mg and 25Mg recoils, (26Mg)γ-coin, (25Mg)γ-coin, (particle)(particle)-coin, σ(θ) using TIARA Si detector array of two sets of Si detectors, 'Hyball' and 'Barrel', MDM high-resolution and broad range magnetic spectrometer, and array of four HPGe detectors at the K150 cyclotron of Texas A and M University. 23Ne, 25Mg, 26Mg; deduced levels, J, π, resonances, resonances in the Gamow window of 22Ne(α, n)25Mg reaction, spectroscopic factors, α-spectroscopic factors for 26Mg, resonance strengths, impact of 22Ne+α resonances on s-process nucleosynthesis; comparison of σ(θ) data with DWBA calculations using FRESCO code. Comparison with previous experimental results. 22Ne(α, n), (α, γ); calculated s-process overproduction factors in stars 3 and 5 times the mass of the sun for A=60-210 isotopes.
doi: 10.1103/PhysRevC.104.055806
2021ZA03 Phys.Lett. B 816, 136256 (2021) J.C.Zamora, V.Guimaraes, G.V.Rogachev, S.Ahn, J.Lubian, E.N.Cardozo, E.Aboud, M.Assuncao, M.Barbui, J.Bishop, A.Bosh, J.Hooker, C.Hunt, H.Jayatissa, E.Koshchiy, S.Lukyanov, R.O'Dwyer, Y.Penionzhkevich, B.T.Roeder, A.Saastamoinen, S.Upadhyayula Direct fusion measurement of the 8B proton-halo nucleus at near-barrier energies NUCLEAR REACTIONS 40Ar(8B, X), E=5.1 MeV/nucleon; measured reaction products; deduced fusion σ, barrier parameters. Universal Fusion Function (UFF) parameterization, comparison with available data.
doi: 10.1016/j.physletb.2021.136256
2020BI11 Phys.Rev. C 102, 041303 (2020) J.Bishop, G.V.Rogachev, S.Ahn, E.Aboud, M.Barbui, A.Bosh, C.Hunt, H.Jayatissa, E.Koshchiy, R.Malecek, S.T.Marley, E.C.Pollacco, C.D.Pruitt, B.T.Roeder, A.Saastamoinen, L.G.Sobotka, S.Upadhyayula Almost medium-free measurement of the Hoyle state direct-decay component with a TPC RADIOACTIVITY 12N(β+), (β+α)[from 3He(10B, 12N), E=11 MeV/nucleon at K500 cyclotron at the Cyclotron Institute at Texas A and M University, followed by isotopic separation using Momentum Achromatic Recoil Spectrometer]; measured β-delayed charged-particles using Texas active target time-projection chamber (TPC). 12C; deduced upper limit for the nonsequential component of the decay of the excited 0+, Hoyle state in an almost medium-free reaction. Comparison with previous experimental results, and with predictions from Faddeev calculations.
doi: 10.1103/PhysRevC.102.041303
2020BI15 Nucl.Instrum.Methods Phys.Res. A964, 163773 (2020) J.Bishop, G.V.Rogachev, S.Ahn, E.Aboud, M.Barbui, P.Baron, A.Bosh, E.Delagnes, J.Hooker, C.Hunt, H.Jayatissa, E.Koshchiy, R.Malecek, S.T.Marley, R.O'Dwyer, E.C.Pollacco, C.Pruitt, B.T.Roeder, A.Saastamoinen, L.G.Sobotka, S.Upadhyayula Beta-delayed charged-particle spectroscopy using TexAT RADIOACTIVITY 12N(IT), (EC), 12C(3α), 8Be(2α) [from 3He(10B, n)12N, E=11 MeV/nucleon]; measured decay products, Eα, Iα; deduced branching ratio of 12N to states in 12C above the 3-α threshold, the total branching ratio to the Hoyle state, 12N T1/2 using the β-delayed charged-particle-decay. Comparison with available data.
doi: 10.1016/j.nima.2020.163773
2020JA02 Phys.Lett. B 802, 135267 (2020) H.Jayatissa, G.V.Rogachev, V.Z.Goldberg, E.Koshchiy, G.Christian, J.Hooker, S.Ota, B.T.Roeder, A.Saastamoinen, O.Trippella, S.Upadhyayula, E.Uberseder Constraining the 22Ne(α, γ))26Mg and 22Ne(α, n)25Mg reaction rates using sub-Coulomb α-transfer reactions NUCLEAR REACTIONS 6Li(22Ne, d), E(cm)=4.6 MeV; 6Li(22Ne, t), E(cm)=5.3 MeV; measured reaction products; deduced excitation energies, σ, resonance parameters, astrophysical rates.
doi: 10.1016/j.physletb.2020.135267
2020OT01 Phys.Lett. B 802, 135256 (2020) S.Ota, G.Christian, G.Lotay, W.N.Catford, E.A.Bennett, S.Dede, D.T.Doherty, S.Hallam, J.Hooker, C.Hunt, H.Jayatissa, A.Matta, M.Moukaddam, G.V.Rogachev, A.Saastamoinen, J.A.Tostevin, S.Upadhyayula, R.Wilkinson Decay properties of 22Ne + α resonances and their impact on s-process nucleosynthesis NUCLEAR REACTIONS 6Li(22Ne, d)26Mg, E=154 MeV; measured reaction products; deduced resonance parameters, n/γ branching ratio. Comparison with Monte Carlo calculations.
doi: 10.1016/j.physletb.2020.135256
2020UP01 Phys.Rev. C 101, 034604 (2020) S.Upadhyayula, G.V.Rogachev, J.Bishop, V.Z.Goldberg, J.Hooker, C.Hunt, H.Jayatissa, E.Koshchiy, E.Uberseder, A.Volya, B.T.Roeder, A.Saastamoinen Search for the high-spin members of the α:2n:α band in 10Be NUCLEAR REACTIONS 4He(6He, 6He), (6He, 6He'), E(cm)=4-9 MeV [secondary 6He beam from 2H(7Li, 6He), E=60 MeV]; measured reaction products, Eα, Iα, σ(E, θ), using silicon detector for α detection and the MARS spectrometer for secondary beam identification at the cyclotron facility of Texas A and M University. 10Be; deduced resonance parameters and upper limit of Γ(α)/Γ(α') for an yrast 6+ state at 13.5 MeV as the next member of the molecular α:2n:α rotational band in 10Be; no evidence found for a strong resonance at 13.5 MeV in the elastic and inelastic channels. GEANT4 Monte Carlo simulations. Comparison with theoretical predictions, and with previous experimental studies.
doi: 10.1103/PhysRevC.101.034604
2019HO14 Phys.Rev. C 100, 054618 (2019) J.Hooker, G.V.Rogachev, E.Koshchiy, S.Ahn, M.Barbui, V.Z.Goldberg, C.Hunt, H.Jayatissa, E.C.Pollacco, B.T.Roeder, A.Saastamoinen, S.Upadhyayula Structure of 9C through proton resonance scattering with the Texas Active Target detector NUCLEAR REACTIONS 1H(8B, p)9C*, E=60.8 MeV, [secondary 8B beam from 6Li(3He, n)8B, E=13.2 MeV/nucleon primary reaction, and using the Momentum Achromat Recoil Spectrometer (MARS) at the Cyclotron Institute of Texas A and M University]; measured charged products, 8B spectrum, Ep, (8Be)p-coin, angular distributions using TexAT time projection chamber (TPC) and CsI(Tl) scintillators. 9C; deduced levels, resonances, J, π, phase shifts, widths using R-matrix analysis. Comparison with previous experimental data, and with ab initio calculations in literature.
doi: 10.1103/PhysRevC.100.054618
2017HO10 Phys.Lett. B 769, 62 (2017) J.Hooker, G.V.Rogachev, V.Z.Goldberg, E.Koshchiy, B.T.Roeder, H.Jayatissa, C.Hunt, C.Magana, S.Upadhyayula, E.Uberseder, A.Saastamoinen Structure of 10N in 9C+p resonance scattering NUCLEAR REACTIONS 1H(9C, X)10N, E=23.4 MeV/nucleon; measured reaction products, Ep, Ip; deduced σ, J, π, resonance parameters.
doi: 10.1016/j.physletb.2017.03.025
2016UB01 Phys.Lett. B 754, 323 (2016) E.Uberseder, G.V.Rogachev, V.Z.Goldberg, E.Koshchiy, B.T.Roeder, M.Alcorta, G.Chubarian, B.Davids, C.Fu, J.Hooker, H.Jayatissa, D.Melconian, R.E.Tribble Nuclear structure beyond the neutron drip line: The lowest energy states in 9He via their T = 5/2 isobaric analogs in 9Li NUCLEAR REACTIONS 1H(8He, 8He), (8He, X)9Li, E(cm)<4.5 MeV; measured reaction products. 9He; deduced energy levels, J, π. Comparison with available data.
doi: 10.1016/j.physletb.2016.01.014
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