Search Results - "Seweryniak, D."

Status and plans for recoil separators for experiments with intense stable beams from ATLAS by Seweryniak, D.

“…•Argonne fragment mass analyzer was upgraded for experiments with high beam intensities.•A novel gas-filled separator was designed to study very heavy…”
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Isomer depletion as experimental evidence of nuclear excitation by electron capture by Chiara, C. J., Carroll, J. J., Carpenter, M. P., Greene, J. P., Hartley, D. J., Janssens, R. V. F., Lane, G. J., Marsh, J. C., Matters, D. A., Polasik, M., Rzadkiewicz, J., Seweryniak, D., Zhu, S., Bottoni, S., Hayes, A. B., Karamian, S. A.

“…Experimental evidence is presented for isomer depletion through nuclear excitation by electron capture in molybdenum-93 nuclei. Exciting a nucleus of 93 Mo If…”
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Emergence of an island of extreme nuclear isomerism at high excitation near 208Pb by Wahid, S.G., Tandel, S.K., Suman, Saket, Srivastava, P.C., Kumar, Anil, Chowdhury, P., Kondev, F.G., Janssens, R.V.F., Carpenter, M.P., Lauritsen, T., Seweryniak, D., Zhu, S.

“…Metastable states with $T_{1/2}$ = 8(2) ms in 205Bi and $T_{1/2}$ = 0.22(2) ms in 204Pb, with ≈ 8 MeV excitation energy and angular momentum ≥ 22 $\hbar$, have…”
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Reply to: Possible overestimation of isomer depletion due to contamination by Chiara, C. J., Carroll, J. J., Carpenter, M. P., Greene, J. P., Hartley, D. J., Janssens, R. V. F., Lane, G. J., Marsh, J. C., Matters, D. A., Polasik, M., Rzadkiewicz, J., Seweryniak, D., Zhu, S., Bottoni, S., Hayes, A. B.

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The rate of the astrophysical 48Cr(p,γ)49Mn reaction and its influence on the potential A = 48 waiting point in the rp process by O'Shea, C., Lotay, G., Doherty, D.T., Seweryniak, D., Lau, R., Bartram, G., Byrne, S., Canete, L., Carpenter, M.P., Chipps, K.A., Copp, P.A., Cousins, C., Henderson, J., Huang, T., Jayatissa, H., Kondev, F., Müller-Gatermann, C., Pain, S.D., Paxman, C., Reed, B.J., Reviol, W., Rogers, A.M., Russell, R., Schatz, H., Siciliano, M.

“…We have performed a detailed γ-ray spectroscopy study of the nucleus, 49Mn, using the GRETINA tracking array and FMA recoil separator. With this powerful new…”
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E2 rotational invariants of 01+ and 21+ states for 106Cd: The emergence of collective rotation by Gray, T.J., Allmond, J.M., Janssens, R.V.F., Korten, W., Stuchbery, A.E., Wood, J.L., Ayangeakaa, A.D., Bottoni, S., Bucher, B.M., Campbell, C.M., Carpenter, M.P., Crawford, H.L., David, H., Doherty, D.T., Fallon, P., Febbraro, M.T., Galindo-Uribarri, A., Gross, C.J., Komorowska, M., Kondev, F.G., Lauritsen, T., Macchiavelli, A.O., Napiorkowsi, P., Padilla-Rodal, E., Pain, S.D., Reviol, W., Sarantites, D.G., Savard, G., Seweryniak, D., Wu, C.Y., Yu, C.-H., Zhu, S.

“…The collective structure of 106Cd is elucidated by multi-step Coulomb excitation of a 3.849 MeV/A beam of 106Cd on a 1.1 mg/cm2208Pb target using…”
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First observation of a shape isomer and a low-lying strongly-coupled prolate band in neutron-deficient semi-magic 187Pb by Zhang, W.Q., Andreyev, A.N., Liu, Z., Seweryniak, D., Huang, H., Li, Z.H., Li, J.G., Guo, C.Y., Doherty, D.T., Barzakh, A.E., Van Duppen, P., Cubiss, J.G., Andel, B., Antalic, S., Block, M., Bronis, A., Carpenter, M.P., Copp, P., Ding, B., Favier, Z., Giacoppo, F., Huang, T.H., Yu, X.H., Kindler, B., Kondev, F.G., Lauritsen, T., Li, G.S., Lommel, B., Lu, H.Y., Al Monthery, M., Mošať, P., Niu, Y.F., Raison, C., Reviol, W., Savard, G., Stolze, S., Wilson, G.L., Wu, H.Y., Wang, Z.H., Xu, F.R., Zeng, Q.B., Zhou, X.H.

“…Prompt and delayed γ-ray spectroscopy of the neutron-deficient, semi-magic isotope 187Pb has been performed using the recoil-decay and isomer-decay tagging…”
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Decay of the key 92-keV resonance in the 25Mg(p,γ) reaction to the ground and isomeric states of the cosmic γ-ray emitter 26Al by Kankainen, A., Woods, P.J., Doherty, D.T., Albers, H.M., Albers, M., Ayangeakaa, A.D., Carpenter, M.P., Chiara, C.J., Harker, J.L., Janssens, R.V.F., Lederer-Woods, C., Seweryniak, D., Strieder, F., Zhu, S.

“…The 92-keV resonance in the 25Mg(p,γ)26Al reaction plays a key role in the production of 26Al at astrophysical burning temperatures of ≈100 MK in the Mg-Al…”
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Corrigendum to “Two-phonon wobbling in 135Pr” [Phys. Lett. B 792 (2019) 170–174] by Sensharma, N., Garg, U., Zhu, S., Ayangeakaa, A.D., Frauendorf, S., Li, W., Bhat, G.H., Sheikh, J.A., Carpenter, M.P., Chen, Q.B., Cozzi, J.L., Ghugre, S.S., Gupta, Y.K., Hartley, D.J., Howard, K.B., Janssens, R.V.F., Kondev, F.G., McMaken, T.C., Palit, R., Sethi, J., Seweryniak, D., Singh, R.P.

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First observation of the decay of the 13/2+ isomer in 183Hg and B(M2) systematics of neutron transitions across the nuclear chart by Huang, H., Zhang, W.Q., Andreyev, A.N., Liu, Z., Seweryniak, D., Li, Z.H., Guo, C.Y., Barzakh, A.E., Van Duppen, P., Andel, B., Antalic, S., Block, M., Bronis, A., Carpenter, M.P., Copp, P., Cubiss, J.G., Ding, B., Doherty, D.T., Favier, Z., Giacoppo, F., Huang, T.H., Kindler, B., Kondev, F.G., Lauritsen, T., Li, J.G., Li, G.S., Lommel, B., Lu, H.Y., Al Monthery, M., Mošať, P., Niu, Y.F., Raison, C., Reviol, W., Savard, G., Stolze, S., Wilson, G.L., Wu, H.Y., Wang, Z.H., Xu, F.R., Zeng, Q.B., Yu, X.H., Zeng, F.F., Zhou, X.H.

“…The decay of the 13/2+ isomeric state in 183Hg was observed for the first time following the a decay of the 13/2+ isomer in 187Pb produced in the 142Nd(50Cr,…”
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Exploiting Isospin Symmetry to Study the Role of Isomers in Stellar Environments by Hallam, S, Lotay, G, Gade, A, Doherty, D T, Belarge, J, Bender, P C, Brown, B A, Browne, J, Catford, W N, Elman, B, Estradé, A, Hall, M R, Longfellow, B, Lunderberg, E, Montes, F, Moukaddam, M, O'Malley, P, Ong, W-J, Schatz, H, Seweryniak, D, Schmidt, K, Timofeyuk, N K, Weisshaar, D, Zegers, R G T

“…Proton capture on the excited isomeric state of ^{26}Al strongly influences the abundance of ^{26}Mg ejected in explosive astronomical events and, as such,…”
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Spectroscopy of 187Tl: shape coexistence by Guo, C. Y., Zhang, W. Q., Huang, H., Zhang, S. Q., Li, Z. H., Liu, Z., Hua, H., Luo, D. W., Wu, H. Y., Andreyev, A. N., Seweryniak, D., Andel, B., Antalic, S., Barzakh, A. E., Block, M., Bronis, A., Carpenter, M. P., Copp, P., Cubiss, J. G., Doherty, D. T., Van Duppen, P., Favier, Z., Giacoppo, F., Kindler, B., Kondev, F. G., Lauritsen, T., Li, X. Q., Lommel, B., Al Monthery, M., Mošať, P., Ni, L., Raison, C., Reviol, W., Savard, G., Stolze, S., Wilson, G. L., Xu, C., Zhang, J. Z., Zhang, S. Y., Zhou, Z. X.

“…The prompt and delayed γ -ray spectra of 187 Tl was studied via the 142 Nd( 50 Cr, 3 p 2 n ) 187 Tl fusion-evaporation reaction at a beam energy of 255 MeV. An…”
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Measurement of key resonance states for the P30(p,γ)S31 reaction rate, and the production of intermediate-mass elements in nova explosions by Kankainen, A., Woods, P.J., Schatz, H., Poxon-Pearson, T., Doherty, D.T., Bader, V., Baugher, T., Bazin, D., Brown, B.A., Browne, J., Estrade, A., Gade, A., José, J., Kontos, A., Langer, C., Lotay, G., Meisel, Z., Montes, F., Noji, S., Nunes, F., Perdikakis, G., Pereira, J., Recchia, F., Redpath, T., Stroberg, R., Scott, M., Seweryniak, D., Stevens, J., Weisshaar, D., Wimmer, K., Zegers, R.

“…We report the first experimental constraints on spectroscopic factors and strengths of key resonances in the P30(p,γ)S31 reaction critical for determining the…”
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Longitudinal Wobbling Motion in Au187 by Sensharma, N, Garg, U, Chen, Q B, Frauendorf, S, Burdette, D P, Cozzi, J L, Howard, K B, Zhu, S, Carpenter, M P, Copp, P, Kondev, F G, Lauritsen, T, Li, J, Seweryniak, D, Wu, J, Ayangeakaa, A D, Hartley, D J, F Janssens, R V, ney, A M, Walters, W B, Ghugre, S Ghugre, Palit, R

“…The rare phenomenon of nuclear wobbling motion has been investigated in the nucleus Au187. A longitudinal wobbling-bands pair has been identified and clearly…”
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Decay and Fission Hindrance of Two- and Four-Quasiparticle K Isomers in ^{254}Rf by David, H M, Chen, J, Seweryniak, D, Kondev, F G, Gates, J M, Gregorich, K E, Ahmad, I, Albers, M, Alcorta, M, Back, B B, Baartman, B, Bertone, P F, Bernstein, L A, Campbell, C M, Carpenter, M P, Chiara, C J, Clark, R M, Cromaz, M, Doherty, D T, Dracoulis, G D, Esker, N E, Fallon, P, Gothe, O R, Greene, J P, Greenlees, P T, Hartley, D J, Hauschild, K, Hoffman, C R, Hota, S S, Janssens, R V F, Khoo, T L, Konki, J, Kwarsick, J T, Lauritsen, T, Macchiavelli, A O, Mudder, P R, Nair, C, Qiu, Y, Rissanen, J, Rogers, A M, Ruotsalainen, P, Savard, G, Stolze, S, Wiens, A, Zhu, S

“…Two isomers decaying by electromagnetic transitions with half-lives of 4.7(1.1) and 247(73) μs have been discovered in the heavy ^{254}Rf nucleus. The…”
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Search for Nova Presolar Grains: γ -Ray Spectroscopy of 34Ar and its Relevance for the Astrophysical 33Cl (p , γ) Reaction by Kennington, A R L, Lotay, G, Doherty, D T, Seweryniak, D, Andreoiu, C, Auranen, K, Carpenter, M P, Catford, W N, Deibel, C M, Hadyńska-Klęk, K, Hallam, S, Hoff, D E M, Huang, T, Janssens, R V F, Jazrawi, S, José, J, Kondev, F G, Lauritsen, T, Li, J, Rogers, A M, Saiz, J, Savard, G, Stolze, S, Wilson, G L, Zhu, S

“…The discovery of presolar grains in primitive meteorites has initiated a new era of research in the study of stellar nucleosynthesis. However, the accurate…”
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Isomers and oblate rotation in Pt isotopes: Delineating the limit for collectivity at high spins by Tandel, S.K., Wahid, S.G., Chowdhury, P., Janssens, R.V.F., Carpenter, M.P., Khoo, T.L., Kondev, F.G., Lauritsen, T., Lister, C.J., Seweryniak, D., Zhu, S.

“…Rotation-aligned isomeric states and associated oblate collective sequences are established in even Pt isotopes. Reduced E2 transition probabilities for the…”
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Unexpected behavior of heavy-ion fusion cross sections at extreme sub-barrier energies by Jiang, C L, Esbensen, H, Rehm, K E, Back, B B, Janssens, R V F, Caggiano, J A, Collon, P, Greene, J, Heinz, A M, Henderson, D J, Nishinaka, I, Pennington, T O, Seweryniak, D

“…The excitation function for fusion evaporation in the (60)Ni+ (89)Y system was measured over a range in cross section covering 6 orders of magnitude. The cross…”
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Characterization of octupole-type structures in Th 221 by Reviol, W., Janssens, R. V. F., Frauendorf, S., Sarantites, D. G., Carpenter, M. P., Chen, X., Chiara, C. J., Hartley, D. J., Hauschild, K., Lauritsen, T., Lopez-Martens, A., Montero, M., Pechenaya, O. L., Seweryniak, D., Snyder, J. B., Zhu, S.

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Shell-structure and pairing interaction in superheavy nuclei: rotational properties of the z=104 nucleus (256)rf by Greenlees, P T, Rubert, J, Piot, J, Gall, B J P, Andersson, L L, Asai, M, Asfari, Z, Cox, D M, Dechery, F, Dorvaux, O, Grahn, T, Hauschild, K, Henning, G, Herzan, A, Herzberg, R-D, Heßberger, F P, Jakobsson, U, Jones, P, Julin, R, Juutinen, S, Ketelhut, S, Khoo, T-L, Leino, M, Ljungvall, J, Lopez-Martens, A, Lozeva, R, Nieminen, P, Pakarinen, J, Papadakis, P, Parr, E, Peura, P, Rahkila, P, Rinta-Antila, S, Ruotsalainen, P, Sandzelius, M, Sarén, J, Scholey, C, Seweryniak, D, Sorri, J, Sulignano, B, Theisen, Ch, Uusitalo, J, Venhart, M

“…The rotational band structure of the Z=104 nucleus (256)Rf has been observed up to a tentative spin of 20ℏ using state-of-the-art γ-ray spectroscopic…”
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