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Start Over Author "Gregorich K" Publisher escholarship, university of california
10 results on '"Gregorich K"'

1. Heavy element formation in compound nucleus reactions with 238U targets

Author

Gregorich, K, Dullman, CE, Loveland, W, Folden, CM, Gates, Jacklyn, Garcia, MA, Sudowe, R, Stavestra, L, Dragojevic, I, Nelson, SL, Pang, GK, Zielinski, PM, Chung, YH, Eichler, R, Schaedel, M, Teurler, A, Yakushev, A, Dvorak, J, Hoffman, DC, and Nitsche, H

Published
2023

2. Heavy element formation in compound nucleus reactions with 238U targets

Author

Gregorich, K, Dullman, CE, Loveland, W, Folden, CM, Gates, Jacklyn, Garcia, MA, Sudowe, R, Stavestra, L, Dragojevic, I, Nelson, SL, Pang, GK, Zielinski, PM, Chung, YH, Eichler, R, Schaedel, M, Teurler, A, Yakushev, A, Dvorak, J, Hoffman, DC, and Nitsche, H

Published
2021

3. Heavy element formation in compound nucleus reactions with 238U targets

Author

Gregorich, K, Gregorich, K, Dullman, CE, Loveland, W, Folden, CM, Gates, Jacklyn, Garcia, MA, Sudowe, R, Stavestra, L, Dragojevic, I, Nelson, SL, Pang, GK, Zielinski, PM, Chung, YH, Eichler, R, Schaedel, M, Teurler, A, Yakushev, A, Dvorak, J, Hoffman, DC, Nitsche, H, Gregorich, K, Gregorich, K, Dullman, CE, Loveland, W, Folden, CM, Gates, Jacklyn, Garcia, MA, Sudowe, R, Stavestra, L, Dragojevic, I, Nelson, SL, Pang, GK, Zielinski, PM, Chung, YH, Eichler, R, Schaedel, M, Teurler, A, Yakushev, A, Dvorak, J, Hoffman, DC, and Nitsche, H

Published
2022

4. Evidence for the Synthesis of Element 110 Produced by the 59Co+209Bi Reaction

Author

Ghiorso, A., Lee, D., Somerville, P., Loveland, W., Nitschke, M., Ghiorso, W., Seaborg, G.T., Wilmarth, P.A., Leres, R., Wydler, A., Nurmia, M.J., Gregorich, K., Gaylord, R., Hamilton, T., Hannink, N.J., Hoffman, D.C., Jarzynski, C., Kacher, C., Kadkhodayan, B., Kreek, S., Lane, M., Lyon, A., McMahan, M.A., Neu, M., Sikkeland, T., Swiatecki, W.J., Turler, A., Walton, J.T., and Yashita, S.

Published
1994

6. Fusion reaction Ca 48 + Bk 249 leading to formation of the element Ts (Z=117)

Author

Khuyagbaatar J., Yakushev A., Dullmann Ch. E., Ackermann D., Andersson L. -L., Asai M., Block M., Boll R. A., Brand H., Cox D. M., Dasgupta M., Derkx X., Di Nitto A., Eberhardt K., Even J., Evers M., Fahlander C., Forsberg U., Gates J. M., Gharibyan N., Golubev P., Gregorich K. E., Hamilton J. H., Hartmann W., Herzberg R. -D., Hessberger F. P., Hinde D. J., Hoffmann J., Hollinger R., Hubner A., Jager E., Kindler B., Kratz J. V., Krier J., Kurz N., Laatiaoui M., Lahiri S., Lang R., Lommel B., Maiti M., Miernik K., Minami S., Mistry A., Mokry C., Nitsche H., Omtvedt J. P., Pang G. K., Papadakis P., Renisch D., Roberto J., Rudolph D., Runke J., Rykaczewski K. P., Sarmiento L. G., Schadel M., Schausten B., Semchenkov A., Shaughnessy D. A., Steinegger P., Steiner J., Tereshatov E. E., Thorle-Pospiech P., Tinschert K., Torres De Heidenreich T., Trautmann N., Turler A., Uusitalo J., Ward D. E., Wegrzecki M., Wiehl N., Van Cleve S. M., Yakusheva V., Khuyagbaatar, J., Yakushev, A., Dullmann, Ch. E., Ackermann, D., Andersson, L. -L., Asai, M., Block, M., Boll, R. A., Brand, H., Cox, D. M., Dasgupta, M., Derkx, X., Di Nitto, A., Eberhardt, K., Even, J., Evers, M., Fahlander, C., Forsberg, U., Gates, J. M., Gharibyan, N., Golubev, P., Gregorich, K. E., Hamilton, J. H., Hartmann, W., Herzberg, R. -D., Hessberger, F. P., Hinde, D. J., Hoffmann, J., Hollinger, R., Hubner, A., Jager, E., Kindler, B., Kratz, J. V., Krier, J., Kurz, N., Laatiaoui, M., Lahiri, S., Lang, R., Lommel, B., Maiti, M., Miernik, K., Minami, S., Mistry, A., Mokry, C., Nitsche, H., Omtvedt, J. P., Pang, G. K., Papadakis, P., Renisch, D., Roberto, J., Rudolph, D., Runke, J., Rykaczewski, K. P., Sarmiento, L. G., Schadel, M., Schausten, B., Semchenkov, A., Shaughnessy, D. A., Steinegger, P., Steiner, J., Tereshatov, E. E., Thorle-Pospiech, P., Tinschert, K., Torres De Heidenreich, T., Trautmann, N., Turler, A., Uusitalo, J., Ward, D. E., Wegrzecki, M., Wiehl, N., Van Cleve, S. M., and Yakusheva, V.

Subjects
Nuclear Theory, Nuclear Experiment
Abstract

The heaviest currently known nuclei, which have up to 118 protons, have been produced in Ca48 induced reactions with actinide targets. Among them, the element tennessine (Ts), which has 117 protons, has been synthesized by fusing Ca48 with the radioactive target Bk249, which has a half-life of 327 d. The experiment was performed at the gas-filled recoil separator TASCA. Two long and two short α decay chains were observed. The long chains were attributed to the decay of Ts294. The possible origin of the short-decay chains is discussed in comparison with the known experimental data. They are found to fit with the decay chain patterns attributed to Ts293. The present experimental results confirm the previous findings at the Dubna Gas-Filled Recoil Separator on the decay chains originating from the nuclei assigned to Ts.

Published
2019

9. Low-lying states in Ra 219 and Rn 215: Sampling microsecond α -decaying nuclei

Author

Såmark-Roth, A, Sarmiento, LG, Rudolph, D, Ljungberg, J, Carlsson, BG, Fahlander, C, Forsberg, U, Golubev, P, Ragnarsson, I, Ackermann, D, Andersson, LL, Block, M, Brand, H, Cox, DM, Di Nitto, A, Düllmann, CE, Eberhardt, K, Even, J, Gates, JM, Gerl, J, Gregorich, KE, Gross, CJ, Herzberg, RD, Heßberger, FP, Jäger, E, Khuyagbaatar, J, Kindler, B, Kojouharov, I, Kratz, JV, Krier, J, Kurz, N, Lommel, B, Mistry, A, Mokry, C, Omtvedt, JP, Papadakis, P, Runke, J, Rykaczewski, K, Schädel, M, Schaffner, H, Schausten, B, Thörle-Pospiech, P, Trautmann, N, Torres, T, Türler, A, Ward, A, Wiehl, N, Yakushev, A, Såmark-Roth, A., Sarmiento, L. G., Rudolph, D., Ljungberg, J., Carlsson, B. G., Fahlander, C., Forsberg, U., Golubev, P., Ragnarsson, I., Ackermann, D., Andersson, L. -L., Block, M., Brand, H., Cox, D. M., Di Nitto, A., Düllmann, Ch. E., Eberhardt, K., Even, J., Gates, J. M., Gerl, J., Gregorich, K. E., Gross, C. J., Herzberg, R. -D., Heßberger, F. P., Jäger, E., Khuyagbaatar, J., Kindler, B., Kojouharov, I., Kratz, J. V., Krier, J., Kurz, N., Lommel, B., Mistry, A., Mokry, C., Omtvedt, J. P., Papadakis, P., Runke, J., Rykaczewski, K., Schädel, M., Schaffner, H., Schausten, B., Thörle-Pospiech, P., Trautmann, N., Torres, T., Türler, A., Ward, A., Wiehl, N., and Yakushev, A.

Subjects
Nuclear and High Energy Physics
Abstract

© 2018 American Physical Society. Short-lived α-decaying nuclei "northeast" of Pb208 in the chart of nuclides were studied using the reaction Ca48+Am243 with the decay station TASISpec at TASCA, GSI Darmstadt. Decay energies and times from pile-up events were extracted with a tailor-made pulse-shape analysis routine and specific α-decay chains were identified in a correlation analysis. Decay chains starting with the even-even Ra220 and its odd-A neighbors, Fr219, and Ra221,219, with a focus on the Ra219→Rn215 decay, were studied by means of α-γ spectroscopy. A revised α-decay scheme of Ra219 is proposed, including a new decay branch from a previously not considered isomeric state at 17 keV excitation energy. Conclusions on nuclear structure are drawn from the experimental data, aided by Geant4 simulations and a discussion on theoretical calculations.

Published
2018
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10. Study of non-fusion products in the Ti50+Cf249 reaction

Author

Di Nitto, A, Khuyagbaatar, J, Ackermann, D, Andersson, LL, Badura, E, Block, M, Brand, H, Conrad, I, Cox, DM, Düllmann, CE, Dvorak, J, Eberhardt, K, Ellison, PA, Esker, NE, Even, J, Fahlander, C, Forsberg, U, Gates, JM, Golubev, P, Gothe, O, Gregorich, KE, Hartmann, W, Herzberg, RD, Heßberger, FP, Hoffmann, J, Hollinger, R, Hübner, A, Jäger, E, Kindler, B, Klein, S, Kojouharov, I, Kratz, JV, Krier, J, Kurz, N, Lahiri, S, Lommel, B, Maiti, M, Mändl, R, Merchán, E, Minami, S, Mistry, AK, Mokry, C, Nitsche, H, Omtvedt, JP, Pang, GK, Renisch, D, Rudolph, D, Runke, J, Sarmiento, LG, Schädel, M, Schaffner, H, Schausten, B, Semchenkov, A, Steiner, J, Thörle-Pospiech, P, Trautmann, N, Türler, A, Uusitalo, J, Ward, D, Wegrzecki, M, Wieczorek, P, Wiehl, N, Yakushev, A, Yakusheva, V, Di Nitto, A., Khuyagbaatar, J., Ackermann, D., Andersson, L. -L., Badura, E., Block, M., Brand, H., Conrad, I., Cox, D. M., Dullmann, C. E., Dvorak, J., Eberhardt, K., Ellison, P. A., Esker, N. E., Even, J., Fahlander, C., Forsberg, U., Gates, J. M., Golubev, P., Gothe, O., Gregorich, K. E., Hartmann, W., Herzberg, R. D., Hessberger, F. P., Hoffmann, J., Hollinger, R., Hubner, A., Jager, E., Kindler, B., Klein, S., Kojouharov, I., Kratz, J. V., Krier, J., Kurz, N., Lahiri, S., Lommel, B., Maiti, M., Mandl, R., Merchan, E., Minami, S., Mistry, A. K., Mokry, C., Nitsche, H., Omtvedt, J. P., Pang, G. K., Renisch, D., Rudolph, D., Runke, J., Sarmiento, L. G., Schadel, M., Schaffner, H., Schausten, B., Semchenkov, A., Steiner, J., Thorle-Pospiech, P., Trautmann, N., Turler, A., Uusitalo, J., Ward, D., Wegrzecki, M., Wieczorek, P., Wiehl, N., Yakushev, A., and Yakusheva, V.

Subjects
Multi-nucleon transfer reactions, alpha decay, Molecular, Production of radioactive nuclei, Atomic, Nuclear & Particles Physics, lcsh:QC1-999, Particle and Plasma Physics, Quasifission, Nuclear, Multi-nucleon transfer reaction, α decay, Nuclear Experiment, lcsh:Physics, Mathematical Physics, Astronomical and Space Sciences
Abstract

The isotopic distribution of nuclei produced in the 50Ti + 249Cf reaction has been studied at the gas-filled recoil separator TASCA at GSI Darmstadt, which separates ions according to differences in magnetic rigidity. The bombardment was performed at an energy around the Bass barrier and with the TASCA magnetic fields set for collecting fusion-evaporation reaction products. Fifty-three isotopes located “north-east” of 208Pb were identified as recoiling products formed in non-fusion channels of the reaction. These recoils were implanted with energies in two distinct ranges; besides one with higher energy, a significant low-energy contribution was identified. The latter observation was not expected to occur according to kinematics of the known types of reactions, namely quasi-elastic, multi-nucleon transfer, deep-inelastic collisions or quasifission. The present observations are discussed within the framework of two-body kinematics passing through the formation of a composite system. Keywords: Production of radioactive nuclei, α decay, Multi-nucleon transfer reactions, Quasifission

Published
2018
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