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1. Influence of the np interaction on the beta decay of Pd-94

Author

Singh, B. S. Nara, Brock, T. S., Wadsworth, R., Grawe, H., Boutachkov, P., Braun, N., Blazhev, A., Liu, Z., Gorska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhaeuser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojouharov, I., Kruecken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, Johan, Pfuetzner, M., Prochazka, A., Podolyak, Zs., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Schaffner, H., Söderström, Pär-Anders, Warr, N., Weick, H., Wollersheim, H. -J, Woods, P. J., and Nowacki, F.

Subjects
Naturvetenskap, Natural Sciences
Abstract

We present results from stopped beam rare isotope spectroscopic investigations at the GSI (RISING) experiment based on the detection of gamma-ray transitions following the beta decay of Pd-94. A comparison between the measured low-lying level scheme of Rh-94 and the prediction from shell-model calculations reveals the important roles of the g(7/2) and g(9/2) orbitals in explaining the structural features. The low values of the Gamow-Teller strengths B(GT) can be attributed to the influence of the neutron-proton interaction, which gives rise to an increased seniority mixing for the nuclear states, thereby leading to a fragmentation of the strength to several daughter levels. These results provide further strong indications that Pd-94 resides in the middle of a structural transition region in the Pd isotopes as the N = Z line is approached.

Published
2012

2. Influence of the np Interaction on the Beta Decay of 94Pd

Author

Singh, B. S. Nara, Brock, T. S., Wadsworth, R., Grawe, H., Boutachkov, P., Braun, N., Blazhev, A., Liu, Z., Gorska, M., Pietri, S., Rudolph, Dirk, Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhaeuser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, Robert, Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojouharov, I., Kruecken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, J., Pfuetzner, M., Prochazka, A., Podolyak, Zs., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Schaffner, H., Soderstrom, P. -A., Warr, N., Weick, H., Wollersheim, H. -J., Woods, P. J., and Nowacki, F.

Subjects
Subatomic Physics
Abstract

We present results from stopped beam rare isotope spectroscopic investigations at the GSI (RISING) experiment based on the detection of gamma-ray transitions following the beta decay of Pd-94. A comparison between the measured low-lying level scheme of Rh-94 and the prediction from shell-model calculations reveals the important roles of the g(7/2) and g(9/2) orbitals in explaining the structural features. The low values of the Gamow-Teller strengths B(GT) can be attributed to the influence of the neutron-proton interaction, which gives rise to an increased seniority mixing for the nuclear states, thereby leading to a fragmentation of the strength to several daughter levels. These results provide further strong indications that Pd-94 resides in the middle of a structural transition region in the Pd isotopes as the N = Z line is approached.

Published
2012

3. 16+ Spin-Gap Isomer in 96Cd

Author

Singh, B. S. Nara, Liu, Z., Wadsworth, R., Grawe, H., Brock, T. S., Boutachkov, P., Braun, N., Blazhev, A., Gorska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Eppinger, K., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhaeuser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojouharov, I., Kruecken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, Johan, Pfuetzner, M., Prochazka, A., Podolyak, Zs., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Schaffner, H., Söderström, Per-Anders, Warr, N., Weick, H., Wollersheim, H. -J, Woods, P. J., Nowacki, F., and Sieja, K.

Subjects
Physical Sciences, Subatomic Physics, Fysik
Abstract

A beta-decaying high-spin isomer in Cd-96, with a half-life T-1/2 = 0.29(-0.10)(+0.11) s, has been established in a stopped beam rare isotope spectroscopic investigations at GSI (RISING) experiment. The nuclei were produced using the fragmentation of a primary beam of Xe-124 on a Be-9 target. From the half-life and the observed gamma decays in the daughter nucleus, Ag-96, we conclude that the beta-decaying state is the long predicted 16(+) "spin-gap'' isomer. Shell-model calculations, using the Gross-Frenkel interaction and the pi nu(p(1/2,)g(9/2)) model space, show that the isoscalar component of the neutron-proton interaction is essential to explain the origin of the isomer. Core excitations across the N = Z = 50 gaps and the Gamow-Teller strength, Bd(GT) distributions have been studied via large-scale shell-model calculations using the pi nu(g, d, s) model space to compare with the experimental B(GT) value obtained from the half-life of the isomer.

Published
2011

4. High-spin isomers in (96)Ag : Excitations across the Z=38 and Z=50, N=50 closed shells

Author

Boutachkov, P., Gorska, M., Grawe, H., Blazhev, A., Braun, N., Brock, T. S., Liu, Z., Singh, B. S. Nara, Wadsworth, R., Pietri, S., Domingo-Pardo, C., Kojouharov, I., Caceres, L., Engert, T., Farinon, F., Gerl, J., Goel, N., Grbosz, J., Hoischen, Robert, Kurz, N., Nociforo, C., Prochazka, A., Schaffner, H., Steer, S. J., Weick, H., Wollersheim, H. -J., Faestermann, T., Podolyak, Zs., Rudolph, Dirk, Atac, A., Bettermann, L., Eppinger, K., Finke, F., Geibel, K., Gottardo, A., Hinke, C., Ilie, G., Iwasaki, H., Jolie, J., Kruecken, R., Merchan, E., Nyberg, J., Pfuetzner, M., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Soderstrom, P. -A., Warr, N., Woods, P. J., Nowacki, F., and Sieja, K.

Subjects
Subatomic Physics, Physical Sciences, Fysik
Abstract

Excited states in (96)Ag were populated in fragmentation of an 850-MeV/u (124)Xe beam on a 4-g/cm(2) Be target. Three new high-spin isomers were identified and the structure of the populated states was investigated. The level scheme of (96)Ag was established, and a spin parity of (13(-)), (15(+)), and (19(+)) was assigned to the new isomeric states. Shell-model calculations were performed in various model spaces, including pi nu(p(1/2), g(9/2), f(5/2), p(3/2)) and the large-scale shell-model space pi nu(gds), to account for the observed parity changing M2 and E3 transitions from the (13(-)) isomer and the E2 and E4 transitions from the (19(+)) core-excited isomer, respectively. The calculated level schemes and reduced transition strengths are found to be in very good agreement with the experiment.

Published
2011

5. Spin-gap isomer in 96Cd

Author

Wadsworth, R., Singh, B. S. N., Liu, Z., Grawe, H., Brock, T. S., Boutachkov, P., Braun, N., Blazhev, A., Gorska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Eppinger, K., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhauser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojouharov, I., Krucken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, Johan, Pfutzner, M., Prochazka, A., Podolyak, Z., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Schaffner, H., Soderstrom, P. -A, Warr, N., Weick, H., Wollersheim, H. -J, Woods, P. J., Nowacki, F., Sieja, K., Wadsworth, R., Singh, B. S. N., Liu, Z., Grawe, H., Brock, T. S., Boutachkov, P., Braun, N., Blazhev, A., Gorska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Eppinger, K., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhauser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojouharov, I., Krucken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, Johan, Pfutzner, M., Prochazka, A., Podolyak, Z., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Schaffner, H., Soderstrom, P. -A, Warr, N., Weick, H., Wollersheim, H. -J, Woods, P. J., Nowacki, F., and Sieja, K.

Abstract

Evidence has been obtained for the existence of the long predicted 16 + spin-gap isomer in 96Cd. The decay of the isomer was identified and studied following the use of an 850 MeV/u beam of 124Xe impinging on a Be target and the fragment recoil separator at the GSI Laboratory. Gamma decays from the fragments were detected using the RISING gamma ray array, in its stopped beam configuration, plus a silicon active stopper. The data obtained have been compared with shell model predictions, which indicate that the isoscalar neutron-proton interaction plays a key role in the formation of the isomer.

Published
2012
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6. Spin-gap isomer in 96 Cd

Author

Wadsworth, R, Singh, B S Nara, Liu, Z, Grawe, H, Brock, T S, Boutachkov, P, Braun, N, Blazhev, A, Gorska, M, Pietri, S, Rudolph, D, Domingo-Pardo, C, Steer, S J, Atac, A, Bettermann, L, Caceres, L, Eppinger, K, Engert, T, Faestermann, T, Farinon, F, Finke, F, Geibel, K, Gerl, J, Gernhauser, R, Goel, N, Gottardo, A, Grebosz, J, Hinke, C, Hoischen, R, Ilie, G, Iwasaki, H, Jolie, J, Kaskas, A, Kojouharov, I, Krucken, R, Kurz, N, Merchan, E, Nociforo, C, Nyberg, Johan, Pfutzner, M, Prochazka, A, Podolyak, Zs, Regan, P H, Reiter, P, Rinta-Antila, S, Scholl, C, Schaffner, H, Soderstrom, P-A, Warr, N, Weick, H, Wollersheim, H-J, Woods, P J, Nowacki, F, Sieja, K, Wadsworth, R, Singh, B S Nara, Liu, Z, Grawe, H, Brock, T S, Boutachkov, P, Braun, N, Blazhev, A, Gorska, M, Pietri, S, Rudolph, D, Domingo-Pardo, C, Steer, S J, Atac, A, Bettermann, L, Caceres, L, Eppinger, K, Engert, T, Faestermann, T, Farinon, F, Finke, F, Geibel, K, Gerl, J, Gernhauser, R, Goel, N, Gottardo, A, Grebosz, J, Hinke, C, Hoischen, R, Ilie, G, Iwasaki, H, Jolie, J, Kaskas, A, Kojouharov, I, Krucken, R, Kurz, N, Merchan, E, Nociforo, C, Nyberg, Johan, Pfutzner, M, Prochazka, A, Podolyak, Zs, Regan, P H, Reiter, P, Rinta-Antila, S, Scholl, C, Schaffner, H, Soderstrom, P-A, Warr, N, Weick, H, Wollersheim, H-J, Woods, P J, Nowacki, F, and Sieja, K

Abstract

Evidence has been obtained for the existence of the long predicted 16 + spin-gap isomer in 96 Cd. The decay of the isomer was identified and studied following the use of an 850 MeV/u beam of 124 Xe impinging on a Be target and the fragment recoil separator at the GSI Laboratory. Gamma decays from the fragments were detected using the RISING gamma ray array, in its stopped beam configuration, plus a silicon active stopper. The data obtained have been compared with shell model predictions, which indicate that the isoscalar neutron-proton interaction plays a key role in the formation of the isomer.

Published
2012

7. Exotic nuclear studies around and below A = 100

Author

Nara Singh, B. S., Wadsworth, R., Boutachkov, P., Blazhev, A., Liu, Z., Grawe, H., Brock, T. S., Braun, N., Go, M., Pietri, S., Rudolph, D., Domingo‐Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Cáceres, L., Eppinger, K., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., GernhÀuser, R., Goel, N., Gottardo, A., Grȩbosz, J., Hinke, C., Hoischen, R., llie, G., Iwasaki, H., Jolie, J., Kaşkaş, A., Kojouharov, I., KrÌcken, R., Kurz, N., Merchánt, E., Nociforo, C., Nyberg, Johan, PfÌtzner, M., Prochazka, A., Podolyák, Zs., Regan, P. H, Reiter, P., Rinta‐Antila, S., Scholl, C., Schaffner, H., Söderström, P. ‐A., Warr, N., Weick, H., Wollersheim, H. ‐J., Woods, P. J., Nowacki, F., Sieja, K., Nara Singh, B. S., Wadsworth, R., Boutachkov, P., Blazhev, A., Liu, Z., Grawe, H., Brock, T. S., Braun, N., Go, M., Pietri, S., Rudolph, D., Domingo‐Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Cáceres, L., Eppinger, K., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., GernhÀuser, R., Goel, N., Gottardo, A., Grȩbosz, J., Hinke, C., Hoischen, R., llie, G., Iwasaki, H., Jolie, J., Kaşkaş, A., Kojouharov, I., KrÌcken, R., Kurz, N., Merchánt, E., Nociforo, C., Nyberg, Johan, PfÌtzner, M., Prochazka, A., Podolyák, Zs., Regan, P. H, Reiter, P., Rinta‐Antila, S., Scholl, C., Schaffner, H., Söderström, P. ‐A., Warr, N., Weick, H., Wollersheim, H. ‐J., Woods, P. J., Nowacki, F., and Sieja, K.

Published
2011
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8. 16(+) Spin-Gap Isomer in Cd-96

Author

Singh, B. S. Nara, Liu, Z., Wadsworth, R., Grawe, H., Brock, T. S., Boutachkov, P., Braun, N., Blazhev, A., Gorska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Eppinger, K., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhaeuser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojouharov, I., Kruecken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, J., Pfuetzner, M., Prochazka, A., Podolyak, Zs., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Schaffner, H., Soderstrom, P. -A., Warr, N., Weick, H., Wollersheim, H. -J., Woods, P. J., Nowacki, F., Sieja, K., Singh, B. S. Nara, Liu, Z., Wadsworth, R., Grawe, H., Brock, T. S., Boutachkov, P., Braun, N., Blazhev, A., Gorska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Eppinger, K., Engert, T., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhaeuser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojouharov, I., Kruecken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, J., Pfuetzner, M., Prochazka, A., Podolyak, Zs., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Schaffner, H., Soderstrom, P. -A., Warr, N., Weick, H., Wollersheim, H. -J., Woods, P. J., Nowacki, F., and Sieja, K.

Abstract

A beta-decaying high-spin isomer in Cd-96, with a half-life T-1/2 = 0.29(-0.10)(+0.11) s, has been established in a stopped beam rare isotope spectroscopic investigations at GSI (RISING) experiment. The nuclei were produced using the fragmentation of a primary beam of Xe-124 on a Be-9 target. From the half-life and the observed gamma decays in the daughter nucleus, Ag-96, we conclude that the beta-decaying state is the long predicted 16(+) spin-gap'' isomer. Shell-model calculations, using the Gross-Frenkel interaction and the pi nu(p(1/2,)g(9/2)) model space, show that the isoscalar component of the neutron-proton interaction is essential to explain the origin of the isomer. Core excitations across the N = Z = 50 gaps and the Gamow-Teller strength, Bd(GT) distributions have been studied via large-scale shell-model calculations using the pi nu(g, d, s) model space to compare with the experimental B(GT) value obtained from the half-life of the isomer.

Published
2011

9. High-spin isomers in Ag-96: Excitations across the Z=38 and Z=50, N=50 closed shells

Author

Boutachkov, P., Gorska, M., Grawe, H., Blazhev, A., Braun, N., Brock, T. S., Liu, Z., Singh, B. S. Nara, Wadsworth, R., Pietri, S., Domingo-Pardo, C., Kojouharov, I., Caceres, L., Engert, T., Farinon, F., Gerl, J., Goel, N., Grbosz, J., Hoischen, R., Kurz, N., Nociforo, C., Prochazka, A., Schaffner, H., Steer, S. J., Weick, H., Wollersheim, H. -J., Faestermann, T., Podolyak, Zs., Rudolph, D., Atac, A., Bettermann, L., Eppinger, K., Finke, F., Geibel, K., Gottardo, A., Hinke, C., Ilie, G., Iwasaki, H., Jolie, J., Kruecken, R., Merchan, E., Nyberg, J., Pfuetzner, M., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Soderstrom, P. -A., Warr, N., Woods, P. J., Nowacki, F., Sieja, K., Boutachkov, P., Gorska, M., Grawe, H., Blazhev, A., Braun, N., Brock, T. S., Liu, Z., Singh, B. S. Nara, Wadsworth, R., Pietri, S., Domingo-Pardo, C., Kojouharov, I., Caceres, L., Engert, T., Farinon, F., Gerl, J., Goel, N., Grbosz, J., Hoischen, R., Kurz, N., Nociforo, C., Prochazka, A., Schaffner, H., Steer, S. J., Weick, H., Wollersheim, H. -J., Faestermann, T., Podolyak, Zs., Rudolph, D., Atac, A., Bettermann, L., Eppinger, K., Finke, F., Geibel, K., Gottardo, A., Hinke, C., Ilie, G., Iwasaki, H., Jolie, J., Kruecken, R., Merchan, E., Nyberg, J., Pfuetzner, M., Regan, P. H., Reiter, P., Rinta-Antila, S., Scholl, C., Soderstrom, P. -A., Warr, N., Woods, P. J., Nowacki, F., and Sieja, K.

Abstract

Excited states in Ag-96 were populated in fragmentation of an 850-MeV/u Xe-124 beam on a 4-g/cm(2) Be target. Three new high-spin isomers were identified and the structure of the populated states was investigated. The level scheme of Ag-96 was established, and a spin parity of (13(-)), (15(+)), and (19(+)) was assigned to the new isomeric states. Shell-model calculations were performed in various model spaces, including pi nu(p(1/2), g(9/2), f(5/2), p(3/2)) and the large-scale shell-model space pi nu(gds), to account for the observed parity changing M2 and E3 transitions from the (13(-)) isomer and the E2 and E4 transitions from the (19(+)) core-excited isomer, respectively. The calculated level schemes and reduced transition strengths are found to be in very good agreement with the experiment.

Published
2011

10. Observation of a new high-spin isomer in Pd-94

Author

Brock, T. S., Singh, B. S. Nara, Boutachkov, P., Braun, N., Blazhev, A., Liu, Z., Wadsworth, R., Gorska, M., Grawe, H., Pietri, S., Domingo-Pardo, C., Rudolph, D., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Engert, T., Eppinger, K., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhaeuser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojuharov, I., Kruecken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, Johan, Pfuetzner, M., Prochazka, A., Podolyak, Zs, Regan, P. H., Reiter, P., Rinta-Antila, S., Schaffner, H., Scholl, C., Söderström, Pär-Anders, Warr, N., Weick, H., Wollersheim, H. -J, Woods, P. J., Brock, T. S., Singh, B. S. Nara, Boutachkov, P., Braun, N., Blazhev, A., Liu, Z., Wadsworth, R., Gorska, M., Grawe, H., Pietri, S., Domingo-Pardo, C., Rudolph, D., Steer, S. J., Atac, A., Bettermann, L., Caceres, L., Engert, T., Eppinger, K., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhaeuser, R., Goel, N., Gottardo, A., Grebosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaskas, A., Kojuharov, I., Kruecken, R., Kurz, N., Merchan, E., Nociforo, C., Nyberg, Johan, Pfuetzner, M., Prochazka, A., Podolyak, Zs, Regan, P. H., Reiter, P., Rinta-Antila, S., Schaffner, H., Scholl, C., Söderström, Pär-Anders, Warr, N., Weick, H., Wollersheim, H. -J, and Woods, P. J.

Abstract

A second gamma-decaying high-spin isomeric state, with a half-life of 197(22) ns, has been identified in the N = Z + 2 nuclide Pd-94 as part of a stopped-beam Rare Isotope Spectroscopic INvestigation at GSI (RISING) experiment. Weisskopf estimates were used to establish a tentative spin/parity of 19(-), corresponding to the maximum possible spin of a negative parity state in the restricted (p(1/2), g(9/2)) model space of empirical shell model calculations. The reproduction of the E3 decay properties of the isomer required an extension of the model space to include the f (5/2) and p(3/2) orbitals using the CD-Bonn potential. This is the first time that such an extension has been required for a high-spin isomer in the vicinity of Sn-100 and reveals the importance of such orbits for understanding the decay properties of high-spin isomers in this region. However, despite the need for the extended model space for the E3 decay, the dominant configuration for the 19(-) state remains (p p(1/2)(-1)g(9/2)(-3))(11)circle times(nu g(9/2)(-2))(8). The half-life of the known, 14(+), isomer was remeasured and yielded a value of 499(13) ns.

Published
2010
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11. Observation of a new high-spin isomer in $^{94}\mathrm{Pd}$

Author

Brock, T. S., Nara Singh, B. S., Boutachkov, P., Braun, N., Blazhev, A., Liu, Z., Wadsworth, R., Górska, M., Grawe, H., Pietri, S., Domingo-Pardo, C., Rudolph, D., Steer, S. J., Ataç, A., Bettermann, L., Cáceres, L., Engert, T., Eppinger, K., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhäuser, R., Goel, N., Gottardo, A., Grębosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaşkaş, A., Kojuharov, I., Krücken, R., Kurz, N., Merchán, E., Nociforo, C., Nyberg, Johan, Pfützner, M., Prochazka, A., Podolyák, Zs., Regan, P. H., Reiter, P., Rinta-Antila, S., Schaffner, H., Scholl, C., Söderström, P. -A, Warr, N., Weick, H., Wollersheim, H. -J, Woods, P. J., Brock, T. S., Nara Singh, B. S., Boutachkov, P., Braun, N., Blazhev, A., Liu, Z., Wadsworth, R., Górska, M., Grawe, H., Pietri, S., Domingo-Pardo, C., Rudolph, D., Steer, S. J., Ataç, A., Bettermann, L., Cáceres, L., Engert, T., Eppinger, K., Faestermann, T., Farinon, F., Finke, F., Geibel, K., Gerl, J., Gernhäuser, R., Goel, N., Gottardo, A., Grębosz, J., Hinke, C., Hoischen, R., Ilie, G., Iwasaki, H., Jolie, J., Kaşkaş, A., Kojuharov, I., Krücken, R., Kurz, N., Merchán, E., Nociforo, C., Nyberg, Johan, Pfützner, M., Prochazka, A., Podolyák, Zs., Regan, P. H., Reiter, P., Rinta-Antila, S., Schaffner, H., Scholl, C., Söderström, P. -A, Warr, N., Weick, H., Wollersheim, H. -J, and Woods, P. J.

Published
2010

12. Recoil-βtagging study of theN=Znucleus66As

Author

Ruotsalainen, P., primary, Scholey, C., additional, Julin, R., additional, Hauschild, K., additional, Kaneko, K., additional, Nara Singh, B. S., additional, Wadsworth, R., additional, Jenkins, D. G., additional, Brock, T. S., additional, Greenlees, P. T., additional, Henderson, J., additional, Jakobsson, U., additional, Jones, P., additional, Juutinen, S., additional, Ketelhut, S., additional, Leino, M., additional, Lumley, N. M., additional, Mason, P. J. R., additional, Nieminen, P., additional, Nyman, M., additional, Paterson, I., additional, Peura, P., additional, Procter, M. G., additional, Rahkila, P., additional, Sarén, J., additional, Sorri, J., additional, and Uusitalo, J., additional

Published
2013
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13. Influence of thenpinteraction on theβdecay of94Pd

Author

Nara Singh, B. S., primary, Brock, T. S., additional, Wadsworth, R., additional, Grawe, H., additional, Boutachkov, P., additional, Braun, N., additional, Blazhev, A., additional, Liu, Z., additional, Górska, M., additional, Pietri, S., additional, Rudolph, D., additional, Domingo-Pardo, C., additional, Steer, S. J., additional, Ataç, A., additional, Bettermann, L., additional, Cáceres, L., additional, Engert, T., additional, Faestermann, T., additional, Farinon, F., additional, Finke, F., additional, Geibel, K., additional, Gerl, J., additional, Gernhäuser, R., additional, Goel, N., additional, Gottardo, A., additional, Grębosz, J., additional, Hinke, C., additional, Hoischen, R., additional, Ilie, G., additional, Iwasaki, H., additional, Jolie, J., additional, Kaşkaş, A., additional, Kojouharov, I., additional, Krücken, R., additional, Kurz, N., additional, Merchán, E., additional, Nociforo, C., additional, Nyberg, J., additional, Pfützner, M., additional, Prochazka, A., additional, Podolyák, Zs., additional, Regan, P. H., additional, Reiter, P., additional, Rinta-Antila, S., additional, Scholl, C., additional, Schaffner, H., additional, Söderström, P.-A., additional, Warr, N., additional, Weick, H., additional, Wollersheim, H.-J., additional, Woods, P. J., additional, and Nowacki, F., additional

Published
2012
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14. Spin-gap isomer in96Cd

Author

Wadsworth, R, primary, Singh, B S Nara, additional, Liu, Z, additional, Grawe, H, additional, Brock, T S, additional, Boutachkov, P, additional, Braun, N, additional, Blazhev, A, additional, Gorska, M, additional, Pietri, S, additional, Rudolph, D, additional, Domingo-Pardo, C, additional, Steer, S J, additional, Atac, A, additional, Bettermann, L, additional, Caceres, L, additional, Eppinger, K, additional, Engert, T, additional, Faestermann, T, additional, Farinon, F, additional, Finke, F, additional, Geibel, K, additional, Gerl, J, additional, Gernhauser, R, additional, Goel, N, additional, Gottardo, A, additional, Grebosz, J, additional, Hinke, C, additional, Hoischen, R, additional, Ilie, G, additional, Iwasaki, H, additional, Jolie, J, additional, Kaskas, A, additional, Kojouharov, I, additional, Krucken, R, additional, Kurz, N, additional, Merchan, E, additional, Nociforo, C, additional, Nyberg, J, additional, Pfutzner, M, additional, Prochazka, A, additional, Podolyak, Zs, additional, Regan, P H, additional, Reiter, P, additional, Rinta-Antila, S, additional, Scholl, C, additional, Schaffner, H, additional, Soderstrom, P-A, additional, Warr, N, additional, Weick, H, additional, Wollersheim, H-J, additional, Woods, P J, additional, Nowacki, F, additional, and Sieja, K, additional

Published
2012
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15. 16+Spin-Gap Isomer inCd96

Author

Nara Singh, B. S., primary, Liu, Z., additional, Wadsworth, R., additional, Grawe, H., additional, Brock, T. S., additional, Boutachkov, P., additional, Braun, N., additional, Blazhev, A., additional, Górska, M., additional, Pietri, S., additional, Rudolph, D., additional, Domingo-Pardo, C., additional, Steer, S. J., additional, Ataç, A., additional, Bettermann, L., additional, Cáceres, L., additional, Eppinger, K., additional, Engert, T., additional, Faestermann, T., additional, Farinon, F., additional, Finke, F., additional, Geibel, K., additional, Gerl, J., additional, Gernhäuser, R., additional, Goel, N., additional, Gottardo, A., additional, Grȩbosz, J., additional, Hinke, C., additional, Hoischen, R., additional, Ilie, G., additional, Iwasaki, H., additional, Jolie, J., additional, Kaşkaş, A., additional, Kojouharov, I., additional, Krücken, R., additional, Kurz, N., additional, Merchán, E., additional, Nociforo, C., additional, Nyberg, J., additional, Pfützner, M., additional, Prochazka, A., additional, Podolyák, Zs., additional, Regan, P. H., additional, Reiter, P., additional, Rinta-Antila, S., additional, Scholl, C., additional, Schaffner, H., additional, Söderström, P.-A., additional, Warr, N., additional, Weick, H., additional, Wollersheim, H.-J., additional, Woods, P. J., additional, Nowacki, F., additional, and Sieja, K., additional

Published
2011
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16. High-spin isomers in96Ag: Excitations across theZ=38andZ=50,N=50closed shells

Author

Boutachkov, P., primary, Górska, M., additional, Grawe, H., additional, Blazhev, A., additional, Braun, N., additional, Brock, T. S., additional, Liu, Z., additional, Nara Singh, B. S., additional, Wadsworth, R., additional, Pietri, S., additional, Domingo-Pardo, C., additional, Kojouharov, I., additional, Cáceres, L., additional, Engert, T., additional, Farinon, F., additional, Gerl, J., additional, Goel, N., additional, Grbosz, J., additional, Hoischen, R., additional, Kurz, N., additional, Nociforo, C., additional, Prochazka, A., additional, Schaffner, H., additional, Steer, S. J., additional, Weick, H., additional, Wollersheim, H.-J., additional, Faestermann, T., additional, Podolyák, Zs., additional, Rudolph, D., additional, Ataç, A., additional, Bettermann, L., additional, Eppinger, K., additional, Finke, F., additional, Geibel, K., additional, Gottardo, A., additional, Hinke, C., additional, Ilie, G., additional, Iwasaki, H., additional, Jolie, J., additional, Krücken, R., additional, Merchán, E., additional, Nyberg, J., additional, Pfützner, M., additional, Regan, P. H., additional, Reiter, P., additional, Rinta-Antila, S., additional, Scholl, C., additional, Söderström, P.-A., additional, Warr, N., additional, Woods, P. J., additional, Nowacki, F., additional, and Sieja, K., additional

Published
2011
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17. Exotic nuclear studies around and below A = 100

Author

Nara Singh, B. S., primary, Wadsworth, R., additional, Boutachkov, P., additional, Blazhev, A., additional, Liu, Z., additional, Grawe, H., additional, Brock, T. S., additional, Braun, N., additional, Go, M., additional, Pietri, S., additional, Rudolph, D., additional, Domingo-Pardo, C., additional, Steer, S. J., additional, Atac, A., additional, Bettermann, L., additional, Cáceres, L., additional, Eppinger, K., additional, Engert, T., additional, Faestermann, T., additional, Farinon, F., additional, Finke, F., additional, Geibel, K., additional, Gerl, J., additional, Gernhäuser, R., additional, Goel, N., additional, Gottardo, A., additional, Grȩbosz, J., additional, Hinke, C., additional, Hoischen, R., additional, llie, G., additional, Iwasaki, H., additional, Jolie, J., additional, Kaşkaş, A., additional, Kojouharov, I., additional, Krücken, R., additional, Kurz, N., additional, Merchánt, E., additional, Nociforo, C., additional, Nyberg, J., additional, Pfützner, M., additional, Prochazka, A., additional, Podolyák, Zs., additional, Regan, P. H, additional, Reiter, P., additional, Rinta-Antila, S., additional, Scholl, C., additional, Schaffner, H., additional, Söderström, P.-A., additional, Warr, N., additional, Weick, H., additional, Wollersheim, H.-J., additional, Woods, P. J., additional, Nowacki, F., additional, Sieja, K., additional, and Blank, Bertram, additional

Published
2011
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18. A Recoil-Beta Tagging Study of N = Z nucleus [sup 66]As

Author

Ruotsalainen, P., primary, Scholey, C., additional, Wadsworth, R., additional, Jenkins, D. G., additional, Singh, B. S. Nara, additional, Brock, T. S., additional, Greenlees, P. T., additional, Jakobsson, U., additional, Jones, P., additional, Julin, R., additional, Juutinen, S., additional, Ketelhut, S., additional, Leino, M., additional, Lumley, N. M., additional, Mason, P. J. R., additional, Nieminen, P., additional, Nyman, M., additional, Paterson, I., additional, Peura, P., additional, Procter, M. G., additional, Rahkila, P., additional, Sarén, J., additional, Sorri, J., additional, Uusitalo, J., additional, Demetriou, Paraskevi, additional, Julin, Rauno, additional, and Harissopulos, Sotirios, additional

Published
2011
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19. Observation of a new high-spin isomer inPd94

Author

Brock, T. S., primary, Nara Singh, B. S., additional, Boutachkov, P., additional, Braun, N., additional, Blazhev, A., additional, Liu, Z., additional, Wadsworth, R., additional, Górska, M., additional, Grawe, H., additional, Pietri, S., additional, Domingo-Pardo, C., additional, Rudolph, D., additional, Steer, S. J., additional, Ataç, A., additional, Bettermann, L., additional, Cáceres, L., additional, Engert, T., additional, Eppinger, K., additional, Faestermann, T., additional, Farinon, F., additional, Finke, F., additional, Geibel, K., additional, Gerl, J., additional, Gernhäuser, R., additional, Goel, N., additional, Gottardo, A., additional, Grębosz, J., additional, Hinke, C., additional, Hoischen, R., additional, Ilie, G., additional, Iwasaki, H., additional, Jolie, J., additional, Kaşkaş, A., additional, Kojuharov, I., additional, Krücken, R., additional, Kurz, N., additional, Merchán, E., additional, Nociforo, C., additional, Nyberg, J., additional, Pfützner, M., additional, Prochazka, A., additional, Podolyák, Zs., additional, Regan, P. H., additional, Reiter, P., additional, Rinta-Antila, S., additional, Schaffner, H., additional, Scholl, C., additional, Söderström, P.-A., additional, Warr, N., additional, Weick, H., additional, Wollersheim, H.-J., additional, and Woods, P. J., additional

Published
2010
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20. Exotic nuclear studies around and below A = 100.

Author

Nara Singh, B. S., Wadsworth, R., Boutachkov, P., Blazhev, A., Liu, Z., Grawe, H., Brock, T. S., Braun, N., Go, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Atac, A., Bettermann, L., Cáceres, L., Eppinger, K., Engert, T., Faestermann, T., and Farinon, F.

Subjects
EXOTIC nuclei, CADMIUM isotopes, SILVER isotopes, RADIOACTIVE decay, NUCLEAR structure, MACHINE separators, NUCLEAR isomers
Abstract

A RISING experiment with an aim to study exotic Cd nuclei was carried out at GSI-FRS facility. Some preliminary results from this experiment are presented here. In particular, the β decay of 96Cd to 96Ag revealed the existence of a high spin isomer predicted a few decades ago. In this context, the structures of both these nuclei are discussed. Shell model calculations using the Gross-Frenkel interaction are used to interpret the results. [ABSTRACT FROM AUTHOR]

Published
2011
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21. Influence of the np interaction on the ß decay of 94Pd.

Author

Singh, B. S. Nara, Brock, T. S., Wadsworth, R., Grawe, H., Boutachkov, P., Braun, N., Blazhev, A., Liu, Z., Górska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Ataç, A., Bettermann, L., Cáceres, L., Engert, T., Faestermann, T., Farinon, F., and Finke, F.

Subjects
*PALLADIUM isotopes, *LASER beams, *RADIOACTIVE decay, *PHYSICS experiments, *NEUTRON-proton interactions, *PHASE transitions
Abstract

We present results from stopped beam rare isotope spectroscopic investigations at the GSI (RISING) experiment based on the detection of y-ray transitions following the ß decay of 94Pd. A comparison between the measured low-lying level scheme of 94Rh and the prediction from shell-model calculations reveals the important roles of the g7/2 and g9/2 orbitals in explaining the structural features. The low values of the Gamow-Teller strengths B(GT) can be attributed to the influence of the neutron-proton interaction, which gives rise to an increased seniority mixing for the nuclear states, thereby leading to a fragmentation of the strength to several daughter levels. These results provide further strong indications that 94Pd resides in the middle of a structural transition region in the Pd isotopes as the N = Z line is approached. [ABSTRACT FROM AUTHOR]

Published
2012
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22. A Recoil-Beta Tagging Study of N = Z nucleus 66As.

Author

Ruotsalainen, P., Scholey, C., Wadsworth, R., Jenkins, D. G., Singh, B. S. Nara, Brock, T. S., Greenlees, P. T., Jakobsson, U., Jones, P., Julin, R., Juutinen, S., Ketelhut, S., Leino, M., Lumley, N. M., Mason, P. J. R., Nieminen, P., Nyman, M., Paterson, I., Peura, P., and Procter, M. G.

Subjects
PHYSICS experiments, EXCITED state chemistry, HEAVY particles (Nuclear physics), NUCLEAR energy, RADIOACTIVE nuclear beams, SPECTROMETERS, RADIOACTIVE decay
Abstract

A Recoil-Beta Tagging (RBT) experiment was recently performed at the accelerator laboratory at the University of Jyväskylä in order to identify T = 1 excited states in the medium-heavy N = Z = 33 nucleus 66As. The fusion-evaporation reaction 28Si(40Ca,pn)66As was employed at a beam energy of 75 MeV. The experiment was carried out utilising the JUROGAM II γ-ray spectrometer in conjunction with the gas-filled recoil separator RITU and the GREAT focal plane spectrometer system. The half-lives and ordering of the two known isomeric states in 66As have been determined. In addition, several new prompt γ-ray transitions from excited states both bypassing and decaying to the isomeric states in 66As have been observed. [ABSTRACT FROM AUTHOR]

Published
2011
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23. Recoil-/β tagging study of the N = Z nucleus 66As.

Author

Ruotsalainen, P., Scholey, C., Julin, R., Hauschild, K., Kaneko, K., Nara Singh, B. S., Wadsworth, R., Jenkins, D. G., Brock, T. S., Greenlees, P. T., Henderson, J., Jakobsson, U., Jones, P., Juutinen, S., Ketelhut, S., Leino, M., Lumley, N. M., Mason, P. J. R., Nieminen, P., and Nyman, M.

Subjects
*RADIOACTIVE decay, *ISOMERS, *PHASE transitions, *NUCLEAR shell theory, *EVAPORATION (Chemistry), *NUCLEAR fusion, *EXCITED states
Abstract

An in-beam study has been performed to further investigate the known isomeric decays and to identify T = 1 excited states in the medium-heavy N = Z = 33 nucleus 66As. The fusion-evaporation reaction 40Ca(28Si,pn)66As was employed at beam energies of 75 and 83 MeV. The half-lives and ordering of two known isomeric states in 66As have been determined with improved accuracy. In addition, several prompt γ-ray transitions from excited states, both bypassing and decaying to the isomeric states in 66As, have been observed. Most importantly, candidates for the 4+ → 2+ and 6+ → 4+ transitions in the T = 1 band have been identified. The results are compared with shell-model calculations using the modern JUN45 interaction in the pf5/2g9/2 model space. [ABSTRACT FROM AUTHOR]

Published
2013
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24. 16+ Spin-Gap Isomer in 96Cd.

Author

Singh, B. S. Nara, Liu, Z., Wadsworth, R., Grawe, H., Brock, T. S., Boutachkov, E., Braun, N., Blazhev, A., Górska, M., Pietri, S., Rudolph, D., Domingo-Pardo, C., Steer, S. J., Ataç, A., Bettermann, L., Cáceres, L., Eppinger, K., Engert, T., Faestermann, T., and Farinon, F.

Subjects
*QUANTUM theory, *SPIN excitations, *NEUTRONS, *SIMULATION methods & models, *PROTONS
Abstract

A ß-decaying high-spin isomer in 96Cd, with a half-life T1/2 = 0.29 Due to image rights restrictions, multiple line equation(s) cannot be graphically displayed. S, has been established in a stopped beam rare isotope spectroscopic investigations at GSI (RISING) experiment. The nuclei were produced using the fragmentation of a primary beam of 124Xe on a 9Be target. From the half-life and the observed γ decays in the daughter nucleus, 96Ag, we conclude that the ß-decaying state is the long predicted 16+ "spin-gap" isomer. Shell-model calculations, using the Gross-Frenkel interaction and the πv(P1/2, g9/2) model space, show that the isoscalar component of the neutron-proton interaction is essential to explain the origin of the isomer. Core excitations across the N = Z = 50 gaps and the Gamow-Teller strength, B(GT) distributions have been studied via large-scale shell-model calculations using the π v(g, d, s) model space to compare with the experimental B(GT) value obtained from the half-life of the isomer. [ABSTRACT FROM AUTHOR]

Published
2011
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25. High-spin isomers in 96Ag: Excitations across the Z = 38 and Z = 50, N = 50 closed shells.

Author

Boutachkov, P., Górska, M., Grawe, H., Blazhev, A., Braun, N., Brock, T. S., Liu, Z., Nara Singh, B. S., Wadsworth, R., Pietri, S., Domingo-Pardo, C., Kojouharov, I., Cáceres, L., Engert, T., Farinon, F., Gerl, J., Goel, N., Grbosz, J., Hoischen, R., and Kurz, N.

Subjects
*NUCLEAR structure, *NUCLEAR spin, *ISOELECTRONIC sequences, *HIGH spin physics, *ENERGY levels (Quantum mechanics), *RADIOACTIVE decay, SILVER isotopes
Abstract

Excited states in 96Ag were populated in fragmentation of an an 850-MeV/u 124Xe beam on a 4-g/cm² Be target. Three new high-spin isomers were identified and the structure of the populated states was investigated. The level scheme of 96Ag was established, and a spin parity of (13-), (15+), and (19+) was assigned to the new isomeric states. Shell-model calculations were performed in various model spaces, including π v(1/2, g9/2, f5/2, P3/2) and the large-scale shell-model space πv(gds), to account for the observed parity changing M2 and E3 transitions from the (13-) isomer and the E2 and E4 transitions from the ( 19+) core-excited isomer, respectively. The calculated level schemes and reduced transition strengths are found to be in very good agreement with the experiment. [ABSTRACT FROM AUTHOR]

Published
2011
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