Observation of a new high-spin isomer in 94Pd

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

Research output: Contribution to journalArticle

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Abstract

A second γ-decaying high-spin isomeric state, with a half-life of 197(22)ns, has been identified in the N=Z+2 nuclide 94Pd 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 (p1/2, g9/2) 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 f5/2 and p3/2 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 100Sn 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 (πp−11/2g−39/2)11⊗(νg−29/2)8. The half-life of the known, 14+, isomer was remeasured and yielded a value of 499(13) ns.
Original languageEnglish
Article number061309
JournalPhysical Review C
Volume82
Issue number6
DOIs
Publication statusPublished - 30 Dec 2010
Externally publishedYes

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isomers
half life
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isotopes
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orbitals
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Brock, T. S., Nara Singh, B. S., Boutachkov, P., Braun, N., Blazhev, A., Liu, Z., ... Woods, P. (2010). Observation of a new high-spin isomer in 94Pd. Physical Review C, 82(6), [061309]. https://doi.org/10.1103/PhysRevC.82.061309
Brock, T.S. ; Nara Singh, B.S. ; 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, J. ; Pfuetzner, M. ; Prochazka, A. ; Podolyak, Zs. ; Regan, P.H. ; Reiter, P. ; Rinta-Antila, S. ; Schaffner, H. ; Scholl, C. ; Soderstrom, P.-A. ; Warr, N. ; Weick, H. ; Wollersheim, H.J. ; Woods, P. / Observation of a new high-spin isomer in 94Pd. In: Physical Review C. 2010 ; Vol. 82, No. 6.
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abstract = "A second γ-decaying high-spin isomeric state, with a half-life of 197(22)ns, has been identified in the N=Z+2 nuclide 94Pd 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 (p1/2, g9/2) 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 f5/2 and p3/2 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 100Sn 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 (πp−11/2g−39/2)11⊗(νg−29/2)8. The half-life of the known, 14+, isomer was remeasured and yielded a value of 499(13) ns.",
author = "T.S. Brock and {Nara Singh}, B.S. and P. Boutachkov and N. Braun and A. Blazhev and Z. Liu and R. Wadsworth and M. Gorska and H. Grawe and S. Pietri and C. Domingo-Pardo and D. Rudolph and S.J. Steer and A. Atac and L. Bettermann and L. Caceres and T. Engert and K. Eppinger and T. Faestermann and F. Farinon and F. Finke and K. Geibel and J. Gerl and R. Gernhaeuser and N. Goel and A. Gottardo and J. Grebosz and C. Hinke and R. Hoischen and G. Ilie and H. Iwasaki and J. Jolie and A. Kaskas and I. Kojuharov and R. Kruecken and N. Kurz and E. Merchan and C. Nociforo and J. Nyberg and M. Pfuetzner and A. Prochazka and Zs. Podolyak and P.H. Regan and P. Reiter and S. Rinta-Antila and H. Schaffner and C. Scholl and P.-A. Soderstrom and N. Warr and H. Weick and H.J. Wollersheim and P. Woods",
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Brock, TS, Nara Singh, BS, Boutachkov, P, Braun, N, Blazhev, A, Liu, Z, Wadsworth, R, Gorska, M, Grawe, H, Pietri, S, Domingo-Pardo, C, Rudolph, D, Steer, SJ, 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, J, Pfuetzner, M, Prochazka, A, Podolyak, Z, Regan, PH, Reiter, P, Rinta-Antila, S, Schaffner, H, Scholl, C, Soderstrom, P-A, Warr, N, Weick, H, Wollersheim, HJ & Woods, P 2010, 'Observation of a new high-spin isomer in 94Pd', Physical Review C, vol. 82, no. 6, 061309. https://doi.org/10.1103/PhysRevC.82.061309

Observation of a new high-spin isomer in 94Pd. / Brock, T.S.; Nara Singh, B.S.; 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, J.; Pfuetzner, M.; Prochazka, A.; Podolyak, Zs.; Regan, P.H.; Reiter, P.; Rinta-Antila, S.; Schaffner, H.; Scholl, C.; Soderstrom, P.-A.; Warr, N.; Weick, H.; Wollersheim, H.J.; Woods, P.

In: Physical Review C, Vol. 82, No. 6, 061309, 30.12.2010.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Observation of a new high-spin isomer in 94Pd

AU - Brock, T.S.

AU - Nara Singh, B.S.

AU - Boutachkov, P.

AU - Braun, N.

AU - Blazhev, A.

AU - Liu, Z.

AU - Wadsworth, R.

AU - Gorska, M.

AU - Grawe, H.

AU - Pietri, S.

AU - Domingo-Pardo, C.

AU - Rudolph, D.

AU - Steer, S.J.

AU - Atac, A.

AU - Bettermann, L.

AU - Caceres, L.

AU - Engert, T.

AU - Eppinger, K.

AU - Faestermann, T.

AU - Farinon, F.

AU - Finke, F.

AU - Geibel, K.

AU - Gerl, J.

AU - Gernhaeuser, R.

AU - Goel, N.

AU - Gottardo, A.

AU - Grebosz, J.

AU - Hinke, C.

AU - Hoischen, R.

AU - Ilie, G.

AU - Iwasaki, H.

AU - Jolie, J.

AU - Kaskas, A.

AU - Kojuharov, I.

AU - Kruecken, R.

AU - Kurz, N.

AU - Merchan, E.

AU - Nociforo, C.

AU - Nyberg, J.

AU - Pfuetzner, M.

AU - Prochazka, A.

AU - Podolyak, Zs.

AU - Regan, P.H.

AU - Reiter, P.

AU - Rinta-Antila, S.

AU - Schaffner, H.

AU - Scholl, C.

AU - Soderstrom, P.-A.

AU - Warr, N.

AU - Weick, H.

AU - Wollersheim, H.J.

AU - Woods, P.

PY - 2010/12/30

Y1 - 2010/12/30

N2 - A second γ-decaying high-spin isomeric state, with a half-life of 197(22)ns, has been identified in the N=Z+2 nuclide 94Pd 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 (p1/2, g9/2) 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 f5/2 and p3/2 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 100Sn 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 (πp−11/2g−39/2)11⊗(νg−29/2)8. The half-life of the known, 14+, isomer was remeasured and yielded a value of 499(13) ns.

AB - A second γ-decaying high-spin isomeric state, with a half-life of 197(22)ns, has been identified in the N=Z+2 nuclide 94Pd 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 (p1/2, g9/2) 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 f5/2 and p3/2 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 100Sn 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 (πp−11/2g−39/2)11⊗(νg−29/2)8. The half-life of the known, 14+, isomer was remeasured and yielded a value of 499(13) ns.

U2 - 10.1103/PhysRevC.82.061309

DO - 10.1103/PhysRevC.82.061309

M3 - Article

VL - 82

JO - Physical Review C

JF - Physical Review C

SN - 2469-9985

IS - 6

M1 - 061309

ER -

Brock TS, Nara Singh BS, Boutachkov P, Braun N, Blazhev A, Liu Z et al. Observation of a new high-spin isomer in 94Pd. Physical Review C. 2010 Dec 30;82(6). 061309. https://doi.org/10.1103/PhysRevC.82.061309