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1. Shape Changes in the Mirror Nuclei Kr70 and Se70

Author

Wimmer, K., primary, Korten, W., additional, Doornenbal, P., additional, Arici, T., additional, Aguilera, P., additional, Algora, A., additional, Ando, T., additional, Baba, H., additional, Blank, B., additional, Boso, A., additional, Chen, S., additional, Corsi, A., additional, Davies, P., additional, de Angelis, G., additional, de France, G., additional, Delaroche, J.-P., additional, Doherty, D. T., additional, Gerl, J., additional, Gernhäuser, R., additional, Girod, M., additional, Jenkins, D., additional, Koyama, S., additional, Motobayashi, T., additional, Nagamine, S., additional, Niikura, M., additional, Obertelli, A., additional, Libert, J., additional, Lubos, D., additional, Rodríguez, T. R., additional, Rubio, B., additional, Sahin, E., additional, Saito, T. Y., additional, Sakurai, H., additional, Sinclair, L., additional, Steppenbeck, D., additional, Taniuchi, R., additional, Wadsworth, R., additional, and Zielinska, M., additional

Published
2021
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2. Metastable States of Se92,94 : Identification of an Oblate K Isomer of Se94 and the Ground-State Shape Transition between N=58 and 60

Author

Lizarazo, C., primary, Söderström, P.-A., additional, Werner, V., additional, Pietralla, N., additional, Walker, P. M., additional, Dong, G. X., additional, Xu, F. R., additional, Rodríguez, T. R., additional, Browne, F., additional, Doornenbal, P., additional, Nishimura, S., additional, Niţă, C. R., additional, Obertelli, A., additional, Ando, T., additional, Arici, T., additional, Authelet, G., additional, Baba, H., additional, Blazhev, A., additional, Bruce, A. M., additional, Calvet, D., additional, Caroll, R. J., additional, Château, F., additional, Chen, S., additional, Chung, L. X., additional, Corsi, A., additional, Cortés, M. L., additional, Delbart, A., additional, Dewald, M., additional, Ding, B., additional, Flavigny, F., additional, Franchoo, S., additional, Gerl, J., additional, Gheller, J.-M., additional, Giganon, A., additional, Gillibert, A., additional, Górska, M., additional, Gottardo, A., additional, Kojouharov, I., additional, Kurz, N., additional, Lapoux, V., additional, Lee, J., additional, Lettmann, M., additional, Linh, B. D., additional, Liu, J. J., additional, Liu, Z., additional, Momiyama, S., additional, Moschner, K., additional, Motobayashi, T., additional, Nagamine, S., additional, Nakatsuka, N., additional, Niikura, M., additional, Nobs, C., additional, Olivier, L., additional, Patel, Z., additional, Paul, N., additional, Podolyák, Zs., additional, Roussé, J.-Y., additional, Rudigier, M., additional, Saito, T. Y., additional, Sakurai, H., additional, Santamaria, C., additional, Schaffner, H., additional, Shand, C., additional, Stefan, I., additional, Steppenbeck, D., additional, Taniuchi, R., additional, Uesaka, T., additional, Vaquero, V., additional, Wimmer, K., additional, and Xu, Z., additional

Published
2020
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3. Role of the Δ Resonance in the Population of a Four-Nucleon State in the Fe56→Fe54 Reaction at Relativistic Energies

Author

Podolyák, Zs., primary, Shand, C. M., additional, Lalović, N., additional, Gerl, J., additional, Rudolph, D., additional, Alexander, T., additional, Boutachkov, P., additional, Cortés, M. L., additional, Górska, M., additional, Kojouharov, I., additional, Kurz, N., additional, Louchart, C., additional, Merchán, E., additional, Michelagnoli, C., additional, Pérez-Vidal, R. M., additional, Pietri, S., additional, Ralet, D., additional, Reese, M., additional, Schaffner, H., additional, Stahl, Ch., additional, Weick, H., additional, Ameil, F., additional, de Angelis, G., additional, Arici, T., additional, Carroll, R., additional, Dombrádi, Zs., additional, Gadea, A., additional, Golubev, P., additional, Lettmann, M., additional, Lizarazo, C., additional, Mahboub, D., additional, Pai, H., additional, Patel, Z., additional, Pietralla, N., additional, Regan, P. H., additional, Sarmiento, L. G., additional, Wieland, O., additional, Wilson, E., additional, Birkenbach, B., additional, Bruyneel, B., additional, Burrows, I., additional, Charles, L., additional, Clément, E., additional, Crespi, F. C. L., additional, Cullen, D. M., additional, Désesquelles, P., additional, Eberth, J., additional, González, V., additional, Habermann, T., additional, Harkness-Brennan, L., additional, Hess, H., additional, Judson, D. S., additional, Jungclaus, A., additional, Korten, W., additional, Labiche, M., additional, Maj, A., additional, Mengoni, D., additional, Napoli, D. R., additional, Pullia, A., additional, Quintana, B., additional, Rainovski, G., additional, Reiter, P., additional, Salsac, M. D., additional, Sanchis, E., additional, and Valiente Dóbon, J. J., additional

Published
2016
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4. Coulomb excitation of 104Sn and the strength of the 100Sn shell closure

Author

Guastalla, G., DiJulio, D. D., Górska, M., Cederkäll, J., Boutachkov, P., Golubev, P., Pietri, S., Grawe, H., Nowacki, F., Sieja, K., Algora, Alejandro, Ameil, F., Arici, T., Ataç, A., Bentley, M. A., Blazhev, A., Bloor, D., Brambilla, S., Braun, N., Camera, F., Dombrádi, Zsolt, Domingo Pardo, C., Estrade, A., Farinon, F., Gerl, J., Goel, N., Grębosz, J., Habermann, T., Hoischen, R., Jansson, K., Jolie, J., Jungclaus, A., Kojouharov, I., Knoebel, R., Kumar, R., Kurcewicz, J., Kurz, N., Lalović, N., Merchan, E., Moschner, K., Naqvi, F., Nara Singh, B. S., Nyberg, J., Nociforo, C., Obertelli, A., Pfützner, M., Pietralla, N., Podolyák, Zs., Prochazka, A., Ralet, D., Reiter, P., Rudolph, D., Schaffner, H., Schirru, F., Scruton, L., Sohler, Dóra, Swaleh, T., Taprogge, Jan, Vajta, Zsolt, Wadsworth, R., Warr, N., Weick, H., Wendt, A., Wieland, O., Winfield, J. S., and Wollersheim, H. J.

Subjects
Természettudományok, Fizikai tudományok
Abstract

A measurement of the reduced transition probability for the excitation of the ground state to the first 2+ state in 104Sn has been performed using relativistic Coulomb excitation at GSI. 104Sn is the lightest isotope in the Sn chain for which this quantity has been measured. The result is a key point in the discussion of the evolution of nuclear structure in the proximity of the doubly magic nucleus 100Sn. The value B(E2; 0+ → 2+) = 0.10(4) e2b2 is significantly lower than earlier results for 106Sn and heavier isotopes. The result is well reproduced by shell model predictions and therefore indicates a robust N = Z = 50 shell closure.

Published
2013

5. Search for the pygmy dipole resonance in 68Ni at 600 MeV/nucleon

Author

Wieland, O., Bracco, A., Camera, F., Benzoni, G., Blasi, N., Brambilla, S., Crespi, F.C.L., Leoni, S., Million, B., Nicolini, R., M. Maj, A., Bednarczyk, P., Grebosz, J., Kmiecik, M., Meczynski, W., Styczen, J., Aumann, T., Banu, A., Beck, T., Becker, F., Caceres, L., Doornenbal, P., Emling, H., Gerl, J., Geissel, H., Gorska, M., Kavatsyuk, O., Kavatsyuk, M., Kojouharov, I., Kurz, N., Lozeva, R., Saito, N., Saito, T, Schaffner, H., Wollersheim, H.J., Jolie, J., Reiter, P., Warr, N., Angelis, A.L.S., Gadea, A., Napoli, D.J., Lenzi, S., Lunardi, S., Balabanski, D.L., LoBianco, G., Petrache, C.M., Saltarelli, A., Castoldi, M., Zucchiatti, A., Walker, J., Burger, A., and KVI - Center for Advanced Radiation Technology

Abstract

The gamma decay from Coulomb excitation of 68Ni at 600 MeV/nucleon on a Au target was measured using the RISING setup at the fragment separator of GSI. The 68Ni beam was produced by a fragmentation reaction of 86Kr at 900 MeV/nucleon on a 9Be target and selected by the fragment separator. The gamma rays produced at the Au target were measured with HPGe detectors at forward angles and with BaF2 scintillators at backward angles. The measured spectra show a peak centered at approximately 11 MeV, whose intensity can be explained in terms of an enhanced strength of the dipole response function (pygmy resonance). Such pygmy structure has been predicted in this unstable neutron-rich nucleus by theory.

Published
2008

6. 'Safe' Coulomb excitation of 30Mg

Author

Niedermaier, O., Scheit, H., Bildstein, V., Boie, H., Fitting, J., von Hahn, R., Kock, F., Lauer, M., Pal, U.K., Podlech, H., Repnow, R., Schwalm, D., Alvarez, C., Ames, F., Bollen, G., Emhofer, S., Habs, D., Kester, O., Lutter, R., Rudolph, K., Pasini, M., Thirolf, P.G., Wolf, B.H., Eberth, J., Gersch, G., Hess, H., Reiter, P., Thelen, O., Warr, N., Weisshaar, D., Aksouh, F., Van den Bergh, P., Van Duppen, P., Huyse, M., Ivanov, O., Mayet, P., Van de Walle, J., Aysto, J., Butler, P.A., Cederkall, J., Delahaye, P., Fynbo, H.O.U., Fraile, L.M., Forstner, O., Franchoo, S., Koster, U., Nilsson, T., Oinonen, M., Sieber, T., Wenander, F., Pantea, M., Richter, A., Schrieder, G., Simon, H., Behrens, T., Gernhauser, R., Kroll, T., Krucken, R., Munch, M., Davinson, T., Gerl, J., Huber, G., Hurst, A., Iwanicki, J., Jonson, B., Lieb, P., Liljeby, L., Schempp, A., Scherillo, A., Schmidt, P., Walter, G., Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), ISOLDE, Amsterdam institute for Infection and Immunity, Pulmonology, and Heyd, Yvette

Subjects
[PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex], Coulomb excitation, FOS: Physical sciences, Physics::Accelerator Physics, Nuclear Physics - Experiment, 25.70.De, 27.30.+t, 21.10.Re, Nuclear Experiment (nucl-ex), [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment, Collective levels, 20 < A < 38, Radioactive beams
Abstract

We report on the first radioactive beam experiment performed at the recently commissioned REX-ISOLDE facility at CERN in conjunction with the highly efficient $\gamma$ -spectrometer MINIBALL. Using $^{30}$Mg ions accelerated to an energy of 2.25MeV/u together with a thin $^{nat}$Ni target, Coulomb excitation of the first excited 2+ states of the projectile and target nuclei well below the Coulomb barrier was observed. From the measured relative de-excitation $\gamma$ -ray yields the B(E2; 0$^{+}_{gs} \rightarrow 2^{+}_{1}$) value of $^{30}$Mg was determined to be 241(31)$e^{2}$fm$^{4}$. Our result is lower than values obtained at projectile fragmenttion facilities using the intermediate-energy Coulomb excitation method and confirms that the theoretical conjecture that the neutron-rich magnesium isotope $^{30}$Mg lies still outside the "island of inversion". We report on the first radioactive beam experiment performed at the recently commissioned REX-ISOLDE facility at CERN in conjunction with the highly efficient gamma spectrometer MINIBALL. Using 30Mg ions accelerated to an energy of 2.25 MeV/u together with a thin nat-Ni target, Coulomb excitation of the first excited 2+ states of the projectile and target nuclei well below the Coulomb barrier was observed. From the measured relative de-excitation gamma ray yields the B(E2: 0+ -> 2+) value of 30Mg was determined to be 241(31) e2fm4. Our result is lower than values obtained at projectile fragmentation facilities using the intermediate-energy Coulomb excitation method, and confirms the theoretical conjecture that the neutron-rich magnesium isotope 30Mg lies still outside the ``island of inversion''.

Published
2004

7. Hindered Gamow-Teller Decay to the Odd-OddN=ZGa62: Absence of Proton-NeutronT=0Condensate inA=62

Author

Grodner, E., primary, Gadea, A., additional, Sarriguren, P., additional, Lenzi, S. M., additional, Gre¸bosz, J., additional, Valiente-Dobón, J. J., additional, Algora, A., additional, Górska, M., additional, Regan, P. H., additional, Rudolph, D., additional, de Angelis, G., additional, Agramunt, J., additional, Alkhomashi, N., additional, Amon Susam, L., additional, Bazzacco, D., additional, Benlliure, J., additional, Benzoni, G., additional, Boutachkov, P., additional, Bracco, A., additional, Caceres, L., additional, Cakirli, R. B., additional, Crespi, F. C. L., additional, Domingo-Pardo, C., additional, Doncel, M., additional, Dombrádi, Zs., additional, Doornenbal, P., additional, Farnea, E., additional, Ganioğlu, E., additional, Gelletly, W., additional, Gerl, J., additional, Gottardo, A., additional, Hüyük, T., additional, Kurz, N., additional, Leoni, S., additional, Mengoni, D., additional, Molina, F., additional, Morales, A. I., additional, Orlandi, R., additional, Oktem, Y., additional, Page, R. D., additional, Perez, D., additional, Pietri, S., additional, Podolyák, Zs., additional, Poves, A., additional, Quintana, B., additional, Rinta-Antila, S., additional, Rubio, B., additional, Nara Singh, B. S., additional, Steer, A. N., additional, Verma, S., additional, Wadsworth, R., additional, Wieland, O., additional, and Wollersheim, H. J., additional

Published
2014
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8. Half-Life Systematics across theN=126Shell Closure: Role of First-Forbidden Transitions in theβDecay of Heavy Neutron-Rich Nuclei

Author

Morales, A. I., primary, Benlliure, J., additional, Kurtukián-Nieto, T., additional, Schmidt, K.-H, additional, Verma, S., additional, Regan, P. H., additional, Podolyák, Z., additional, Górska, M., additional, Pietri, S., additional, Kumar, R., additional, Casarejos, E., additional, Al-Dahan, N., additional, Algora, A., additional, Alkhomashi, N., additional, Álvarez-Pol, H., additional, Benzoni, G., additional, Blazhev, A., additional, Boutachkov, P., additional, Bruce, A. M., additional, Cáceres, L. S., additional, Cullen, I. J., additional, Denis Bacelar, A. M., additional, Doornenbal, P., additional, Estévez-Aguado, M. E., additional, Farrelly, G., additional, Fujita, Y., additional, Garnsworthy, A. B., additional, Gelletly, W., additional, Gerl, J., additional, Grebosz, J., additional, Hoischen, R., additional, Kojouharov, I., additional, Kurz, N., additional, Lalkovski, S., additional, Liu, Z., additional, Mihai, C., additional, Molina, F., additional, Mücher, D., additional, Rubio, B., additional, Shaffner, H., additional, Steer, S. J., additional, Tamii, A., additional, Tashenov, S., additional, Valiente-Dobón, J. J., additional, Walker, P. M., additional, Wollersheim, H. J., additional, and Woods, P. J., additional

Published
2014
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9. Spectroscopy of Element 115 Decay Chains

Author

Rudolph, D., primary, Forsberg, U., additional, Golubev, P., additional, Sarmiento, L. G., additional, Yakushev, A., additional, Andersson, L.-L., additional, Di Nitto, A., additional, Düllmann, Ch. E., additional, Gates, J. M., additional, Gregorich, K. E., additional, Gross, C. J., additional, Heßberger, F. P., additional, Herzberg, R.-D., additional, Khuyagbaatar, J., additional, Kratz, J. V., additional, Rykaczewski, K., additional, Schädel, M., additional, Åberg, S., additional, Ackermann, D., additional, Block, M., additional, Brand, H., additional, Carlsson, B. G., additional, Cox, D., additional, Derkx, X., additional, Eberhardt, K., additional, Even, J., additional, Fahlander, C., additional, Gerl, J., additional, Jäger, E., additional, Kindler, B., additional, Krier, J., additional, Kojouharov, I., additional, Kurz, N., additional, Lommel, B., additional, Mistry, A., additional, Mokry, C., additional, Nitsche, H., additional, Omtvedt, J. P., additional, Papadakis, P., additional, Ragnarsson, I., additional, Runke, J., additional, Schaffner, H., additional, Schausten, B., additional, Thörle-Pospiech, P., additional, Torres, T., additional, Traut, T., additional, Trautmann, N., additional, Türler, A., additional, Ward, A., additional, Ward, D. E., additional, and Wiehl, N., additional

Published
2013
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10. Coulomb Excitation ofSn104and the Strength of theSn100Shell Closure

Author

Guastalla, G., primary, DiJulio, D. D., additional, Górska, M., additional, Cederkäll, J., additional, Boutachkov, P., additional, Golubev, P., additional, Pietri, S., additional, Grawe, H., additional, Nowacki, F., additional, Sieja, K., additional, Algora, A., additional, Ameil, F., additional, Arici, T., additional, Atac, A., additional, Bentley, M. A., additional, Blazhev, A., additional, Bloor, D., additional, Brambilla, S., additional, Braun, N., additional, Camera, F., additional, Dombrádi, Zs., additional, Domingo Pardo, C., additional, Estrade, A., additional, Farinon, F., additional, Gerl, J., additional, Goel, N., additional, Grȩbosz, J., additional, Habermann, T., additional, Hoischen, R., additional, Jansson, K., additional, Jolie, J., additional, Jungclaus, A., additional, Kojouharov, I., additional, Knoebel, R., additional, Kumar, R., additional, Kurcewicz, J., additional, Kurz, N., additional, Lalović, N., additional, Merchan, E., additional, Moschner, K., additional, Naqvi, F., additional, Nara Singh, B. S., additional, Nyberg, J., additional, Nociforo, C., additional, Obertelli, A., additional, Pfützner, M., additional, Pietralla, N., additional, Podolyák, Z., additional, Prochazka, A., additional, Ralet, D., additional, Reiter, P., additional, Rudolph, D., additional, Schaffner, H., additional, Schirru, F., additional, Scruton, L., additional, Sohler, D., additional, Swaleh, T., additional, Taprogge, J., additional, Vajta, Zs., additional, Wadsworth, R., additional, Warr, N., additional, Weick, H., additional, Wendt, A., additional, Wieland, O., additional, Winfield, J. S., additional, and Wollersheim, H. J., additional

Published
2013
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11. Direct Observation of Long-Lived Isomers inBi212

Author

Chen, L., primary, Walker, P. M., additional, Geissel, H., additional, Litvinov, Yu. A., additional, Beckert, K., additional, Beller, P., additional, Bosch, F., additional, Boutin, D., additional, Caceres, L., additional, Carroll, J. J., additional, Cullen, D. M., additional, Cullen, I. J., additional, Franzke, B., additional, Gerl, J., additional, Górska, M., additional, Jones, G. A., additional, Kishada, A., additional, Knöbel, R., additional, Kozhuharov, C., additional, Kurcewicz, J., additional, Litvinov, S. A., additional, Liu, Z., additional, Mandal, S., additional, Montes, F., additional, Münzenberg, G., additional, Nolden, F., additional, Ohtsubo, T., additional, Patyk, Z., additional, Plaß, W. R., additional, Podolyák, Zs., additional, Rigby, S., additional, Saito, N., additional, Saito, T., additional, Scheidenberger, C., additional, Simpson, E. C., additional, Shindo, M., additional, Steck, M., additional, Sun, B., additional, Williams, S. J., additional, Weick, H., additional, Winkler, M., additional, Wollersheim, H.-J., additional, and Yamaguchi, T., additional

Published
2013
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12. New Isomers in the Full Seniority Scheme of Neutron-Rich Lead Isotopes: The Role of Effective Three-Body Forces

Author

Gottardo, A., primary, Valiente-Dobón, J. J., additional, Benzoni, G., additional, Nicolini, R., additional, Gadea, A., additional, Lunardi, S., additional, Boutachkov, P., additional, Bruce, A. M., additional, Górska, M., additional, Grebosz, J., additional, Pietri, S., additional, Podolyák, Zs., additional, Pfützner, M., additional, Regan, P. H., additional, Weick, H., additional, Alcántara Núñez, J., additional, Algora, A., additional, Al-Dahan, N., additional, de Angelis, G., additional, Ayyad, Y., additional, Alkhomashi, N., additional, Allegro, P. R. P., additional, Bazzacco, D., additional, Benlliure, J., additional, Bowry, M., additional, Bracco, A., additional, Bunce, M., additional, Camera, F., additional, Casarejos, E., additional, Cortes, M. L., additional, Crespi, F. C. L., additional, Corsi, A., additional, Denis Bacelar, A. M., additional, Deo, A. Y., additional, Domingo-Pardo, C., additional, Doncel, M., additional, Dombradi, Zs., additional, Engert, T., additional, Eppinger, K., additional, Farrelly, G. F., additional, Farinon, F., additional, Farnea, E., additional, Geissel, H., additional, Gerl, J., additional, Goel, N., additional, Gregor, E., additional, Habermann, T., additional, Hoischen, R., additional, Janik, R., additional, Klupp, S., additional, Kojouharov, I., additional, Kurz, N., additional, Lenzi, S. M., additional, Leoni, S., additional, Mandal, S., additional, Menegazzo, R., additional, Mengoni, D., additional, Million, B., additional, Morales, A. I., additional, Napoli, D. R., additional, Naqvi, F., additional, Nociforo, C., additional, Prochazka, A., additional, Prokopowicz, W., additional, Recchia, F., additional, Ribas, R. V., additional, Reed, M. W., additional, Rudolph, D., additional, Sahin, E., additional, Schaffner, H., additional, Sharma, A., additional, Sitar, B., additional, Siwal, D., additional, Steiger, K., additional, Strmen, P., additional, Swan, T. P. D., additional, Szarka, I., additional, Ur, C. A., additional, Walker, P. M., additional, Wieland, O., additional, Wollersheim, H-J., additional, Nowacki, F., additional, Maglione, E., additional, and Zuker, A. P., additional

Published
2012
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13. 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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14. One-Neutron Removal Measurement RevealsO24as a New Doubly Magic Nucleus

Author

Kanungo, R., primary, Nociforo, C., additional, Prochazka, A., additional, Aumann, T., additional, Boutin, D., additional, Cortina-Gil, D., additional, Davids, B., additional, Diakaki, M., additional, Farinon, F., additional, Geissel, H., additional, Gernhäuser, R., additional, Gerl, J., additional, Janik, R., additional, Jonson, B., additional, Kindler, B., additional, Knöbel, R., additional, Krücken, R., additional, Lantz, M., additional, Lenske, H., additional, Litvinov, Y., additional, Lommel, B., additional, Mahata, K., additional, Maierbeck, P., additional, Musumarra, A., additional, Nilsson, T., additional, Otsuka, T., additional, Perro, C., additional, Scheidenberger, C., additional, Sitar, B., additional, Strmen, P., additional, Sun, B., additional, Szarka, I., additional, Tanihata, I., additional, Utsuno, Y., additional, Weick, H., additional, and Winkler, M., additional

Published
2009
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15. Publisher’s Note: Schottky Mass Measurement of theHg208Isotope: Implication for the Proton-Neutron Interaction Strength around Doubly MagicPb208[Phys. Rev. Lett.102, 122503 (2009)]

Author

Chen, L., primary, Litvinov, Yu. A., additional, Plaß, W. R., additional, Beckert, K., additional, Beller, P., additional, Bosch, F., additional, Boutin, D., additional, Caceres, L., additional, Cakirli, R. B., additional, Carroll, J. J., additional, Casten, R. F., additional, Chakrawarthy, R. S., additional, Cullen, D. M., additional, Cullen, I. J., additional, Franzke, B., additional, Geissel, H., additional, Gerl, J., additional, Górska, M., additional, Jones, G. A., additional, Kishada, A., additional, Knöbel, R., additional, Kozhuharov, C., additional, Litvinov, S. A., additional, Liu, Z., additional, Mandal, S., additional, Montes, F., additional, Münzenberg, G., additional, Nolden, F., additional, Ohtsubo, T., additional, Patyk, Z., additional, Podolyák, Zs., additional, Propri, R., additional, Rigby, S., additional, Saito, N., additional, Saito, T., additional, Scheidenberger, C., additional, Shindo, M., additional, Steck, M., additional, Ugorowski, P., additional, Walker, P. M., additional, Williams, S., additional, Weick, H., additional, Winkler, M., additional, Wollersheim, H.-J., additional, and Yamaguchi, T., additional

Published
2009
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16. Schottky Mass Measurement of theHg208Isotope: Implication for the Proton-Neutron Interaction Strength around Doubly MagicPb208

Author

Chen, L., primary, Litvinov, Yu. A., additional, Plaß, W. R., additional, Beckert, K., additional, Beller, P., additional, Bosch, F., additional, Boutin, D., additional, Caceres, L., additional, Cakirli, R. B., additional, Carroll, J. J., additional, Casten, R. F., additional, Chakrawarthy, R. S., additional, Cullen, D. M., additional, Cullen, I. J., additional, Franzke, B., additional, Geissel, H., additional, Gerl, J., additional, Górska, M., additional, Jones, G. A., additional, Kishada, A., additional, Knöbel, R., additional, Kozhuharov, C., additional, Litvinov, S. A., additional, Liu, Z., additional, Mandal, S., additional, Montes, F., additional, Münzenberg, G., additional, Nolden, F., additional, Ohtsubo, T., additional, Patyk, Z., additional, Podolyák, Zs., additional, Propri, R., additional, Rigby, S., additional, Saito, N., additional, Saito, T., additional, Scheidenberger, C., additional, Shindo, M., additional, Steck, M., additional, Ugorowski, P., additional, Walker, P. M., additional, Williams, S., additional, Weick, H., additional, Winkler, M., additional, Wollersheim, H.-J., additional, and Yamaguchi, T., additional

Published
2009
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17. Search for the Pygmy Dipole Resonance inNi68at600MeV/nucleon

Author

Wieland, O., primary, Bracco, A., additional, Camera, F., additional, Benzoni, G., additional, Blasi, N., additional, Brambilla, S., additional, Crespi, F. C. L., additional, Leoni, S., additional, Million, B., additional, Nicolini, R., additional, Maj, A., additional, Bednarczyk, P., additional, Grebosz, J., additional, Kmiecik, M., additional, Meczynski, W., additional, Styczen, J., additional, Aumann, T., additional, Banu, A., additional, Beck, T., additional, Becker, F., additional, Caceres, L., additional, Doornenbal, P., additional, Emling, H., additional, Gerl, J., additional, Geissel, H., additional, Gorska, M., additional, Kavatsyuk, O., additional, Kavatsyuk, M., additional, Kojouharov, I., additional, Kurz, N., additional, Lozeva, R., additional, Saito, N., additional, Saito, T., additional, Schaffner, H., additional, Wollersheim, H. J., additional, Jolie, J., additional, Reiter, P., additional, Warr, N., additional, deAngelis, G., additional, Gadea, A., additional, Napoli, D., additional, Lenzi, S., additional, Lunardi, S., additional, Balabanski, D., additional, LoBianco, G., additional, Petrache, C., additional, Saltarelli, A., additional, Castoldi, M., additional, Zucchiatti, A., additional, Walker, J., additional, and Bürger, A., additional

Published
2009
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18. Observation of Isomeric Decays in ther-Process Waiting-Point NucleusCd82130

Author

Jungclaus, A., primary, Cáceres, L., additional, Górska, M., additional, Pfützner, M., additional, Pietri, S., additional, Werner-Malento, E., additional, Grawe, H., additional, Langanke, K., additional, Martínez-Pinedo, G., additional, Nowacki, F., additional, Poves, A., additional, Cuenca-García, J. J., additional, Rudolph, D., additional, Podolyak, Z., additional, Regan, P. H., additional, Detistov, P., additional, Lalkovski, S., additional, Modamio, V., additional, Walker, J., additional, Bednarczyk, P., additional, Doornenbal, P., additional, Geissel, H., additional, Gerl, J., additional, Grebosz, J., additional, Kojouharov, I., additional, Kurz, N., additional, Prokopowicz, W., additional, Schaffner, H., additional, Wollersheim, H. J., additional, Andgren, K., additional, Benlliure, J., additional, Benzoni, G., additional, Bruce, A. M., additional, Casarejos, E., additional, Cederwall, B., additional, Crespi, F. C. L., additional, Hadinia, B., additional, Hellström, M., additional, Hoischen, R., additional, Ilie, G., additional, Jolie, J., additional, Khaplanov, A., additional, Kmiecik, M., additional, Kumar, R., additional, Maj, A., additional, Mandal, S., additional, Montes, F., additional, Myalski, S., additional, Simpson, G. S., additional, Steer, S. J., additional, Tashenov, S., additional, and Wieland, O., additional

Published
2007
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19. “Safe” Coulomb Excitation ofMg30

Author

Niedermaier, O., primary, Scheit, H., additional, Bildstein, V., additional, Boie, H., additional, Fitting, J., additional, von Hahn, R., additional, Köck, F., additional, Lauer, M., additional, Pal, U. K., additional, Podlech, H., additional, Repnow, R., additional, Schwalm, D., additional, Alvarez, C., additional, Ames, F., additional, Bollen, G., additional, Emhofer, S., additional, Habs, D., additional, Kester, O., additional, Lutter, R., additional, Rudolph, K., additional, Pasini, M., additional, Thirolf, P. G., additional, Wolf, B. H., additional, Eberth, J., additional, Gersch, G., additional, Hess, H., additional, Reiter, P., additional, Thelen, O., additional, Warr, N., additional, Weisshaar, D., additional, Aksouh, F., additional, Van den Bergh, P., additional, Van Duppen, P., additional, Huyse, M., additional, Ivanov, O., additional, Mayet, P., additional, Van de Walle, J., additional, Äystö, J., additional, Butler, P. A., additional, Cederkäll, J., additional, Delahaye, P., additional, Fynbo, H. O. U., additional, Fraile, L. M., additional, Forstner, O., additional, Franchoo, S., additional, Köster, U., additional, Nilsson, T., additional, Oinonen, M., additional, Sieber, T., additional, Wenander, F., additional, Pantea, M., additional, Richter, A., additional, Schrieder, G., additional, Simon, H., additional, Behrens, T., additional, Gernhäuser, R., additional, Kröll, T., additional, Krücken, R., additional, Münch, M., additional, Davinson, T., additional, Gerl, J., additional, Huber, G., additional, Hurst, A., additional, Iwanicki, J., additional, Jonson, B., additional, Lieb, P., additional, Liljeby, L., additional, Schempp, A., additional, Scherillo, A., additional, Schmidt, P., additional, and Walter, G., additional

Published
2005
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20. Shell Structure of the Near-Dripline NucleusO23

Author

Cortina-Gil, D., primary, Fernandez-Vazquez, J., additional, Aumann, T., additional, Baumann, T., additional, Benlliure, J., additional, Borge, M. J. G., additional, Chulkov, L. V., additional, Datta Pramanik, U., additional, Forssén, C., additional, Fraile, L. M., additional, Geissel, H., additional, Gerl, J., additional, Hammache, F., additional, Itahashi, K., additional, Janik, R., additional, Jonson, B., additional, Mandal, S., additional, Markenroth, K., additional, Meister, M., additional, Mocko, M., additional, Münzenberg, G., additional, Ohtsubo, T., additional, Ozawa, A., additional, Prezado, Y., additional, Pribora, V., additional, Riisager, K., additional, Scheit, H., additional, Schneider, R., additional, Schrieder, G., additional, Simon, H., additional, Sitar, B., additional, Stolz, A., additional, Strmen, P., additional, Sümmerer, K., additional, Szarka, I., additional, and Weick, H., additional

Published
2004
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21. Coulomb Excitation Paths of High-KIsomer Bands inH178f

Author

Hayes, A. B., primary, Cline, D., additional, Wu, C. Y., additional, Simon, M. W., additional, Teng, R., additional, Gerl, J., additional, Schlegel, Ch., additional, Wollersheim, H. J., additional, Macchiavelli, A. O., additional, Vetter, K., additional, Napiorkowski, P., additional, and Srebrny, J., additional

Published
2002
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22. Conversion Electron Cascades inN102254o

Author

Butler, P. A., primary, Humphreys, R. D., additional, Greenlees, P. T., additional, Herzberg, R.-D., additional, Jenkins, D. G., additional, Jones, G. D., additional, Kankaanpää, H., additional, Kettunen, H., additional, Rahkila, P., additional, Scholey, C., additional, Uusitalo, J., additional, Amzal, N., additional, Bastin, J. E., additional, Brew, P. M. T., additional, Eskola, K., additional, Gerl, J., additional, Hammond, N. J., additional, Hauschild, K., additional, Helariutta, K., additional, Heßberger, F.-P., additional, Hürstel, A., additional, Jones, P. M., additional, Julin, R., additional, Juutinen, S., additional, Keenan, A., additional, Khoo, T.-L., additional, Korten, W., additional, Kuusiniemi, P., additional, Le Coz, Y., additional, Leino, M., additional, Leppänen, A.-P., additional, Muikku, M., additional, Nieminen, P., additional, Ødegård, S. W., additional, Page, T., additional, Pakarinen, J., additional, Reiter, P., additional, Sletten, G., additional, Theisen, Ch., additional, and Wollersheim, H.-J., additional

Published
2002
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24. Direct Observation of Long-Lived Isomers in 212Bi.

Author

Chen, L., Walker, P. M., Geissel, H., Litvinov, Yu. A., Beckert, K., Beller, P., Bosch, F., Boutin, D., Caceres, L., Carroll, J. J., Cullen, D. M., Cullen, I. J., Franzke, B., Gerl, J., Górska, M., Jones, G. A., Kishada, A., Knöbel, R., Kozhuharov, C., and Kurcewicz, J.

Subjects
*ISOMERS, *NUCLEAR fragmentation, *PARTICLES (Nuclear physics), *NUCLEAR excitation, *STORAGE rings
Abstract

Long-lived isomers in 212Bi have been studied following 238U projectile fragmentation at 670 MeV per nucleon. The fragmentation products were injected as highly charged ions into a storage ring, giving access to masses and half-lives. While the excitation energy of the first isomer of 212Bi was confirmed, the second isomer was observed at 1478(30) keV, in contrast to the previously accepted value of >1910 keV. It was also found to have an extended Lorentz-corrected in-ring half-life >30 min, compared to 7.0(3) min for the neutral atom. Both the energy and half-life differences can be understood as being due a substantial, though previously unrecognized, internal decay branch for neutral atoms. Earlier shell-model calculations are now found to give good agreement with the isomer excitation energy. Furthermore, these and new calculations predict the existence of states at slightly higher energy that could facilitate isomer deexcitation studies. [ABSTRACT FROM AUTHOR]

Published
2013
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25. Shape Changes in the Mirror Nuclei ^{70}Kr and ^{70}Se.

Author

Wimmer K, Korten W, Doornenbal P, Arici T, Aguilera P, Algora A, Ando T, Baba H, Blank B, Boso A, Chen S, Corsi A, Davies P, de Angelis G, de France G, Delaroche JP, Doherty DT, Gerl J, Gernhäuser R, Girod M, Jenkins D, Koyama S, Motobayashi T, Nagamine S, Niikura M, Obertelli A, Libert J, Lubos D, Rodríguez TR, Rubio B, Sahin E, Saito TY, Sakurai H, Sinclair L, Steppenbeck D, Taniuchi R, Wadsworth R, and Zielinska M

Abstract

We studied the proton-rich T&#95;{z}=-1 nucleus ^{70}Kr through inelastic scattering at intermediate energies in order to extract the reduced transition probability, B(E2;0^{+}→2^{+}). Comparison with the other members of the A=70 isospin triplet, ^{70}Br and ^{70}Se, studied in the same experiment, shows a 3σ deviation from the expected linearity of the electromagnetic matrix elements as a function of T&#95;{z}. At present, no established nuclear structure theory can describe this observed deviation quantitatively. This is the first violation of isospin symmetry at this level observed in the transition matrix elements. A heuristic approach may explain the anomaly by a shape change between the mirror nuclei ^{70}Kr and ^{70}Se contrary to the model predictions.

Published
2021
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26. Metastable States of ^{92,94}Se: Identification of an Oblate K Isomer of ^{94}Se and the Ground-State Shape Transition between N=58 and 60.

Author

Lizarazo C, Söderström PA, Werner V, Pietralla N, Walker PM, Dong GX, Xu FR, Rodríguez TR, Browne F, Doornenbal P, Nishimura S, Niţă CR, Obertelli A, Ando T, Arici T, Authelet G, Baba H, Blazhev A, Bruce AM, Calvet D, Caroll RJ, Château F, Chen S, Chung LX, Corsi A, Cortés ML, Delbart A, Dewald M, Ding B, Flavigny F, Franchoo S, Gerl J, Gheller JM, Giganon A, Gillibert A, Górska M, Gottardo A, Kojouharov I, Kurz N, Lapoux V, Lee J, Lettmann M, Linh BD, Liu JJ, Liu Z, Momiyama S, Moschner K, Motobayashi T, Nagamine S, Nakatsuka N, Niikura M, Nobs C, Olivier L, Patel Z, Paul N, Podolyák Z, Roussé JY, Rudigier M, Saito TY, Sakurai H, Santamaria C, Schaffner H, Shand C, Stefan I, Steppenbeck D, Taniuchi R, Uesaka T, Vaquero V, Wimmer K, and Xu Z

Abstract

Here we present new information on the shape evolution of the very neutron-rich ^{92,94}Se nuclei from an isomer-decay spectroscopy experiment at the Radioactive Isotope Beam Factory at RIKEN. High-resolution germanium detectors were used to identify delayed γ rays emitted following the decay of their isomers. New transitions are reported extending the previously known level schemes. The isomeric levels are interpreted as originating from high-K quasineutron states with an oblate deformation of β∼0.25, with the high-K state in ^{94}Se being metastable and K hindered. Following this, ^{94}Se is the lowest-mass neutron-rich nucleus known to date with such a substantial K hindrance. Furthermore, it is the first observation of an oblate K isomer in a deformed nucleus. This opens up the possibility for a new region of K isomers at low Z and at oblate deformation, involving the same neutron orbitals as the prolate orbitals within the classic Z∼72 deformed hafnium region. From an interpretation of the level scheme guided by theoretical calculations, an oblate deformation is also suggested for the ^{94}Se&#95;{60} ground-state band.

Published
2020
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27. Role of the Δ Resonance in the Population of a Four-Nucleon State in the ^{56}Fe→^{54}Fe Reaction at Relativistic Energies.

Author

Podolyák Z, Shand CM, Lalović N, Gerl J, Rudolph D, Alexander T, Boutachkov P, Cortés ML, Górska M, Kojouharov I, Kurz N, Louchart C, Merchán E, Michelagnoli C, Pérez-Vidal RM, Pietri S, Ralet D, Reese M, Schaffner H, Stahl C, Weick H, Ameil F, de Angelis G, Arici T, Carroll R, Dombrádi Z, Gadea A, Golubev P, Lettmann M, Lizarazo C, Mahboub D, Pai H, Patel Z, Pietralla N, Regan PH, Sarmiento LG, Wieland O, Wilson E, Birkenbach B, Bruyneel B, Burrows I, Charles L, Clément E, Crespi FC, Cullen DM, Désesquelles P, Eberth J, González V, Habermann T, Harkness-Brennan L, Hess H, Judson DS, Jungclaus A, Korten W, Labiche M, Maj A, Mengoni D, Napoli DR, Pullia A, Quintana B, Rainovski G, Reiter P, Salsac MD, Sanchis E, and Valiente Dóbon JJ

Abstract

The ^{54}Fe nucleus was populated from a ^{56}Fe beam impinging on a Be target with an energy of E/A=500  MeV. The internal decay via γ-ray emission of the 10^{+} metastable state was observed. As the structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a simple two-neutron removal reaction from the ^{56}Fe ground state. The isomeric state was produced in the low-momentum (-energy) tail of the parallel momentum (energy) distribution of ^{54}Fe, suggesting that it was populated via the decay of the Δ^{0} resonance into a proton. This process allows the population of four-nucleon states, such as the observed isomer. Therefore, it is concluded that the observation of this 10^{+} metastable state in ^{54}Fe is a consequence of the quark structure of the nucleons.

Published
2016
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28. Hindered Gamow-Teller decay to the odd-odd N=Z (62)Ga: absence of proton-neutron T=0 condensate in A=62.

Author

Grodner E, Gadea A, Sarriguren P, Lenzi SM, Grebosz J, Valiente-Dobón JJ, Algora A, Górska M, Regan PH, Rudolph D, de Angelis G, Agramunt J, Alkhomashi N, Amon Susam L, Bazzacco D, Benlliure J, Benzoni G, Boutachkov P, Bracco A, Caceres L, Cakirli RB, Crespi FC, Domingo-Pardo C, Doncel M, Dombrádi Z, Doornenbal P, Farnea E, Ganioğlu E, Gelletly W, Gerl J, Gottardo A, Hüyük T, Kurz N, Leoni S, Mengoni D, Molina F, Morales AI, Orlandi R, Oktem Y, Page RD, Perez D, Pietri S, Podolyák Z, Poves A, Quintana B, Rinta-Antila S, Rubio B, Nara Singh BS, Steer AN, Verma S, Wadsworth R, Wieland O, and Wollersheim HJ

Abstract

Search for a new kind of superfluidity built on collective proton-neutron pairs with aligned spin is performed studying the Gamow-Teller decay of the T=1, J(π)=0+ ground state of (62)Ge into excited states of the odd-odd N=Z nucleus (62)Ga. The experiment is performed at GSI Helmholtzzentrum für Shwerionenforshung with the (62)Ge ions selected by the fragment separator and implanted in a stack of Si-strip detectors, surrounded by the RISING Ge array. A half-life of T1/2=82.9(14)  ms is measured for the (62)Ge ground state. Six excited states of (62)Ga, populated below 2.5 MeV through Gamow-Teller transitions, are identified. Individual Gamow-Teller transition strengths agree well with theoretical predictions of the interacting shell model and the quasiparticle random phase approximation. The absence of any sizable low-lying Gamow-Teller strength in the reported beta-decay experiment supports the hypothesis of a negligible role of coherent T=0 proton-neutron correlations in (62)Ga.

Published
2014
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29. Half-life systematics across the N=126 shell closure: role of first-forbidden transitions in the β decay of heavy neutron-rich nuclei.

Author

Morales AI, Benlliure J, Kurtukián-Nieto T, Schmidt KH, Verma S, Regan PH, Podolyák Z, Górska M, Pietri S, Kumar R, Casarejos E, Al-Dahan N, Algora A, Alkhomashi N, Álvarez-Pol H, Benzoni G, Blazhev A, Boutachkov P, Bruce AM, Cáceres LS, Cullen IJ, Denis Bacelar AM, Doornenbal P, Estévez-Aguado ME, Farrelly G, Fujita Y, Garnsworthy AB, Gelletly W, Gerl J, Grebosz J, Hoischen R, Kojouharov I, Kurz N, Lalkovski S, Liu Z, Mihai C, Molina F, Mücher D, Rubio B, Shaffner H, Steer SJ, Tamii A, Tashenov S, Valiente-Dobón JJ, Walker PM, Wollersheim HJ, and Woods PJ

Abstract

This Letter reports on a systematic study of β-decay half-lives of neutron-rich nuclei around doubly magic (208)Pb. The lifetimes of the 126-neutron shell isotone (204)Pt and the neighboring (200-202)Ir, (203)Pt, (204)Au are presented together with other 19 half-lives measured during the "stopped beam" campaign of the rare isotope investigations at GSI collaboration. The results constrain the main nuclear theories used in calculations of r-process nucleosynthesis. Predictions based on a statistical macroscopic description of the first-forbidden β strength reveal significant deviations for most of the nuclei with N<126. In contrast, theories including a fully microscopic treatment of allowed and first-forbidden transitions reproduce more satisfactorily the trend in the measured half-lives for the nuclei in this region, where the r-process pathway passes through during β decay back to stability.

Published
2014
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30. 16+ spin-gap isomer in 96Cd.

Author

Nara Singh BS, Liu Z, Wadsworth R, Grawe H, Brock TS, Boutachkov P, Braun N, Blazhev A, Górska M, Pietri S, Rudolph D, Domingo-Pardo C, Steer SJ, Ataç A, Bettermann L, Cáceres L, Eppinger K, Engert T, 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, Kojouharov I, Krücken R, Kurz N, Merchán E, Nociforo C, Nyberg J, Pfützner M, Prochazka A, Podolyák Z, Regan PH, Reiter P, Rinta-Antila S, Scholl C, Schaffner H, Söderström PA, Warr N, Weick H, Wollersheim HJ, Woods PJ, Nowacki F, and Sieja K

Abstract

A β-decaying high-spin isomer in (96)Cd, 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 (124)Xe on a (9)Be target. From the half-life and the observed γ decays in the daughter nucleus, (96)Ag, we conclude that the β-decaying state is the long predicted 16(+) "spin-gap" isomer. Shell-model calculations, using the Gross-Frenkel interaction and the πν(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, B(GT) distributions have been studied via large-scale shell-model calculations using the πν(g,d,s) model space to compare with the experimental B(GT) value obtained from the half-life of the isomer., (© 2011 American Physical Society)

Published
2011
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31. One-neutron removal measurement reveals 24O as a new doubly magic nucleus.

Author

Kanungo R, Nociforo C, Prochazka A, Aumann T, Boutin D, Cortina-Gil D, Davids B, Diakaki M, Farinon F, Geissel H, Gernhäuser R, Gerl J, Janik R, Jonson B, Kindler B, Knöbel R, Krücken R, Lantz M, Lenske H, Litvinov Y, Lommel B, Mahata K, Maierbeck P, Musumarra A, Nilsson T, Otsuka T, Perro C, Scheidenberger C, Sitar B, Strmen P, Sun B, Szarka I, Tanihata I, Utsuno Y, Weick H, and Winkler M

Abstract

The first measurement of the momentum distribution for one-neutron removal from (24)O at 920A MeV performed at GSI, Darmstadt is reported. The observed distribution has a width (FWHM) of 99 +/- 4 MeV/c in the projectile rest frame and a one-neutron removal cross section of 63 +/- 7 mb. The results are well explained with a nearly pure 2s&#95;{1/2} neutron spectroscopic factor of 1.74 +/- 0.19 within the eikonal model. This large s-wave probability shows a spherical shell closure thereby confirming earlier suggestions that (24)O is a new doubly magic nucleus.

Published
2009
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32. Schottky mass measurement of the 208Hg isotope: implication for the proton-neutron interaction strength around doubly magic 208Pb.

Author

Chen L, Litvinov YA, Plass WR, Beckert K, Beller P, Bosch F, Boutin D, Caceres L, Cakirli RB, Carroll JJ, Casten RF, Chakrawarthy RS, Cullen DM, Cullen IJ, Franzke B, Geissel H, Gerl J, Górska M, Jones GA, Kishada A, Knöbel R, Kozhuharov C, Litvinov SA, Liu Z, Mandal S, Montes F, Münzenberg G, Nolden F, Ohtsubo T, Patyk Z, Podolyák Z, Propri R, Rigby S, Saito N, Saito T, Scheidenberger C, Shindo M, Steck M, Ugorowski P, Walker PM, Williams S, Weick H, Winkler M, Wollersheim HJ, and Yamaguchi T

Abstract

Time-resolved Schottky mass spectrometry has been applied to uranium projectile fragments which yielded the mass value for the 208Hg (Z=80, N=128) isotope. The mass excess value of ME=-13 265(31) keV has been obtained, which has been used to determine the proton-neutron interaction strength in 210Pb, as a double difference of atomic masses. The results show a dramatic variation of the strength for lead isotopes when crossing the N=126 neutron shell closure, thus confirming the empirical predictions that this interaction strength is sensitive to the overlap of the wave functions of the last valence neutrons and protons.

Published
2009
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33. Observation of isomeric decays in the r-process waiting-point nucleus 130Cd82.

Author

Jungclaus A, Cáceres L, Górska M, Pfützner M, Pietri S, Werner-Malento E, Grawe H, Langanke K, Martínez-Pinedo G, Nowacki F, Poves A, Cuenca-García JJ, Rudolph D, Podolyak Z, Regan PH, Detistov P, Lalkovski S, Modamio V, Walker J, Bednarczyk P, Doornenbal P, Geissel H, Gerl J, Grebosz J, Kojouharov I, Kurz N, Prokopowicz W, Schaffner H, Wollersheim HJ, Andgren K, Benlliure J, Benzoni G, Bruce AM, Casarejos E, Cederwall B, Crespi FC, Hadinia B, Hellström M, Hoischen R, Ilie G, Jolie J, Khaplanov A, Kmiecik M, Kumar R, Maj A, Mandal S, Montes F, Myalski S, Simpson GS, Steer SJ, Tashenov S, and Wieland O

Abstract

The gamma decay of excited states in the waiting-point nucleus (130)Cd(82) has been observed for the first time. An 8(+) two-quasiparticle isomer has been populated both in the fragmentation of a (136)Xe beam as well as in projectile fission of 238U, making (130)Cd the most neutron-rich N = 82 isotone for which information about excited states is available. The results, interpreted using state-of-the-art nuclear shell-model calculations, show no evidence of an N = 82 shell quenching at Z = 48. They allow us to follow nuclear isomerism throughout a full major neutron shell from (98)Cd(50) to (130)Cd(82) and reveal, in comparison with (76)Ni(48) one major proton shell below, an apparently abnormal scaling of nuclear two-body interactions.

Published
2007
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34. Breakdown of K selection in 178Hf.

Author

Hayes AB, Cline D, Wu CY, Ai J, Amro H, Beausang C, Casten RF, Gerl J, Hecht AA, Heinz A, Hughes R, Janssens RV, Lister CJ, Macchiavelli AO, Meyer DA, Moore EF, Napiorkowski P, Pardo RC, Schlegel Ch, Seweryniak D, Simon MW, Srebrny J, Teng R, Vetter K, and Wollersheim HJ

Abstract

Coulomb activation of the four quasiparticle Kpi=16+ 178Hf isomer (t1/2=31 y) has led to the measurement of a set of Elamda matrix elements coupling the isomer band to the ground band. The present data combined with earlier 178 Hf Coulomb excitation data have probed the components in the wave functions and revealed the onset and saturation of K mixing in low-K bands, whereas the mixing is negligible in the high-K bands. The implications can be applied to other quadrupole-deformed nuclei.

Published
2006
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35. Coulomb excitation paths of high-K isomer bands in 178Hf.

Author

Hayes AB, Cline D, Wu CY, Simon MW, Teng R, Gerl J, Schlegel Ch, Wollersheim HJ, Macchiavelli AO, Vetter K, Napiorkowski P, and Srebrny J

Abstract

Three distinctly different mechanisms are shown to populate the K(pi)=6(+) (t(1/2)=77 ns), 16(+) (31 yr), and 8(-) (4 s) isomer bands of 178Hf by Coulomb excitation. High spin states of the three isomer bands were populated by Coulomb excitation of a hafnium target with a 650 MeV 136Xe beam. Although direct population of high-K bands is highly K-forbidden, isomer bands in 178Hf were populated up to spins 13(+)(K=6), 20(+)(K=16), and 14(-)(K=8) with in-band gamma yields of approximately 10(-4) of the ground state band. The data are consistent with a rapid increase in K mixing with increasing spin in the isomer bands.

Published
2002
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