Search

Your search keyword '"Gladnishki, K."' showing total 216 results
Start Over Author "Gladnishki, K."
216 results on '"Gladnishki, K."'

51. Lifetimes and electromagnetic transition strengths in Dy-157

Author

Gladnishki, K. A., Petkov, P., Moeller, O., Dewald, A., Jolie, J., Tonev, D., Trichkova, M., Heinze, S., von Brentano, P., Bazzacco, D., Ur, C. A., Farnea, E., Axiotis, M., Lunardi, S., de Angelis, G., Napoli, D. R., Marginean, N., Martinez, T., Caprio, M. A., Rainovski, G., Gladnishki, K. A., Petkov, P., Moeller, O., Dewald, A., Jolie, J., Tonev, D., Trichkova, M., Heinze, S., von Brentano, P., Bazzacco, D., Ur, C. A., Farnea, E., Axiotis, M., Lunardi, S., de Angelis, G., Napoli, D. R., Marginean, N., Martinez, T., Caprio, M. A., and Rainovski, G.

Abstract

Lifetimes of excited states of Dy-157 were measured by recoil distance Doppler-shift (RDDS) and Doppler-shift attenuation (DSAM) methods. The gamma-ray coincidence data were analyzed by the differential decay curve method. The level scheme and the newly deduced transition strengths were simultaneously described in the framework of the particle plus triaxial rotor model (PTRM) and the rigid-rotor model.

Published
2017

52. Low collectivity of the 2(1)(+) state of Po-212

Author

Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Blazhev, A., Altenkirch, R., Ansari, S., Astier, A., Bast, M., Beckers, M., Braunroth, Th., Cappellazzo, M., Dewald, A., Diel, F., Djongolov, M., Fransen, C., Gladnishki, K., Goldkuhle, A., Hennig, A., Karayonchev, V., Keatings, J. M., Kluge, E., Kroell, Th., Litzinger, J., Moschner, K., Mueller-Gatermann, C., Petkov, P., Scheck, M., Scholz, Ph., Schmidt, T., Spagnoletti, P., Stahl, C., Stegmann, R., Stolz, A., Vogt, A., Warr, N., Werner, V., Woelk, D., Zamora, J. C., Zell, K. O., Ponomarev, V. Yu., Van Isacker, P., Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Blazhev, A., Altenkirch, R., Ansari, S., Astier, A., Bast, M., Beckers, M., Braunroth, Th., Cappellazzo, M., Dewald, A., Diel, F., Djongolov, M., Fransen, C., Gladnishki, K., Goldkuhle, A., Hennig, A., Karayonchev, V., Keatings, J. M., Kluge, E., Kroell, Th., Litzinger, J., Moschner, K., Mueller-Gatermann, C., Petkov, P., Scheck, M., Scholz, Ph., Schmidt, T., Spagnoletti, P., Stahl, C., Stegmann, R., Stolz, A., Vogt, A., Warr, N., Werner, V., Woelk, D., Zamora, J. C., Zell, K. O., Ponomarev, V. Yu., and Van Isacker, P.

Abstract

The lifetime of the 2(1)(+) state of Po-212 was measured in the Pb-208(C-12, Be-8)Po-212 transfer reaction by gamma-ray spectroscopy employing the recoil distance Doppler shift (RDDS) method. The derived absolute B(E2) value of 2.6(3) W.u. indicates a low collectivity and contradicts previous claims of alpha-cluster components in the structure of the 2(1)(+) state. It is demonstrated that a consistent description of the properties of the 2(1)(+)-4(1)(+)-6(1)(+)-8(1)(+) sequence in Po-212 cannot be achieved in the framework of a single-j shell-model calculation, either. This puzzle is traced to the properties of the seniority-2 configurations in Pb-210 and Po-210.

Published
2017

53. A revised B(E2; 2(1)(+) -> 0(1)(+)) value in the semi-magic nucleus Po-210

Author

Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Blazhev, A., Astier, A., Altenkirch, R., Ansari, S., Braunroth, Th., Cortes, M. L., Dewald, A., Diel, F., Djongolov, M., Fransen, C., Gladnishki, K., Hennig, A., Karayonchev, V., Keatings, J. M., Kluge, E., Litzinger, J., Mueller-Gatermann, C., Petkov, P., Rudigier, M., Scheck, M., Scholz, Ph., Spagnoletti, P., Spieker, M., Stahl, C., Stegmann, R., Stoyanova, M., Thoele, P., Warr, N., Werner, V., Witt, W., Woelk, D., Zell, K. O., Van Isacker, P., Ponomarev, V. Yu., Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Blazhev, A., Astier, A., Altenkirch, R., Ansari, S., Braunroth, Th., Cortes, M. L., Dewald, A., Diel, F., Djongolov, M., Fransen, C., Gladnishki, K., Hennig, A., Karayonchev, V., Keatings, J. M., Kluge, E., Litzinger, J., Mueller-Gatermann, C., Petkov, P., Rudigier, M., Scheck, M., Scholz, Ph., Spagnoletti, P., Spieker, M., Stahl, C., Stegmann, R., Stoyanova, M., Thoele, P., Warr, N., Werner, V., Witt, W., Woelk, D., Zell, K. O., Van Isacker, P., and Ponomarev, V. Yu.

Abstract

The lifetimes of the 2(1)(+), the 2(2)(+) and the 3-1 states of Po-210 have been measured in the Pb-208(C-12, Be-10)Po-210 transfer reaction by the Doppler-shift attenuation method. The result for the lifetime of the 2(1)(+) state is about three times shorter than the adopted value. However, the new value still does not allow for a consistent description of the properties of the yrast 2(1)(+), 4(1)(+), 6(1)(+), and 8(1)(+) states of Po-210 in the framework of nuclear shell models. Quasi-particle Phonon Model (QPM) calculations also cannot overcome this problem thus indicating the existence of a peculiarity which is neglected in both theoretical approaches.

Published
2017

54. Evolution of quadrupole collectivity in N=80 isotones toward the Z=64 subshell gap: The B(E2; 2(1)(+) -> 0(1)(+)) value of Sm-142

Author

Stegmann, R, Bauer, C, Rainovski, G, Pietralla, N, Stahl, C, Boenig, S, Ilieva, S, Blazhev, A, Damyanova, A, Danchev, M, Gladnishki, K, Jolie, J, Lutter, R, Pakarinen, J, Radeck, D, Rapisarda, E, Reiter, P, Scheck, M, Siebeck, B, Stora, T, Thoele, P, Thomas, T, Thurauf, M, Vermeulen, MJ, Voulot, D, Warr, N, Wenander, F, Werner, V, and De Witte, Hilde

Abstract

It was shown that the evolution of the B(E2; 2+1 → 0+1 ) values in N = 80 isotones from Te to Nd is affected by the underlying subshell structure. This manifests itself in the observation of the local suppression of the B(E2) value at Z = 58 with respect to the neighboring nuclei 136Ba and 140Nd. To investigate this shell sensitivity toward the Z = 64 subshell gap, the B(E2; 2+1 → 0+1 ) value of the unstable nucleus 142Sm was measured utilizing the projectile Coulomb excitation technique. The radioactive ion beam (RIB) experiment was performed at the REX-ISOLDE facility at CERN. The B(E2) value of 32 (4) W.u. reflects the impact of the π(1g7/2 2d5/2) subshell closure at Z = 64 with respect to a linear scaling of collectivity with valence proton number. ispartof: Physical Review C vol:91 issue:5 status: published

Published
2015

55. Evolution of quadrupole collectivity in N=80 isotones toward the Z=64 subshell gap: The $B(E2;2_{1}^{+} \rightarrow 0_{1}^{+})$ value of $^{142}$Sm

Author

Stegmann, R, Bauer, C, Rainovski, G, Pietralla, N, Stahl, C, Bönig, S, Ilieva, S, Blazhev, A, Damyanova, A, Danchev, M, Gladnishki, K, Jolie, J, Lutter, R, Pakarinen, J, Radeck, D, Rapisarda, E, Reiter, P, Scheck, M, Siebeck, B, Stora, T, Thöle, P, Thomas, T, Thürauf, M, Vermeulen, M J, Voulot, D, Warr, N, Wenander, F, Werner, V, and De Witte, H

Subjects
Nuclear Physics - Experiment
Abstract

It was shown that the evolution of the $B(E2;2_{1}^{+} \rightarrow 0_{1}^{+})$ values in $N$ = 80 isotones from Te to Nd is affected by the underlying subshell structure. This manifests itself in the observation of the local suppression of the $B(E2)$ value at $Z$ = 58 with respect to the neighboring nuclei $^{136}$Ba and $^{140}$Nd. To investigate this shell sensitivity toward the $Z$ = 64 subshell gap, the $B(E2;2_{1}^{+} \rightarrow 0_{1}^{+})$ value of the unstable nucleus $^{142}$Sm was measured utilizing the projectile Coulomb excitation technique. The radioactive ion beam (RIB) experiment was performed at the REX-ISOLDE facility at CERN. The $B(E2)$ value of 32(4) W.u. reflects the impact of the $\pi(1g_{7/2} 2d_{5/2})$ subshell closure at $Z$ = 64 with respect to a linear scaling of collectivity with valence proton number.

Published
2015

56. Evolution of quadrupole collectivity in N=80 isotones toward the Z=64 subshell gap: The B(E2;2+1→0+1) value of 142Sm

Author

Stegmann, R., Bauer, C., Rainovski, G., Pietralla, N., Stahl, C., Bönig, S., Ilieva, S., Blazhev, A., Damyanova, A., Danchev, M., Gladnishki, K., Jolie, J., Lutter, R., Pakarinen, Janne, Radeck, D., Rapisarda, E., Reiter, P., Scheck, M., Siebeck, B., Stora, T., Thöle, P., Thomas, T., Thürauf, M., Vermeulen, M. J., Voulot, D., Warr, N., Wenander, F., Werner, V., and De Witte, H.

Subjects
projectile Coulomb excitation, samarium
Abstract

It was shown that the evolution of the B(E2; 2+ 1 → 0+ 1 ) values in N = 80 isotones from Te to Nd is affected by the underlying subshell structure. This manifests itself in the observation of the local suppression of the B(E2) value at Z = 58 with respect to the neighboring nuclei 136Ba and 140Nd. To investigate this shell sensitivity toward the Z = 64 subshell gap, the B(E2; 2+ 1 → 0+ 1 ) value of the unstable nucleus 142Sm was measured utilizing the projectile Coulomb excitation technique. The radioactive ion beam (RIB) experiment was performed at the REX-ISOLDE facility at CERN. The B(E2) value of 32 (4) W.u. reflects the impact of the π(1g7/2 2d5/2) subshell closure at Z = 64 with respect to a linear scaling of collectivity with valence proton number. peerReviewed

Published
2015

57. Nuclear g-factor measurement with time-dependent recoil in vacuum in radioactive-beam geometry

Author

Kusoglu, A., Stuchbery, A., E. Georgiev, G., Goasduff, A., Atanasova, L., Balabanski, D., L. Bostan, M., Detistov, P., Gladnishki, K., Ljungvall, J., Matea, I., Radeck, D., Sotty, C., Stefan, I., Verney, D., Yordanov, T.D., CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire d'Orsay (IPNO), and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)

Subjects
[PHYS]Physics [physics], [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

International audience; A modi fied version of the time-differential recoil-in-vacuum (TDRIV) method, adapted for use with radioactive beams, was applied for the first time to perform a g-factor measurement on the first-excited state in Mg-24 (E-x = 1.369 MeV, tau = 1.97 ps). A high precision g-factor value was obtained using predominantly H-like ions. The results obtained demonstrate the versatility of the new approach and have the precision needed for stringent tests of shell model calculations.

Published
2014
Full Text
View/download PDF

58. Lifetime measurements in Ru100

Author

Konstantinopoulos, T., primary, Petkov, P., additional, Goasduff, A., additional, Arici, T., additional, Astier, A., additional, Atanasova, L., additional, Axiotis, M., additional, Bonatsos, D., additional, Detistov, P., additional, Dewald, A., additional, Eller, M. J., additional, Foteinou, V., additional, Gargano, A., additional, Georgiev, G., additional, Gladnishki, K., additional, Gottardo, A., additional, Harissopulos, S., additional, Hess, H., additional, Kaim, S., additional, Kocheva, D., additional, Kusoglu, A., additional, Lagoyannis, A., additional, Ljungvall, J., additional, Lutter, R., additional, Matea, I., additional, Melon, B., additional, Mertzimekis, T. J., additional, Nannini, A., additional, Petrache, C. M., additional, Petrovici, A., additional, Provatas, G., additional, Reiter, P., additional, Rocchini, M., additional, Roccia, S., additional, Seidlitz, M., additional, Siebeck, B., additional, Suzuki, D., additional, Warr, N., additional, De Witte, H., additional, and Zerrouki, T., additional

Published
2017
Full Text
View/download PDF

59. Low-lying isovector 2(+) valence-shell excitations of Po-212

Author

Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Stahl, C., Petkov, P., Blazhev, A., Hennig, A., Astier, A., Braunroth, Th, Cortes, M. L., Dewald, A., Djongolov, M., Fransen, C., Gladnishki, K., Karayonchev, V., Litzinger, J., Mueller-Gatermann, C., Scheck, M., Scholz, Ph., Stegmann, R., Thoele, P., Werner, V., Witt, W., Woelk, D., Van Isacker, P., Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Stahl, C., Petkov, P., Blazhev, A., Hennig, A., Astier, A., Braunroth, Th, Cortes, M. L., Dewald, A., Djongolov, M., Fransen, C., Gladnishki, K., Karayonchev, V., Litzinger, J., Mueller-Gatermann, C., Scheck, M., Scholz, Ph., Stegmann, R., Thoele, P., Werner, V., Witt, W., Woelk, D., and Van Isacker, P.

Abstract

We present the results from an experiment dedicated to search for quadrupole-collective isovector valence-shell excitations, states with so-called mixed proton-neutron symmetry (MSS), of Po-212. This nucleus was studied in an a-transfer reaction. The lifetimes of two short-lived excited states, candidates for the one-phonon MSS, were determined by utilizing the Doppler shift attenuation method. The experimental results are in qualitative agreement with a simple single-j shell model calculation, which, together with the observed lack of quadrupole collectivity, indicates that the isovector nature of low-lying states is a property of the leading single-particle valence shell configuration.

Published
2016

60. Search for mixed-symmetry states in212Po

Author

Kocheva, D., primary, Rainovski, G., additional, Jolie, J., additional, Pietralla, N., additional, Stahl, C., additional, Petkov, P., additional, Blazhev, A., additional, Hennig, A., additional, Astier, A., additional, Braunroth, Th., additional, Cortes, L., additional, Dewald, A., additional, Djongolov, M., additional, Fransen, C., additional, Gladnishki, K., additional, Karayonchev, V., additional, Litzinger, J., additional, Müller-Gatermann, C., additional, Scheck, M., additional, Scholz, Ph., additional, Schramm, C., additional, Tölle, P., additional, Werner, V., additional, Witt, W., additional, Wölk, D., additional, and Van Isacker, P., additional

Published
2016
Full Text
View/download PDF

61. Lifetimes and electromagnetic transition strength in157Dy

Author

Gladnishki, K A, primary, Petkov, P, additional, Dewald, A, additional, Jolie, J, additional, Möller, O, additional, Saha, B, additional, Fitzler, A, additional, Jessen, K, additional, Tonev, D, additional, Klug, T, additional, Heinze, S, additional, von Brentano, P, additional, Rainovski, G, additional, Trichkova, M, additional, Bazzacco, D, additional, Ur, C A, additional, Farnea, E, additional, Axiotis, M, additional, Lunardi, S, additional, de Angelis, G, additional, Napoli, D R, additional, Marginean, N, additional, Martinez, T, additional, and Caprio, M A, additional

Published
2016
Full Text
View/download PDF

63. Coulomb excitation of the 3- isomer in Cu-70

Author

Rapisarda, E, Stefanescu, I, Balabanski, D L, Bastin, B, Blazhev, A, Bree, N, Danchev, M, Bruyneel, B, Davinson, T, Delahaye, P, Diriken, J, Eberth, J, Georgiev, G, Fedorov, D, Fedosseev, V N, Fiori, E, Franchoo, S, Fransen, Ch, Geibel, K, Gladnishki, K, Hadynska, K, Hess, H, Heyde, K, Huyse, M, Ivanov, O, Iwanicki, J, Jolie, J, Kalkuehler, M, Kroll, Th, Krucken, R, Koster, U, Lo Bianco, G, Lozeva, R, Marsh, B A, Nardelli, S, Nowacki, F, Patronis, N, Reiter, P, Seidlitz, M, Sieja, K, Smirnova, N, Srebrny, J, Van de Walle, J, Van Duppen, P, Warr, N, Wenander, F, Wimmer, K, Wrzosek, K, Zemlyanoi, S, and Zielinska, M

Subjects
Nuclear Physics - Experiment
Published
2011

64. Coulomb excitation of the 3(-) isomer in (70)Cu

Author

Rapisarda, E., Stefanescu, I., L. Balabanski, D., Bastin, B., Blazhev, A., Bree, N., Danchev, M., Bruyneel, B., Davinson, T., Delahaye, P., Diriken, J., Eberth, J., Georgiev, G., Fedorov, D., N. Fedosseev, V., Fiori, E., Franchoo, S., Fransen, C., Geibel, K., Gladnishki, K., Hadynska, K., Hess, H., Heyde, K., Huyse, M., Ivanov, O., Iwanicki, J., Jolie, J., Kalkuehler, M., Kroll, T., Krucken, R., Koster, U., Lo Bianco, G., Lozeva, Radomira, A. Marsh, B., Nardelli, S., Nowacki, F., Patronis, N., Reiter, P., Seidlitz, M., Sieja, K., Smirnova, N., Srebrny, J., Van De Walle, J., Van Duppen, P., Warr, N., Wenander, F., Wimmer, K., Wrzosek, K., Zemlyanoi, S., Zielinska, M., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire d'Orsay (IPNO), Institut Pluridisciplinaire Hubert Curien (IPHC), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université de Strasbourg (UNISTRA)-Centre National de la Recherche Scientifique (CNRS), Physique théorique (THEORIE), Centre d'Etudes Nucléaires de Bordeaux Gradignan (CENBG), and Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Sciences et Technologies - Bordeaux 1-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
separation, detector, cu-66, SEPARATION, CU-66, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], DETECTOR
Abstract

Post-accelerated isomerically purified radioactive beams, available at the CERN On-Line Isotope Mass Separator facility using the resonant ionization laser technique, have been used to study the Coulomb excitation of the I(pi) = 3(-) state in (70)Cu (Z = 29, N = 41). While first results using a I(pi) = 6(-) beam were reported previously, the present complementary experiment allows us to complete the study of the multiplet of states (3(-), 4(-), 5(-), 6(-)) arising from the pi 2p(3)/(2)nu 1g(9/2) configuration. Besides the known gamma-ray transition deexciting the 4(-) state, a ground-state. ray of 511(3) keV was observed for the first time and was unambiguously associated with the 5(-) state deexcitation. This observation fixes the energy, spin, and parity of this state, completing the low-energy level scheme of (70)Cu. B(E2) values for all possible E2 transitions within the multiplet were determined. A comparison with large-scale shell model calculations using different interactions and valence spaces shows the importance of proton excitation across the Z = 28 shell gap and the role of the 2d(5/2) neutron orbital. Physical Review C

Published
2011
Full Text
View/download PDF

65. Low-lying isovector2+valence-shell excitations ofPo212

Author

Kocheva, D., primary, Rainovski, G., additional, Jolie, J., additional, Pietralla, N., additional, Stahl, C., additional, Petkov, P., additional, Blazhev, A., additional, Hennig, A., additional, Astier, A., additional, Braunroth, Th., additional, Cortés, M. L., additional, Dewald, A., additional, Djongolov, M., additional, Fransen, C., additional, Gladnishki, K., additional, Karayonchev, V., additional, Litzinger, J., additional, Müller-Gatermann, C., additional, Scheck, M., additional, Scholz, Ph., additional, Stegmann, R., additional, Thöle, P., additional, Werner, V., additional, Witt, W., additional, Wölk, D., additional, and Van Isacker, P., additional

Published
2016
Full Text
View/download PDF

66. Magnetism of an Excited Self-Conjugate Nucleus: Precise Measurement of the g Factor of the 2(1)(+) State in Mg-24

Author

Kusoglu, A., Stuchbery, A. E., Georgiev, G., Brown, B. A., Goasduff, A., Atanasova, L., Balabanski, D. L., Bostan, M., Danchev, M., Detistov, P., Gladnishki, K. A., Ljungvall, J., Matea, I., Radeck, D., Sotty, C., Stefan, I., Verney, D., Yordanov, D. T., Kusoglu, A., Stuchbery, A. E., Georgiev, G., Brown, B. A., Goasduff, A., Atanasova, L., Balabanski, D. L., Bostan, M., Danchev, M., Detistov, P., Gladnishki, K. A., Ljungvall, J., Matea, I., Radeck, D., Sotty, C., Stefan, I., Verney, D., and Yordanov, D. T.

Abstract

A precise measurement of the g factor of the first-excited state in the self-conjugate (N = Z) nucleus Mg-24 is performed by a new time-differential recoil-in-vacuum method based on the hyperfine field of hydrogenlike ions. Theory predicts that the g factors of such states, in which protons and neutrons occupy the same orbits, should depart from 0.5 by a few percent due to configuration mixing and meson-exchange effects. The experimental result, g = 0.538 +/- 0.013, is in excellent agreement with recent shell-model calculations and shows a departure from 0.5 by almost 3 standard deviations, thus achieving, for the first time, the precision and accuracy needed to test theory. Proof of the new method opens the way for wide applications including measurements of the magnetism of excited states of exotic nuclei produced as radioactive beams.

Published
2015

67. Magnetism of an excited self-conjugate nucleus: precise measurement of the g Factor of the 21+State in Mg 24

Author

Kusoglu, A., Stuchbery, A. E., Georgiev, G., Brown, B. A., Goasduff, A., Atanasova, L., Balabanski, D. L., Bostan, M., Danchev, M., Detistov, P., Gladnishki, K. A., Ljungvall, J., Matea, I., Radeck, D., Sotty, C., Stefan, I., Verney, D., Yordanov, D. T., Kusoglu, A., Stuchbery, A. E., Georgiev, G., Brown, B. A., Goasduff, A., Atanasova, L., Balabanski, D. L., Bostan, M., Danchev, M., Detistov, P., Gladnishki, K. A., Ljungvall, J., Matea, I., Radeck, D., Sotty, C., Stefan, I., Verney, D., and Yordanov, D. T.

Abstract

A precise measurement of the g factor of the first-excited state in the self-conjugate (N=Z) nucleus Mg24 is performed by a new time-differential recoil-in-vacuum method based on the hyperfine field of hydrogenlike ions. Theory predicts that the g factors of such states, in which protons and neutrons occupy the same orbits, should depart from 0.5 by a few percent due to configuration mixing and meson-exchange effects. The experimental result, g=0.538±0.013, is in excellent agreement with recent shell-model calculations and shows a departure from 0.5 by almost 3 standard deviations, thus achieving, for the first time, the precision and accuracy needed to test theory. Proof of the new method opens the way for wide applications including measurements of the magnetism of excited states of exotic nuclei produced as radioactive beams.

Published
2015

68. Coulomb excitation of Ga-73

Author

Diriken, J., Stefanescu, I., Balabanski, D., Blasi, N., Blazhev, A., Bree, N., Cederkaell, J., Cocolios, T. E., Davinson, T., Eberth, J., Ekstrom, A., Fedorov, D. V., Fedosseev, V. N., Fraile, L. M., Franchoo, S., Georgiev, G., Gladnishki, K., Huyse, M., Ivanov, O. V., Ivanov, V. S., Iwanicki, J., Jolie, J., Konstantinopoulos, T., Kroell, Th., Kruecken, R., Koester, U., Lagoyannis, A., Lo Bianco, G., Maierbeck, P., Marsh, B. A., Napiorkowski, P., Patronis, N., Pauwels, D., Reiter, P., Seliverstov, M., Sletten, G., Van de Walle, J., Van Duppen, P., Voulot, D., Walters, W. B., Warr, N., Wenander, F., Wrzosek, K., and Research unit Nuclear & Hadron Physics

Subjects
GA-69, GA ISOTOPES, DECAY
Abstract

The B(E2; I-i -> I-f) values for transitions in Ga-71(31)40 and Ga-73(31)42 were deduced from a Coulomb excitation experiment at the safe energy of 2.95 MeV/nucleon using post-accelerated beams of Ga-71,Ga-73 at the REX-ISOLDE on-line isotope mass separator facility. The emitted gamma rays were detected by the MINIBALL gamma-detector array, and B(E2; I-i -> I-f) values were obtained from the yields normalized to the known strength of the 2(+) -> 0(+) transition in the Sn-120 target. The comparison of these new results with the data of less neutron-rich gallium isotopes shows a shift of the E2 collectivity toward lower excitation energy when adding neutrons beyond N = 40. This supports conclusions from previous studies of the gallium isotopes, which indicated a structural change in this isotopic chain between N = 40 and 42. Combined with recent measurements from collinear laser spectroscopy showing a 1/2(-) spin and parity for the ground state, the extracted results revealed evidence for a 1/2(-), 3/2(-) doublet near the ground state in Ga-73(31)42 differing by at most 0.8 keV in energy.

Published
2010

69. Evolution of the proton-neutron interaction towards $^{78}$Ni: Vibrational structure of $^{72, 74}$Zn

Author

Mücher, D, Krücken, R, Wimmer, K, Bildstein, V, Albers, M, Bettermann, L, Blazhev, A, Bönig, S, Eberth, J, Fransen, C, Gernhäuser, R, Gladnishki, K, Das Gupta, S, Hadynska, K, Hass, M, Iwanicki, J, Jolie, J, Jungclaus, A, Kumar, V, Kröll, T, Leske, J, Lo Bianco, G, Napiorkowski, P, Nara Singh, B S, Nowack, K, Orlandi, R, Pakarinen, J, Pietralla, N, Rainovski, G, Scheck, M, Singh, K, Srebrny, J, von Schmid, M, Wrzosek-Lipska, K, Warr, N, and Zielinska, M

Subjects
Detectors and Experimental Techniques
Published
2010

71. Evolution of quadrupole collectivity inN=80isotones toward theZ=64subshell gap: TheB(E2;21+→01+)value ofSm142

Author

Stegmann, R., primary, Bauer, C., additional, Rainovski, G., additional, Pietralla, N., additional, Stahl, C., additional, Bönig, S., additional, Ilieva, S., additional, Blazhev, A., additional, Damyanova, A., additional, Danchev, M., additional, Gladnishki, K., additional, Jolie, J., additional, Lutter, R., additional, Pakarinen, J., additional, Radeck, D., additional, Rapisarda, E., additional, Reiter, P., additional, Scheck, M., additional, Siebeck, B., additional, Stora, T., additional, Thöle, P., additional, Thomas, T., additional, Thürauf, M., additional, Vermeulen, M. J., additional, Voulot, D., additional, Warr, N., additional, Wenander, F., additional, Werner, V., additional, and De Witte, H., additional

Published
2015
Full Text
View/download PDF

72. Nuclear g-factor measurement with time-dependent recoil in vacuum in radioactive-beam geometry

Author

Kusoglu, A, primary, Stuchbery, A E, additional, Georgiev, G, additional, Goasduff, A, additional, Atanasova, L, additional, Balabanski, D L, additional, Bostan, M, additional, Danchev, M, additional, Detistov, P, additional, Gladnishki, K, additional, Ljungvall, J, additional, Matea, I, additional, Radeck, D, additional, Sotty, C, additional, Stefan, I, additional, Verney, D, additional, and Yordanov, D T, additional

Published
2015
Full Text
View/download PDF

73. Magnetism of an Excited Self-Conjugate Nucleus: Precise Measurement of thegFactor of the21+State inMg24

Author

Kusoglu, A., primary, Stuchbery, A. E., additional, Georgiev, G., additional, Brown, B. A., additional, Goasduff, A., additional, Atanasova, L., additional, Balabanski, D. L., additional, Bostan, M., additional, Danchev, M., additional, Detistov, P., additional, Gladnishki, K. A., additional, Ljungvall, J., additional, Matea, I., additional, Radeck, D., additional, Sotty, C., additional, Stefan, I., additional, Verney, D., additional, and Yordanov, D. T., additional

Published
2015
Full Text
View/download PDF

75. g-factor measurements at RISING: The cases of 127Sn and 128Sn

Author

Atanasova, L., Balabanski, D. L., Chamoli, S. K., Hass, M., Simpson, G., Bazzacco, D., Becker, F., Bednarczyk, P., Benzoni, G., Blasi, N., Blazhev, A., Bracco, A., Brandau, C., Caceres, L., Camera, F., Crespi, F. C. L., Detistov, P., Doornenbal, P., Fahlander, C., Farnea, E., Georgiev, G., Gerl, J., Gladnishki, K. A., Gorska, M., Grebosz, J., Hoischen, R., Ilie, G., Ionescu-Bujor, M., Iordachescu, A., Jungclaus, A., Lo Bianco, G., Kmiecik, M., Kojouharov, I., Kurz, N., Lakshmi, S., Lozeva, R., Maj, A., Montanari, D., Neyens, G., Pfutzner, M., Pietri, S., Podolyak, Z., Prokopowicz, W., Rudolph, D., Rusev, G., Saito, T. R., Saltarelli, A., Schaffner, H., Schwengner, R., Tashenov, S., Valiente-Dobon, J. J., Vermeulen, N., Walker, J., Werner-Malento, E., Wieland, O., Wollersheim, H. J., Grawe, H., Hjorth-Jensen, M., Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), and RISING

Subjects
nuclear spectroscopy, time-differential perturbed angular distribution, shell model, g-factors, Nuclear structure, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex]
Abstract

We report g-factor measurements for the 19/2+ T1/2 = 4.5(3) µs isomer in 127 Sn and the 10+ T1/2 = 2.69(23) µs isomer in 128 Sn. The experiment was carried out on isomers which were produced and spin-aligned in relativistic heavy-ion fragmentation at GSI and were selected and separated by the GSI fragment separator (FRS). The gamma-rays of the isomer decay were detected by the RISING array. The method of time-differential perturbed angular distribution was utilized. The measured g factors, g(19/2+ ;127 Sn) = -0.17(2) and g(10+ ;128 Sn) = -0.20(4), are compared with shell model calculations. The results demonstrate the feasibility of the method for similar measurements in exotic neutron-rich nuclei.

Published
2010
Full Text
View/download PDF

77. Coulomb excitation of $^{72}$Zn: vibrational proton-neutron structure of the even-A Z=30 isotopic chain

Author

Mücher, D, Albers, M, Bernards, C, Bettermann, L, Blazhev, A, Eberth, J, Fransen, C, Gladnishki, K, Das-Gupta, S, Hadynska, K, Hass, M, Iwanicki, J, Jolie, J, Jungclaus, A, Kumar, V, Leske, J, Lo Bianco, G, Napiorkowski, P, Nara-Singh, B S, Orlandi, R, Pietralla, N, Radeck, D, Rainovski, G, Singh, K, Speidel, K H, Srebrny, J, Vande Walle, J, Wrzosek-Lipska, K, Warr, N, and Zielinska, M

Subjects
Detectors and Experimental Techniques
Published
2009

78. Coulomb excitation of 68/28Ni40 at 'safe' energies

Author

Bree, Nick, Stefanescu, Irina, Butler, Peter A, Cederkall, Joakim, Davinson, T, Delahaye, Pierre, Eberth, J, Fedorov, Dima, Fedosseev, Valentin N, Fraile, Luis Mario, Franchoo, Serge, Georgiev, Georgi, Gladnishki, K, Huyse, Marc, Ivanov, Oleg, Koster, Ulli, Kroll, Thorsten, Krucken, Reiner, Marsh, Bruce A, Niedermaier, Oliver, Reiter, Pieter, Scheit, Heiko, Schwalm, D, Sieber, T, Van de Walle, Jarno, Van Duppen, Piet, Warr, N, Weisshaar, D, Wenander, Frederik, and Zemlyanoy, Sergei

Subjects
Nuclear Experiment
Abstract

The B(E2; 0+ → 2+) value in 68Ni has been measured using Coulomb excitation at safe energies. The 68Ni radioactive beam was post-accelerated at the CERN on-line isotope mass separator (ISOLDE) facility to 2.9 MeV/u and directed to a 108Pd target. The emitted γ rays were detected by the MINIBALL detector array. Not only directly registered but also indirectly deduced information on the nucleus emitting the γ ray was used to perform the Doppler correction, leading to a larger center-of-mass angular range to infer the excitation cross section. The obtained value of 2.8(+1.2/−1.0) 10^2 e^2 fm^4 is in good agreement with the value measured at intermediate energy Coulomb excitation, confirming the low 0+ → 2+ transition probability. 4 pages, 5 figures ispartof: Physical Review C, Nuclear physics vol:78 issue:4 pages:1-4 status: published

Published
2008

79. Coulomb excitation of $^{68}_{28}Ni_{40}$ at safe energies

Author

Bree, N, Stefanescu, I, Butler, P A, Cederkäll, J, Davinson, T, Delahaye, P, Eberth, J, Fedorov, D, Fedosseev, V, Fraile, L M, Franchoo, S, Georgiev, G, Gladnishki, K, Huyse, M, Ivanov, O, Iwanicki, J, Jolie, J, Köster, U, Kröll, T, Krücken, R, Marsh, B A, Niedermaier, O, Reiter, P, Scheit, H, Schwalm, D, Sieber, T, Vande Walle, J, Van Duppen, P, Warr, N, Weisshaar, D, Wenander, F, Zemlyanoy, S, Instituutvoor Kern-en Stralingsfysica, and Leuven, K U

Subjects
Physics::Accelerator Physics, Nuclear Physics - Experiment, Nuclear Experiment
Abstract

The $B(E2;0^+\to2^+)$ value in $^{68}$Ni has been measured using Coulomb excitation at safe energies. The $^{68}$Ni radioactive beam was post-accelerated at the ISOLDE facility (CERN) to 2.9 MeV/u. The emitted $\gamma$ rays were detected by the MINIBALL detector array. A kinematic particle reconstruction was performed in order to increase the measured c.m. angular range of the excitation cross section. The obtained value of 2.8$\pm$1.0 10$^2$ e$^2$fm$^4$ is in good agreement with the value measured at intermediate energy Coulomb excitation, confirming the low transition probability.

Published
2008

80. Interplay between Single-Particle and Collective Effects in the Odd-A Cu Isotopes beyond N=40

Author

Stefanescu, I., Georgiev, G., Balabanski, D. L., Blasi, N., Blazhev, A., Bree, N., Cederk?ll, J., Cocolios, T. E., Davinson, T., Diriken, J., Eberth, J., Ekstr?m, A., Fedorov, D., Fedosseev, V. N., Fraile, L. M., Franchoo, S., Gladnishki, K., Huyse, M., Ivanov, O., Ivanov, V., Iwanicki, J., Jolie, J., Konstantinopoulos, T., Kr?ll, Th, Kr?cken, R., K?ster, U., Lagoyannis, A., Lo Bianco, G., Maierbeck, P., Marsh, B. A., Napiorkowski, P., Patronis, N., Pauwels, D., Rainovski, G., Reiter, P., Riisager, K., Seliverstov, M., Sletten, G., Van de Walle, J., Van Duppen, P., Voulot, D., Warr, N., Wenander, F., Wrzosek, K., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut de Physique Nucléaire d'Orsay (IPNO), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear Physics - Experiment, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 25.70.De, 21.10.Ky, 21.60.Cs, 27.50.+e
Abstract

Collective properties of the low-lying levels in the odd-A 67-73Cu were investigated by Coulomb excitation with radioactive beams. The beams were produced at ISOLDE and postaccelerated by REX-ISOLDE up to 2.99 MeV/u. In 67,69Cu, low-lying 1/2(-), 5/2(-), and 7/2(-) states were populated. In 71,73Cu, besides the known transitions deexciting the single-particle-like 5/2(-) and core-coupled 7/2(-) levels, gamma rays of 454 and 135 keV, respectively, were observed for the first time. Based on a reanalysis of beta-decay work and comparison with the systematics, a spin 1/2(-) is suggested for these excited states. Three B(E2) values were determined in each of the four isotopes. The results indicate a significant change in the structure of the odd-A Cu isotopes beyond N=40 where single-particle-like and collective levels are suggested to coexist at very low excitation energies.

Published
2008
Full Text
View/download PDF

81. New sub-\mu s isomers in 125,127,129Sn and isomer systematics of 124-130 Sn

Author

Lozeva, R. L., Simpson, G. S., Grawe, H., Neyens, G., Atanasova, L. A., Balabanski, D. L., Bazzacco, D., Becker, F., Bednarczyk, P., Benzoni, G., Blasi, N., Blazhev, A., Bracco, A., Brandau, C., Caceres, L., Camera, F., Chamoli, S. K., Crespi, F. C. L., Daugas, J.-M., Detistov, P., Rydt, M., Doornenbal, P., Fahlander, C., Farnea, E., Georgiev, G., Gerl, J., Gladnishki, K. A., Gorska, M., Grebosz, J., Hass, M., Hoischen, R., Ilie, G., Ionescu-Bujor, M., Iordachescu, A., Jolie, J., Jungclaus, A., Kmiecik, M., Kojouharov, I., Kurz, N., Lakshmi, S. P., Lo Bianco, G., Mallion, S., Maj, A., Montanari, D., Perru, O., Pfützner, M., Pietri, S., Pinston, J. A., Podolyak, Z., Prokopowicz, W., Rudolph, D., Rusev, G., Saitoh, T. R., Saltarelli, A., Schaffner, H., Schwengner, R., Tashenov, S., Turzo, K., Valiente-Dobon, J. J., Vermeulen, N., Walker, J., Werner-Malento, E., Wieland, O., and Wollersheim, H.-J.

Subjects
shell model, isomers, Nuclear structure, radioactive ion beams
Abstract

New sub-\mu s isomers have been observed in the neutron-rich Sn isotopes. 125,127,129Sn nuclei have been produced in a relativistic fission reaction of 238U on a 9Be target at 750 A MeV and by the fragmentation of 136Xe at 600 A MeV populating high-spin yrast states. In addition to the already known \mu s isomers, three new ones -1 with sub-\mu s half-lives have been observed. These yrast isomers are the high-spin members of the \nu (d_3/2^-1 h_11/2^-2 ) and \nu h_11/2 ^-n, seniority v = 3 multiplets leading to isomeric (23/2+) and (27/2-) states, respectively. Added to the already known 19/2+ \mu s isomers in this region the current work completes the systematic information of neutron-hole excitations toward the filling of the last h_11/2 orbital a t N = 82. The results are discussed in the framework of state-of-the -art shell-model calculations using realistic interactions.

Published
2008

82. New sub-mus isomers in 125,127,129Sn and isomer systematics of 124-130Sn

Author

Lozeva, Radomira, Simpson, G.S., Grawe, H., Neyens, G., Atanasova, L.A., L. Balabanski, D., Bazzacco, D., Becker, F., Bednarczyk, P., Benzoni, G., Blasi, N., Blazhev, A., Bracco, A., Brandau, C., Caceres, L., Camera, F., K. Chamoli, S., C. L. Crespi, F., Daugas, J.-M., Detistov, P., De Rydt, M., Doornenbal, P., Fahlander, C., Farnea, E., Georgiev, G., Gerl, J., A. Gladnishki, K., Gorska, M., Grebosz, J., Hass, M., Hoischen, R., Ilie, G., Ionescu-Bujor, M., Iordachescu, A., Jolie, J., Jungclaus, A., Kmiecik, M., Kojouharov, I., Kurz, N., P. Lakshmi, S., Lo Bianco, G., Mallion, S., Maj, A., Montanari, D., Perru, O., Pfutzner, M., Piétri, S., Pinston, J.A., Podolyak, Zs., Prokopowicz, W., Rudolph, D., Rusev, G., R. Saitoh, T., Saltarelli, A., Schaffner, H., Schwengner, R., Tashenov, S., Turzo, K., Valiente-Dobon, J.J., Vermeulen, N., Walker, J., Werner-Malento, E., Wieland, O., Wollersheim, H.-J., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), Département de Physique Théorique et Appliquée (DPTA), DAM Île-de-France (DAM/DIF), Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction des Applications Militaires (DAM), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), and ILL

Subjects
[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], 21.10.Tg, 21.60.Cs, 23.20.Lv, 27.60.+j
Abstract

Newsub-μs isomers have been observed in the neutron-rich Sn isotopes. 125,127,129Sn nuclei have been produced in a relativistic fission reaction of 238U on a 9Be target at 750 A·MeV and by the fragmentation of 136Xe at 600 A·MeV populating high-spin yrast states. In addition to the already known μs isomers, three new ones with sub-μs half-lives have been observed. These yrast isomers are the high-spin members of the ν(d−1 3/2h−2 11/2) and νh−n 11/2, seniority v = 3 multiplets leading to isomeric (23/2+) and (27/2−) states, respectively. Added to the already known 19/2+μs isomers in this region the current work completes the systematic information of neutron-hole excitations toward the filling of the last h11/2 orbital at N = 82. The results are discussed in the framework of state-of-the-art shell-model calculations using realistic interactions.

Published
2008
Full Text
View/download PDF

83. g-factor measurements at RISING: the case of 127Sn

Author

Atanasova, L., Balabanski, D. L., Hass, M., Bazzacco, D., Becker, F., Bednarczyk, P., Benzoni, G., Blasi, N., Blazhev, A., Bracco, A., Brandau, C., Caceres, L., Camera, F., Chamoli, S. K., Crespi, F. C. L., Detistov, P., Doornenbal, P., Fahlander, C., Farnea, E., Georgiev, G., Gerl, J., Gladnishki, K., Gorska, M., Grawe, H., Grebosz, J., Hoischen, R., Ilie, G., Ionescu-Bujor, M., Iordachescu, A., Jungclaus, A., Lo Bianco, G., Kmiecik, M., Kojouharov, I., Kurz, N., Lakshmi, S., Lozeva, R., Maj, A., Montanari, D., Neyens, G., Pfützner, M., Pietri, S., Podolyak, Z., Prokopowicz, W., Rudolph, D., Rusev, G., Saito, T. R., Saltarelli, A., Schaffner, H., Schwengner, R., Simpson, G., Tashenov, S., Valiente-Dobon, J. J., Vermeulen, N., Walker, J., Werner-Malento, E., Wieland, O., and Wollersheim, H. J.

Published
2006

84. A revised B(E2;2 $ \rightarrow$ 0 ) value in the semi-magic nucleus Po.

Author

Kocheva, D., Rainovski, G., Jolie, J., Pietralla, N., Blazhev, A., Astier, A., Altenkirch, R., Ansari, S., Braunroth, Th., Cortés, M., Dewald, A., Diel, F., Djongolov, M., Fransen, C., Gladnishki, K., Hennig, A., Karayonchev, V., Keatings, J., Kluge, E., and Litzinger, J.

Subjects
ELECTRON-nucleus scattering, CHARGE transfer, DOPPLER effect, PHONONS, QUASIPARTICLES
Abstract

The lifetimes of the $ 2^+_1$ , the $ 2^+_2$ and the $ 3^-_1$ states of Po have been measured in the Pb(C,Be)Po transfer reaction by the Doppler-shift attenuation method. The result for the lifetime of the $ 2^+_1$ state is about three times shorter than the adopted value. However, the new value still does not allow for a consistent description of the properties of the yrast $ 2^+_1$ , $ 4^+_1$ , $ 6^+_1$ , and $ 8^+_1$ states of Po in the framework of nuclear shell models. Quasi-particle Phonon Model (QPM) calculations also cannot overcome this problem thus indicating the existence of a peculiarity which is neglected in both theoretical approaches. [ABSTRACT FROM AUTHOR]

Published
2017
Full Text
View/download PDF

85. Angular Momentum Population in the Projectile Fragmentation of U-238 at 750 MeV/nucleon

Author

Gladnishki, K A, Podolyak, Z, Regan, P H, Gerl, J, Hellstrom, M, Kopatch, Y, Mandal, S, Gorska, M, Page, R D, Wollersheim, H J, Banu, A, Benzoni, G, Boardman, H, La Commara, M, Ekman, J, Fahlander, C, Geissel, H, Grawe, H, Kaza, E, Korgul, A, Matos, M, Mineva, M N, Pearson, C J, Plettner, C, Rudolph, D, Scheidenberger, C, Schmidt, K H, Shishkin, V, Sohler, D, Summerer, K, Valiente-Dobon, J J, Walker, P M, Weick, H, Winkler, M, and Yordanov, O

Subjects
Nuclear Theory, Physics::Atomic and Molecular Clusters, Nuclear Experiment
Abstract

A systematic study of the population probabilities of nanosecond and microsecond isomers produced following the projectile fragmentation of U-238 at 750 MeV/nucleon has been undertaken at the SIS/FRS facility at GSI. Approximately 15 isomeric states in neutron-deficient nuclei around A similar to 190 were identified and the corresponding. isomeric ratios determined. The results are compared with a model based on the statistical abrasion-ablation description of relativistic fragmentation and simple assumptions concerning gamma cascades in the final nucleus (sharp cutoff). This model represents an upper limit for the population of isomeric states in relativistic projectile fragmentation. When the decay properties of the states above the isomer are taken into account, as opposed to the sharp cutoff approximation, a good agreement between the experimental and calculated angular momentum population is obtained.

Published
2004

86. Evolution of Collectivity in the N = 80 Isotones

Author

Bauer, C., primary, Stegmann, R., additional, Rainovski, G., additional, Pietralla, N., additional, Blazhev, A., additional, Bönig, S., additional, Damyanova, A., additional, Danchev, M., additional, Gladnishki, K. A., additional, Lutter, R., additional, Marsh, B. A., additional, Möller, T., additional, Pakarinen, J., additional, Radeck, D., additional, Rapisarda, E., additional, Reiter, P., additional, Scheck, M., additional, Seidlitz, M., additional, Siebeck, B., additional, Stahl, C., additional, Thoele, P., additional, Thomas, T., additional, Thürauf, M., additional, Warr, N., additional, Werner, V., additional, and de Witte, H., additional

Published
2014
Full Text
View/download PDF

88. Search formixed-symmetry states of nuclei in the vicinity of the double-magic nucleus 208Pb.

Author

Kocheva, D., Stegmann, R., Rainovski, G., Jolie, J., Pietralla, N., Stahl, C., Petkov, P., Blazhev, A., Hennig, A., Bauer, C., Braunroth, Th., Carpenter, M. P., Cortes, L., Dewald, A., Djongolov, M., Fransen, C., Gladnishki, K., Janssens, R. V. F., Karayonchev, V., and Lettmann, M.

Subjects
QUADRUPOLES, ELECTROMAGNETIC theory, QUADRUPOLE moments, NEUTRON-proton interactions, NUCLEAR reactions, PARTICLE interactions
Abstract

In this work we present the results from two experiments dedicated to search for quadrupolecollective isovector valence-shell excitation, the states with so-called mixed proton-neutron symmetry (MSS), in nuclei around the doubly magic nucleus 208Pb. 212Po was studied in an α-transfer reaction. 204Hg was studied in an inverse kinematics Coulomb excitation reaction on a carbon target. Both experiments provide indications for existence of one-phonon MSSs. Those are the first experimentally identified MSSs in the mass A ≈ 208 region. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

89. Coulomb excitation of the 3(-) isomer in Cu-70

Author

Rapisarda, E., Stefanescu, I., Balabanski, D. L., Bastin, B., Blazhev, A., Bree, N., Danchev, M., Bruyneel, B., Davinson, T., Delahaye, P., Diriken, J., Eberth, J., Georgiev, G., Fedorov, D., Fedosseev, V. N., Fiori, E., Franchoo, S., Fransen, Ch, Geibel, K., Gladnishki, K., Hadynska, K., Hess, H., Heyde, K., Huyse, M., Ivanov, O., Iwanicki, J., Jolie, J., Kalkuehler, M., Kroell, Th, Kruecken, R., Koester, U., Lo Bianco, G., Lozeva, R., Marsh, B. A., Nardelli, S., Nowacki, F., Patronis, N., Reiter, P., Seidlitz, M., Sieja, K., Smirnova, N., Srebrny, J., Van de Walle, J., Van Duppen, P., Warr, N., Wenander, F., Wimmer, K., Wrzosek, K., Zemlyanoi, S., Zielinska, M., Rapisarda, E., Stefanescu, I., Balabanski, D. L., Bastin, B., Blazhev, A., Bree, N., Danchev, M., Bruyneel, B., Davinson, T., Delahaye, P., Diriken, J., Eberth, J., Georgiev, G., Fedorov, D., Fedosseev, V. N., Fiori, E., Franchoo, S., Fransen, Ch, Geibel, K., Gladnishki, K., Hadynska, K., Hess, H., Heyde, K., Huyse, M., Ivanov, O., Iwanicki, J., Jolie, J., Kalkuehler, M., Kroell, Th, Kruecken, R., Koester, U., Lo Bianco, G., Lozeva, R., Marsh, B. A., Nardelli, S., Nowacki, F., Patronis, N., Reiter, P., Seidlitz, M., Sieja, K., Smirnova, N., Srebrny, J., Van de Walle, J., Van Duppen, P., Warr, N., Wenander, F., Wimmer, K., Wrzosek, K., Zemlyanoi, S., and Zielinska, M.

Abstract

Post-accelerated isomerically purified radioactive beams, available at the CERN On-Line Isotope Mass Separator facility using the resonant ionization laser technique, have been used to study the Coulomb excitation of the I-pi = 3(-) state in Cu-70 (Z = 29, N = 41). While first results using a I-pi = 6(-) beam were reported previously, the present complementary experiment allows us to complete the study of the multiplet of states (3(-), 4(-), 5(-), 6(-)) arising from the pi 2p(3)/(2)nu 1g(9/2) configuration. Besides the known gamma-ray transition deexciting the 4(-) state, a ground-state. ray of 511(3) keV was observed for the first time and was unambiguously associated with the 5(-) state deexcitation. This observation fixes the energy, spin, and parity of this state, completing the low-energy level scheme of Cu-70. B(E2) values for all possible E2 transitions within the multiplet were determined. A comparison with large-scale shell model calculations using different interactions and valence spaces shows the importance of proton excitation across the Z = 28 shell gap and the role of the 2d(5/2) neutron orbital.

Published
2011

90. Spin-alignment and g-factor measurement of the I-pi=12(+) isomer in Pb-192 produced in the relativistic-energy fragmentation of a U-238 beam

Author

Kmiecik, M, Maj, A, Gerl, J, Neyens, G, Atanasova, L, Balabanski, DL, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Bracco, A, Brambilla, S, Caceres, L, Camera, F, Ciemala, M, Crespi, FCL, Chamoli, SK, Chmel, S, Daugas, JM, Detistov, P, Doornenbal, P, Georgiev, G, Gladnishki, K, Gorska, M, Grawe, H, Grebosz, J, Hass, M, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Jolie, J, Kojuharov, I, Krasznahorkay, A, Kulessa, R, Lach, M, Lakshmi, S, Leoni, S, Lo Bianco, G, Lozeva, R, Maier, KH, Mallion, S, Mazurek, K, Meczynski, W, Million, B, Montanari, D, Myalski, S, Petrache, C, Pfuetzner, M, Pietri, S, Podolyak, Z, Prokopowicz, W, Rudolph, D, Saito, N, Saito, TR, Saltarelli, A, Simpson, GS, Styczen, J, Vermeulen, N, Werner-Malento, E, Wieland, O, Wollersheim, HJ, Zieblinski, M, Kmiecik, M, Maj, A, Gerl, J, Neyens, G, Atanasova, L, Balabanski, DL, Becker, F, Bednarczyk, P, Benzoni, G, Blasi, N, Bracco, A, Brambilla, S, Caceres, L, Camera, F, Ciemala, M, Crespi, FCL, Chamoli, SK, Chmel, S, Daugas, JM, Detistov, P, Doornenbal, P, Georgiev, G, Gladnishki, K, Gorska, M, Grawe, H, Grebosz, J, Hass, M, Hoischen, R, Ilie, G, Ionescu-Bujor, M, Jolie, J, Kojuharov, I, Krasznahorkay, A, Kulessa, R, Lach, M, Lakshmi, S, Leoni, S, Lo Bianco, G, Lozeva, R, Maier, KH, Mallion, S, Mazurek, K, Meczynski, W, Million, B, Montanari, D, Myalski, S, Petrache, C, Pfuetzner, M, Pietri, S, Podolyak, Z, Prokopowicz, W, Rudolph, D, Saito, N, Saito, TR, Saltarelli, A, Simpson, GS, Styczen, J, Vermeulen, N, Werner-Malento, E, Wieland, O, Wollersheim, HJ, and Zieblinski, M

Published
2010

91. Search for one-phonon mixed-symmetry states in the radioactive nucleus Nd-140

Author

Gladnishki, K. A., Rainovski, G., Petkov, P., Jolie, J., Pietralla, N., Blazhev, A., Damyanova, A., Danchev, M., Dewald, A., Fransen, C., Hackstein, M., Karagyozov, D., Moeller, O., Pissulla, T., Reese, M., Rother, W., Topchiyska, R., Gladnishki, K. A., Rainovski, G., Petkov, P., Jolie, J., Pietralla, N., Blazhev, A., Damyanova, A., Danchev, M., Dewald, A., Fransen, C., Hackstein, M., Karagyozov, D., Moeller, O., Pissulla, T., Reese, M., Rother, W., and Topchiyska, R.

Abstract

Low-spin excited states of Nd-140 have been studied via the Ce-140(He-3,3n)Nd-140 reaction. The data show that one of the candidates for the one-phonon mixed-symmetry state (MSS) of Nd-140, namely, the 2(3)(+) state at 2140 keV with an effective lifetime of 220(90) fs, exhibits a fast M1 decay to the 2(1)(+) state. Thus, this state can be considered, at least, as a fragment of the one-phonon MSS of Nd-140. This is the first example where mixed symmetry character is tentatively assigned to a state of an unstable nucleus from the mass A approximate to 140 region based on the data on absolute M1 transition rates. However, the data are not conclusive on whether this decay exhausts the total M1 strength or whether the one-phonon MSS of Nd-140 is fragmented.

Published
2010

92. Local suppression of collectivity in theN=80isotones at theZ=58subshell closure

Author

Bauer, C., primary, Rainovski, G., additional, Pietralla, N., additional, Bianco, D., additional, Blazhev, A., additional, Bloch, T., additional, Bönig, S., additional, Damyanova, A., additional, Danchev, M., additional, Gladnishki, K. A., additional, Kröll, T., additional, Leske, J., additional, Lo Iudice, N., additional, Möller, T., additional, Moschner, K., additional, Pakarinen, J., additional, Reiter, P., additional, Scheck, M., additional, Seidlitz, M., additional, Siebeck, B., additional, Stahl, C., additional, Stegmann, R., additional, Stora, T., additional, Stoyanov, Ch., additional, Tarpanov, D., additional, Vermeulen, M. J., additional, Voulot, D., additional, Warr, N., additional, Wenander, F., additional, Werner, V., additional, and De Witte, H., additional

Published
2013
Full Text
View/download PDF

93. g-factor measurements on relativistic isomeric beams produced by fragmentation and U-fission: the g-Rising project at GSI

Author

Neyens, G., Atanasova, L., Balabanski, D. L., Becker, F., Bednarczyk, P., Caceres, L., Doornenbal, P., Gerl, J., Gorska, M., Grebosz, J., Hass, M., Ilie, G., Kurz, N., Kojouharov, I., Lozeva, R., Maj, A., Pfutzner, M., Pietri, S., Podolyak, Z., Prokopowicz, W., Saitoh, T. R., Schaffner, H., Simpson, G., Vermeulen, N., Werner-Malento, E., Walker, J., Wollersheim, H. J., Bazzacco, D., Benzoni, G., Blazhev, A., Blasi, N., Bracco, A., Brandau, C., Camera, F., Chamoli, S. K., Chmel, S., Crespi, F. C. L., Daugas, J. M., Rydt, M., Detistov, P., Fahlander, C., Farnea, E., Georgiev, G., Gladnishki, K., Hoischen, R., Ionescu-Bujor, M., Iordachescu, A., Jolie, J., Jungclaus, A., Kmiecik, M., Krasznahorkay, A., Kulessa, R., Lakshmi, S., Lo Bianco, G., Mallion, S., Mazurek, K., Meczynski, W., Montanari, D., Myalsky, S., Perru, O., Rudolph, D., Rusev, G., Saltarelli, A., Schwengner, R., Styczen, J., Turzo, K., Valiente-Dobon, J. J., Wieland, O., Zieblinski, M., Neyens, G., Atanasova, L., Balabanski, D. L., Becker, F., Bednarczyk, P., Caceres, L., Doornenbal, P., Gerl, J., Gorska, M., Grebosz, J., Hass, M., Ilie, G., Kurz, N., Kojouharov, I., Lozeva, R., Maj, A., Pfutzner, M., Pietri, S., Podolyak, Z., Prokopowicz, W., Saitoh, T. R., Schaffner, H., Simpson, G., Vermeulen, N., Werner-Malento, E., Walker, J., Wollersheim, H. J., Bazzacco, D., Benzoni, G., Blazhev, A., Blasi, N., Bracco, A., Brandau, C., Camera, F., Chamoli, S. K., Chmel, S., Crespi, F. C. L., Daugas, J. M., Rydt, M., Detistov, P., Fahlander, C., Farnea, E., Georgiev, G., Gladnishki, K., Hoischen, R., Ionescu-Bujor, M., Iordachescu, A., Jolie, J., Jungclaus, A., Kmiecik, M., Krasznahorkay, A., Kulessa, R., Lakshmi, S., Lo Bianco, G., Mallion, S., Mazurek, K., Meczynski, W., Montanari, D., Myalsky, S., Perru, O., Rudolph, D., Rusev, G., Saltarelli, A., Schwengner, R., Styczen, J., Turzo, K., Valiente-Dobon, J. J., Wieland, O., and Zieblinski, M.

Abstract

Within the RISING (Rare ISotope INvestigations @ GSI) Collabora-tion at GSI, g factor measurements have been performed on isomeric states in neutron-rich isotopes approaching 132 Sn and in the neutron deficient Pb-region (the g-RISING campaign). We present the experimental technique and some typical aspects related to such studies on relativistic beams selected with the FRS fragment separator. First results are presented for the (19/2+ ) 4.5 µs isomeric state in 127 Sn, which has been produced by means of fission of a relativistic 238 U beam on the one hand, and by the fragmentation of a relativistic 136 Xe beam on the other hand. Spin-alignment has been observed in both reactions. It was the first time that spin-alignment has been established in a relativistic fission reaction.

Published
2007

94. Triaxial deformation and nuclear shape transition in192Au

Author

Oktem, Y., primary, Balabanski, D. L., additional, Akkus, B., additional, Susam, L. Amon, additional, Atanasova, L., additional, Beausang, C. W., additional, Cakirli, R. B., additional, Casten, R. F., additional, Danchev, M., additional, Djongolov, M., additional, Ganioğlu, E., additional, Gladnishki, K. A., additional, Goon, J. Tm., additional, Hartley, D. J., additional, Hecht, A. A., additional, Krücken, R., additional, Novak, J. R., additional, Rainovski, G., additional, Riedinger, L. L., additional, Venkova, T., additional, Yigitoglu, I., additional, Zamfir, N. V., additional, and Zeidan, O., additional

Published
2012
Full Text
View/download PDF

95. On the origin of low-lyingM1 strength in even-even nuclei

Author

Rainovski, G, primary, Danchev, M, additional, Pietralla, N, additional, Gargano, A, additional, Covello, A, additional, Baktash, C, additional, Beene, J R, additional, Bingham, C R, additional, A, Galindo-Uribarri, additional, Gladnishki, K A, additional, Gross, C J, additional, Ponomarev, V Yu, additional, Radford, D C, additional, Riedinger, L L, additional, Scheck, M, additional, Stuchbery, A E, additional, Wambach, J, additional, Yu, C-H, additional, and Zamfir, N V, additional

Published
2012
Full Text
View/download PDF

96. Search for one-phonon mixed-symmetry states in the radioactive nucleus140Nd

Author

Gladnishki, K A, primary, Rainovski, G, additional, Petkov, P, additional, Jolie, J, additional, Pietralla, N, additional, Blazhev, A, additional, Damyanova, A, additional, Danchev, M, additional, Dewald, A, additional, Fransen, C, additional, Hackstein, M, additional, Möller, O, additional, Pissulla, T, additional, Reese, M, additional, and Rother, W, additional

Published
2012
Full Text
View/download PDF

97. One-phonon isovector 2+1,MSstate in the neutron rich nucleus132Te

Author

Danchev, M, primary, Rainovski, G, additional, Pietralla, N, additional, Gargano, A, additional, Covello, A, additional, Baktash, C, additional, Beene, J R, additional, Bingham, C R, additional, Galindo-Uribarri, A, additional, Gladnishki, K A, additional, Gross, C J, additional, Ponomarev, V Yu, additional, Radford, D C, additional, Riedinger, L L, additional, Scheck, M, additional, Stuchbery, A E, additional, Wambach, J, additional, Yu, C -H, additional, and Zamfir, N V, additional

Published
2012
Full Text
View/download PDF

98. Coulomb excitation of the 3−isomer in70Cu

Author

Rapisarda, E., primary, Stefanescu, I., additional, Balabanski, D. L., additional, Bastin, B., additional, Blazhev, A., additional, Bree, N., additional, Danchev, M., additional, Bruyneel, B., additional, Davinson, T., additional, Delahaye, P., additional, Diriken, J., additional, Eberth, J., additional, Georgiev, G., additional, Fedorov, D., additional, Fedosseev, V. N., additional, Fiori, E., additional, Franchoo, S., additional, Fransen, Ch., additional, Geibel, K., additional, Gladnishki, K., additional, Hadynska, K., additional, Hess, H., additional, Heyde, K., additional, Huyse, M., additional, Ivanov, O., additional, Iwanicki, J., additional, Jolie, J., additional, Kalkuehler, M., additional, Kröll, Th., additional, Krücken, R., additional, Köster, U., additional, Lo Bianco, G., additional, Lozeva, R., additional, Marsh, B. A., additional, Nardelli, S., additional, Nowacki, F., additional, Patronis, N., additional, Reiter, P., additional, Seidlitz, M., additional, Sieja, K., additional, Smirnova, N., additional, Srebrny, J., additional, Van de Walle, J., additional, Van Duppen, P., additional, Warr, N., additional, Wenander, F., additional, Wimmer, K., additional, Wrzosek, K., additional, Zemlyanoi, S., additional, and Zielinska, M., additional

Published
2011
Full Text
View/download PDF

99. One-phonon isovector21,MS+state in the neutron-rich nucleus132Te

Author

Danchev, M., primary, Rainovski, G., additional, Pietralla, N., additional, Gargano, A., additional, Covello, A., additional, Baktash, C., additional, Beene, J. R., additional, Bingham, C. R., additional, Galindo-Uribarri, A., additional, Gladnishki, K. A., additional, Gross, C. J., additional, Ponomarev, V. Yu., additional, Radford, D. C., additional, Riedinger, L. L., additional, Scheck, M., additional, Stuchbery, A. E., additional, Wambach, J., additional, Yu, C.-H., additional, and Zamfir, N. V., additional

Published
2011
Full Text
View/download PDF

100. E0 decay of the 0+2levels in156Dy and160Er

Author

Bianco, G Lo, primary, Balabanski, D L, additional, Nardelli, S, additional, Gupta, S Das, additional, Blasi, N, additional, Gladnishki, K, additional, Saltarelli, A, additional, and Fortunato, L, additional

Published
2011
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results