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Title: Collective rotation and vibration in neutron-rich {sup 180,182}Hf nuclei

Abstract

High-spin states in neutron-rich {sup 180}Hf and {sup 182}Hf nuclei were populated through inelastic and transfer reactions with a {sup 136}Xe beam incident on a thin {sup 180}Hf target, and investigated using particle-{gamma} coincidence techniques. New collective band structures were observed, and previously known rotational and vibrational bands in these nuclei were extended to higher angular momenta. No obvious nucleon alignment was observed in the ground state band of either nucleus up to ({Dirac_h}/2{pi}){omega}=0.43 MeV, a significant delay compared to lighter even-even Hf isotopes. Woods-Saxon cranking calculations were performed to predict the nature of the first band crossings and shape evolution in {sup 180,182}Hf.

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ;  [1];  [2];  [2] more »;  [2];  [3];  [3];  [3] « less
  1. Department of Physics, University of Massachusetts Lowell, Lowell, Massachusetts 01854 (United States)
  2. (United States)
  3. (United Kingdom)
Publication Date:
OSTI Identifier:
20995118
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 3; Other Information: DOI: 10.1103/PhysRevC.75.034305; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ANGULAR MOMENTUM; GROUND STATES; HAFNIUM 180; HAFNIUM 182; HIGH SPIN STATES; MEV RANGE; NEUTRONS; OMEGA BARYONS; ROTATION; TRANSFER REACTIONS; VIBRATIONAL STATES; WOODS-SAXON POTENTIAL; XENON 136

Citation Formats

Ngijoi-Yogo, E., Tandel, S. K., Mukherjee, G., Shestakova, I., Chowdhury, P., Wu, C. Y., Cline, D., Hayes, A. B., Teng, R., Clark, R. M., Fallon, P., Macchiavelli, A. O., Vetter, K., Kondev, F. G., Langdown, S., Walker, P. M., Wheldon, C., Cullen, D. M., Nuclear Structure Research Laboratory, University of Rochester, Rochester, New York 14627, Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Argonne National Laboratory, Argonne, Illinois 60439, Department of Physics, University of Surrey, Guildford GU2 7XH, Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, and Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL. Collective rotation and vibration in neutron-rich {sup 180,182}Hf nuclei. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.034305.
Ngijoi-Yogo, E., Tandel, S. K., Mukherjee, G., Shestakova, I., Chowdhury, P., Wu, C. Y., Cline, D., Hayes, A. B., Teng, R., Clark, R. M., Fallon, P., Macchiavelli, A. O., Vetter, K., Kondev, F. G., Langdown, S., Walker, P. M., Wheldon, C., Cullen, D. M., Nuclear Structure Research Laboratory, University of Rochester, Rochester, New York 14627, Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Argonne National Laboratory, Argonne, Illinois 60439, Department of Physics, University of Surrey, Guildford GU2 7XH, Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, & Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL. Collective rotation and vibration in neutron-rich {sup 180,182}Hf nuclei. United States. doi:10.1103/PHYSREVC.75.034305.
Ngijoi-Yogo, E., Tandel, S. K., Mukherjee, G., Shestakova, I., Chowdhury, P., Wu, C. Y., Cline, D., Hayes, A. B., Teng, R., Clark, R. M., Fallon, P., Macchiavelli, A. O., Vetter, K., Kondev, F. G., Langdown, S., Walker, P. M., Wheldon, C., Cullen, D. M., Nuclear Structure Research Laboratory, University of Rochester, Rochester, New York 14627, Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, Argonne National Laboratory, Argonne, Illinois 60439, Department of Physics, University of Surrey, Guildford GU2 7XH, Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, and Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL. Thu . "Collective rotation and vibration in neutron-rich {sup 180,182}Hf nuclei". United States. doi:10.1103/PHYSREVC.75.034305.
@article{osti_20995118,
title = {Collective rotation and vibration in neutron-rich {sup 180,182}Hf nuclei},
author = {Ngijoi-Yogo, E. and Tandel, S. K. and Mukherjee, G. and Shestakova, I. and Chowdhury, P. and Wu, C. Y. and Cline, D. and Hayes, A. B. and Teng, R. and Clark, R. M. and Fallon, P. and Macchiavelli, A. O. and Vetter, K. and Kondev, F. G. and Langdown, S. and Walker, P. M. and Wheldon, C. and Cullen, D. M. and Nuclear Structure Research Laboratory, University of Rochester, Rochester, New York 14627 and Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 and Argonne National Laboratory, Argonne, Illinois 60439 and Department of Physics, University of Surrey, Guildford GU2 7XH and Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE and Department of Physics and Astronomy, University of Manchester, Manchester M13 9PL},
abstractNote = {High-spin states in neutron-rich {sup 180}Hf and {sup 182}Hf nuclei were populated through inelastic and transfer reactions with a {sup 136}Xe beam incident on a thin {sup 180}Hf target, and investigated using particle-{gamma} coincidence techniques. New collective band structures were observed, and previously known rotational and vibrational bands in these nuclei were extended to higher angular momenta. No obvious nucleon alignment was observed in the ground state band of either nucleus up to ({Dirac_h}/2{pi}){omega}=0.43 MeV, a significant delay compared to lighter even-even Hf isotopes. Woods-Saxon cranking calculations were performed to predict the nature of the first band crossings and shape evolution in {sup 180,182}Hf.},
doi = {10.1103/PHYSREVC.75.034305},
journal = {Physical Review. C, Nuclear Physics},
number = 3,
volume = 75,
place = {United States},
year = {Thu Mar 15 00:00:00 EDT 2007},
month = {Thu Mar 15 00:00:00 EDT 2007}
}