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Title: Detailed high-spin spectroscopy and the search for the wobbling mode in {sup 171}Ta

Abstract

High-spin states in {sup 171}Ta were populated in the {sup 124}Sn({sup 51}V,4n) reaction at 228 MeV to search for evidence of stable triaxial deformation. Identification of a wobbling sequence based on the previously known {pi}i{sub 13/2} structure would provide a unique signature for this rarely observed shape. No such sequence was identified in these data, which suggests that the island of triaxial strongly deformed bands may be smaller than once thought. However, over 200 new transitions and two new bands were placed in the level scheme and the sequence based on the {pi}i{sub 13/2} orbital could be observed up to spin and parity I{sup {pi}}=(101/2{sup +}). The relative excitations of all the sequences were determined and the ground state of {sup 171}Ta was found to have 5/2{sup +} quantum numbers, contrary to previous reports. All of the previously known structures were extended to much higher spin and their high-frequency band crossings are interpreted within the framework of the cranked shell model.

Authors:
; ;  [1]
  1. Department of Physics, U.S. Naval Academy, Annapolis, Maryland 21402 (United States) (and others)
Publication Date:
OSTI Identifier:
20771101
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 72; Journal Issue: 6; Other Information: DOI: 10.1103/PhysRevC.72.064325; (c) 2005 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; EXCITATION; GROUND STATES; HIGH SPIN STATES; MEV RANGE; NUCLEAR DEFORMATION; NUCLEAR STRUCTURE; PARITY; QUANTUM NUMBERS; SHELL MODELS; SPECTROSCOPY; SPIN; TANTALUM 171; TIN 124; VANADIUM 51

Citation Formats

Hartley, D J., Mohr, W.H., and Vanhoy, J.R.. Detailed high-spin spectroscopy and the search for the wobbling mode in {sup 171}Ta. United States: N. p., 2005. Web. doi:10.1103/PhysRevC.72.064325.
Hartley, D J., Mohr, W.H., & Vanhoy, J.R.. Detailed high-spin spectroscopy and the search for the wobbling mode in {sup 171}Ta. United States. doi:10.1103/PhysRevC.72.064325.
Hartley, D J., Mohr, W.H., and Vanhoy, J.R.. Thu . "Detailed high-spin spectroscopy and the search for the wobbling mode in {sup 171}Ta". United States. doi:10.1103/PhysRevC.72.064325.
@article{osti_20771101,
title = {Detailed high-spin spectroscopy and the search for the wobbling mode in {sup 171}Ta},
author = {Hartley, D J. and Mohr, W.H. and Vanhoy, J.R.},
abstractNote = {High-spin states in {sup 171}Ta were populated in the {sup 124}Sn({sup 51}V,4n) reaction at 228 MeV to search for evidence of stable triaxial deformation. Identification of a wobbling sequence based on the previously known {pi}i{sub 13/2} structure would provide a unique signature for this rarely observed shape. No such sequence was identified in these data, which suggests that the island of triaxial strongly deformed bands may be smaller than once thought. However, over 200 new transitions and two new bands were placed in the level scheme and the sequence based on the {pi}i{sub 13/2} orbital could be observed up to spin and parity I{sup {pi}}=(101/2{sup +}). The relative excitations of all the sequences were determined and the ground state of {sup 171}Ta was found to have 5/2{sup +} quantum numbers, contrary to previous reports. All of the previously known structures were extended to much higher spin and their high-frequency band crossings are interpreted within the framework of the cranked shell model.},
doi = {10.1103/PhysRevC.72.064325},
journal = {Physical Review. C, Nuclear Physics},
number = 6,
volume = 72,
place = {United States},
year = {Thu Dec 15 00:00:00 EST 2005},
month = {Thu Dec 15 00:00:00 EST 2005}
}