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Title: High-spin states in odd-odd 168Tm

Abstract

High-spin states in 168Tm were investigated by means of {gamma}-ray spectroscopy techniques using the GASP multidetector array. Rotational bands have been established and identified in terms of their configurations.

Authors:
; ; ; ;  [1];  [2]; ; ;  [3];  [4];  [5];  [4]; ; ;  [1]; ;  [6];  [7]
  1. Departamento de Fisica, CNEA, Buenos Aires (Argentina)
  2. (Argentina)
  3. Dipartimento di Fisica, Sezione di Padova, Padova (Italy)
  4. (Italy)
  5. Dipartimento di Fisica, Sezione di Milano, Milan (Italy)
  6. INFN, Laboratori Nazionali di Legnaro, Legnaro (Italy)
  7. Dipartimento di Matematica e Fisica, Universita di Camerino, Camerino (Italy)
Publication Date:
OSTI Identifier:
21054861
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 884; Journal Issue: 1; Conference: 6. Latin American symposium on nuclear physics and applications, Iguazu (Argentina), 3-7 Oct 2005; Other Information: DOI: 10.1063/1.2710623; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; GAMMA DETECTION; GAMMA SPECTROSCOPY; HIGH SPIN STATES; NUCLEAR STRUCTURE; ROTATIONAL STATES; THULIUM 168

Citation Formats

Cardona, M. A., Hojman, D., Davidson, J., Davidson, M., Kreiner, A. J., CONICET, Buenos Aires, Bazzacco, D., Lenzi, S. M., Rossi Alvarez, C., INFN, Sezione di Padova, Padova, Blasi, N., INFN, Sezione di Milano, Milan, Debray, M. E., Levinton, G., Marti, G., De Poli, M., Napoli, D. R., and Lo Bianco, G. High-spin states in odd-odd 168Tm. United States: N. p., 2007. Web. doi:10.1063/1.2710623.
Cardona, M. A., Hojman, D., Davidson, J., Davidson, M., Kreiner, A. J., CONICET, Buenos Aires, Bazzacco, D., Lenzi, S. M., Rossi Alvarez, C., INFN, Sezione di Padova, Padova, Blasi, N., INFN, Sezione di Milano, Milan, Debray, M. E., Levinton, G., Marti, G., De Poli, M., Napoli, D. R., & Lo Bianco, G. High-spin states in odd-odd 168Tm. United States. doi:10.1063/1.2710623.
Cardona, M. A., Hojman, D., Davidson, J., Davidson, M., Kreiner, A. J., CONICET, Buenos Aires, Bazzacco, D., Lenzi, S. M., Rossi Alvarez, C., INFN, Sezione di Padova, Padova, Blasi, N., INFN, Sezione di Milano, Milan, Debray, M. E., Levinton, G., Marti, G., De Poli, M., Napoli, D. R., and Lo Bianco, G. Mon . "High-spin states in odd-odd 168Tm". United States. doi:10.1063/1.2710623.
@article{osti_21054861,
title = {High-spin states in odd-odd 168Tm},
author = {Cardona, M. A. and Hojman, D. and Davidson, J. and Davidson, M. and Kreiner, A. J. and CONICET, Buenos Aires and Bazzacco, D. and Lenzi, S. M. and Rossi Alvarez, C. and INFN, Sezione di Padova, Padova and Blasi, N. and INFN, Sezione di Milano, Milan and Debray, M. E. and Levinton, G. and Marti, G. and De Poli, M. and Napoli, D. R. and Lo Bianco, G.},
abstractNote = {High-spin states in 168Tm were investigated by means of {gamma}-ray spectroscopy techniques using the GASP multidetector array. Rotational bands have been established and identified in terms of their configurations.},
doi = {10.1063/1.2710623},
journal = {AIP Conference Proceedings},
number = 1,
volume = 884,
place = {United States},
year = {Mon Feb 12 00:00:00 EST 2007},
month = {Mon Feb 12 00:00:00 EST 2007}
}
  • This work presents for the first time the high-spin information on the odd-odd neutron deficient nucleus [sup 92]Tc. We have used the reaction [sup 64]Zn([sup 35]Cl,4[ital p]3[ital n])[sup 92]Tc at a beam energy of 140 MeV to populate high-spin states in the [ital N]=49 nucleus [sup 92]Tc. Gamma-ray intensities and [gamma]-[gamma] coincidences were measured. Nineteen new transitions have been found and placed in a level scheme. The positive and negative parity bands have been extended tentatively up to a spin of 17[sup +] and 21[sup [minus]], respectively. The level scheme can be reasonably well understood within the ([ital p][sub 1/2],[italmore » g][sub 9/2]) model space and breaking of the [ital N]=50 neutron core. We have observed two discrepancies in the earlier work on the low-lying states in [sup 92]Tc.« less
  • To continue their systematic study of odd-odd nuclei in the mass 160 region, and to further investigate the abnormal band-crossing frequencies observed in a number of odd-odd Tm and Lu isotopes, the authors studied {sup 158}Ho and {sup 156}Ho recently at the Lawrence Berkeley Laboratory. High spin states of {sup 158}Ho and {sup 156}Ho were populated using the {sup 150}Nd({sup 14}N,6n) and {sup 148}Nd({sup 14}N,6n) reactions at beam energies of 92 and 96 MeV, respectively. Gamma rays were detected by the 36 Ge detectors of the Gammasphere Phase I array. About 1 billion and 800 million triple- or higher-fold coincidentmore » events were collected for the {sup 158}Ho and {sup 156}Ho experiments, respectively. These data were sorted into cubes and analyzed by the computer code {open_quotes}LEVIT8R{close_quotes}. The preliminary results have established multiple rotational bands in both nuclei. The band crossings, relative transition probabilities and other high spin properties especially concerning odd-odd nuclei will be discussed in comparison with either neighboring even-even, and odd-odd isotopes and isotones.« less
  • The parities of high-spin bands in the odd-odd nucleus {sup 72}As have been established by measurements of the angular distributions and linear polarizations of the decay {gamma} rays via the {sup 62}Ni({sup 13}C,p2n) reaction at a beam energy of 48.5 MeV. In particular, the parity change determined between the 8{sup +} and 7{sup {minus}} states leads to positive parity for the yrast high-spin band. This band and the electromagnetic transition strengths within it are interpreted based on microscopic calculations using the VAMPIR model as arising from the intruder ({pi}g{sub 9/2}{circle_times}{nu}g{sub 9/2}) configuration. {copyright} {ital 1998} {ital The American Physical Society}
  • The properties of high-spin states in /sup 212/At, including three isomers, have been studied with the /sup 208/Pb(/sup 7/Li,3n)/sup 212/At reaction. In-beam measurements with Ge(Li) and intrinsic Ge detectors of ..gamma..-ray excitation functions, ..gamma..-..gamma.. coincidences, ..gamma..-ray angular distributions, pulsed-beam-..gamma.. timing, and perturbed angular distributions with an applied magnetic field were made to establish a decay scheme, level energies, ..gamma..-ray multipolarities, spin-parity assignments, isomeric lifetimes, and g factors. High-spin states up to 15h were identified as predominantly three proton ((..pi..h/sub 9/2/)/sup 3/ or (..pi..h/sub 9/2/)/sup 2/(..pi..i/sub 13/2/)) states of the (N=126) /sup 211/At nucleus coupled to a neutron in either themore » g/sub 9/2/, i/sub 11/2/, or j/sub 15/2/ orbitals. The experimental energy levels, g factors, and B (M2) value are compared with shell model calculations.« less
  • The odd-odd {sup 146}Tb nucleus has been investigated using the {sup 115}In({sup 34}S,3n) reaction at 140 MeV incident energy using an array of eight Compton-suppressed Clover detectors. Based on the observed {gamma}-{gamma} coincidences, the level structure of {sup 146}Tb has been extended up to E{sub x}{approx}10 MeV. Linear polarization measurements have been combined with angular correlations of the observed {gamma} rays to assign the electromagnetic nature to the transitions. Probable origin of a cascade of M1 transitions observed around 8 MeV excitation energy has been discussed.