Spectroscopy of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">I</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>123</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>

Excited states in 129 I were populated with the 124 Sn( 7 Li,2n) reaction at 23 MeV. In-beam measurements of gamma-ray coincidences were performed with an array of eight HPGe detectors and five LaBr 3 (Ce) scintillation detectors. Based on the γγ coincidence data, a positive parity band structure built on the 7/2 + ground state was established and the πg 7/2 configuration at oblate deformation was assigned to it. The results are compared to Interacting Boson-Fermion model (IBFM) and Total Routhian Surface (TRS) calculations.

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“…[7], and is consistent with the excitation energy systematics in the iodine isotopes shown in Fig. 4 [22][23][24][25].…”

Section: Introductionsupporting

confidence: 65%

Excited states in129I

et al. 2013

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“…Such a high-K orbital is responsible for the strong interband I = 1 transitions. The observed level staggering in this band may be caused by the mixing of the πg 7/2 and πd 5/2 configurations and the triaxial deformation as suggested in 123 I [28]. The oblate deformation for band B can be obtained experimentally from γ -ray angular distributions.…”

Section: Bands B and C Associated With The π G 7/2 And π D 5/2 Configmentioning

confidence: 60%

High-spin states in127I

et al. 2012

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In-beam γ spectroscopy of the stable nucleus 127 I has been studied experimentally using the 124 Sn( 7 Li, 4nγ ) 127 I reaction at a beam energy of 32 MeV. The high-spin level scheme of 127 I is extended significantly. Negative-parity levels built on the 11/2 − , πh 11/2 particle state are observed up to (35/2 − ) and described as a decoupled band, extending our knowledge of decoupled structures to the most neutron-rich stable iodine isotope. Two I = 2 yrast positive-parity sequences are proposed to be associated with the πg 7/2 configuration due to observations of several strong interband transitions, and two weakly populated I = 2 positive-parity bands are newly identified and interpreted as arising mainly from the πd 5/2 configuration. Three-quasiparticle configurations are assigned to the I π = 15/2 + and 23/2 + states according to the existing knowledge in neighboring nuclei; irregular noncollective and regular collective excitations built on these two (15/2 + and 23/2 + ) states are observed to coexist at similar energies. The observed three-quasiparticle band structures are further interpreted with the aid of configuration-constrained potential energy surface calculations.

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“…Recent experimental results [5,6] on the structures of 12lI and lZ3I give indications of possible coexistence of different shapes in these nuclei. = 1 band based on the 5/2 + ground state having similar characteristics has been reported recently [6]. The AI = 1 and AI =-2 bands based on the 9/2 + and the 11/2-states, respectively, are well established experimentally.…”

Section: Introductionmentioning

confidence: 98%

Band structures of121,123I

Goswami

Sethi

Sarkar

et al. 1995

Z. Physik A - Hadrons and Nuclei

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The band structures of 121,1231 nuclei have been studied using a version of the particle-rotor-model in which the experimental excitation energies of the neighbouring (A-l) cores can be fed directly as input parameters. The calculations have been carried out with axially symmetric Nilsson potential with both prolate and oblate deformations. The parameters of the model have been chosen from earlier theoretical work and experimental odd-even mass differences. Only the Coriolis attenuation factor has been treated as adjustable parameter. The theoretical band structures are in very good agreement with the available experimental data.

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Spectroscopy ofI123

Cited by 30 publications

References 16 publications

Excited states in129I

Excited states in129I

High-spin states in127I

Band structures of121,123I

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