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Shroy, R.E.; Gordon, David; Gai, M.; Fossan, D. B.; Gaigalas, Adolfas K.

doi:10.1103/physrevc.26.1089

Cited by 47 publications

(43 citation statements)

References 27 publications

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“…Systematic experimental investigations of high-spin states using heavy-ion-induced fusionevaporation reactions have revealed the collective properties of the odd-A isotopes up to 127 I [1][2][3]. At the other extreme, the excited states in the closed neutron-shell isotope 135 I can be described well in terms of three-proton configurations, except for the levels above 4.2 MeV that involve the valence protons coupled to particle-hole excitations across the N = 82 shell closure [4].…”

Section: Introductionmentioning

confidence: 99%

Multi-quasiparticle isomers involving proton-particle and neutron-hole configurations inI131andI133<

et al. 2009

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The nuclei 131 I and 133 I have been populated in multinucleon transfer reactions between 136 Xe ions and various targets, and their structure has been investigated by time-correlated γ -ray coincidence spectroscopy and the measurement of γ -ray angular correlations. A 19/2 − isomer at 1918 keV, with a half-life of 24(1) µs, has been identified in 131 I, as well as nanosecond isomers with J π = 23/2 + in both isotopes. A T 1/2 = 25(3) ns isomer at 4308 keV in 131 I is suggested to have J π = (31/2 − , 33/2 − ) and is primarily attributed to the coupling of an odd proton in the d 5/2 or g 7/2 orbit with the (π 2 ) 0 + (νh −3 11/2 d −1 3/2 ) 15 − configuration in 130 Te responsible for the 15 − isomer in that nucleus. The observed level properties are compared with predictions of a shell-model calculation.

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Section: Introductionmentioning

confidence: 99%

Multi-quasiparticle isomers involving proton-particle and neutron-hole configurations inI131andI133<

et al. 2009

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“…2, the level scheme of 128 I displays irregular level spacings and many parallel decay branches, indicating that the excited states are most probably formed by the quasiparticle excitations. In the odd-A iodine isotopes, the πg 7/2 and πd 5/2 intrinsic states were identified to be the two lowest-lying levels, and the next available πh 11/2 state lies around 1.2 MeV in excitation energy [4]. In the neighboring even-Z, odd-N isotones, the lowest single-particle states are formed by the single valence neutron in either the d 3/2 or s 1/2 orbital and the higher-lying states correspond to the h 11/2 neutron excitations [29].…”

Section: A Low-lying Level Structure Amentioning

confidence: 99%

“…The wide variety of structural features are naturally expected in the iodine isotopes with Z = 53; therefore experimental and theoretical efforts have been devoted to the iodine isotopic series during the past two decades [3][4][5][6]. Experimentally, both the I = 1 coupled bands built on the deformed 9/2 + proton-hole states and collective bands built on the low-lying πg 7/2 , πd 5/2 , and πh 11/2 intrinsic states have been systematically observed in the odd-A iodine nuclei [3,7,8].…”

Section: Introductionmentioning

confidence: 99%

High-spin level scheme of doubly odd128I

et al. 2012

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High-spin states in the odd-odd 128 I have been studied experimentally using the 124 Sn( 7 Li, 3nγ ) 128 I reaction at beam energies of 28 and 32 MeV. A level scheme built on the known T 1/2 = 175 ns, (6 − ) isomer has been established. The low-lying states in the level scheme have been proposed to be associated with the πd 5/2 ⊗ νh 11/2 and πg 7/2 ⊗ νh 11/2 two-quasiparticle excitations. The strongly populated negative-parity states, forming a bandlike structure, have been assigned to be based on the πg 7/2 ⊗ νh 11/2 configuration. The πh 11/2 ⊗ νh 11/2 multiplet 9 + , 10 + , and 11 + members have been identified according to the systematics of the corresponding level structures observed in the lighter odd-odd iodine isotopes. The two-quasiparticle configuration assignments are supported by the nucleon pair approximation and empirical shell-model calculations.

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“…These experiments have led to significant additions and alterations to the level scheme of ½¾ I reported earlier in the literature [3][4][5]. The level scheme based on the recent new data is given in ref.…”

Section: Introductionmentioning

confidence: 98%

Particle-rotor-model calculations in 125I

et al. 2001

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Recent experimental data on ½¾ I has revealed several interesting structural features. These include the observation of a three quasiparticle band, prolate and oblate deformed bands, signature inversion in the yrast positive-parity band and identification of the unfavoured ½½ ¾ band showing very large signature splitting. In the present work, particle-rotor-model calculations have been performed for the ½½ ¾ band, using an axially symmetric deformed Nilsson potential. The calculations reproduce the experimental results well and predict a moderate prolate quadrupole deformation of about 0.2 for the band.

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Collective properties of the odd-mass I nuclei:I123,125,127

Cited by 47 publications

References 27 publications

Multi-quasiparticle isomers involving proton-particle and neutron-hole configurations inI131andI133<

Multi-quasiparticle isomers involving proton-particle and neutron-hole configurations inI131andI133<

High-spin level scheme of doubly odd128I

Particle-rotor-model calculations in 125I

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