Identification of band structures and proposed one- and two-phonon γ-vibrational bands in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi mathvariant="normal">Mo</mml:mi><mml:mprescripts /><mml:none /><mml:mrow><mml:mn>105</mml:mn></mml:mrow></mml:mmultiscripts></mml:math>

Ding, H. B.; Zhu, S. J.; Hamilton, J. H.; Ramayya, A. V.; Hwang, J. K.; Li, K.; Luo, Y. X.; Rasmussen, J. O.; Lee, I. Y.; Goodin, C.; L., X.; Chen, Y. J.; Li, M. L.

doi:10.1103/physrevc.74.054301

Cited by 39 publications

(10 citation statements)

References 38 publications

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“…[6]. The first observation was made 10 years later in 105 Mo [7]. Soon after this, similar bands were observed in 103 Nb [8] and in 107 Tc [9].…”

Section: Introductionsupporting

confidence: 55%

Single-phonon and multi-phonon excitations of theγvibration in rotating odd-Anuclei

Matsuzaki

2014

Phys. Rev. C

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Background: Collective motions in quantum many-body systems are described as bosonic excitations. Multiphonon excitations in atomic nuclei, however, were observed very rarely. In particular, the first two-phonon γ vibrational (2γ ) excitation in odd-A nuclei was reported in 2006 and only a few have been known so far. Two theoretical calculations for the data on 103 Nb were performed, one of which was done by the present author within a limited model space up to 2γ basis states. Quite recently, conspicuously enhanced B(E2)s, reduced E2 transition probabilities, feeding 2γ states were observed in 105 Nb and conjectured that their parent states, called band (4), are candidates of 3γ states. Purpose: In the present work, the model space is enlarged up to 4γ basis states. The purpose is twofold: One is to see how the description of 2γ eigenstates in the previous work is improved, and the other is to examine the existence of collective 3γ eigenstates, and when they exist, study their collectivity through calculating interband B(E2)s. Method:The particle-vibration coupling model based on the cranking model and the random-phase approximation is used to calculate the vibrational states in rotating odd-A nuclei. Interband B(E2)s are calculated by adopting the method of the generalized intensity relation. Results: The present model reproduces well the energy spectra and B(E2)s of 0γ -2γ states in 103 Nb and 105 Nb. For 3γ states, calculated spectra indicate that the most collective state with the highest K at zero rotation feels strong Coriolis force after rotation sets in and consequently is observed with lowered K, where K is the projection of the angular momentum to the z axis. The calculated states account for the observed enhanced B(E2)s within factors of 2-3. Conclusions:The present calculation with the enlarged model space reproduces the observed 0γ -2γ states well and predicts properties of collective 3γ states. The most collective one is thought to be the main component of the observed band (4) from the analyses of the energy spectra and interband B(E2)s although some mixing with states that are not included in the present model would be possible.

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“…[6]. The first observation was made 10 years later in 105 Mo [7]. Soon after this, similar bands were observed in 103 Nb [8] and in 107 Tc [9].…”

Section: Introductionsupporting

confidence: 55%

Single-phonon and multi-phonon excitations of theγvibration in rotating odd-Anuclei

Matsuzaki

2014

Phys. Rev. C

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“…In Refs. [14,15], the 4 + state at 1843 keV was put in band (2). However, according to the systematical comparisons, the observed level energy of 4 + state in the 2γ band in other nuclei is generally higher than that in the 1γ band, so we assign the 4 + (1842.7 keV) state as the bandhead of the quasi-2γ band in 138 Nd.…”

mentioning

confidence: 84%

“…Until now, one-phonon γ -vibrational bands (1γ bands) have been found in many mass regions. Two-phonon γ -vibrational bands (2γ bands) have been identified also, such as in 104,105,106 Mo [1][2][3] and 103 Nb [4] in the A = 100 region, and in 154 Gd [5] and 166,168 Er [6,7] in the A = 160 region. For the A = 130-140 region, 1γ bands have been reported in many cases, for example, in 132,134,136 Nd [8][9][10].…”

mentioning

confidence: 98%

Multiphononγ-vibrational bands in theγ-soft nucleus138Nd

Zhang

Zhu

et al. 2013

Phys. Rev. C

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The low spin states of 138 Nd have been reinvestigated via the 124 Te( 19 F,4n1p) reaction at a beam energy of 103 MeV. The quasi-one-phonon γ -vibrational band based on the 1013.7 keV level has been expanded and the quasi-two-phonon γ -vibrational band built on the 1842.7 keV level has been proposed. A systematic comparison supports our assignments for multiphonon γ -vibrational bands in 138 Nd. The characteristics of γ softness in 138 Nd have been discussed. Triaxial projected shell model calculations can well describe the rotational feature of the bands, but they fail to reproduce simultaneously the bandhead energies of the two γ -vibrational bands if a fixed triaxial deformation is assumed.

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“…In A = 80 − 90 neutron deficient nuclei, both protons and neutrons occupy g 9/2 orbits which have a strong shape-driving force that accounts for the stable γ deformations in Zirconium and Molybdenum isotopes. On the other hand, due to the decrease in collectivity, the γ-softness and γ-vibration which have been found in heavier Zirconium and Molybdenum isotopes [15,16] may also occur in transitional nuclei 84,86 Mo. However, it is hard to distinguish the γ vibration and stable γ deformation from experimental data [17,18].…”

Section: Introductionmentioning

confidence: 91%

Shape change induced by g 9/2 rotational alignment in 84,86Mo

Liu

Shi

Fang

2011

Sci. China Phys. Mech. Astron.

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Neutron-deficient Z ≈ N nuclei 84,86 Mo have been investigated using pairing-deformation self-consistent cranked shell model calculations up to spin I > 20 . Our calculations are in good agreement with the experimental data, indicating γ-soft triaxial shapes at low rotational frequency and well-deformed triaxial-oblate shapes at high rotational frequency for both nuclei. The shape change is due to the alignments of the g 9/2 protons and g 9/2 neutrons.shape change, cranked shell model, molybdenum

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Identification of band structures and proposed one- and two-phonon γ-vibrational bands inMo105

Cited by 39 publications

References 38 publications

Single-phonon and multi-phonon excitations of theγvibration in rotating odd-Anuclei

Single-phonon and multi-phonon excitations of theγvibration in rotating odd-Anuclei

Multiphononγ-vibrational bands in theγ-soft nucleus138Nd

Shape change induced by g 9/2 rotational alignment in 84,86Mo

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