Exotic Nuclear Excitations

Pancholi, S. C.

doi:10.1007/978-1-4419-8038-0

Cited by 22 publications

(13 citation statements)

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“…Thus, we have succeeded to extend the known level scheme [38] by a new ΔI = 1 band with a negative parity and to determine 8 new lifetimes. The present results come to supercede the preliminary level-scheme published in [39]. More detailed information can be found in [40].…”

Section: Rhsupporting

confidence: 82%

Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems

Tonev

Yavahchova

Angelis

et al. 2016

EPJ Web of Conferences

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Abstract. Two odd-odd nuclei from the A ∼ 100 and A ∼ 130 regions, namely 102 Rh and 134 Pr have been studied in search for chiral doublet bands via 94 Zr( 11 B,3n) 102 Rh and 119 Sn( 19 F,4n) 134 Pr reactions, respectively. Two nearly degenerate bands built on the πg 9/2 ⊗ νh 11/2 configuration have been identified in 102 Rh and on the πg 11/2 ⊗ νh 11/2 configuration for 134 Pr. Lifetimes of excited nuclear states were measured using Dopplershift attenuation method and recoil distance Doppler-shift method. The deexciting gamma rays were registered by the Indian National Gamma Array for 102 Rh and using the EUROBALL IV detector array with an inner Bismuth Germanate (BGO) ball for 134 Pr, respectively. Polarization and angular correlation measurements have been performed to establish the spin and parity assignments for these bands. The derived reduced transition probabilities are compared to the predicitons of the two quasiparticles + triaxial rotor and interacting boson fermion-fermion models.

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Section: Rhsupporting

confidence: 82%

Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems

Tonev

Yavahchova

Angelis

et al. 2016

EPJ Web of Conferences

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“…The well-known backbending phenomenon is caused by pairing being broken through the alignment of two quasiparticles. As the nucleus rotates even faster, more quasiparticles can be aligned such that the nuclear superfluidity can be destroyed at some critical frequency [1,2] and eventually lead to the pairing collapse. The static pairing effect is negligible and only the dynamic pairing will have effects beyond this frequency [3].…”

Section: Introductionmentioning

confidence: 98%

Interpretation of the high spin states inLu161: A paired and unpaired study

Carlsson

Ragnarsson

et al. 2014

Phys. Rev. C

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A paired cranked Nilsson-Strutinsky-Bogoliubov (CNSB) model is presented, which employs the same method to calculate the liquid-drop energy and moment of inertia as the unpaired cranked Nilsson-Strutinsky (CNS) model. In the CNSB model, the energy minimization is carried out in the mesh of pairing gaps and Fermi levels λ as well as deformation parameters. The high spin states in 161 Lu are then investigated with the CNSB and CNS models. The terminating structure shows a striking similarity with these two models. Combining the CNSB and CNS models, a complete understanding of high spin structures, including the normal deformed (ND) and triaxial strongly deformed (TSD) bands and observed side bands in 161 Lu, is achieved. It appears that the only important paired crossings are the first i 13/2 neutron crossing and the first h 11/2 proton crossing. For the description of the unpaired high spin crossings, it is important to be able to distinguish between the pseudospin partners in the proton N = 4 shell, (d 5/2 ,g 7/2 ) and (d 3/2 ,s 1/2 ). The yrast bands are predicted to terminate, which explains the structure of a TSD-like band X2. A band crossing at I ≈ 36.5 for the TSD band in 161 Lu, unique within the chain of even-N Lu isotopes, is well described by the CNSB model.

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“…The nuclei near A ∼ 135 with the neutron number approaching N = 82 shell closure show shape driving effects at high spins with moderate deformation and display a variety of interesting phenomena such as shape coexistence, magnetic rotation (MR), chiral rotation, dynamic symmetry in 134 Ba, and dynamic chirality in nuclei [1][2][3][4][5][6][7][8][9][10]. The Nilsson diagram indicates that there are several positive parity states originating from g 7/2 , d 5/2 , d 3/2 , and s 1/2 shells and a negative parity state originating from the h 11/2 shell.…”

Section: Introductionmentioning

confidence: 99%

High spin states in57135La78

et al. 2013

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High spin states in 135 La have been investigated using the 128 Te( 11 B,4n) 135 La reaction at a beam energy of 50.5 MeV using the Indian National Gamma Array (INGA). The level scheme has been confirmed and extended both for low and high spin states with the observation of several new transitions. The Directional Correlations of Oriented states (DCO) ratios and linear polarization measurements have been performed to assign spin-parity for most of the reported γ transitions. A new positive parity band has been observed and identified as a decoupled band ( I = 2). Two negative parity dipole bands ( I = 1) have been established and for one of the dipole bands the crossover E2 transitions have been identified for the first time. On the basis of the Tilted Axis Cranking (TAC) calculations, a three quasiparticle (qp) π (h 11/2 ) 1 ⊗ ν(h 11/2 ) −2 configuration and 5qp π (h 11/2 ) 1 (g 7/2 /d 5/2 ) 2 ⊗ ν(h 11/2 ) −2 configuration have been assigned to these two dipole bands. The comparison with experimental observables supports the configuration assignments for both the dipole bands.

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Exotic Nuclear Excitations

Cited by 22 publications

References 0 publications

Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems

Lifetime measurements in mass regions A=100 and A=130 as a test for chirality in nuclear systems

Interpretation of the high spin states inLu161: A paired and unpaired study

High spin states in57135La78

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