Gamma-gamma directional correlation measurements in<sup>130,132</sup>Xe following thermal neutron capture by natural xenon

Hamada, Sh.; Hamilton, W D; More, B.R.

doi:10.1088/0305-4616/14/9/009

Cited by 13 publications

(8 citation statements)

References 19 publications

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“…From thermal neutron capture data, a level at 1590 keV was proposed as the first excited 0 + state of 130 Xe by Hamada et al [15]. In the present INS measurements, however, no evidence of the decays of this level was found and we refute its existence.…”

Section: Resultscontrasting

confidence: 70%

“…When compared with the CINDY calculations, the excitation function does not agree with a spin of 1 or 2 + , but rather supports 0 + . A ground-state γ ray observed in neutron capture at thermal energies and at a resonant energy of 14.1 eV [15,21] is reported in the NDS [14], but no primary γ ray was observed to this level, and it was only assumed that the 2169-keV γ ray represented a transition to the ground state. This γ ray is not observed in our measurements.…”

Section: Resultsmentioning

confidence: 99%

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0+states inXe130,132: A search for E(5) behavior

et al. 2016

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The level structures of 130,132 Xe were studied with the inelastic neutron scattering reaction followed by γ-ray detection. Level lifetimes were measured using the Doppler-shift attenuation method and low-lying excited states in these nuclei were characterized. With a focus on the decay properties of the 0 + states, these nuclei were examined as representations of the E(5) critical-point symmetry.

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Section: Resultscontrasting

confidence: 70%

Section: Resultsmentioning

confidence: 99%

0+states inXe130,132: A search for E(5) behavior

et al. 2016

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“…A third excited 0 + state at 2017 keV is the subject of several discrepancies in the recent literature. Two decays are assigned to the level in the Nuclear Data Sheets [8] Cross Section (mb) relative γ-ray intensities, closer to (I γ (894 keV) / I γ (1481 keV) = 1 / 3) [9,10]. The recent work by Coquard et al [1] sheds some light on the issue.…”

Section: -Kev Levelmentioning

confidence: 99%

“…This level originates from a thermal-neutron capture study, on natural xenon, where it was tentatively assigned J π = 0 + [9]. The level is also listed in the more recent paper by Coquard et al, which utilizes Coulomb excitation [1].…”

Section: -Kev Levelmentioning

confidence: 99%

“No-spin” states and low-lying structures in¹³⁰Xe and¹³⁶Xe

Ross

Peters

Chakraborty

et al. 2015

EPJ Web of Conferences

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Abstract. Inelastic neutron scattering on solid 130 XeF 2 and 136 XeF 2 targets was utilized to populate excited levels in 130 Xe and 136 Xe. When calculating nuclear matrix elements vital to the understanding of double-beta decay, it is important to have a clear understanding of the low-lying level structure of both the parent and daughter nucleus. Of particular relevance to double-beta decay searches are the assignments of 0 + states. We show here that in the case of 130 Xe there are several discrepancies in the adopted level structure. We found that one previous 0 + candidate level (1590 keV) can be ruled out and assigned two additional candidates (2223 and 2242 keV). In 136 Xe we question the previous assignment of a 0 + level at 2582 keV. Excitation function and angular distribution measurements were utilized to make spin and parity assignments of levels and place new transitions.

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“…However, in the analysis, the unknown Q s of these two states were set to 0. [34,35], and the γ -ray branching ratios were calculated using data from Ref. [3].…”

Section: Coulomb-excitation Data Analysismentioning

confidence: 99%

Quadrupole deformation of Xe130 measured in a Coulomb-excitation experiment

et al. 2020

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Low-lying states in the isotope 130 Xe were populated in a Coulomb-excitation experiment performed at CERN's HIE-ISOLDE facility. The magnitudes and relative signs of seven E 2 matrix elements and one M1 matrix element coupling five low-lying states in 130 Xe were determined using the semiclassical coupled-channel Coulomb-excitation least-squares search code GOSIA. The diagonal E 2 matrix elements of both the 2 + 1 and 4 + 1 states were extracted for the first time. The reduced transition strengths are in line with those obtained from previous measurements. Experimental results were compared with the general Bohr Hamiltonian with the microscopic input from mean-field theory utilizing universal nuclear energy density functional (UNEDF0), shell-model calculations using the GCN50:82 and SN100PN interactions, and simple phenomenological models (Davydov-Filippov and γ-soft). The extracted shape parameters indicate triaxial-prolate deformation in the ground-state band. In general, good agreement between theoretical predictions and experimental values was found, while neither phenomenological model was found to provide an adequate description of 130 Xe.

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Gamma-gamma directional correlation measurements in^130,132Xe following thermal neutron capture by natural xenon

Cited by 13 publications

References 19 publications

0+states inXe130,132: A search for E(5) behavior

0+states inXe130,132: A search for E(5) behavior

“No-spin” states and low-lying structures in¹³⁰Xe and¹³⁶Xe

Quadrupole deformation of Xe130 measured in a Coulomb-excitation experiment

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Gamma-gamma directional correlation measurements in130,132Xe following thermal neutron capture by natural xenon

Cited by 13 publications

References 19 publications

0+states inXe130,132: A search for E(5) behavior

0+states inXe130,132: A search for E(5) behavior

“No-spin” states and low-lying structures in130Xe and136Xe

Quadrupole deformation of Xe130 measured in a Coulomb-excitation experiment

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Product

Resources

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Gamma-gamma directional correlation measurements in^130,132Xe following thermal neutron capture by natural xenon

“No-spin” states and low-lying structures in¹³⁰Xe and¹³⁶Xe